Develop Reference

Action on item in Toolbar?

I have ToolbarCustom that has two items and an item can be clicked to open or close the layout. I am wondering how can I use the same item for opening and closing layout?
This my Code, but the variable openLayout is not defined:
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();
linearLayout = findViewById(R.id.show);
boolean openLayout=true;
if (id == R.id.action_categure) {
if (openLayout) {
linearLayout.setVisibility(View.VISIBLE);
openLayout=false;
} else {
linearLayout.setVisibility(View.GONE);
openLayout =true;
}
}
if (id==R.id.action_card){
return true;
}
return super.onOptionsItemSelected(item);
}

boolean firstTimeClick = true; //global variable
boolean secondTimeClick = false; //global variable
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();
linearLayout = findViewById(R.id.show);
if (id == R.id.action_categure) {
if (firstTimeClick) {
firstTimeClick = false;
secondTimeClick= true;
linearLayout.setVisibility(View.GONE);
} else if (secondTimeClick){
firstTimeClick= true;
secondTimeClick= false;
linearLayout.setVisibility(View.VISIBLE);
}
}
if (id==R.id.action_card){
return true;
}
return super.onOptionsItemSelected(item);
}
Is that what you want to achieve?Hope I helped you.

App Constant in application

I created Listview and menu options in android application with App Constants to minimize the number of classes
Ex:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context=this;
lv=(ListView) findViewById(R.id.listView);
lv.setAdapter(new ArrayAdapter<String>(this,R.layout.list_item,prgmNameList));
lv.setOnItemClickListener(this);
}
OnClickListener
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch (position)
{
case 0:
Intent intent = new Intent(this, First.class);
intent.putExtra(AppConstants.MAIN_ACTIVITY_TAG,lv.getItemAtPosition(position).toString());
startActivity(intent);
break;
}
But i need apply app constants to Menu Options too
But i don't know how to do that:
Here is the code for Menu Options
// create action options for options
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.news, 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_about) {
Intent intent = new Intent(this,Extras.class);
startActivity(intent);
}
if (id == R.id.action_advertise) {
return true;
}
if (id == R.id.action_contact) {
return true;
}
if (id == R.id.action_help) {
return true;
}
return super.onOptionsItemSelected(item);
}
I want to do same as listview but for menu options.
Please help me solve this problem.

Just put your string in string.xml .
<string name="menu_name">Show result</string>
and you directly access it in xml .
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".ContainerActivity">
<item
android:id="#+id/menu_action_show"
android:layout_width="wrap_content"
android:icon="#drawable/youricon"
android:title="#string/menu_name"
app:showAsAction="always"/>
You can also access all resources using java code with context :
String menu_name=getString(R.id.menu_name);

how to get my android USSD program to work

am building a simple dialler to help me check my account balance but for some unknown reasons am getting some errors, i have a button on my xml which i have set its onclick element to sendMessage1 , but am getting error on my code with the phoneNum[1] telling me cannot reslove symbol phoneNum[1]. this is my code
/**Called when the user clicks the Send button */
public void sendMessage1(View view){
//example phoneNum[1] = "*556";
String encodedHarsh = Uri.encode("#");
startActivity(new Intent
("android.intent.action.DIAL",
Uri.parse("tel:"+ phoneNum[1]+ encodedHarsh)));
//Do something in response to button
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mtn);
}
#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_mtn, 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);
}

You have to do it doing this :
String encodedHarsh = "*" + "556" + Uri.encode("#");
startActivity(new Intent("android.intent.action.CALL", Uri.parse("tel:" + encodedHarsh)));
Note, don't forget to add uses-permisions on manifest

Android back option in action bar

When I created an activity it automatically added a back to main activity option in the action bar. It looks like those are the functions that do it:
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.app_settings, 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);
}
Is there a way to make it go back using finish()? Right now it looks like it resets some values that are saved and I want to keep them. When I tried working with finish() it didn't do it but i'm not sure how to use it in the action bar.

This is simpler and it works perfect:
public class BackButtonExample extends Activity {
#SuppressLint("NewApi")
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.duahs);
ActionBar bar = getActionBar();
bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#0B4C5F")));
bar.setDisplayHomeAsUpEnabled(true);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
this.finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}

Try this
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId()==android.R.id.home {
finish();
return true; }
else{
return super.onOptionsItemSelected(item);
}
}

Menu click item event

I added 3 menu items: Settings / About and Exit.
As you can see in the code, I made the Exit button to close the app, and I want that when I press the About button to open a new activity. How do I do that?
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
#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) {
// 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;
} else if (id == R.id.Exit){
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
}

if(id == R.id.action_masterz_yuris_about){
Intent openAboutActivityIntent = new Intent(this, MasterZYurisAboutActivity.class);
startActivity(openAboutActivityIntent);
}

try this code
#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;
} else if (id == R.id.Exit){
finish();
return true;
}else if (id == R.id.about){
Intent intent = new Intent(this, SecondActivity.class);
startActivity(intent);
return true;
}
return super.onOptionsItemSelected(item);
}