监听屏幕SCREEN_ON和SCREEN_OFF这两个action,实现屏幕锁定状态的监听，从而实现自己的锁屏效果，奇怪的是，这两个action只能通过代码的形式注册，才能被监听到，使用AndroidManifest.xml 完全监听不到。查了一下，发现这是PowerManager那边在发这个广播的时候，做了限制，限制只能有register到代码中的receiver才能接收。
package com.lock.muskmelon;
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
public class Lock8secondActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final String TAG = null;
final IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_USER_PRESENT);
final BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver() {
@Override
public void onReceive(final Context context, final Intent intent) {
String action = intent.getAction();
if(Intent.ACTION_SCREEN_ON.equals(action))
{
Log.d(TAG, "screen is on...");
}
else if(Intent.ACTION_SCREEN_OFF.equals(action))
{
Log.d(TAG, "screen is off...");
}
else if(Intent.ACTION_USER_PRESENT.equals(action))
{
Log.d(TAG, "screen is unlock...");
}
}
};
registerReceiver(mBatInfoReceiver, filter);
}
}
