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Fragment onKeyPress to listen onBackPress of attached Activity
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private void exitFragment(View v) { | |
//position click detail view in viewpager | |
int position = (int) v.getTag(); | |
//go back to pre layout'position of this detail view(mean original view) | |
runExitAnimation(v); | |
((PhotoView)v).animateTo(imageInfos.get(position), new Runnable() { | |
@Override | |
public void run() { | |
if (!ViewPagerFragment.this.isResumed()) {//fragment be destroyed or onPaused. | |
return; | |
} | |
final FragmentManager fragmentManager = getFragmentManager(); | |
if (fragmentManager != null) { | |
fragmentManager.popBackStack();//let fragment popBackstack | |
} | |
} | |
}); | |
} | |
private View.OnKeyListener pressKeyListener = new View.OnKeyListener() { | |
@Override | |
public boolean onKey(View v, int keyCode, KeyEvent event) { | |
if (keyCode == KeyEvent.KEYCODE_BACK) {//只监听返回键 | |
if (event.getAction() != KeyEvent.ACTION_UP) { | |
return true; | |
} | |
exitFragment(v); | |
return true; | |
} | |
return false; | |
} | |
}; | |
//NOTE:this is important to let the view get the focal point | |
view.setFocusableInTouchMode(true); | |
view.requestFocus(); | |
view.setOnKeyListener(pressKeyListener);//add key listener to listen back press |
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int position = (int) v.getTag() Why cast from object to int?