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Tabbed Activity and Menu in Toolbar

I have a Tabbed Activity with 3 different tabs with fragments.
I have a Toolbar too and in this Toolbar i have 1 static menu object and 1 dynamic object.
I put the static object (bluetooth connection) into MainActivity that contains Fragments loaded into a container and the dynamic button into the Fragment that need that button.
The problem is that if i declare the method of menu into MainActivity, the methods declared into fragments are useless and when i press the icon nothing happends....
But if i delete the method that manage menu into MainActivity now the buttons into fragments works...
There is some way to around this thing?
Or the only way is to repeat to every fragments the static button and for each fragment add the specific buttons that other fragments don't need?
MainActivity menu method:
#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_main, menu);
return true;
}
#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.
switch (item.getItemId()) {
case R.id.action_bluetooth:
if (mBluetoothService == null) {
Log.d(TAG, "menu Bluetooth button");
setupComunication();
} else {
mBluetoothService = null;
setupComunication();
}
// Launch the DeviceListActivity to see devices and do scan
Intent serverIntent = new Intent(this, DeviceListActivity.class);
startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_INSECURE);
//findDevice();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
Fragment menu method:
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// Inflate the menu; this adds items to the action bar if it is present.
inflater.inflate(R.menu.menu_dashboard, menu);
super.onCreateOptionsMenu(menu, inflater);
}
#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.
switch (item.getItemId()) {
case R.id.action_commands:
// User chose the "Settings" item, show the app settings UI...
Intent settingsIntent = new Intent(getActivity(), SettingsActivity.class);
startActivityForResult(settingsIntent, RESULT_SETTINGS);
return true;
default:
return super.onOptionsItemSelected(item);
}
}

Override these two methods in your Fragment, add items of menu_dashboard to menu_main and set visibility of menuItem to false by default:
#Override
public void onPrepareOptionsMenu(Menu menu) {
menu.findItem(R.id.action_commands).setVisible(true);
}
#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.
switch (item.getItemId()) {
case R.id.action_commands:
// User chose the "Settings" item, show the app settings UI...
Intent settingsIntent = new Intent(getActivity(), SettingsActivity.class);
startActivityForResult(settingsIntent, RESULT_SETTINGS);
return true;
default:
return super.onOptionsItemSelected(item);
}
}

Settings button are not available with listview

Where is setting button (3 small points in right corner) ? And how to return it?
When I started to use ListView with another layout , my action bar dissapear.
May be reason is using another layout?
MainActivity.java
public class MainActivity extends ListActivity {
String[] values = new String[100];
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_main);
ListView listView = (ListView)findViewById(R.id.listView);
for (int i=0;i<=99;i++){
values[i]=Integer.toString(i+1);
}
MyCustomAdapter adapter = new MyCustomAdapter(this, values);
setListAdapter(adapter);
}
#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_main, menu);
return true;
}
#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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
Intent intent = new Intent(MainActivity.this,SettingActivity.class);
startActivity(intent);
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
String item = (String) getListAdapter().getItem(position);
Toast.makeText(this, item + " selected", Toast.LENGTH_SHORT).show();
}
}

To use the default ActionBar:
Ensure your app's theme (in styles.xml has a Theme.AppCompat.* parent which also contains an ActionBar. For example:
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="colorPrimary">#color/specify_action_bar_color_here</item>
<item name="colorPrimaryDark">#color/specify_status_bar_color_here</item>
<item name="colorAccent">#color/specify_widget_color_here</item>
</style>
Then, ensure your Activity class extends AppCompatActivity, rather than simply Activity. For example:
public class MainActivity extends AppCompatActivity {
//...
}

Android studio: An error has occured

I'm working on programming a android application. But as soon as I would like to test my application in my simulator, I get an instant error.
This is my code.
public class MainActivity extends Activity implements View.OnClickListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
Button toPech = (Button)findViewById(R.id.toPech);
toPech.setOnClickListener(this);
ImageButton toInfo = (ImageButton)findViewById(R.id.toInfo);
toInfo.setOnClickListener(this);
//this button is not in the same layoutactivity as the other 2.
ImageButton backPech = (ImageButton)findViewById(R.id.backPech);
backPech.setOnClickListener(this);
}
#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_main, menu);
return true;
}
#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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.toPech:
startActivity(new Intent(getApplicationContext(), LocationActivity.class));
break;
case R.id.toInfo:
startActivity(new Intent(getApplicationContext(), InfoActivity.class));
break;
case R.id.backPech:
startActivity(new Intent(getApplicationContext(), MainActivity.class));
break;
}
}
I would like to know what is wrong so that I can.

From your commented line:
//this button is not in the same layoutactivity as the other 2.
I think you have a NullPointerException.
While the Button "backPech" isn't in activity_main.xml, so calling findViewById(R.id.backPech); will return a null object ( backPech will be null).
And calling setOnClickListener(this); to a null object will cause the NullPointerException.

what to do if backpressed

i have a code to change the text of textview in a layout according to the value of the edittext (et) in the previous layout >> somethig like this
I cannot comment, so i will help you editing. Use SharedPreferences to store the string from the edittext in order to get persistance. Then get the string from the SharedPreferences and do the same thing that you are doing(pass it through the intent)
there is MorningDrsGeneral :
public class MorningDrsGeneral extends ActionBarActivity {
Button button ;
EditText et;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.morningdrs);
et = (EditText) findViewById(R.id.et);
addListenerOnButton1();
}
public void addListenerOnButton1() {
final Context context = this;
button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Intent intent = new Intent(context, bookingKamal.class);
intent.putExtra("fn" , et.getText().toString());
startActivity(intent);
}
});
}
#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) {
// 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 == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
and there is bookingKamal.java :
public class bookingKamal extends ActionBarActivity {
Button button;
TextView textView3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.bookingkamal);
textView3 = (TextView) findViewById(R.id.textView3);
String A = textView3.getText().toString();
String N = " ";
if (A.equals(N)){
Intent intent = getIntent();
String texx = intent.getStringExtra("fn");
textView3.setText(texx);
}
}
#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) {
// 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 == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
So i have to keep the text in the bookingKamal activity .. it means when i go back from this layout and back to it the text should be the same as previous. And in this code it back to null :/ or

You have two options here:
Save the value into the internal file system so it can still will be loaded after the app has been unloaded
Save the value in the Activity which holds the button to this activity and save the text over there in a variable and when the bookingkamal activity starts, it could be read from somewhere (hint: Intent#putExtra("KEY", "VALUE"))
I am not describing how you should do it because there is enough documentation about it out there and that is not the point of this answer. This should give you an idea how to it.

You can do that by using sharedpreferences.
The above link will help you undderstand how to use it.
To add data to SharedPreferences use
SharedPreferences.Editor editor = getPreferences(MODE_PRIVATE).edit();
editor.putString("text", mSaved.getText().toString());
editor.putInt("selection-start", mSaved.getSelectionStart());
editor.putInt("selection-end", mSaved.getSelectionEnd());
editor.apply();
And to retrieve
SharedPreferences prefs = getPreferences(MODE_PRIVATE);
String restoredText = prefs.getString("text", null);
if (restoredText != null)
{
//mSaved.setText(restoredText, TextView.BufferType.EDITABLE);
int selectionStart = prefs.getInt("selection-start", -1);
int selectionEnd = prefs.getInt("selection-end", -1);
/*if (selectionStart != -1 && selectionEnd != -1)
{
mSaved.setSelection(selectionStart, selectionEnd);
}*/
}
Note : that SharedPreferences will save the value such that, even of you close the application and restart it. The values will still remain. So, make sure you clear the data when you done with it. You can read more about it here at the SharedPreferences docs.

Android action overflow drawn on top of ActionBar

In order to have the ActionBar in my application, my main activity extends from android.support.v7.app.ActionBarActivity. This is how it looks:
However, when I click in the overflow action button, the options show up over the ActionBar:
I wanted to show the overflow menu under the ActionBar, as it is supposed to. How can I solve this?
I'm running Android 4.4 (KITKAT). If you need any more details, just ask. Thanks.
Here is the code of my main activity:
public class SendMessageActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_send_message);
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setLogo(R.drawable.ic_action_bar_icon);
getSupportActionBar().setDisplayUseLogoEnabled(true);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.activitySendMessage, new SendMessageFragment())
.commit();
}
}
#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_activity_send_message, menu);
return true;
}
#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();
//noinspection SimplifiableIfStatement
if (id == R.id.actionSettings) {
startActivity(new Intent(this, SettingsActivity.class));
return true;
}
if (id == R.id.actionShowHistory) {
startActivity(new Intent(this, SentMessagesHistoryActivity.class));
return true;
}
return super.onOptionsItemSelected(item);
}
}