Android 屏幕保护程序制作及源码

首先，需要启动一个后台服务，用于注册一个BroadcastReceiver

 

这个BroadcastReceiver用于监听Intent.ACTION_SCREEN_OFF

 

这样在发生这个事件Intent.ACTION_SCREEN_OFF 也就是用户锁屏或者屏幕上锁时触发。

 

Service中注册BroadcastReceiver代码

package com.pingbao;import android.app.KeyguardManager;import android.app.Service;import android.app.KeyguardManager.KeyguardLock;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.IBinder;import android.util.Log;public class ZyScreenService extends Service {KeyguardManager mKeyguardManager = null;private KeyguardLock mKeyguardLock = null;@Overridepublic IBinder onBind(Intent arg0) {// TODO Auto-generated method stubreturn null;}@Override public void onCreate() { // TODO Auto-generated method stub super.onCreate(); } @Override public void onStart(Intent intent, int startId) { // TODO Auto-generated method stub Log.i("in Service","in Service");mKeyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);mKeyguardLock = mKeyguardManager.newKeyguardLock("");mKeyguardLock.disableKeyguard();Log.i("in Service1","in Service1");BroadcastReceiver mMasterResetReciever = new BroadcastReceiver() {public void onReceive(Context context, Intent intent) {try {Intent i = new Intent();i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);i.setClass(context, ZyScreenSaver.class);context.startActivity(i);// finish();Log.i("BroadcastReceiver","BroadcastReceiver");} catch (Exception e) {Log.i("Output:", e.toString());}}};registerReceiver(mMasterResetReciever, new IntentFilter(Intent.ACTION_SCREEN_OFF)); }} 

 

然后在我们启动的ZyScreenSaver这个屏保界面Activity里写上

package com.pingbao;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.content.DialogInterface;import android.content.Intent;import android.content.DialogInterface.OnClickListener;import android.os.Bundle;import android.util.Log;import android.view.KeyEvent;import android.view.Window;import android.view.WindowManager;import android.widget.ArrayAdapter;public class ZyScreenSaver extends Activity {@Overridepublic 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);Log.i("MyScreenSaver", "MyScreenSaver");}public boolean onKeyDown(int keyCode, KeyEvent event) {super.onKeyDown(keyCode, event);if (keyCode == KeyEvent.KEYCODE_BACK) {Log.i("4", "4");showDialog(1);}// finish();return true;}protected Dialog onCreateDialog(int id) {switch (id) {case 1:return new AlertDialog.Builder(ZyScreenSaver.this).setIcon(R.drawable.icon).setTitle("退出屏保").setMessage("是否退出屏保").setPositiveButton("确定",new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub finish();}}).setNegativeButton("取消",new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubremoveDialog(1); }}).create();}return null;}}

 

然后在我们的主界面里写上启动服务就可以了

 

package com.pingbao;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.util.Log;import android.view.Window;import android.view.WindowManager;public class Zypingbao extends Activity {/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);Log.i("pingbao","pingbao");Intent mService=new Intent(Zypingbao.this,ZyScreenService.class);//启动服务mService.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);startService(mService);}} 

 

在Manifest里贴权限

 

<uses-permission android:name="android.permission.DISABLE_KEYGUARD" /> 

 

源码下载

http://download.csdn.net/source/2996510

 

 

如果实在要屏蔽home键 还有一种办法 就是

public void onAttachedToWindow() {this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);super.onAttachedToWindow();} 

这样在

public boolean onKeyDown(int keyCode, KeyEvent event)

函数里就能监听到home了

 

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http://blog.csdn.net/Zengyangtech/archive/2011/01/21/6157508.aspx

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