P.S：我很清楚JSF的生命周期,但我是ADF的新手.所以你可以在这个前提下找到答案.

下次打开应用程序时会调用哪个Activity方法？在我因为没有检查自己而受到攻击之前,我在onCreate,onStart和onResume方法中有很多Log语句,但实际上在重新打开应用程序时,它们都没有显示在LogCat中.

如果您知道Force停止放置我的应用程序的状态的答案但是缺少的Log语句没有意义,请分享.我想除了我失去Force停止放置我的程序的地方之外可能会有一个不同的问题.

Android Activity LifeCycle：

的onCreate()

public void onCreate(Bundle savedInstanceState) {
    Log.i( TAG,"Whats going onnnn0" );
    // This calls all inherited methods,as this is a subclass of Activity.
    super.onCreate(savedInstanceState);
    if(D) Log.e(TAG,"+++ ON CREATE +++");
    Log.i( TAG,"Whats going onnnn" );


    // Set the view the main.xml
    setContentView(R.layout.main);
    RelayAPIModel.bluetoothConnected = false;
    // Initialize the connection.
    setupConnection();
    Log.i( TAG,"Whats going onnnn2" );

    // Check how if bluetooth is enabled on this device.
    mService.checkBluetoothState();
    // Initialize stuff from PilotMain() method
    initMain();
    Log.i( TAG,"Whats going onnnn3" );
    // Add listeners to all of the buttons described in main.xml
    buildButtons();
    Log.i( "HERE","HERE" );
    // If the adapter is null,then Bluetooth is not supported
    if (mService.getAdapter() == null) {
        Toast.makeText(this,R.string.toast_bt_not_avail,Toast.LENGTH_LONG).show();
        finish();
        return;
    }
    savedStuff = (SerializableObjects)LocalObjects.readobjectFromFile( getApplicationContext(),"LastDevice.txt" );
    if( savedStuff != null ) {
        hasLastDevice = true;
        Log.i( "HAS","LAST DEVICE" );
        Log.i( "HAS",savedStuff.getName() );
    } else {
        hasLastDevice = false;
        Log.i( "HAS NO","LAST DEVICE" );
    }

    pairedDeviceList = new ArrayList<BluetoothDevice>();
    pairedDevices = mService.getAdapter().getBondedDevices();

    for( BluetoothDevice device: pairedDevices ) {
        pairedDeviceList.add( device );
    }
    if( hasLastDevice ) {
        for( int i = 0; i < pairedDeviceList.size(); i++ ) {
            Log.i( "1 HERE HERE",pairedDeviceList.get( i ).getName() );
            Log.i( "1 HEUH?I@JD",savedStuff.getName() );
            if( pairedDeviceList.get( i ).getName().equals( savedStuff.getRealName() ) ) {
                // THIS IS THE DEVICE WE NEED
                prevIoUsDevice = pairedDeviceList.get( i );
                i = pairedDeviceList.size();
            }
        }
    }

}

在onStart()

public void onStart() {
    super.onStart();
    if(D) Log.e(TAG,"++ ON START ++");

    savedStuff = (SerializableObjects)LocalObjects.readobjectFromFile( getApplicationContext(),"LAST DEVICE" );
    }

    pairedDeviceList = new ArrayList<BluetoothDevice>();
    pairedDevices = mService.getAdapter().getBondedDevices();

    for( BluetoothDevice device: pairedDevices ) {
        pairedDeviceList.add( device );
    }
    if( hasLastDevice ) {
        for( int i = 0; i < pairedDeviceList.size(); i++ ) {
            Log.i( "2 HERE HERE",pairedDeviceList.get( i ).getName() );
            Log.i( "2 HEUH?I@JD",savedStuff.getName() );
            if( pairedDeviceList.get( i ).getName().equals( savedStuff.getRealName() ) ) {
                // THIS IS THE DEVICE WE NEED
                prevIoUsDevice = pairedDeviceList.get( i );
                i = pairedDeviceList.size();
            }
        }
    }


    // If BT is not on,request that it be enabled.
    // setupChat() will then be called during onActivityResult
    if (!mService.getAdapter().isEnabled()) {
        Log.i( TAG,"first !isEnabled " );
        Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableIntent,REQUEST_ENABLE_BT);
        Log.i( TAG,"second !isEnabled" );
    // Otherwise,setup the connection
    } else {
        if (mService == null) {
            Log.i( TAG,"setupConnection BEFORE" );
            setupConnection();
            Log.i( TAG,"setupConnection AFTER" );
        }
    }
}

的onResume()

public synchronized void onResume() {
    Log.i( "RESUME","HERE" );
    super.onResume();
    if(D) Log.e(TAG,"+ ON RESUME +");

    Log.i( "RESUME","AFTER HERE" );


    // Performing this check in onResume() covers the case in which BT was
    // not enabled during onStart(),so we were paused to enable it...
    // onResume() will be called when ACTION_REQUEST_ENABLE activity returns.
    if (mService != null) {
        // Only if the state is STATE_NONE,do we kNow that we haven''t started already
        if (mService.getState() == BluetoothService.STATE_NONE) {
          // Start the Bluetooth chat services
          mService.start();
        }
    }
}

因此,下次打开应用程序时,它会从头开始 – MainActivity.这就是强制停止“可能导致应用程序行为不端”的原因.你可能已经在做一些有用的事情中停止了它 – 比如写一个服务器/文件系统等等.这就是为什么你应该让你的应用程序尽可能高效或者以一种能够处理意外关闭的方式对它进行编码.这可能意味着远离长期任务并经常快速保存.