java - ANDROID onBackPressed 不适用于该 Activity

Question

我为我的 Activity 实现了 onBackPressed，它将检查互联网连接，但是当我点击平板电脑中的后退按钮时，它什么都不做。我不明白这是什么原因。可以帮忙吗？

下面是我的代码

if (!cd.isConnectingToInternet()) {
        AlertDialog.Builder splash = new AlertDialog.Builder(this);
        splash.setIcon(R.drawable.ic_fail)
                .setTitle("No Internet Connection")
                .setMessage(
                        "Please check your internet connection and try again.")
                .setCancelable(false)
                .setPositiveButton("Try again",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog,
                                    int id) {
                                Intent splash = new Intent(
                                        getApplicationContext(),
                                        SplashActivity.class);
                                startActivity(splash);
                                finish();
                            }
                        })
                .setNegativeButton("Wifi Setting",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog,
                                    int id) {
                                startActivity(new Intent(
                                        android.provider.Settings.ACTION_WIFI_SETTINGS));
                                dialog.cancel();
                            }
                        });
        AlertDialog alert = splash.create();
        alert.show();
    } else {
        Thread timer = new Thread() {
            public void run() {
                try {
                    sleep(5000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } finally {
                    Intent login = new Intent(getApplicationContext(),
                            LoginActivity.class);
                    startActivity(login);
                    finish();
                }
            }
        };
        timer.start();
    }
}

public void onRestart() {
    super.onRestart();
    Intent splash = new Intent(getApplicationContext(),
            SplashActivity.class);
    startActivity(splash);
}

@Override
public void onBackPressed() {
    super.onBackPressed();
    finish();
}

Answer 1

试试这段代码...

 @Override
        public void onBackPressed()
        {
            moveTaskToBack(true);
        }