I have one main activity and one preferenceActivity. On my first activity I call menu and go on preferenceActivity by calling startActivityForResult.
case R.id.settings:
startActivityForResult(new Intent(this, SettingsActivity.class), LAUNCH_SETTINGS);
return true;
Then I change my settings and want to return on main activity and see main activity with new settings applyed. In onPause() method do following (as I right understand this method will be called when I press back button, right?)
@Override
protected void onPause() {
super.onPause();
setResult(RESULT_OK, new Intent(this, MainActivity.class));
finish();
}
On main activity
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == LAUNCH_SETTINGS) {
if (resultCode == RESULT_OK) {
new RefreshList().execute(ACTION_SELECT);开发者_StackOverflow
Log.d(TAG, "On activity result");
}
}
}
But my acyncTask do not called and log not printed. How correctly I can do this? Thanks!
On my first activity I call menu and go on preferenceActivity by calling startActivityForResult.
Using startActivityForResult()
with a PreferenceActivity
is rather unusual. PreferenceActivity
is designed to be used with startActivity()
. If the one starting the PreferenceActivity
cares about preference changes, it should register a preference change listener with the SharedPreferences
object.
Then I change my settings and want to return on main activity and see main activity with new settings applyed.
I recommend that you use a SharedPreferences.OnSharedPreferenceChangeListener
instead. Or, simply re-read the preferences you care about in the original activity's onStart()
or onResume()
method.
In onPause() method do following (as I right understand this method will be called when I press back button, right?)
No, that will not work. onPause()
is too late to call setResult()
.
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