CODEWITHSUNDEEP
androidfragmentback-button
Urchin
Urchin

Reputation: 474

Android Back button return previous, but exit the app

Override this function, it return previous page, but at same time it will exit the app. Just press the back button once, anyone can help me solve this problem. Use V4 slide fragment.

public void onBackPressed() {
    moveTaskToBack(true);

    if (mViewPager.getCurrentItem() == 0) {
        super.onBackPressed();
    } else {

        mViewPager.setCurrentItem(mViewPager.getCurrentItem() - 1);
    }

Upvotes: 0

Views: 890

Answers (3)

Carlos J
Carlos J

Reputation: 3045

moveTaskToBack(true) is the responsible for closing your app, if you only want your app to close when you are on the first page of your 'ViewPager' try moving it inside the if statement.

Something like this:

public void onBackPressed() {

    if (mViewPager.getCurrentItem() == 0) {
        moveTaskToBack(true);
    } else {
        mViewPager.setCurrentItem(mViewPager.getCurrentItem() - 1);
    }
}

Upvotes: 1

AlizerA
AlizerA

Reputation: 164

try this at Activity: 

System.exit(1);

or at other classes you can use this:

context.System.exit(1);

Upvotes: 0

Huy Tower
Huy Tower

Reputation: 7966

You need use addToBackStack

public void showFragment(View v) {
FragmentA f = new FragmentA();

FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.container, f, tag);
ft.addToBackStack(tag);
ft.commit();
}

@Override
public void onBackPressed() {
    FragmentManager fm = getSupportFragmentManager();
    if (fm.getBackStackEntryCount() > 0) {
        fm.popBackStack();
    } else {
        super.onBackPressed();
    }
}

Upvotes: 0

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