如何在启动画面被杀死时停止打开 activity

Question

我有闪屏。
一旦我打开我的应用程序，启动画面将在启动画面完成后出现，将 intent 传递给 HomeActivity。
但是当我在启动画面时关闭此应用程序时运行一段时间后主屏幕会自动打开，但我想关闭该应用程序。
但是当我终止应用程序时，主屏幕不应该显示。

public class SplashAnimation extends Activity {

    ImageView imageViewSplash;
    TextView txtAppName;
    RelativeLayout relativeLayout;
    Thread SplashThread;
    MediaPlayer mySong;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash_view);


        mySong=MediaPlayer.create(SplashAnimation.this,R.raw.monn);
        mySong.start();
        imageViewSplash = (ImageView) findViewById(R.id.imageViewSplash);
        txtAppName = (TextView) findViewById(R.id.txtAppName);
        relativeLayout = (RelativeLayout) findViewById(R.id.relative);

        startAnimations();
    }

    private void startAnimations() {

        Animation rotate = AnimationUtils.loadAnimation(this, R.anim.translate);
        Animation translate = AnimationUtils.loadAnimation(this, R.anim.translate);

        rotate.reset();
        translate.reset();
        relativeLayout.clearAnimation();

        imageViewSplash.startAnimation(rotate);
        txtAppName.startAnimation(translate);
        SplashThread = new Thread() {
            @Override
            public void run() {
                super.run();
                int waited = 0;
                while (waited < 3500) {
                    try {
                        sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    waited += 100;
                }
                SplashAnimation.this.finish();
                Intent intent = new Intent(SplashAnimation.this, LibraryView.class);
                intent.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
                startActivity(intent);
                mySong.stop();
            }
        };
        SplashThread.start();
    }

    @Override
    protected void onStop() {

        SplashAnimation.this.finish();
        finish();
        mySong.stop();
        super.onStop();
    }

    @Override
    protected void onDestroy() {
        finish();
        mySong.stop();
        super.onDestroy();
    }
}

Answer 1

调用 SplashThread.start() 后，它会尽其所能。我建议改用 Handler，您可以远程取消任务，处理程序运行：

//init and declare the handler instance
private Handler delayHandler;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (delayHandler == null) {
        delayHandler = new Handler();
    }
    //your code
}

//define the task the handler should do
private void startAnimations() {
//replace the code beginning at 'Thread SplashThread = new Thread()' with the following
delayhandler.postDelayed(new Runnable() {
    @Override
    public void run() {
        Intent intent = new Intent(SplashAnimation.this, LibraryView.class);
        //these flags will prevent to 'redo' the transition by hitting the back button, that also makes calling 'finish()' obsolete
        intent.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION | Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);            
        startActivity(intent);
    }
//instead of the while loop just execute the runnable after below given amount of milliseconds
}, 3500)

//to remotely cancel the runnable, if the app, respectively the Activity gets killed override 'onDestroy()'
@Override
public void onDestroy() {
    super.onDestroy();
    mySong.stop();
    //calling 'finish()' is obsolete, tho 'finish()' calls 'onDestroy()' itself
    //tell the handler to quit its job
    delayHandler.removeCallbacksAndMessages(null);
}

Answer 2

调用 onStop() 方法

SplashThread.interrupt()

Answer 3

您可以使用 Timer 而不是实例化线程 class。

参考下面的代码，4秒后开始Activity。在 SplashActivity 的 onCreate() 中使用它。

timer = new Timer().schedule(new TimerTask() {          
    @Override
    public void run() {
        startActivity(new Intent(getApplicationContext(), MainActivity.class));
    }
}, 4000);

在您的 onPause() 方法中使用：

timer.cancel()

这将终止计时器并忽略任何当前计划的任务。

如何在启动画面被杀死时停止打开 activity

how to stop open activity while splash screen killed

android

android-activity

android-handler

android-thread