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
I have an activity that when the user press back arrow doing some thing.
When you press the back button on the phone, it does the finish () method, but it doesn't happen when you press the back arrow. How to fix it?
I'm sorry for the grammatical errors. I would be happy if you remind me of the bad ones.
are you looking for
Xamarin.Android:
public override void OnBackPressed()
{
// do something on backbutton pressed
}
Java:
#Override
public void onBackPressed()
{
// code here to show dialog
super.onBackPressed(); // optional depending on your needs
}
If you want the same behavior for the back button. Add this code.
Java Code
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
if (item.getItemId() == android.R.id.home) {
YourActivity.this.onBackPressed();
}
return super.onOptionsItemSelected(item);
}
Kotlin Code
override fun onOptionsItemSelected(item: MenuItem): Boolean {
if (item.itemId == android.R.id.home) {
this#YourActivity.onBackPressed()
}
return super.onOptionsItemSelected(item)
}
I'm working on an android app and recently, I discovered that the default back button onBackPressed() produces a back behaviour, while the getSupportActionBar().setDisplayHomeAsUpEnabled(true) produces an up behaviour. And the two have significant differences.
I was wondering if I can simulate the up behaviour when I press the hardware back button, so that it navigates up instead of back.
Thanks.
You can do this.
#Override
public void onBackPressed() {
NavUtils.navigateUpFromSameTask(this);
}
You can do this
Overide onOptionsItems Selected
Create a switch case of android.R.id.home
Call method onBackPressed();
here is the code
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
default:
return super.onOptionsItemSelected(item);
}
}
I am working on animating an element between two activities using code like this:
Pair<View, String> pair1 = Pair.create(sharedView, transitionName);
Pair<View, String> pair2 = Pair.create(sharedBackgroundView, transitionBackgroundName);
ActivityOptionsCompat transitionActivityOptions = ActivityOptionsCompat.makeSceneTransitionAnimation(MainActivity.this, pair1, pair2);
startActivity(myIntent, transitionActivityOptions.toBundle());
This works great when I`m using phone's back button to get back tot the initial activity, but when I use back button from the Action Bar the transition animation is no longer present. I there any work around for it?
The problem can be seen in the following clip, first time I use phone on screen back button and second time I use Back button form the Action Bar.
https://www.youtube.com/watch?v=Wtdcw2fGBTg
Here is better solution I'm using.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
finishAfterTransition();
return true;
}
return false;
}
Note: finishAfterTransition() call requires Minimum API Level 21.
Intercept the click on home button and call the super onBackPressed()
#Override
public boolean onOptionsItemSelected(android.view.MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onClickHome();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
protected void onClickHome() {
super.onBackPressed();
}
This question already has answers here:
"Back" button on Action bar - Android . How to go "back"?
(2 answers)
Closed 7 years ago.
I tried with this but nothing happens.
#Override
public void onBackPressed() {
super.onBackPressed();
Log.d("TEST", "Pressed the Back button.");
}
Back button oin action bar is Menu item with id android.R.id.home. Here is how you can handle click on up item:
#Override
public boolean onOptionsItemSelected(MenuItem item){
switch(item.getItemId()){
case android.R.id.home:
// do something useful
return true;
}
return super.onOptionsItemSelected(item);
}
OnBackPressed Doesn´t refer to that button but to the button on the bottom of your screen (the one next to home)
what you are looking for is to customize behavoiour on the home button
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
//TODO log here
return true;
}
return super.onOptionsItemSelected(item);
}`
I want to add a new button to the ActionBar. When I click it, it does a specific Action. So I don't want a button that, after being pressed, opens a sub-menu (like the classic 3-dot menu).
I created a new button, this:
<item android:id="#+id/action_refresh"
android:icon="#drawable/refresh"
android:title="#string/refresh_string"
android:showAsAction="always"/>
and it's shown on the ActionBar, but if I click it, naturally, it doesn't do anything.
How can I manage to get an Action just pressing it?
Thanks!
You Need to override onOptionsItemSelected
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.action_refresh:
//do your stuff
return true;
default:
return super.onOptionsItemSelected(item);
}
}
Same as Homo sapiens's answer, but with an if-structure.
Add this method to your Activity class:
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
if (item.getItemId() == R.id.action_refresh)
{
// do your stuff
return true;
}
else if (item.getItemId() == R.id.otherItem)
{
// do other stuff
return true;
}
// ...
else
{
return super.onOptionsItemSelected(item);
}
}