Android back button app is not closing

Question

i am using the below code for back button but it cant work it does not exit the app if i am pressing the back button of userdevice

  private Boolean exit = false;

        @Override
        public void onBackPressed() {
            if (exit) {
                this.finish(); // finish activity
            } else {
                Toast.makeText(this, "Press Back again to Exit.",
                        Toast.LENGTH_SHORT).show();
                exit = true;
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        exit = false;
                    }
                }, 3 * 1000);

            }

        }

Possible duplicate of [Clicking the back button twice to exit an activity](http://stackoverflow.com/questions/8430805/clicking-the-back-button-twice-to-exit-an-activity) — Wilson Christian, Apr 03 '17 at 09:19
You probably have other activities, closing one of them doesn't mean closing an application. — Flot2011, Apr 03 '17 at 09:23

score 2 · Answer 1 · answered May 09 '17 at 04:24

private Boolean exit = false;

        @Override
        public void onBackPressed() {
            if (exit) {
                this.finishAffinity();
            } else {
                Toast.makeText(this, "Press Back again to Exit.",
                        Toast.LENGTH_SHORT).show();
                exit = true;
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        exit = false;
                    }
                }, 3 * 1000);

            }

        }

score 0 · Answer 2 · answered Apr 03 '17 at 09:22

use this...

private long lastBackPressTime = 0;

     @Override
    public void onBackPressed() {

        if (this.lastBackPressTime < System.currentTimeMillis() - 4000) {

            //Add Snhackbar or Toast, whatever you want
            this.lastBackPressTime = System.currentTimeMillis();

        } else {
            if (toast != null) {
                toast.cancel();
            }
            moveTaskToBack(true);

        }

    }

John Joe · Answer 3 · 2017-04-03T09:31:03.560

This may work. Use finishAffinity() instead.

  boolean doubleBackToExitPressedOnce = false;

  public void onBackPressed(){
        if(doubleBackToExitPressedOnce)
        {
            finishAffinity();
            return;
        }

        this.doubleBackToExitPressedOnce = true;
        Toast.makeText(this, "Please click back again to exit", Toast.LENGTH_SHORT).show();

        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                doubleBackToExitPressedOnce = false;

            }
        },3500);
    }

score 0 · Answer 4 · answered Apr 03 '17 at 09:30

keep a boolean toClose=false; and in onBackPressed() method use this code

if (toClose)
    super.onBackPressed();
    else
    {
        toClose=true;
        Utils.showToast(context,getString(R.string.back_again));
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                toClose=false;
            }
        },2000);
    }

score 0 · Accepted Answer · answered Apr 03 '17 at 09:30

Change Your Code Like This.

 private Boolean exit = false;

            @Override
            public void onBackPressed() {
                if (exit) {
                    this.finishAffinity();
                } else {
                    Toast.makeText(this, "Press Back again to Exit.",
                            Toast.LENGTH_SHORT).show();
                    exit = true;
                    new Handler().postDelayed(new Runnable() {
                        @Override
                        public void run() {
                            exit = false;
                        }
                    }, 3 * 1000);

                }

            }

Vinod Pattanshetti · Answer 6 · 2017-04-03T09:58:40.810

This will work for you Define this it globally

private boolean doubleBackToExitProceed = false;
@Override
  public void onBackPressed() {
    if (doubleBackToExitProceed) {
      finish();
      return;
    }
    doubleBackToExitProceed = true;
    Toast.makeText(this, "Press Back again to Exit.", Toast.LENGTH_SHORT).show();

    new Handler().postDelayed(new Runnable() {

      @Override
      public void run() {
        doubleBackToExitProceed = false;
      }
    }, 2000);// time in milliseconds.
  }

score 0 · Answer 7 · answered Apr 03 '17 at 09:47

Use this to close the app on pressing back button.

@Override
    public void onBackPressed() {

            Intent intent = new Intent(Intent.ACTION_MAIN);
            startMain.addCategory(Intent.CATEGORY_HOME);
            startActivity(intent);
        }

Android back button app is not closing

7 Answers7