屏幕亮屏、熄屏监听代码

 

 

 

package com.yc.ai.common.receiver;


import java.lang.reflect.Method;


import com.yc.ai.common.utils.LogUtils;


import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.PowerManager;


public class ScreenObserver {
private static String TAG = "ScreenObserver";
private Context mContext;
private ScreenBroadcastReceiver mScreenReceiver;
private ScreenStateListener mScreenStateListener;
private static Method mReflectScreenState;


public ScreenObserver(Context context) {
mContext = context;
mScreenReceiver = new ScreenBroadcastReceiver();
try {
mReflectScreenState = PowerManager.class.getMethod("isScreenOn",
new Class[] {});
} catch (NoSuchMethodException nsme) {
LogUtils.d(TAG, "API < 7," + nsme);
}
}


/**
* screen状态广播接收者
* 
* 
*/
private class ScreenBroadcastReceiver extends BroadcastReceiver {
private String action = null;


@Override
public void onReceive(Context context, Intent intent) {
action = intent.getAction();
if (Intent.ACTION_SCREEN_ON.equals(action)) {
if (mScreenStateListener != null){
mScreenStateListener.onScreenOn();
}
} else if (Intent.ACTION_SCREEN_OFF.equals(action)) {
if (mScreenStateListener != null){
mScreenStateListener.onScreenOff();
}
}
}


}


/**
* 请求screen状态更新
* 
* @param listener
*/
public void requestScreenStateUpdate(ScreenStateListener listener) {
mScreenStateListener = listener;
startScreenBroadcastReceiver();
// firstGetScreenState();
}


/**
* 第一次请求screen状态
*/
private void firstGetScreenState() {
PowerManager manager = (PowerManager) mContext.getSystemService(Activity.POWER_SERVICE);
if (isScreenOn(manager)) {
if (mScreenStateListener != null) {
mScreenStateListener.onScreenOn();
}
} else {
if (mScreenStateListener != null) {
mScreenStateListener.onScreenOff();
}
}
}


/**
* 停止screen状态更新
*/
public void stopScreenStateUpdate() {
mContext.unregisterReceiver(mScreenReceiver);
}


/**
* 启动screen状态广播接收器
*/
private void startScreenBroadcastReceiver() {
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
mContext.registerReceiver(mScreenReceiver, filter);
}


/**
* screen是否打开状态
* 
* @param pm
* @return
*/
private static boolean isScreenOn(PowerManager pm) {
boolean screenState;
try {
screenState = (Boolean) mReflectScreenState.invoke(pm);
} catch (Exception e) {
screenState = false;
}
return screenState;
}


public interface ScreenStateListener {
public void onScreenOn();


public void onScreenOff();
}
}