CODEWITHSUNDEEP
androidandroid-activity
Zohaib
Zohaib

Reputation: 41

How to add session in android application?

I'm making an android application in which there are different activities connected to Home (MainActivty) activity and vice-verse. I want to close my application whenever i press back key from home activity. But it takes me to previous activity where it is came from. how can i do this. Please someone help me in this, i'm new to android. Thanks.............

Here is my code:

  btn_daily.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {

            Intent i = new Intent(getApplicationContext(), ActivityA.class);
            startActivity(i);
        }
    });

    btn_health.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {

            Intent i = new Intent(getApplicationContext(), ActivityB.class);
            startActivity(i);
        }
    });

    btn_diet.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {

            Intent i = new Intent(getApplicationContext(), ActivityC.class);
            startActivity(i);
        }
    });

    btn_exercise.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {

            Intent i = new Intent(getApplicationContext(), ActivityD.class);
            startActivity(i);
        }
    });

    btn_yoga.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {

            Intent i = new Intent(getApplicationContext(), ActivityE.class);
            startActivity(i);
        }
    });

    btn_help.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {

            Intent i = new Intent(getApplicationContext(), ActivityF.class);
            startActivity(i);
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}


public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        dialogOnBackPress();

        return true;
    }
    return super.onKeyDown(keyCode, event);
}

protected void dialogOnBackPress() {

    new AlertDialog.Builder(this)
            .setTitle("Exit Alert !!")
           .setMessage("Are you sure you want to exit?")
           .setCancelable(false)
           .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
               public void onClick(DialogInterface dialog, int id) {
                    finish();
               }
           })
           .setNegativeButton("No", null)
           .show();

}

Upvotes: 0

Views: 65

Answers (3)

Ravi Bhatt
Ravi Bhatt

Reputation: 1948

It seems that activities other then MainActivity, has also some mechanism to navigate to other activities. So while navigating to other activity, don't forget to use finish() to destroy that current activity.

And if your application has other mechanism like there is some home button which takes you to home screen from any navigation activity, then at that time open MainActivity with FLAG_ACTIVITY_CLEAR_TOP flag.

Hence by doing so, you will not have back stack of extra activity and back button from MainActivity will close the app.

EDIT : For scenario you have mentioned in the comment, you have to use following code on Home button click.

 btn_home.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View view) {

        Intent i = new Intent(CurrentActivity.this, MainActivity.class);
        i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(i);
        finish();
    }
});

Upvotes: 1

Coder
Coder

Reputation: 186

Use this line in onBackPressed method..

startActivity(new Intent(currentActivity.this,HomeActivity.class"));
finish();

Upvotes: 0

Kaustubh
Kaustubh

Reputation: 653

I think it is because you have not added intent flags try this

new AlertDialog.Builder(this)
        .setTitle("Exit Alert !!")
       .setMessage("Are you sure you want to exit?")
       .setCancelable(false)
       .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {

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

Upvotes: 0

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