finish activity when back button twice pressed?
Solution 1
Ok...here is a longer, but effective way of doing this...
1) Make a global vairable in your class like...
private boolean backPressedToExitOnce = false;
private Toast toast = null;
2) Then implement onBackPressed of activity like this...
@Override
public void onBackPressed() {
if (backPressedToExitOnce) {
super.onBackPressed();
} else {
this.backPressedToExitOnce = true;
showToast("Press again to exit");
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
backPressedToExitOnce = false;
}
}, 2000);
}
}
3) Use this trick to handle this toast efficiantly...
/**
* Created to make sure that you toast doesn't show miltiple times, if user pressed back
* button more than once.
* @param message Message to show on toast.
*/
private void showToast(String message) {
if (this.toast == null) {
// Create toast if found null, it would he the case of first call only
this.toast = Toast.makeText(this, message, Toast.LENGTH_SHORT);
} else if (this.toast.getView() == null) {
// Toast not showing, so create new one
this.toast = Toast.makeText(this, message, Toast.LENGTH_SHORT);
} else {
// Updating toast message is showing
this.toast.setText(message);
}
// Showing toast finally
this.toast.show();
}
4) And use this trick to hide toast when you activity is closed...
/**
* Kill the toast if showing. Supposed to call from onPause() of activity.
* So that toast also get removed as activity goes to background, to improve
* better app experiance for user
*/
private void killToast() {
if (this.toast != null) {
this.toast.cancel();
}
}
5) Implement you onPause() like that, to kill toast immidiatly as activity goes to background
@Override
protected void onPause() {
killToast();
super.onPause();
}
Hope this will help...:)
Solution 2
Use boolean to check if the button is pressed twice
boolean isFinsihActivity = false;
@Override
public void onBackPressed() {
if (isFinsihActivity) {
super.onBackPressed();
}
isFinsihActivity = true;
}
Solution 3
I think this is the correct way is to wait for second back
private boolean _doubleBackToExitPressedOnce = false;
@Override
public void onBackPressed() {
Log.i(TAG, "onBackPressed--");
if (_doubleBackToExitPressedOnce) {
super.onBackPressed();
return;
}
this._doubleBackToExitPressedOnce = true;
Toast.makeText(this, "Press again to quit", Toast.LENGTH_SHORT).show();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
_doubleBackToExitPressedOnce = false;
}
}, 2000);
}
This works for me... answer taken from here
Aristo Michael
Having 9+ years of exp. in Android application development. Currently working in Samsung India Electronics Pvt. Ltd.
Updated on June 11, 2022Comments
-
Aristo Michael almost 2 years
I am creating an application here i need to finish activity when user twice pressed back button. Here is my code what i tried
@Override public void onBackPressed() { super.onBackPressed(); this.finish(); }
tried this too
@Override public boolean onKeyDown(int keyCode, KeyEvent event) { if ((keyCode == KeyEvent.KEYCODE_BACK)) { finish(); } return super.onKeyDown(keyCode, event); }
this helps me to finish activity once back button pressed.
Pls i need your suggestion. Thanks in advance