android仿三星I900滑动解锁

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:

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;
    }

}

定义一个服务侦听系统广播,MyLockServer代码如下:

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());
            }
        }
    }

}

对应的XML文件AndroidManifest.xml内容如下:

漏了个ＸＭＬ文件,main.xml内容如下：

效果如下:

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