摇动传感器不工作

喜在这里，我补充示例源代码抖动传感器。请尝试这个例子。希望对你有帮助。请让我知道你有没有问题。

main.xml中

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_above="@ id/footer"

android:padding="10dp"

android:background="#eaeae8" >

android:id="@ id/txtSettings"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:padding="10dp"

android:text="Enable and Disable the Sensor">

android:id="@ id/label"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:padding="10dip"

android:textSize="16sp"

android:textStyle="bold" >

android:id="@ id/sensorSettings"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@ id/txtSettings"

android:layout_below="@ id/txtSettings"

android:layout_marginTop="18dp" >

android:id="@ id/enable"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Sensor Enable" />

android:id="@ id/disable"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Sensor Disable" />

SensorTestActivity.java

import android.app.Activity;

import android.graphics.Color;

import android.hardware.Sensor;

import android.hardware.SensorEvent;

import android.hardware.SensorEventListener;

import android.hardware.SensorManager;

import android.os.Bundle;

import android.view.View;

import android.view.Window;

import android.view.WindowManager;

import android.widget.RadioGroup;

import android.widget.RadioGroup.OnCheckedChangeListener;

import android.widget.Toast;

public class SensorTestActivity extends Activity implements SensorEventListener {

private SensorManager sensorManager;

private boolean color = false;

private View view;

private long lastUpdate;

static boolean enableSensor = true;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

requestWindowFeature(Window.FEATURE_NO_TITLE);

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

WindowManager.LayoutParams.FLAG_FULLSCREEN);

setContentView(R.layout.main);

view = findViewById(R.id.label);

view.setBackgroundColor(Color.GREEN);

sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

sensorManager.registerListener(this,

sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),

SensorManager.SENSOR_DELAY_NORMAL);

lastUpdate = System.currentTimeMillis();

RadioGroup sensorSettings =(RadioGroup)findViewById(R.id.sensorSettings);

sensorSettings.setOnCheckedChangeListener(new OnCheckedChangeListener(){

@Override

public void onCheckedChanged(RadioGroup group, int checkedId) {

// checkedId is the RadioButton selected

switch(checkedId) {

case R.id.enable:

enableSensor = true;

break;

case R.id.disable:

enableSensor = false;

break;

}

}

});

}

@Override

public void onSensorChanged(SensorEvent event) {

if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {

if(enableSensor){

getAccelerometer(event);

}

}

}

private void getAccelerometer(SensorEvent event) {

float[] values = event.values;

// Movement

float x = values[0];

float y = values[1];

float z = values[2];

float accelationSquareRoot = (x * x y * y z * z)

/(SensorManager.GRAVITY_EARTH * SensorManager.GRAVITY_EARTH);

long actualTime = System.currentTimeMillis();

if (accelationSquareRoot >= 2) //

{

if (actualTime - lastUpdate < 200) {

return;

}

lastUpdate = actualTime;

Toast.makeText(this, "Device has shaken", Toast.LENGTH_SHORT)

.show();

if (color) {

view.setBackgroundColor(Color.GREEN);

} else {

view.setBackgroundColor(Color.RED);

}

color = !color;

}

}

@Override

public void onAccuracyChanged(Sensor sensor, int accuracy) {

}

@Override

protected void onResume() {

super.onResume();

// register this class as a listener for the orientation and

// accelerometer sensors

sensorManager.registerListener(this,

sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),

SensorManager.SENSOR_DELAY_NORMAL);

}

@Override

protected void onPause() {

// unregister listener

super.onPause();

sensorManager.unregisterListener(this);

}

}

请添加AndroidManifest权限。