CODEWITHSUNDEEP
android
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Reputation: 157

Android overriding onBackPressed() to send intent

I am trying to override onBackPressed() to send data to the previous screen in an intent like so;

    thisUserObj = (User) getIntent().getSerializableExtra("UserObj");


    Intent intent = new Intent();
    intent.putExtra("UserObj", thisUserObj);
    setResult(RESULT_OK, intent);

but when the button is pressed the UserObj values is null, however this works from a onClickListener

    Intent intent = new Intent(getApplication(), MainMenuActivity.class);
    intent.putExtra("UserObj", thisUserObj);
    startActivity(intent);

Upvotes: 0

Views: 1457

Answers (2)

seema
seema

Reputation: 991

Its startActivity(intent). To get result in onActivityResult(), it should be startActivityForResult().

Upvotes: 5

Mina Fawzy
Mina Fawzy

Reputation: 21452

in First activity 

public static final int REQUEST_CODE = 100;
....

Intent intent=new Intent(MainActivity.this, MainMenuActivity.class);
intent.putExtra("UserObj", thisUserObj);  
startActivityForResult(intent, REQUEST_CODE); 


// still in first activity 

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // Check which request we're responding to
    if (requestCode == REQUEST_CODE) {
        // Make sure the request was successful
        if (resultCode == RESULT_OK) {
         // do your stuff here            

        }
    }
}

in your second activity in your case MainMenuActivity class

thisUserObj = (User) getIntent().getSerializableExtra("UserObj");

Intent intent = new Intent();
intent.putExtra("UserObj", thisUserObj);
setResult(RESULT_OK, intent);
finish();

to override back pressed button

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_BACK)) { //Back key pressed
       //Things to Do
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

Upvotes: 0

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