I have created an android project, with a couple of activities.
I have also added the back button feature into the activities, however when I click it
nothing happens.
Have I done something wrong?
I've put this code into each of the activities, and none of them work
Any opinion/input is greatly appreciated.
Code for trying to go back from my Gallery activity to the main:
//GalleryActivity.java
public boolean onCreateOptionsMenu(Menu menu) {
// return true;
MenuInflater mif = getMenuInflater();
mif.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
and.. in res/menu/
<item
android:id="#+id/back_icon"
android:icon="#drawable/ic_action_back"
android:title="#string/back_title"
android:showAsAction="always"
/>
I downloaded the proper android design icons, and have added them to the drawable folders too.
EDIT:
Main Activity
button4= (Button) findViewById(R.id.button4);//find the button
button4.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(v.getContext(), GalleryActivity.class);
startActivity(i);
finish();//close main activity after start info activity
}
});// links to gallery page
you have to override onOptionsItemSelected and check for the id. For instance:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.back_icon:
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
You have to specify the action of the options, included the home/back action as follows:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId())
{
case R.id.back_icon:
onBackPressed(); //Or whatever you want to do when back_icon is pressed!
return true;
default:
return super.onOptionsItemSelected(item);
}
}
Related
I want to add a back button as menu in the left of the action bar in fragment. But I don't want the back arrow as my icon.
actionBar.setDisplayHomeAsUpEnabled(true);
The above code line gives the back arrow symbol. Instead i want to use some custom image. Also using that custom image should get it back to its previous activity.
I added something like:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
getActivity().onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
It worked for me.
Add this to your theme in styles.xml:
<item name="android:homeAsUpIndicator">#drawable/my_icon</item>
It will override the default icon. By default it uses the following id:
android.R.id.home
You can use this id to navigate back to your previous activity:
View homeView = getActionBar().getCustomView().findViewById(android.R.id.home);
homeView.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v)
{
//Go back
}
});
or
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
//Return back to your activity!
return true;
}
return super.onOptionsItemSelected(item);
}
For more information check the official documentation at : https://developer.android.com/training/implementing-navigation/ancestral.html
My code:
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
Intent settingsActivity = new Intent(getBaseContext(), Preferences.class);
startActivity(settingsActivity);
return true;
}
This works to open the settings menu (Preferences.class) but I would like it to close the menu if it's already open when this system button is pressed. What can I add or change to make that happen?
Here is how you should be implementing what you want:
First thing first, you want to supply a "Settings" item that can selected by the user to get to your Preferences class. You do that by adding an item to your menu/main.xml and inflating it in onCreateOptionsMenu().
menu/main.xml:
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="#+id/action_settings"
android:orderInCategory="100"
android:showAsAction="never"
android:title="Settings"/>
...
</menu>
Inside your Main Activity, override this to inflate your main.xml file:
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
...
return super.onCreateOptionsMenu(menu);
}
And then override this to handle what happens when a Menu item is selected, in this case the Settings item:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()) {
case R.id.action_settings:
Intent settingsActivity = new Intent(getBaseContext(), Preferences.class);
startActivity(settingsActivity);
return true;
...
default:
return super.onOptionsItemSelected(item);
}
}
I was able to get the menu to close by adding this to my customized preferences menu class:
#Override
public boolean onCreateOptionsMenu(Menu menu) {
onBackPressed();
return false;
}
which calls this:
#Override
public void onBackPressed() {
super.onBackPressed();
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
}
which takes the user back to the screen to play another round. I don't know if this is an acceptable solution for every case but it worked for me.
I have the following code to enable to home button to act as a back button. The problem I'm facing is from this activity if I use the real back button it simply goes back to the previous activity just as I left it. If I use the home button it's reloading the page so I lose what was previously done to it. I'm sure it's something simple I'm missing.
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.census_management_search, menu);
ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
// Handle item selection
switch (item.getItemId())
{
case android.R.id.home:
Intent intent = new Intent(this, CensusManagementActivity.class);
NavUtils.navigateUpTo(this, intent);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
Instead of Intent and NavUtils try using onBackPressed() method.
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
// Handle item selection
switch (item.getItemId())
{
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
The Home/Up button is supposed to reload the new activity. However, if you want to emulate the back button functionality, you can call finish() to return to the previous activity:
case android.R.id.home:
finish();
return true;
I wrote this code in mainactivty.java
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
menu.add("About");
return true;
}
It creates a menu, but I want it to open a new window when I click on the menu.
I'm not sure if this is what you want (cause it seems too obvious) but it sounds like you're asking for the following
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.someItem: //this is your menu item in the menu.xml
startActivity(new Intent(this, MyNewActivity.class)); //here you start your new activity
break;
}
}
How can I implement a custom onClickListener for the Home button of the Action Bar?
I already did a getSupportActionBar().setDisplayHomeAsUpEnabled(true); and now I want to redirect the user to a certain activity in case the Home button is clicked.
I tried with:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
item.setOnMenuItemClickListener(new OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
Intent i = new Intent();
i.setClass(BestemmingActivity.this, StartActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
return true;
}
});
default:
return super.onOptionsItemSelected(item);
}
}
but it never enters in the onMenuItemClick.
Basically, it's done just like in this link but still it doesn't enter in the listener.
if anyone else need the solution
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
onBackPressed(); return true;
}
return super.onOptionsItemSelected(item);
}
I use the actionBarSherlock,
after we set supportActionBar.setHomeButtonEnabled(true);
we can override the onMenuItemSelected method:
#Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
int itemId = item.getItemId();
switch (itemId) {
case android.R.id.home:
toggle();
// Toast.makeText(this, "home pressed", Toast.LENGTH_LONG).show();
break;
}
return true;
}
if we use the system given action bar following code works fine
getActionBar().setHomeButtonEnabled(true);
#Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
int itemId = item.getItemId();
switch (itemId) {
case android.R.id.home:
//do your action here.
break;
}
return true;
}
Fixed: no need to use a setOnMenuItemClickListener.
Just pressing the button, it creates and launches the activity through the intent.
Thanks a lot everybody for your help!
answers in half part of what is happening. if onOptionsItemSelected not control homeAsUp button when parent activity sets in manifest.xml system goes to parent activity. use like this in activity tag:
<activity ... >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.activities.MainActivity" />
</activity>
You need to explicitly enable the home action if running on ICS. From the docs:
Note: If you're using the icon to navigate to the home activity, beware that
beginning with Android 4.0 (API level 14), you must
explicitly enable the icon as an action item by calling
setHomeButtonEnabled(true) (in previous versions, the icon was enabled
as an action item by default).
Best way to customize Action bar onClickListener is onSupportNavigateUp()
This code will be helpful link for helping code
you should to delete your the Override onOptionsItemSelected and replate your onCreateOptionsMenu with this 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.menu_action_bar_finish_order_stop, menu);
menu.getItem(0).setOnMenuItemClickListener(new FinishOrderStopListener(this, getApplication(), selectedChild));
return true;
}