I'm very new to Android development.
In my MainActivity.java file, I've declared an onOptionsItemSelected(MenuItem menu) method that allows the user to jump between the current MainActivity.java page and another page I created called Settings.java.
When the user goes to the Settings.java page, and they click on the Home option from the menu, nothing happens. I know this is because the onOptionsItemSelected(MenuItem menu) is only defined in the MainActivity.java class and not in the Settings.java class.
I'm overcoming this right now by copying the onOptionsItemSelected(MenuItem menu) from MainActivity.java into Settings.java. But this is very redundant.
Where should I be declaring methods that could be reused in different classes?
MainActivity.java
public class MainActivity extends Activity {
...
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_settings:
showMsg("Settings Clicked");
this.startActivity(new Intent(this, Settings.class));
return true;
case R.id.action_home:
showMsg("Home clicked");
this.startActivity(new Intent(this, MainActivity.class));
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void showMsg(String msg) {
Toast toast = Toast.makeText(this.getBaseContext(), msg, Toast.LENGTH_LONG);
toast.show();
}
}
Settings.java
public class Settings extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_settings:
this.startActivity(new Intent(this, Settings.class));
return true;
case R.id.action_home:
this.startActivity(new Intent(this, MainActivity.class));
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
If you create an Activity called BaseActivity that has your common onOptionsItemSelected() code then extend this class to create MainActivity and Settings both of these classes will use the super class' (i.e. BaseActivity's) onOptionsItemSelected().
Another approach is to switch to Fragments, since Fragments use the host Activity's onOptionsItemSelected() as well as their own. Both of these tactics allow you to use "centralized" code and not have to maintain multiple "cut and paste" copies.
Related
#Override
public boolean OnCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
return true;
}
#Override
public boolean OnOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.logout:
FirebaseAuth.getInstance().signOut();
startActivity(new Intent(MainActivity.this, StartActivity.class));
finish();
return true;
}
I have a error message when i build on AndroidStudio : error: method does not override or implement a method from a supertype
I need help
Those methods have a lower case 'o'
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu); return true; }
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.logout:
FirebaseAuth.getInstance().signOut();
startActivity(new Intent(MainActivity.this, StartActivity.class)); finish(); return true; }
I can give link via Button.But I want to add a App store link to "rateus" in menu item.(please see attached image)here is the button code in MainActivity.java.This is not working for menu item.please help me.
//rateus button
android.widget.Button ratebutton = (android.widget.Button) findViewById(R.id.id_rateus);
ratebutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
try {
startActivity(new Intent(Intent.ACTION_VIEW,
android.net.Uri.parse("market://play.google.com/store/apps/details?id=com.slsindupotha&hl=en")));
}catch (android.content.ActivityNotFoundException e){
startActivity(new Intent(Intent.ACTION_VIEW,
android.net.Uri.parse("https://play.google.com/store/apps/details?id=com.slsindupotha&hl=en")));
}
}
});
//end rateus button code
here is my menu item image...
rate us ite menu
here is the code for rate us item
<item
android:id="#+id/id_rateus"
android:orderInCategory="100"
android:title="#string/action_rateus"
android:textAllCaps="false"
app:showAsAction="ifRoom" />
You need to override the menu functions, something like the code below.
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds appModels to the action bar if it is present.
this.menu = menu;
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
switch (id) {
case R.id.share:
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
String shareBodyText = "Check it out. Your message goes here";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT,"Subject here");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBodyText);
startActivity(Intent.createChooser(sharingIntent, "Shearing Option"));
return true;
case R.id.id_rateus:
try {
startActivity(new Intent(Intent.ACTION_VIEW,
android.net.Uri.parse("market://play.google.com/store/apps/details?id=com.slsindupotha&hl=en")));
}catch (android.content.ActivityNotFoundException e){
startActivity(new Intent(Intent.ACTION_VIEW,
android.net.Uri.parse("https://play.google.com/store/apps/details?id=com.slsindupotha&hl=en")));
}
return true;
}
return super.onOptionsItemSelected(item);
}
This is how you can handle a menu item click
Inflate the menu file
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_file, menu);
return true;
}
Then handle onCLick here
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.id_rateus:
//handle onclick event for intent to playstore
return true;
default:
return super.onOptionsItemSelected(item);
}
}
there are many questions about the topic but i can't figure out my problem. I have a menu declared in my MainActivity(ActionBarActivity). Now i want to work with MenuItem in onOptionsItemSelected of a Fragment class. Here is my MainActivity methods
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// toggle nav drawer on selecting action bar app icon/title
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle action bar actions click
switch (item.getItemId()) {
case R.id.add_note:
createNewNote();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void createNewNote() {
Intent addIntent = new Intent(MainActivity.this, AddNote.class);
startActivity(addIntent);
}
And Fragment methods
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.add_note:
Toast.makeText(getActivity(), "Entered into fragment", Toast.LENGTH_LONG).show();
createNewNote();
return true;
default:
break;
}
return super.onOptionsItemSelected(item);
}
private void createNewNote() {
Intent addIntent = new Intent(getActivity(), AddNote.class);
startActivity(addIntent);
}
Here in MainActivity onOptionsItemSelected get called even in Fragment but doesn't in Fragment as i don't see Toast in Fragment. I think something is missed in my code. Thanks in advance.
inside onOptionsItemSelected() in activity inside your switch after calling createNewNote() instead of returning true return super.onOptionsItemSelected(item)
you must call setHasOptionsMenu() inside onCreate of fragment for menu related method to work.
Your onCreateOptionsMenu() method does not inflate the menu file:
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
}
I want to use a library activity with my test app onOptionsItemSeleceted method() but I figure out that if I use intent. Android use library activity's onOptionsItemSeleceted method() not my test activity method(). I did one test app and my MainActivity like this:
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = new Intent (this, Test_1.class);
startActivity(intent);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_setting:
Toast.makeText(getApplicationContext(),
"Button is clicked", Toast.LENGTH_LONG).show();
return true;
case R.id.action_setting1:
Toast.makeText(getApplicationContext(),
"Button is clicked", Toast.LENGTH_LONG).show();
return true;
case R.id.action_settings:
Toast.makeText(getApplicationContext(),
"Button is clicked", Toast.LENGTH_LONG).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
And my test activity class is like:
public class Test_1 extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test_1);
TextView txt = (TextView)findViewById(R.id.textView);
txt.setText("This is new page");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.test_1, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return false;
}
return super.onOptionsItemSelected(item);
}
I want to use onOptionsItemSelected() method in Main Activity class but I couldn't see my Toast messages on the screen.
I really appreciated if you can help me. Thanks :)
Hmm, Maybe it go through ?
default:
return super.onOptionsItemSelected(item);
I'm not sure what is in R.menu.main
But make sure there are R.id.action_setting, R.id.action_setting1, R.id.action_settings.
SUPER:
It is used inside a sub-class method definition to call a method defined in the super class.
In your case Activity is a super class of Test_1 onOptionsItemSelected of activity will be called .. not the MainActivity onOptionsItemSelected
Just add this to see your toast messages. In class Test_1 onOptionsItemSelected :
switch (item.getItemId()) {
case R.id.action_setting:
Toast.makeText(getApplicationContext(),
"Button is clicked", Toast.LENGTH_LONG).show();
return true;
case R.id.action_setting1:
Toast.makeText(getApplicationContext(),
"Button is clicked", Toast.LENGTH_LONG).show();
return true;
case R.id.action_settings:
Toast.makeText(getApplicationContext(),
"Button is clicked", Toast.LENGTH_LONG).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
I'm following a tutorial on ActionBarCompat that also enables a search text area. I extended the ActionBarActivity from the v7 support lib. When I try to override these two methods it can't find them in the superclass. I went to source and looked at the superclass' methods and I can't locate them there as well. The two methods are onQueryTextSubmit and onQueryTextChange
This was the tutorial.
Any idea what I am doing wrong?
This is the error when I hover over the methods:
The method onQueryTextChange(String) of type MainActivity must override or implement a supertype method
public class MainActivity extends ActionBarActivity{
private SearchView mSearchView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
ViewConfiguration config = ViewConfiguration.get(this);
Field menuKeyField = ViewConfiguration.class.getDeclaredField("sHasPermanentMenuKey");
if(menuKeyField != null) {
menuKeyField.setAccessible(true);
menuKeyField.setBoolean(config, false);
}
} catch (Exception ex) {
// Ignore
}
}
#Override
public boolean onQueryTextSubmit(String s) {
Toast.makeText(this, s, Toast.LENGTH_LONG).show();
return true;
}
#Override
public boolean onQueryTextChange(String s) {
return false;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
MenuItem searchItem=menu.findItem(R.id.action_search);
mSearchView = (SearchView) MenuItemCompat.getActionView(searchItem);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()){
case R.id.action_search:
mSearchView.setIconified(false);
return true;
}
return false;
}
It sounds like you are not implementing the class that is needed for those methods.
public class MainActivity extends ActionBarActivity implements SearchView.OnQueryTextListener
Make sure that you implemented SearchView.OnQueryTextListener.