仿三星解锁

三星I900滑动解锁看起来就像一层窗户纸，拉起纸来就能看到当前正在运行的activity程序，这是很有意思的。但其实现原理不可知，我们只能观测他的行为，根据掌握的可用API情况，推测他的实现代码。这里只是简单实现.算法原理呢,就是我们创建一个全透明的窗口,这样这个窗口就能全透顶层窗口下面的非激活窗口.然后在这个窗口上使用我们自定义的布局类,布局对象也行,布局成I900的样子,最后在我们的activity中移动这个布局对象.当然,有关滑动解锁还关系到大量的其他方面的技术,比如使用服务侦听锁屏广播,使用我们的窗口替换系统的锁屏窗口,屏掉按键,获取权限等一系列技术,这里不做详细解释,代码全都有.

MyLockActivity代码如下:

 <span xmlns="http://www.w3.org/1999/xhtml" style="">package com.mylock;

 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.util.DisplayMetrics;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.Window;
 import android.view.WindowManager;
 import android.widget.FrameLayout;

 import java.lang.reflect.Method;

 public class MyLockActivity extends Activity {
     FrameLayout RLayout;

     float o_X, o_Y, n_X, n_Y;

     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         Object service = getSystemService("statusbar");
         try {
             Class<?> statusBarManager = Class.forName("android.app.StatusBarManager");
             Method expand = statusBarManager.getMethod("disable", int.class);
             expand.invoke(service, 0x00000000);
         } catch (Exception e) {
             e.printStackTrace();
         }
         requestWindowFeature(Window.FEATURE_NO_TITLE);
         getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                 WindowManager.LayoutParams.FLAG_FULLSCREEN);
         getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
         getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
         getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);

         LayoutInflater inflater = getLayoutInflater();
         RLayout = (FrameLayout) inflater.inflate(R.layout.main, null);
         setContentView(RLayout);

         Intent mService = new Intent(MyLockActivity.this, MyLockServer.class);// ��������
         mService.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         startService(mService);
         // getWindow().setContentView(LayoutInflater.from(this).inflate(R.layout.main,
         // null));
         // setContentView(R.layout.main);
     }

     @Override
     public boolean onTouchEvent(MotionEvent event) {
         final int action = event.getAction();
         DisplayMetrics dm = new DisplayMetrics();
         getWindowManager().getDefaultDisplay().getMetrics(dm);
         int w = dm.widthPixels;
         int h = dm.heightPixels;
         switch (action) {
             case MotionEvent.ACTION_DOWN:
                 o_X = event.getX();
                 o_Y = event.getY();
                 break;
             case MotionEvent.ACTION_MOVE:
                 n_X = event.getX() - o_X;
                 n_Y = event.getY() - o_Y;
                 RLayout.layout((int) n_X, (int) n_Y, (int) n_X + w, (int) n_Y + h);
                 RLayout.invalidate();
                 if ((Math.abs(n_Y) > (h >> 1)) && (n_Y < 0)) {
                     this.finish();
                 }
                 break;
             case MotionEvent.ACTION_UP:
                 n_X = 0;
                 n_Y = 0;
                 RLayout.layout((int) 0, (int) 0, (int) 0 + 480, (int) 0 + 800);
                 RLayout.invalidate();
                 break;
             default:
                 break;
         }
         return super.onTouchEvent(event);
     }

     @Override
     public void onAttachedToWindow() {
         WindowManager.LayoutParams lp = getWindow().getAttributes();
         lp.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT; // 2010,2003,2004
         getWindow().setType(lp.type);

         super.onAttachedToWindow();
     }

     @Override
     public boolean dispatchKeyEvent(KeyEvent event) {
         // 返回true,不响应其他key
         return true;
     }

 }
 </span>

定义一个服务侦听系统广播,MyLockServer代码如下:

 <span xmlns="http://www.w3.org/1999/xhtml" style="">package com.mylock;

 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 MyLockServer extends Service {
     KeyguardManager mKeyguardManager = null;

     KeyguardLock mKeyguardLock = null;

     MyLockBroadcastReceiver mMasterResetReciever;

     Intent startIntent = null;

     @Override
     public IBinder onBind(Intent arg0) {
         // TODO Auto-generated method stub
         return null;
     }

     @Override
     public void onCreate() {
         // TODO Auto-generated method stub
         super.onCreate();
     }

     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
         onStart(intent, startId);
         return super.onStartCommand(intent, flags, startId);
     }

     @Override
     public void onStart(Intent intent, int startId) {
         // TODO Auto-generated method stub
         startIntent = intent;
         IntentFilter filter = new IntentFilter();
         filter.addAction(Intent.ACTION_SCREEN_ON);
         filter.addAction(Intent.ACTION_SCREEN_OFF);
         mKeyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
         mKeyguardLock = mKeyguardManager.newKeyguardLock("");
         mKeyguardLock.disableKeyguard();
         mMasterResetReciever = new MyLockBroadcastReceiver();
         registerReceiver(mMasterResetReciever, filter);
     }

     @Override
     public void onDestroy() {
         // TODO Auto-generated method stub
         unregisterReceiver(mMasterResetReciever);
         if (startIntent != null) {
             startService(startIntent);
         }
     }

     public class MyLockBroadcastReceiver extends BroadcastReceiver {
         @Override
         public void onReceive(Context context, Intent intent) {
             // TODO Auto-generated method stub
             try {
                 Intent i = new Intent();
                 i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                 i.setClass(context, MyLockActivity.class);
                 context.startActivity(i);
             } catch (Exception e) {
                 Log.i("Output:", e.toString());
             }
         }
     }

 }
 </span>

对应的XML文件AndroidManifest.xml内容如下:

 <span xmlns="http://www.w3.org/1999/xhtml" style=""><span xmlns="http://www.w3.org/1999/xhtml" style=""><?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.mylock"
     android:versionCode="1"
     android:versionName="1.0" >

     <uses-sdk android:minSdkVersion="10" />

     <application
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
         android:theme="@android:style/Theme.Translucent.NoTitleBar.Fullscreen" >
         <activity
             android:name=".MyLockActivity"
             android:label="@string/app_name"
             android:screenOrientation="portrait" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>

         <service android:name=".MyLockServer" />
     </application>

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

 </manifest></span></span>

漏了个ＸＭＬ文件,main.xml内容如下：

 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical" >
     <ImageView
         android:id="@+id/imageView1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:src="@drawable/qq" />

     <TextView
         android:id="@+id/textView1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:textSize="20dp"
         android:textColor = "#ff000000"
         android:text="@string/hello" />

 </FrameLayout>