android 屏幕保持唤醒 不锁屏

方法一：

public class UnLockActivity2 extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }   
}

方法二：

public class UnLockActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        PowerManager pm = (PowerManager)getSystemService(POWER_SERVICE);
        m_wklk = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, "cn");
        
        m_wklk.acquire();
    }

    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        m_wklk.release();
    }

    @Override
    protected void onPause() {
        // TODO Auto-generated method stub
        super.onPause();
        
        m_wklk.release();
    }

    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
        
        PowerManager pm = (PowerManager)getSystemService(POWER_SERVICE);
        m_wklk = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, "cn");
        m_wklk.acquire();
    }
  
    WakeLock m_wklk; 
}

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

参考：

http://dourok.info/wiki/doku.php/%E7%BC%96%E7%A0%81/android/%E4%BF%9D%E6%8C%81%E5%B1%8F%E5%B9%95%E5%94%A4%E9%86%92

http://www.cnblogs.com/king_dy/archive/2010/11/11/1888134.html

http://carywei.iteye.com/blog/770445