要求:

启动应用后灭屏.然后power按键亮屏之后显示应用界面不是锁屏界面.

方法:

屏蔽锁屏界面,这个功能只在滑动锁屏有效,谷歌估计考虑到安全问题,没有放开权限,毕竟3方应用并不可靠.

方法1

//在oncreate方法加
        final Window win = getWindow();
        final WindowManager.LayoutParams params = win.getAttributes();
        params.flags |= WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
                | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD;

方法2
以前的方法,由于KeyguardLock应该过时,建议上面的方法,而且使用KeyguardLock方法,还要考虑退出的时候要把锁屏还原.

    KeyguardManager mKeyguardManager;
    KeyguardManager.KeyguardLock mKeyguardLock;
    public void controlKeyguard(boolean enable) {
        if (true) return;
        if (mKeyguardManager == null || mKeyguardLock == null) {
            mKeyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
            mKeyguardLock = mKeyguardManager.newKeyguardLock("FxLock");
        }

        if (enable) {
            mKeyguardLock.reenableKeyguard();
        } else {
            mKeyguardLock.disableKeyguard();
        }
        Log.i("wangcan", enable ? "reenableKeyguard" : "disableKeyguard");
    }

如果要设置后台启动,方法2 需要在服务里面监听亮屏广播,然后启动界面.下面启动用方法1,Systemui(9.0)的滑动锁屏要先一步启动,8.1 甚至需要滑动解锁才会进入应用界面

public class ScreenOnService extends Service {
    private BroadcastReceiver powerOnOffReceiver;
    KeyguardManager mKeyguardManager;
    KeyguardManager.KeyguardLock mKeyguardLock;
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return super.onStartCommand(intent, flags, startId);
    }
    @Override
    public void onCreate() {
        super.onCreate();
        powerOnOffReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                if (intent.getAction().equals("android.intent.action.SCREEN_ON")) {
                    Log.i("wangcan", "startActivity");
                    Intent lockIntent = new Intent(context, MainActivity.class);
                    lockIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(lockIntent);
                } else if (intent.getAction().equals("android.intent.action.SCREEN_OFF")) {
                    //屏蔽手机内置的锁屏
                    controlKeyguard(false);
                    //启动该第三方锁屏
                }
            }
        };
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("android.intent.action.SCREEN_ON");
        intentFilter.addAction("android.intent.action.SCREEN_OFF");
        registerReceiver(powerOnOffReceiver, intentFilter);
    }

    public void controlKeyguard(boolean enable) {
        if(mKeyguardManager==null || mKeyguardLock ==null){
            mKeyguardManager = (KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE);
            mKeyguardLock = mKeyguardManager.newKeyguardLock("FxLock");
        }

        if (enable) {
            mKeyguardLock.reenableKeyguard();
        } else {
            mKeyguardLock.disableKeyguard();
        }
        Log.i("wangcan", enable ? "reenableKeyguard" : "disableKeyguard");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        controlKeyguard(true);
        unregisterReceiver(powerOnOffReceiver);
    }
}