如果在Android中关闭了启动活动，如何使应用程序关闭

debugcn 发表于 Dev

阿克瑟·达米尔（Akshay Damle）

我有一个飞溅活动，在打开主活动之前会显示2秒钟。如果在显示启动活动时用户按下“后退”按钮，则启动活动将关闭。但是不久之后，主要活动（由飞溅活动触发）打开了。

我不希望这种情况发生。如果要在显示初始屏幕时按下“后退”按钮，我希望关闭整个应用程序。我该如何完成？

编辑：以下是我的启动活动代码：

    public class Splash2 extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // fullscreen
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);

        // fading transition between activities
        overridePendingTransition(R.anim.fadein, R.anim.fadeout);

        setContentView(R.layout.activity_splash2);
        Thread timer = new Thread() {
            public void run() {
                try {
                    sleep(1500);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } finally {
                    Intent open = new Intent(
                            "com.example.puzzletimer.HOMESCREEN");
                    startActivity(open);
                }
            }
        };
        timer.start();
    }

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

}

戈帕尔·戈皮

只需将此代码添加到您的SplashActivity ...

@Override
public void onBackPressed() {
    super.onBackPressed();
    android.os.Process.killProcess(android.os.Process.myPid());
}

或维护一个标志以确定是否在Thread中启动Activity ...

public class Splash2 extends Activity {

    private volatile boolean interrupt;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // fullscreen
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);

        // fading transition between activities
        overridePendingTransition(R.anim.fadein, R.anim.fadeout);

        setContentView(R.layout.activity_splash2);
        Thread timer = new Thread() {
            public void run() {
                try {
                    sleep(1500);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } finally {
                    if (!interrupt) {
                        Intent open = new Intent(
                                "com.example.puzzletimer.HOMESCREEN");
                        startActivity(open);
                    }
                }
            }
        };
        timer.start();
    }

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

    @Override
    public void onBackPressed() {
        super.onBackPressed();
        interrupt = true;
    }
}

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