I want to customize the activity back button in action bar, not in hard key back button. I have overriden the onBackPressed() method. It works with my emulator back button, but not with action bar back button.
I want it to happen with action bar. How can I do this?
Here is my code:
#Override
public void onBackPressed() {
Toast.makeText(getApplicationContext(),"Back button clicked", Toast.LENGTH_SHORT).show();
return;
}
I have used this toast whether back pressed is working or not but the actual implementation changes like to move back to previous activity. But this is not working with the button present on top of action bar (besides title of the activity).
Please any one could specify me the problem.
I think you want to override the click operation of home button. You can override this functionality like this in your activity.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
Toast.makeText(getApplicationContext(),"Back button clicked", Toast.LENGTH_SHORT).show();
break;
}
return true;
}
If you want ActionBar back button behave same way as hardware back button:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
onBackPressed();
return true;
}
return false;
}
Two things to keep in mind that the user can either press back button or press the actionbar home button.
So, if you want to redirect him to the same destination then you can do this.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
}
return false;
}
#Override
public void onBackPressed() {
super.onBackPressed();
Intent intent = new Intent(CurrentActivity.this, NextActivity.class);
startActivity(intent);
finish();
}
This will take the user to the intent pressing either key or the action bar button.
Sorry mine is a late answer, but for anyone else arriving at this page with the same question, I had tried the above:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
...
if (item.getItemId() == android.R.id.home) {
....
}
....
}
but this failed to catch the "Back" button press.
Eventually I found a method that worked for me on https://stackoverflow.com/a/37185334/3697478 which is to override the "onSupportNavigateUp()" as I am using the actionbar from the "AppCompatActivity" support library. (There is an equivalent "onNavigateUp()" for the newer actionbar/toolbar library.)
#Override
public boolean onSupportNavigateUp(){
finish();
return true;
}
and I removed the "android:parentActivityName=".MainActivity" section from the manifest file.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
break;
}
return true;
}
(1) Add Parent activity for your child activity (AndroidManifest.xml)
<activity
android:name=".ParentActivity" />
(2) override the onSupportNavigateUp method inside the child activity
#Override
public boolean onSupportNavigateUp() {
onBackPressed();
return false;
}
I have achieved this, by using simply two steps,
Step 1: Go to AndroidManifest.xml and in the add the parameter in tag - android:parentActivityName=".home.HomeActivity"
example :
<activity
android:name=".home.ActivityDetail"
android:parentActivityName=".home.HomeActivity"
android:screenOrientation="portrait" />
Step 2: in ActivityDetail add your action for previous page/activity
example :
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
}
return super.onOptionsItemSelected(item);
}
If you want to return to the previous instance of an Activity by pressing of ActionBar home button, without recreating it, you can override getParentActivityIntent method to use the one from the back stack:
#TargetApi(Build.VERSION_CODES.JELLY_BEAN)
#Override
public Intent getParentActivityIntent() {
return super.getParentActivityIntent().addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
}
EDIT:
Also you can achieve the same result by
setting the launchMode of your parent activity to singleTop.
So setandroid:launchMode="singleTop" to parent activity in your manifest.
Or you can use flag FLAG_ACTIVITY_CLEAR_TOP with the UP intent.
reference: Providing Up Navigation
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == android.R.id.home) {
onBackPressed();
return true;
}
//noinspection SimplifiableIfStatement
if (id == R.id.signIn) {
return true;
}
return super.onOptionsItemSelected(item);
}
///////////////////
#Override
public void onBackPressed() {
super.onBackPressed();
finish();
}
There are several ways how to set up back button in bar:
1) method .setDisplayHomeAsUpEnabled(true); will do it, and then you can simply override android.R.id.home
2) adding <meta-data android:name="android.support.PARENT_ACTIVITY" android:value="my.package.parrent" /> in Android Manifest, but in this case you can not override android.R.id.home in OnOptionsMenuSelected.
.. for those who wonder why it doesn't work for them...
Related
Below link in settings activity cannot go back when back button is pressed.
https://github.com/SadaqaWorks/Word-By-Word-Quran-Android/blob/master/app/src/main/java/com/sadaqaworks/quranprojects/activity/SettingsActivity.java
Code is given below...
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// handle arrow click here
if (item.getItemId() == android.R.id.home) {
finish(); // close this activity and return to preview activity (if there is any)`enter code here`
}
return super.onOptionsItemSelected(item);
}
nothing gets work. plz fix the code.
You may want to use finish() instead of System.exit(0).
And do not override onBackPressed().
I have a menu upside my page and it has an action item. like this:
action item
I set app:showAsAction="always" for it.
I have invisible view (in UI) in my page too.
I want to if I click on it, my invisible view appears. so I set a boolean parameter for that.
My boolean set true but my object doesn't appear at all. How can I fix it?
here is my code:
public static boolean myBoolean=false;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//this if doesn't check after change parameter
if(myBoolean)
findViewById(R.id.checkBox).setVisibility(View.VISIBLE);
}
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
switch (id) {
case R.id.action_setting: {
myBoolean=true;
return true;
}}}
What I am getting from this is you want to show a view based on the click of some menu item in action bar right?. if this is true then do like this.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.action_setting:
if(myBoolean){
findViewById(R.id.checkBox).setVisibility(View.GONE);
myBoolean = false;
}else{
findViewById(R.id.checkBox).setVisibility(View.VISIBLE);
myBoolean = true;
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
you can't decide the visibility earlier in your code since click may happen sometime after onCreate() only.
When i logout my app (press logout menu button) from second activity, then it redirect to login page but when i pressed back button again show second screen Activity, it should be goto main screen on back pressed, because i use finish() method but still not go to main screen. then what i do?
Here is my code.
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.second_adapter, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.logout_sec_Act) {
session.logoutUser();
finish();
Toast.makeText(Second_activity.this, "Logout...", Toast.LENGTH_LONG)
.show();
}
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
That is because your previous activity is still in the back stack of your task. One way to solve it is by moving to a new empty task when you logout, something like this:
Intent logoutIntent = new Intent(this, MainActivity.class);
logoutIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(logoutIntent);
I want to back to previous activity from the current activity.
So I added this code to the current activity
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
//super.onBackPressed();
//NavUtils.navigateUpFromSameTask(this);
this.finish();
return true;
}
return super.onKeyDown(keyCode, event);
}
But it doesn't fires at all.
What do I am missing?
Override the onOptionsItemSelected() method in your Activity :
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home: // the default resource ID of the actionBar's back button
Intent intent = new Intent(CurrentActivity.this, TargetActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
finish();
break;
}
return true;
}
You get the clicked menu item id using item.getItemId(),
then you check if it's equal to android.R.id.home, the default resource ID of the actionBar's back button.
The FLAG_ACTIVITY_CLEAR_TASK flag finishes all the old activities.
I'm using the ActionBar extending from the AppCompatActivity. How can I check, if the dropdown menu of the ActionBar is opened at the moment.
I've tried it in this method. But it does not fire if I open the drop down menu:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
Intent intent = new Intent();
Log.i("ActionBar", "ActionBar dropdown is open at this moment");
switch (item.getItemId()) {
case R.id.preferences:
intent.setClass(StartupActivity.this, PreferencesActivity.class);
startActivityForResult(intent, 0);
return true;
case R.id.info:
intent.setClass(StartupActivity.this, InformationActivity.class);
startActivityForResult(intent, 0);
return true;
case R.id.contact:
intent.setClass(StartupActivity.this, ContactActivity.class);
startActivityForResult(intent, 0);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
It only fires, if I click on an item of the drop down menu. But I want to check, if the user clicks on the three-dot menu.
Try the following method:
#Override
public boolean onMenuOpened(int featureId, Menu menu) {
// menu is open
return super.onMenuOpened(featureId, menu);
}
I've tried this method, it works:
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
// menu open
return super.onPrepareOptionsMenu(menu);
}
Even when initializing the menu, and not only when you click, but better than nothing.