期末安卓项目：Android+web+SQL“电影”项目成品图片在最后

时间：2023-01-17 02:30:00 fqp8n60晶体管

准备工作

idea编辑工具(专业版)

IntelliJ IDEA创建Servlet最新方法

mysql：个人使用的MySQL5.7编辑

mysql：可以使用SQLyou编辑

Android：可以使用Android Stuodio编辑

Android中代码

IDEA中代码

个人错误

Java代码错误

部分需要jar包和框架

显示代码：

Android：页面显示

idea的java：页面显示

编辑

总结

准备工作
1. idea工具(专业版)
2. IntelliJ IDEA创建Servlet最新方法

Android中代码

框架：
需要的jar包放在下main

具体代码.

MainActivity

package com.e.myapplicationtest.activity;  import androidx.appcompat.app.AppCompatActivity; import androidx.fragment.app.Fragment; import androidx.viewpager.widget.ViewPager;  import android.os.Bundle; import android.util.Log; import android.widget.TextView;  import com.e.myapplicationtest.R; import com.e.myapplicationtest.fragment.MyPagerAdapter; import com.e.myapplicationtest.fragment.NewsFramgment1; import com.e.myapplicationtest.fragment.NewsFramgment2; import com.e.myapplicationtest.fragment.NewsFramgment3; import com.e.myapplicationtest.fragment.NewsFramgment4; import com.google.android.material.tabs.TabLayout;  import java.util.ArrayList; import java.util.List;  public class MainActivity extends AppCompatActivity {     private ViewPager mViewPager;     private TabLayout tabLayout;     private MyPagerAdapter myPagerAdapter;     private List titlelist = new ArrayList();     private NewsFramgment1 nfragment1;     private NewsFramgment2 nfragment2;     private NewsFramgment3 nfragment3;     private NewsFramgment4 nfragment4;      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         initView();     }       private void initView() {         titlelist.add("爱情");         titlelist.add("励志");         titlelist.add("喜剧");         titlelist.add("我的");         nfragment1 = new NewsFramgment1();         nfragment2 = new NewsFramgment2();         nfragment3 = new NewsFramgment3();         nfragment4 = new NewsFramgment4();            ArrayList fragmntList = nw ArrayList();
        fragmntList.add(nfragment1);
        fragmntList.add(nfragment2);
        fragmntList.add(nfragment3);
        fragmntList.add(nfragment4);

        mViewPager = (ViewPager) findViewById(R.id.viewpager);
        tabLayout = (TabLayout) findViewById(R.id.tab_layout);
        myPagerAdapter = new MyPagerAdapter(getSupportFragmentManager(),titlelist, fragmntList);
        mViewPager.setAdapter(myPagerAdapter);
        tabLayout.setupWithViewPager(mViewPager);

    }
}

ShowNewsActivity

package com.e.myapplicationtest.activity;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.Window;
import android.widget.TextView;

import com.e.myapplicationtest.R;
import com.e.myapplicationtest.bean.NewsBean;
import com.loopj.android.image.SmartImageView;

public class ShowNewsActivity extends AppCompatActivity {
    TextView title,author,time,content;
    SmartImageView imageView;
    static BitmapFactory.Options opts;
    Bitmap bitmap = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //去掉标题栏
        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.activity_show_news);

        Intent intent = getIntent();
        NewsBean newsBean = (NewsBean) intent.getExtras().getSerializable("NewsList");
        // 显示子啊什么位置
        title = (TextView) this.findViewById(R.id.title);
        author = (TextView) this.findViewById(R.id.author);
        time = (TextView) this.findViewById(R.id.time);
        content = (TextView) this.findViewById(R.id.content);
        imageView = (SmartImageView) this.findViewById(R.id.img_name);
        // 获取数据
        title.setText(newsBean.getTitle());
        author.setText(newsBean.getAuthor());
        time.setText(newsBean.getTime());
        content.setText(newsBean.getContent());
        imageView.setImageUrl("http//（ip地址）:8080/Web1/TestServlet/img/"+newsBean.getImg_name(),R.drawable.newspic1);


    }
}

NewsBean

package com.e.myapplicationtest.bean;

import java.io.Serializable;

public class NewsBean implements Serializable {
    public int id;
    public String title;
    public String content;
    public String img_url;
    public String img_name;
    public String big_img_name;
    public String author;
    public String time;
    public int type_id;
    private int status;
    public NewsBean()
    {

    }
    public NewsBean(int id, String title, String content, String img_url,
                    String img_name, String big_img_name, String author, String time,int type_id,int status) {
        this.id = id;
        this.title = title;
        this.content = content;
        this.img_url = img_url;
        this.img_name = img_name;
        this.big_img_name = big_img_name;
        this.author = author;
        this.time = time;
        this.type_id = type_id;
        this.status=status;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    public String getImg_url() {
        return img_url;
    }

    public void setImg_url(String img_url) {
        this.img_url = img_url;
    }

    public String getImg_name() {
        return img_name;
    }

    public void setImg_name(String img_name) {
        this.img_name = img_name;
    }

    public String getBig_img_name() {
        return big_img_name;
    }

    public void setBig_img_name(String big_img_name) {
        this.big_img_name = big_img_name;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getTime() {
        return time;
    }

    public void setTime(String time) {
        this.time = time;
    }

    public int getType_id() {
        return type_id;
    }

    public void setType_id(int type_id) {
        this.type_id = type_id;
    }
    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }
}

MyPagerAdapter

package com.e.myapplicationtest.fragment;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentPagerAdapter;

import java.util.ArrayList;
import java.util.List;

public class MyPagerAdapter extends FragmentPagerAdapter {
    private List titlelist;
    private ArrayList fragmentList;
    public MyPagerAdapter(FragmentManager fm, List titlelist, ArrayList fragmentList) {
        super(fm);
        this.titlelist = titlelist;
        this.fragmentList = fragmentList;
    }

    @NonNull
    @Override
    public Fragment getItem(int position) {
        return fragmentList.get(position);
    }

    @Override
    public int getCount() {
        return fragmentList.size();
    }

    @Nullable
    @Override
    public CharSequence getPageTitle(int position) {
        return titlelist.get(position);
    }
}

NewsFramgment1

package com.e.myapplicationtest.fragment;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;

//import androidx.fragment.app.Fragment;

import android.preference.PreferenceActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;

import com.e.myapplicationtest.R;
import com.e.myapplicationtest.activity.ShowNewsActivity;
import com.e.myapplicationtest.bean.NewsBean;
import com.e.myapplicationtest.tool.JsonParse;
import com.e.myapplicationtest.tool.NewsListAdapter;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;

import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.viewpager.widget.PagerAdapter;
import androidx.viewpager.widget.ViewPager;

import org.apache.http.Header;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link NewsFramgment1#?newInstance} factory method to
 * create an instance of this fragment.
 */
public class NewsFramgment1 extends Fragment {
    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER

    ListView listView = null;
    List newsLists = new ArrayList();
    AsyncHttpClient client = new AsyncHttpClient();//创建AsyncHttpClient实例
    //    ListView listView = null;
    private View mMainView;
    //显示新闻大图片代码
    private ViewPager viewPager;
    private ImageView[] tips;//提示性点点数组
    private int[] images;//图片ID数组
    private int[] image_tips;
    private int currentPage = 0 ;
    public Bitmap[] bmp = null;
    public Bitmap[] bmp_tips = null;

    public NewsFramgment1() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     //     * @param param1 Parameter 1.
     //     * @param param2 Parameter 2.
     * @return A new instance of fragment NewsFramgment1.
     */
    // TODO: Rename and change types and number of parameters


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LayoutInflater inflater = getActivity().getLayoutInflater();
        mMainView = inflater.inflate(R.layout.fragment_news_framgment1,(ViewGroup) getActivity().findViewById(R.id.viewpager),false);
        showBigImages();
        listView = (ListView) mMainView.findViewById(R.id.listview);

        //使用GET方式请求
        client.get("http://（ip地址）:8080/Web1/TestServlet/NewsSL?typeId=1",new AsyncHttpResponseHandler(){

            public void onSuccess(int i , org.apache.http.Header[] headers, byte[] bytes){
                //请求成功
                try {
                    String json = new String(bytes,"gbk");
                    newsLists = JsonParse.getNewsInfo(json);
                    if (newsLists == null){
                        Log.i("newsList","解析失败！");
                    }else {
                        NewsListAdapter adapter = new NewsListAdapter(getActivity(),newsLists,listView);
                        listView.setAdapter(adapter);
                        //新闻列表被选中监听，跳转到新闻详细页面
                        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                            @Override
                            public void onItemClick(AdapterView arg0, View arg1, int arg2, long arg3) {
                                Intent intent = new Intent(getActivity(), ShowNewsActivity.class);
                                NewsBean newsBean = newsLists.get(arg2);
                                Bundle bundle = new Bundle();
                                bundle.putSerializable("NewsList",newsBean);
                                intent.putExtras(bundle);
                                startActivity(intent);
                            }
                        });
                    }
                }catch (Exception e){
                    e.printStackTrace();
                }
            }

            @Override
            public void onFailure(int i, org.apache.http.Header[] headers ,byte[] bytes,Throwable throwable){

            }
        });
    }

    private void showBigImages() {
        viewPager =(ViewPager) mMainView.findViewById(R.id.viewpager1);
        //存放点点的容器
        LinearLayout tipsBox = (LinearLayout) mMainView.findViewById(R.id.tipsBox);
        //初始化图片资源
        images = new int[]{R.drawable.app7,R.drawable.app2,R.drawable.app6};
        image_tips = new int[]{R.drawable.page, R.drawable.pagenow};
        BitmapFactory.Options opts = new BitmapFactory.Options();
        opts.inPreferredConfig = Bitmap.Config.RGB_565;
        opts.inPurgeable = true;
        opts.inInputShareable = true;
        bmp = new Bitmap[images.length];
        for (int i = 0; i < images.length;i++){
            InputStream is = this.getResources().openRawResource(images[i]);
            bmp[i] = BitmapFactory.decodeStream(is,null,opts);//将普通图片转换成位图
        }
        //小原点图片
        bmp_tips = new Bitmap[image_tips.length];
        for (int i = 0 ; i < image_tips.length;i++){
            InputStream is = this.getResources().openRawResource(image_tips[i]);
            bmp_tips[i] = BitmapFactory.decodeStream(is,null,opts);//将普通图片转换成位图
        }
        //初始化 提示点点
        tips = new ImageView[10];
        for (int i = 0 ; i< images.length;i++){
            ImageView img = new ImageView(getActivity());
            img.setLayoutParams(new LinearLayout.LayoutParams(20,20));
            tips[i] = img;
            if (i == 0){
                img.setImageBitmap(bmp_tips[1]);
            }else {
                img.setImageBitmap(bmp_tips[0]);
            }
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    new ViewGroup.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
            params.leftMargin = 20;
            params.rightMargin =20;
            tipsBox.addView(img,params);
        }
        //初始化PagerAdapter
        PagerAdapter adapter = new PagerAdapter() {
            @Override
            public int getCount() {
                return images.length;
            }

            @Override
            public boolean isViewFromObject(@NonNull View arg0, @NonNull Object arg1) {
                return arg0 == arg1;
            }

            @NonNull
            @Override
            public Object instantiateItem(@NonNull ViewGroup container, int position) {
                ImageView im = new ImageView(getActivity());
                im.setScaleType(ImageView.ScaleType.CENTER);
                im.setImageBitmap(zoomImg(bmp[position],680,420));
                container.addView(im);
                return im;
            }


        };
        viewPager.setAdapter(adapter);
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                Log.e("rf",String.valueOf(position));
                tips[currentPage].setImageBitmap(bmp_tips[0]);
                currentPage = position;
                tips[currentPage].setImageBitmap(bmp_tips[1]);
            }

            @Override
            public void onPageScrollStateChanged(int arg0) {

            }
        });
    }
    private Bitmap zoomImg(Bitmap bm,int newWidth,int newHeight) {
        //获得图片的宽高
        int width = bm.getWidth();
        int height = bm.getHeight();
        //计算缩放比例
        float scaleWidth = ((float) newWidth)/width;
        float scaleHeight = ((float) newHeight)/height;
        //取得想要缩放的matrix参数
        Matrix martix = new Matrix();
        martix.postScale(scaleWidth,scaleHeight);
        //取得新的图片，www.2cto.com
        Bitmap newbm = Bitmap.createBitmap(bm,0,0,width,height,martix,true);
        return newbm;

    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        ViewGroup p = (ViewGroup) mMainView.getParent();
        if (p!=null) {
            p.removeAllViewsInLayout();
        }
        return mMainView;
    }
}

NewsFramgment2

package com.e.myapplicationtest.fragment;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.viewpager.widget.PagerAdapter;
import androidx.viewpager.widget.ViewPager;

import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;

import com.e.myapplicationtest.R;
import com.e.myapplicationtest.activity.ShowNewsActivity;
import com.e.myapplicationtest.bean.NewsBean;
import com.e.myapplicationtest.tool.JsonParse;
import com.e.myapplicationtest.tool.NewsListAdapter;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link NewsFramgment2#?newInstance} factory method to
 * create an instance of this fragment.
 */
public class NewsFramgment2 extends Fragment {

    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    ListView listView = null;
    List newsLists = new ArrayList();
    AsyncHttpClient client = new AsyncHttpClient();//创建AsyncHttpClient实例

    //    ListView listView = null;
    private View mMainView;
    //显示新闻大图片代码
    private ViewPager viewPager;
    private ImageView[] tips;//提示性点点数组
    private int[] images;//图片ID数组
    private int[] image_tips;
    private int currentPage = 0 ;
    public Bitmap[] bmp = null;
    public Bitmap[] bmp_tips = null;

    public NewsFramgment2() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     //     * @param param1 Parameter 1.
     //     * @param param2 Parameter 2.
     * @return A new instance of fragment NewsFramgment1.
     */
    // TODO: Rename and change types and number of parameters


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LayoutInflater inflater = getActivity().getLayoutInflater();
        mMainView = inflater.inflate(R.layout.fragment_news_framgment2,(ViewGroup) getActivity().findViewById(R.id.viewpager),false);
        showBigImages();
        listView = (ListView) mMainView.findViewById(R.id.listview);

        //使用GET方式请求
        client.get("http://（ip地址）:8080/Web1/TestServlet/NewsSL?typeId=2",new AsyncHttpResponseHandler(){


            public void onSuccess(int i , org.apache.http.Header[] headers, byte[] bytes){
                //请求成功
                try {
                    String json = new String(bytes,"gbk");
                    newsLists = JsonParse.getNewsInfo(json);
                    if (newsLists == null){
                        Log.i("newsList","解析失败！");
                    }else {
                        NewsListAdapter adapter = new NewsListAdapter(getActivity(),newsLists,listView);
                        listView.setAdapter(adapter);
                        //新闻列表被选中监听，跳转到新闻详细页面
                        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                            @Override
                            public void onItemClick(AdapterView arg0, View arg1, int arg2, long arg3) {
                                Intent intent = new Intent(getActivity(), ShowNewsActivity.class);
                                NewsBean newsBean = newsLists.get(arg2);
                                Bundle bundle = new Bundle();
                                bundle.putSerializable("NewsList",newsBean);
                                intent.putExtras(bundle);
                                startActivity(intent);
                            }
                        });
                    }
                }catch (Exception e){
                    e.printStackTrace();
                }
            }

            @Override
            public void onFailure(int i, org.apache.http.Header[] headers ,byte[] bytes,Throwable throwable){

            }
        });
    }

    private void showBigImages() {


        viewPager =(ViewPager) mMainView.findViewById(R.id.viewpager2);
        //存放点点的容器
        LinearLayout tipsBox = (LinearLayout) mMainView.findViewById(R.id.tipsBox);
        //初始化图片资源
        images = new int[]{R.drawable.app9,R.drawable.app15,R.drawable.app5};
        image_tips = new int[]{R.drawable.page, R.drawable.pagenow};
        BitmapFactory.Options opts = new BitmapFactory.Options();
        opts.inPreferredConfig = Bitmap.Config.RGB_565;
        opts.inPurgeable = true;
        opts.inInputShareable = true;
        bmp = new Bitmap[images.length];
        for (int i = 0; i < images.length;i++){
            InputStream is = this.getResources().openRawResource(images[i]);
            bmp[i] = BitmapFactory.decodeStream(is,null,opts);//将普通图片转换成位图
        }
        //小原点图片
        bmp_tips = new Bitmap[image_tips.length];
        for (int i = 0 ; i < image_tips.length;i++){
            InputStream is = this.getResources().openRawResource(image_tips[i]);
            bmp_tips[i] = BitmapFactory.decodeStream(is,null,opts);//将普通图片转换成位图
        }
        //初始化 提示点点
        tips = new ImageView[5];
        for (int i = 0 ; i< images.length;i++){
            ImageView img = new ImageView(getActivity());
            img.setLayoutParams(new LinearLayout.LayoutParams(20,20));
            tips[i] = img;
            if (i == 0){
                img.setImageBitmap(bmp_tips[1]);
            }else {
                img.setImageBitmap(bmp_tips[0]);
            }
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    new ViewGroup.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
            params.leftMargin = 20;
            params.rightMargin =20;
            tipsBox.addView(img,params);
        }
        //初始化PagerAdapter
        PagerAdapter adapter = new PagerAdapter() {
            @Override
            public int getCount() {
                return images.length;
            }

            @Override
            public boolean isViewFromObject(@NonNull View arg0, @NonNull Object arg1) {
                return arg0 == arg1;
            }

            @NonNull
            @Override
            public Object instantiateItem(@NonNull ViewGroup container, int position) {
                ImageView im = new ImageView(getActivity());
                im.setScaleType(ImageView.ScaleType.CENTER);
                im.setImageBitmap(zoomImg(bmp[position],680,420));
                container.addView(im);
                return im;
            }


        };
        viewPager.setAdapter(adapter);
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                Log.e("rf",String.valueOf(position));
                tips[currentPage].setImageBitmap(bmp_tips[0]);
                currentPage = position;
                tips[currentPage].setImageBitmap(bmp_tips[1]);
            }

            @Override
            public void onPageScrollStateChanged(int arg0) {

            }
        });
    }
    private Bitmap zoomImg(Bitmap bm,int newWidth,int newHeight) {
        //获得图片的宽高
        int width = bm.getWidth();
        int height = bm.getHeight();
        //计算缩放比例
        float scaleWidth = ((float) newWidth)/width;
        float scaleHeight = ((float) newHeight)/height;
        //取得想要缩放的matrix参数
        Matrix martix = new Matrix();
        martix.postScale(scaleWidth,scaleHeight);
        //取得新的图片，www.2cto.com
        Bitmap newbm = Bitmap.createBitmap(bm,0,0,width,height,martix,true);
        return newbm;

    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        ViewGroup p = (ViewGroup) mMainView.getParent();
        if (p!=null) {
            p.removeAllViewsInLayout();
        }
        return mMainView;
    }
}

NewsFramgment3

package com.e.myapplicationtest.fragment;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;

//import androidx.fragment.app.Fragment;

import android.preference.PreferenceActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;

import com.e.myapplicationtest.R;
import com.e.myapplicationtest.activity.ShowNewsActivity;
import com.e.myapplicationtest.bean.NewsBean;
import com.e.myapplicationtest.tool.JsonParse;
import com.e.myapplicationtest.tool.NewsListAdapter;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;

import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.viewpager.widget.PagerAdapter;
import androidx.viewpager.widget.ViewPager;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link NewsFramgment3#?newInstance} factory method to
 * create an instance of this fragment.
 */
public class NewsFramgment3 extends Fragment {

    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    ListView listView = null;
    List newsLists = new ArrayList();
    AsyncHttpClient client = new AsyncHttpClient();//创建AsyncHttpClient实例



    //    ListView listView = null;
    private View mMainView;
    //显示新闻大图片代码
    private ViewPager viewPager;
    private ImageView[] tips;//提示性点点数组
    private int[] images;//图片ID数组
    private int[] image_tips;
    private int currentPage = 0 ;
    public Bitmap[] bmp = null;
    public Bitmap[] bmp_tips = null;

    public NewsFramgment3() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     //     * @param param1 Parameter 1.
     //     * @param param2 Parameter 2.
     * @return A new instance of fragment NewsFramgment1.
     */
    // TODO: Rename and change types and number of parameters


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LayoutInflater inflater = getActivity().getLayoutInflater();
        mMainView = inflater.inflate(R.layout.fragment_news_framgment3,(ViewGroup) getActivity().findViewById(R.id.viewpager),false);
        showBigImages();
        listView = (ListView) mMainView.findViewById(R.id.listview);

        //使用GET方式请求
        client.get("http://（ip地址）:8080/Web1/TestServlet/NewsSL?typeId=3",new AsyncHttpResponseHandler(){


            public void onSuccess(int i , org.apache.http.Header[] headers, byte[] bytes){
                //请求成功
                try {
                    String json = new String(bytes,"gbk");
                    newsLists = JsonParse.getNewsInfo(json);
                    if (newsLists == null){
                        Log.i("newsList","解析失败！");
                    }else {
                        NewsListAdapter adapter = new NewsListAdapter(getActivity(),newsLists,listView);
                        listView.setAdapter(adapter);
                        //新闻列表被选中监听，跳转到新闻详细页面
                        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                            @Override
                            public void onItemClick(AdapterView arg0, View arg1, int arg2, long arg3) {
                                Intent intent = new Intent(getActivity(), ShowNewsActivity.class);
                                NewsBean newsBean = newsLists.get(arg2);
                                Bundle bundle = new Bundle();
                                bundle.putSerializable("NewsList",newsBean);
                                intent.putExtras(bundle);
                                startActivity(intent);
                            }
                        });
                    }
                }catch (Exception e){
                    e.printStackTrace();
                }
            }

            @Override
            public void onFailure(int i, org.apache.http.Header[] headers ,byte[] bytes,Throwable throwable){

            }
        });
    }

    private void showBigImages() {


        viewPager =(ViewPager) mMainView.findViewById(R.id.viewpager3);
        //存放点点的容器
        LinearLayout tipsBox = (LinearLayout) mMainView.findViewById(R.id.tipsBox);
        //初始化图片资源
        images = new int[]{R.drawable.app13,R.drawable.app14,R.drawable.app11};
        image_tips = new int[]{R.drawable.page, R.drawable.pagenow};
        BitmapFactory.Options opts = new BitmapFactory.Options();
        opts.inPreferredConfig = Bitmap.Config.RGB_565;
        opts.inPurgeable = true;
        opts.inInputShareable = true;
        bmp = new Bitmap[images.length];
        for (int i = 0; i < images.length;i++){
            InputStream is = this.getResources().openRawResource(images[i]);
            bmp[i] = BitmapFactory.decodeStream(is,null,opts);//将普通图片转换成位图
        }
        //小原点图片
        bmp_tips = new Bitmap[image_tips.length];
        for (int i = 0 ; i < image_tips.length;i++){
            InputStream is = this.getResources().openRawResource(image_tips[i]);
            bmp_tips[i] = BitmapFactory.decodeStream(is,null,opts);//将普通图片转换成位图
        }
        //初始化 提示点点
        tips = new ImageView[5];
        for (int i = 0 ; i< images.length;i++){
            ImageView img = new ImageView(getActivity());
            img.setLayoutParams(new LinearLayout.LayoutParams(20,20));
            tips[i] = img;
            if (i == 0){
                img.setImageBitmap(bmp_tips[1]);
            }else {
                img.setImageBitmap(bmp_tips[0]);
            }
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    new ViewGroup.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
            params.leftMargin = 20;
            params.rightMargin =20;
            tipsBox.addView(img,params);
        }
        //初始化PagerAdapter
        PagerAdapter adapter = new PagerAdapter() {
            @Override
            public int getCount() {
                return images.length;
            }

            @Override
            public boolean isViewFromObject(@NonNull View arg0, @NonNull Object arg1) {
                return arg0 == arg1;
            }

            @NonNull
            @Override
            public Object instantiateItem(@NonNull ViewGroup container, int position) {
                ImageView im = new ImageView(getActivity());
                im.setScaleType(ImageView.ScaleType.CENTER);
                im.setImageBitmap(zoomImg(bmp[position],680,420));
                container.addView(im);
                return im;
            }


        };
        viewPager.setAdapter(adapter);
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                Log.e("rf",String.valueOf(position));
                tips[currentPage].setImageBitmap(bmp_tips[0]);
                currentPage = position;
                tips[currentPage].setImageBitmap(bmp_tips[1]);
            }

            @Override
            public void onPageScrollStateChanged(int arg0) {

            }
        });
    }
    private Bitmap zoomImg(Bitmap bm,int newWidth,int newHeight) {
        //获得图片的宽高
        int width = bm.getWidth();
        int height = bm.getHeight();
        //计算缩放比例
        float scaleWidth = ((float) newWidth)/width;
        float scaleHeight = ((float) newHeight)/height;
        //取得想要缩放的matrix参数
        Matrix martix = new Matrix();
        martix.postScale(scaleWidth,scaleHeight);
        //取得新的图片，www.2cto.com
        Bitmap newbm = Bitmap.createBitmap(bm,0,0,width,height,martix,true);
        return newbm;

    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        ViewGroup p = (ViewGroup) mMainView.getParent();
        if (p!=null) {
            p.removeAllViewsInLayout();
        }
        return mMainView;
    }
}

NewsFramgment4

package com.e.myapplicationtest.fragment;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;

//import androidx.fragment.app.Fragment;

import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;

import com.e.myapplicationtest.R;

import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.viewpager.widget.PagerAdapter;
import androidx.viewpager.widget.ViewPager;

import java.io.InputStream;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link NewsFramgment4#?newInstance} factory method to
 * create an instance of this fragment.
 */
public class NewsFramgment4 extends Fragment {

    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER

    ListView listView = null;
    private View mMainView;
    //显示新闻大图片代码
    private ViewPager viewPager;
    private ImageView[] tips;//提示性点点数组
    private int[] images;//图片ID数组
    private int[] image_tips;
    private int currentPage = 0 ;
    public Bitmap[] bmp = null;
    public Bitmap[] bmp_tips = null;

    public NewsFramgment4() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     //     * @param param1 Parameter 1.
     //     * @param param2 Parameter 2.
     * @return A new instance of fragment NewsFramgment1.
     */
    // TODO: Rename and change types and number of parameters


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LayoutInflater inflater = getActivity().getLayoutInflater();
        mMainView = inflater.inflate(R.layout.fragment_news_framgment4,(ViewGroup) getActivity().findViewById(R.id.viewpager),false);
        showBigImages();
//        listView = (ListView) mMainView.findViewById(R.id.listview);
    }

    private void showBigImages() {
        viewPager =(ViewPager) mMainView.findViewById(R.id.viewpager4);
        //存放点点的容器
        LinearLayout tipsBox = (LinearLayout) mMainView.findViewById(R.id.tipsBox);
        //初始化图片资源
        images = new int[]{R.drawable.app10,R.drawable.app11,R.drawable.app12,R.drawable.app13,R.drawable.app14};
        image_tips = new int[]{R.drawable.page, R.drawable.pagenow};
        BitmapFactory.Options opts = new BitmapFactory.Options();
        opts.inPreferredConfig = Bitmap.Config.RGB_565;
        opts.inPurgeable = true;
        opts.inInputShareable = true;
        bmp = new Bitmap[images.length];
        for (int i = 0; i < images.length;i++){
            InputStream is = this.getResources().openRawResource(images[i]);
            bmp[i] = BitmapFactory.decodeStream(is,null,opts);//将普通图片转换成位图
        }
        //小原点图片
        bmp_tips = new Bitmap[images.length];
        for (int i = 0 ; i < image_tips.length;i++){
            InputStream is = this.getResources().openRawResource(images[i]);
            bmp_tips[i] = BitmapFactory.decodeStream(is,null,opts);//将普通图片转换成位图
        }
        //初始化 提示点点
        tips = new ImageView[7];
        for (int i = 0 ; i< images.length;i++){
            ImageView img = new ImageView(getActivity());
            img.setLayoutParams(new LinearLayout.LayoutParams(20,20));
            tips[i] = img;
            if (i == 0){
                img.setImageBitmap(bmp_tips[1]);
            }else {
                img.setImageBitmap(bmp_tips[0]);
            }
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    new ViewGroup.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
            params.leftMargin = 20;
            params.rightMargin =20;
            tipsBox.addView(img,params);
        }
        //初始化PagerAdapter
        PagerAdapter adapter = new PagerAdapter() {
            @Override
            public int getCount() {
                return images.length;
            }

            @Override
            public boolean isViewFromObject(@NonNull View arg0, @NonNull Object arg1) {
                return arg0 == arg1;
            }

            @NonNull
            @Override
            public Object instantiateItem(@NonNull ViewGroup container, int position) {
                ImageView im = new ImageView(getActivity());
                im.setScaleType(ImageView.ScaleType.CENTER);
                im.setImageBitmap(zoomImg(bmp[position],680,420));
                container.addView(im);
                return im;
            }


        };
        viewPager.setAdapter(adapter);
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                Log.e("rf",String.valueOf(position));
                tips[currentPage].setImageBitmap(bmp_tips[0]);
                currentPage = position;
                tips[currentPage].setImageBitmap(bmp_tips[1]);
            }

            @Override
            public void onPageScrollStateChanged(int arg0) {

            }
        });
    }
    private Bitmap zoomImg(Bitmap bm,int newWidth,int newHeight) {
        //获得图片的宽高
        int width = bm.getWidth();
        int height = bm.getHeight();
        //计算缩放比例
        float scaleWidth = ((float) newWidth)/width;
        float scaleHeight = ((float) newHeight)/height;
        //取得想要缩放的matrix参数
        Matrix martix = new Matrix();
        martix.postScale(scaleWidth,scaleHeight);
        //取得新的图片，www.2cto.com
        Bitmap newbm = Bitmap.createBitmap(bm,0,0,width,height,martix,true);
        return newbm;

    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        ViewGroup p = (ViewGroup) mMainView.getParent();
        if (p!=null) {
            p.removeAllViewsInLayout();
        }
        return mMainView;
    }
}

JsonParse

package com.e.myapplicationtest.tool;

import com.e.myapplicationtest.bean.NewsBean;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.lang.reflect.Type;
import java.util.List;

public class JsonParse {
    public static List getNewsInfo(String json){
        //使用gson库解析json数据

        Gson gson = new Gson();
        //创建一个TypeToken的匿名子类对象，并调用对象的getType()方法
        Type listType = new TypeToken>(){}.getType();
        //把获取到的信息集合存到newsInfos中
        List newsInfos = gson.fromJson(json,listType);
        return newsInfos;
    }
}

NewsListAdapter

package com.e.myapplicationtest.tool;

import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import androidx.annotation.NonNull;

import com.e.myapplicationtest.R;
import com.e.myapplicationtest.bean.NewsBean;
import com.google.android.material.transition.Hold;
import com.loopj.android.image.SmartImageView;

import org.w3c.dom.Text;

import java.util.List;
import java.util.logging.Handler;

public class NewsListAdapter extends ArrayAdapter {
    private ListView listView;
    private LayoutInflater inflater;
    private Context context;
    Holder holder = null;
//    String imgUrl ="";//存储图片的地址

    public NewsListAdapter(Activity activity, List newsBeans,ListView listView) {
        super(activity,0,newsBeans);
        this.listView = listView;
        //得到一个渲染对象
        inflater = activity.getLayoutInflater();
        this.context = activity;
        holder = new Holder();
    }
    public View getView(int position, View convertView, ViewGroup parent){
        if (convertView == null){
            convertView = inflater.inflate(R.layout.news,null);
            holder.img = (SmartImageView)convertView.findViewById(R.id.img);
            holder.title = (TextView) convertView.findViewById(R.id.title);
            holder.author = (TextView) convertView.findViewById(R.id.author);
            holder.time = (TextView)convertView.findViewById(R.id.time);
            convertView.setTag(holder);
        }else {
            holder = (Holder) convertView.getTag();
        }
        //获取item对应第几条（positon）的Model实体
        NewsBean newsBean = getItem(position);
        String imageUrl = "http://（ip地址）:8080/Web1/TestServlet/img/"+newsBean.getImg_name();
        System.out.println("imageUrl"+imageUrl);
        holder.img.setTag(imageUrl);
        holder.img.setImageUrl(imageUrl,R.drawable.icon);
        holder.title.setText(newsBean.getTitle());
        holder.author.setText(newsBean.getAuthor());
        holder.time.setText(newsBean.getTime());
        Log.i("text","position = "+position);
        return convertView;
    }
    static class Holder{
        SmartImageView img;
        TextView title;
        TextView author;
        TextView time;

    }
}

activity_main.xml
```
    

    
```

activity_show_news.xml

fragment_news_framgment1.xml

fragment_news_framgment2.xml

fragment_news_framgment3.xml

fragment_news_framgment4.xml

news.xml
```
    
    
    

    
```

IDEA中代码

框架：
bootstrap框架，以放在下面

具体的代码

DelNewsServlet

package com.user.action;

import com.user.dao.NewsDao;
import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;

@WebServlet("/delNews")
public class DelNewsServlet extends HttpServlet{
    private static final long serialVersionUID = 1L;

    private NewsDao newsDao = new NewsDao();

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("application/json;charset=gbk");
        String id = request.getParameter("id");
        int delNums = newsDao.delNewById(id);
        //1表示成功 0表示失败
        response.getWriter().write(delNums>0?"1":"0");
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }
}

ListNewsServlet

package com.user.action;

import com.user.bean.NewsBean;
import com.user.dao.NewsDao;
import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

@WebServlet("/listNews")
public class ListNewsServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    private NewsDao newsDao = new NewsDao();
    private List list = new ArrayList();
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setCharacterEncoding("gbk");
        list = newsDao.findAllNews();
        request.setAttribute("newsList",list);
        request.getRequestDispatcher("news.jsp").forward(request,response


            锐单商城拥有海量元器件数据手册、IC替代型号，打造电子元器件IC百科大全！

期末安卓项目：Android+web+SQL“电影”项目成品图片在最后

准备工作

idea工具(专业版)

mysql：个人使用的MySQL5.7

mysql：可以使用SQLyou

Android：可以使用Android Stuodio

Android中代码

IDEA中代码

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