动态注册广播接收者,屏幕锁定Android
1.AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.glsite.screenreceiver">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
2.ScreenReceiver
package com.glsite.screenreceiver;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
/**
* @author glsite.com
* @version $Rev$
* @des ${TODO}
* @updateAuthor $Author$
* @updateDes ${TODO}
*/
public class ScreenReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if ("android.intent.action.SCREEN_ON".equals(action)) {
Toast.makeText(context,"屏幕解锁啦", Toast.LENGTH_SHORT).show();
System.out.println("屏幕解锁啦");
} else if ("android.intent.action.SCREEN_OFF".equals(action)) {
Toast.makeText(context,"屏幕锁定啦,可以做清理缓存的操作啦", Toast.LENGTH_SHORT).show();
System.out.println("屏幕锁定啦,可以做清理缓存的操作啦");
}
}
}
3.MainActivity
package com.glsite.screenreceiver;
import android.content.IntentFilter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
private ScreenReceiver mScreenReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {//动态注册
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mScreenReceiver = new ScreenReceiver();
IntentFilter filter = new IntentFilter();//创建过滤器
filter.addAction("android.intent.action.SCREEN_ON");
filter.addAction("android.intent.action.SCREEN_OFF");
getApplicationContext().registerReceiver(mScreenReceiver, filter);
}
@Override
protected void onDestroy() {//反注册
unregisterReceiver(mScreenReceiver);
super.onDestroy();
}
}