Android 如何在回按时关闭正在运行的应用程序？

Question

How to exit from an app on back press of main activity? I am using this code, but its finish main activity and show other activities from back stack.

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

Answer 1

I tried this and its work for me really well,as I am working on app, where once session get expired, user is able to see only few views and remain hidden.

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

Answer 2

You can use

android:noHistory="true" in manifest under activity tag like this

    <activity 
        android:name=".MainActivity"
        android:noHistory="true">
    </activity>

Answer 3

Try this

@override
public void onBackPressed(){
Intent a = new Intent(Intent.ACTION_MAIN);
a.addCategory(Intent.CATEGORY_HOME);
a.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(a);
}

Answer 4

You can also try this,

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

Answer 5

You can try this one :

@Override
    public void onBackPressed() {
        // TODO Auto-generated method stub

        new AlertDialog.Builder(Activityname.this)
        .setTitle("Title")
        .setMessage("Do you really want to exit?")
        .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) { 
                ActivityCompat.finishAffinity(Activityname.this);
                finish();   
            }
        })
        .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) { 
                dialog.dismiss();
            }
        })
        .setIcon(android.R.drawable.ic_dialog_alert)
        .show();

    }

Hope it will solve your problem

Answer 6

Already asked . most popular answer:

getActivity().finish();
System.exit(0);

Answer 7

Hi try adding this code inside onBackPressed:

getActivity().finish();
System.exit(0);

Answer 8

@Override
public void onBackPressed() {

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Are you sure you want to Exit ?")
            .setCancelable(false)
            .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    moveTaskToBack(true);
                }
            })
            .setNegativeButton("No", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    dialogInterface.cancel();
                }
            });
    AlertDialog alertDialog = builder.create();
    alertDialog.show();
}

Answer 9

Try this,

Intent intent = new Intent(UserProfile.this, Login.class)
                            .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
finish();

Answer 10

try public void onBackPressed() { finish(); Intent intent = new Intent(Intent.ACTION_MAIN); intent.addCategory(Intent.CATEGORY_HOME); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); finish(); } public void onBackPressed() { finish(); Intent intent = new Intent(Intent.ACTION_MAIN); intent.addCategory(Intent.CATEGORY_HOME); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); finish(); }

use finish(); after migrating from one activity to another