从片段关闭应用程序会导致返回到父活动

Question

I tried several ways to end application from inside of a fragment, like:

system.exit(1)
android.os.Process.killProcess(android.os.Process.myPid());
getActivity().finish();

and it is all of fragment code;Exit code put on exitDialog.setPositiveButton oncliklistener that in my try cuse backing to parent activity instead exit

package com.TB.mylistprojct;

import android.os.Bundle;
import android.app.AlertDialog;
import android.app.Fragment;
import android.content.DialogInterface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
public class ActFooter extends Fragment
{
    View            EMyView         =null;

    Button          BtnExit         =null;
@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
}

@Override
public View onCreateView(LayoutInflater Inflater,ViewGroup Container,Bundle SavedInstanceState)
{
    View MyView=Inflater.inflate(R.layout.actfooter, Container,false);
    EMyView=MyView;
    InitialUI();
    return MyView;
}

public void InitialUI()
{
    BtnExit=(Button)EMyView.findViewById(R.id.Btn_exit);
    BtnExit.setOnClickListener(BtnExit_OnClick);
}

public OnClickListener BtnExit_OnClick=new OnClickListener()
{

    @Override
    public void onClick(View arg0)
    {
        AlertDialog.Builder exitDialog=new AlertDialog.Builder(getActivity());

        exitDialog.setTitle("Warning");
        exitDialog.setMessage("Exit Program");
        exitDialog.setPositiveButton("YSE", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface arg0, int arg1)
            {
                // Exit Code PUT Here
            }
        });
        exitDialog.setNegativeButton("NO", null);
        exitDialog.show();
    }
};
}

But the app returns to the parent activity

Answer 1

try this:

getActivity().moveTaskToBack(true); 
getActivity().finish();

Answer 2

Finally i find the solution

first i add fllowing code in fragment

Intent intent = new Intent(getActivity(), ACTMain.class);
                intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                intent.putExtra("LOGOUT", true);
                startActivity(intent);

                getActivity().finish();

and in main activity(in onCreate function) i check status with if statement and exit :)

        if (getIntent().getBooleanExtra("LOGOUT", false))
    {
        finish();
    }

Answer 3

Recently I was having the same issue with my app. I used two exit button one in main activity other one in a fragment

For main activity:- first I create a button in main activity.xml file with onClick attributes then in java I used:

Inside MainActivity.java:

For Fragment:- I use setOnClickListener : Inside HomeFragment.java:

Below is the code which works for me for fragment inside MainActivity.java

public void clickExit(View v){
finish();
}

inside Fragment.java

button_2=(Button) view.findViewById(R.id.home_exit_btn);
    button_2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(getActivity(), "Closing application...",   Toast.LENGTH_SHORT).show();
                getActivity().finish();
            }
        });
        return view;
    }

Answer 4

This work very well for me (all go in the Activity that have the fragment container):

private void backStack(){
    if(getSupportFragmentManager().getBackStackEntryCount()>1){
        getSupportFragmentManager().popBackStack();
    }else
    if(getSupportFragmentManager().getBackStackEntryCount()==1){
        this.finish();
    }
}

you must use this code in here:

@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
    boolean back = false;
    if(keyCode == KeyEvent.KEYCODE_BACK){
        back = true;
        backStack();
    }
    return back;

}

Answer 5

The app will only exit if there are no activities in the back stack. So, add android:noHistory="true" to all the activities(which you don't want to be back stacked) in your manifest file. And, then to close the app call the finish() in the OnBackPressed() method.

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

Answer 6

you can use .....

if(keyCode == KeyEvent.KEYCODE_BACK)
{
   getActivity().moveTaskToBack(true);
}

Answer 7

Apart from :

getActivity().finish()

This also worked for me :

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

Answer 8

I had the same problem today and i tried this code and it worked fine for me and i hope will word for everyone.

put this code in fragment
Intent intent = new Intent(fragment_name.this, MainActivity_name.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            intent.putExtra("LOGOUT", true);
            startActivity(intent);
            fragment_name.this.finish();

and put this code inside onCreate function

    if (getIntent().getBooleanExtra("LOGOUT", false))
        {
            finish();
            System.exit(0);
        }

thanks to @HamidTB :)

Answer 9

You Just need to hold the instance of the parent activity in your fragment to call it's functions like in this case function is to close the app so just in your fragment type

syntax is -> referencesObj = activity cast as "parentClass"

kotlin -> val parentActivity = activity as MainActivity
Java   -> MainAcitivity parentAcitivity = (MainActivity) getActivity();

and then just use it's function like finish():

parentActivity.finish()