用到的场景很多，自己发挥 ，废话不多说直接上代码：
private classScreenBroadcastReceiverextendsBroadcastReceiver{
privateStringaction= null;
@Override
public voidonReceive(Context context,Intent intent) {
action=intent.getAction();
if(Intent.ACTION_SCREEN_ON.equals(action)) {// 开屏
mScreenStateListener.onScreenOn();
}else if(Intent.ACTION_SCREEN_OFF.equals(action)) {// 锁屏
mScreenStateListener.onScreenOff();
}else if(Intent.ACTION_USER_PRESENT.equals(action)) {// 解锁
mScreenStateListener.onUserPresent();
}
}
}
/**
* 开始监听screen状态
*
* @paramlistener
*/
public voidbegin(ScreenStateListener listener) {
mScreenStateListener=listener;
registerListener();
getScreenState();
}
/**
* 获取screen状态
*/
private voidgetScreenState() {
PowerManagermanager=(PowerManager)mContext.getSystemService(Context.POWER_SERVICE);
if(manager.isScreenOn()) {
if(mScreenStateListener!= null) {
mScreenStateListener.onScreenOn();
}
}else{
if(mScreenStateListener!= null) {
mScreenStateListener.onScreenOff();
}
}
}
/**
* 停止screen状态监听
*/
public voidunregisterListener() {
mContext.unregisterReceiver(mScreenReceiver);
}
/**
* 启动screen状态广播接收器
*/
private voidregisterListener() {
IntentFilterfilter= newIntentFilter();
filter.addAction(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_USER_PRESENT);
mContext.registerReceiver(mScreenReceiver,filter);
}
public interfaceScreenStateListener{// 返回给调用者屏幕状态信息
public voidonScreenOn();
public voidonScreenOff();
public voidonUserPresent();
}
}
在上面的代码中,用到了动态注册广播,在需要监听屏幕状态的activity中直接调用,当不需要监听的时候,如activity finish的时候,使用unregisterListener解除广播监听;
下面是在Activity中调用;
ScreenListener screenListener = new ScreenListener(this) ;
screenListener.begin(new ScreenListener.ScreenStateListener() {
@Override
public void onScreenOn() {
Toast.makeText( CounterTActivity.this , "屏幕打开了" , Toast.LENGTH_SHORT ).show();
}
@Override
public void onScreenOff() {
Toast.makeText( CounterTActivity.this , "屏幕关闭了" , Toast.LENGTH_SHORT ).show();
}
@Override
public void onUserPresent() {
Toast.makeText( CounterTActivity.this , "解锁了" , Toast.LENGTH_SHORT ).show();
}
});