Android - How to add text to a menu item?

Question

I am developing an Android app, I've created an item in menu 'About'. I want it display text like Dev Name, Contact, App version when I click on it, in a separate page or activity. I don't know how to do this, I am using a toast message to show these details. Please Help !

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <ImageButton
        android:id="@+id/btnSwitch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="100dip"
        android:src="@drawable/btn_switch_on"
        android:background="@null"
        android:contentDescription="@null"
         />   

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/text1"
        android:layout_marginTop="10dp"
        android:paddingLeft="10dp"
        android:lines="2"
        android:id="@+id/text2"
        android:clickable="true"
        android:text="wTorch v1.0"
        android:fontFamily="Droid Sans"
        android:autoLink="all"
        android:typeface="serif"
        android:textSize="20sp"
        android:gravity="right"
        android:textAlignment="gravity" />

</RelativeLayout>

MainActivity.java

package com.wtech.wtorch;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.ImageButton;
import android.widget.Toast;
import android.view.Menu;  
import android.view.MenuItem;


    public class MainActivity extends Activity {

    private static final Parameters para = null;

    private static Camera cam = null;

    private static boolean doubleBackToExitPressedOnce = false;

    ImageButton btnSwitch;

    private Camera camera;
    private boolean isFlashOn;
    private boolean hasFlash;
    Parameters params;
    MediaPlayer mp;


    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;  
    }  
    @Override  
    public boolean onOptionsItemSelected(MenuItem item) {  
        switch (item.getItemId()) {  
            case R.id.about:  
                Toast.makeText(getApplicationContext()," App Version - 1.0 \n Developer - Mohammad Waris Ansari \n Contact - mohdwaris723@gmail.com",Toast.LENGTH_LONG).show();
            return true;
            default:  
                return super.onOptionsItemSelected(item);  
        }  
    }  


    @Override
    public void onBackPressed() {
        if (doubleBackToExitPressedOnce) {
            super.onBackPressed();
            return;
        }

        this.doubleBackToExitPressedOnce = true;
        Toast.makeText(this, "Press again to exit", Toast.LENGTH_SHORT).show();

        new Handler().postDelayed(new Runnable() {

            @Override
            public void run() {
                doubleBackToExitPressedOnce=false;                       
            }
        }, 2000);
    } 

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnSwitch = (ImageButton) findViewById(R.id.btnSwitch);    
        hasFlash = getApplicationContext().getPackageManager()
                .hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);

        if (!hasFlash) {
            AlertDialog alert = new AlertDialog.Builder(MainActivity.this)
                    .create();
            alert.setTitle("Error");
            alert.setMessage("Sorry, your device doesn't support flash light!");
            alert.setButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    // closing the application
                    finish();
                }
            });
            alert.show();
            return;
        }

        // get the camera
        getCamera();

        // displaying button image
        toggleButtonImage();


        // Switch button click event to toggle flash on/off
        btnSwitch.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                if (isFlashOn) {
                    // turn off flash
                    turnOffFlash();
                } else {
                    // turn on flash
                    turnOnFlash();
                }
            }
        });
    }


    // Get the camera
    private void getCamera() {
        if (camera == null) {
            try {
                camera = Camera.open();
                params = camera.getParameters();
            } catch (RuntimeException e) {
                Log.e("Camera Error. Failed to Open. Error: ", e.getMessage());
            }
        }
    }
 // Turning On flash
    private void turnOnFlash() {
        if (!isFlashOn) {
            if (camera == null || params == null) {
                return;
            }
            params = camera.getParameters();
            params.setFlashMode(Parameters.FLASH_MODE_TORCH);
            camera.setParameters(params);
            camera.startPreview();
            isFlashOn = true;

            // changing button/switch image
            toggleButtonImage();
        }

    }


    // Turning Off flash
    private void turnOffFlash() {
        if (isFlashOn) {
            if (camera == null || params == null) {
                return;
            } 
            params = camera.getParameters();
            params.setFlashMode(Parameters.FLASH_MODE_OFF);
            camera.setParameters(params);
            camera.stopPreview();
            isFlashOn = false;

            // changing button/switch image
            toggleButtonImage();
        }
    }

    /*
     * Toggle switch button images
     * changing image states to on / off
     * */
    private void toggleButtonImage(){
        if(isFlashOn){
            btnSwitch.setImageResource(R.drawable.btn_switch_on);
        }else{
            btnSwitch.setImageResource(R.drawable.btn_switch_off);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
    }

    @Override
    protected void onPause() {
        super.onPause();
        turnOffFlash();
    }

    @Override
    protected void onRestart() {
        super.onRestart();
    }

    @Override
    protected void onResume() {
        super.onResume();
        if(hasFlash)
            turnOnFlash();
    }

    @Override
    protected void onStart() {
        super.onStart();
        getCamera();
    }

    @Override
    protected void onStop() {
        super.onStop();
        if (camera != null) {
            camera.release();
            camera = null;
        }
    }

}

menu_main.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/about"
android:title="About"
android:icon="@drawable/ic_menu_info_details"/>
</menu>

Answer 1

You will need to display a custom dialog alert.

dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:textColor="#FFF"
    android:text="Some Text"/>

<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:textColor="#FFF"
    android:text="Some Text"/>

 <Button
    android:id="@+id/declineButton"
    android:layout_width="100px"
    android:layout_height="wrap_content"
    android:text=" OK "
    android:layout_marginTop="5dp"
    android:layout_marginRight="5dp"
    />

</RelativeLayout> 

And in your onOptionsItemSelected,

  @Override  
   public boolean onOptionsItemSelected(MenuItem item) {  
    switch (item.getItemId()) {  
        case R.id.about:  

   // Create custom dialog object
            final Dialog dialog = new Dialog(MainActivity.this);
            // Include dialog.xml file
            dialog.setContentView(R.layout.dialog);
            // Set dialog title
            dialog.setTitle("About");

          dialog.show();

            Button declineButton = (Button) dialog.findViewById(R.id.declineButton);
            // if decline button is clicked, close the custom dialog
            declineButton.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    // Close dialog
                    dialog.dismiss();
                }
            });

          return true;
          default:  
              return super.onOptionsItemSelected(item);  
      }  
     } 

Answer 2

You can open new activity when click on button. Update your onOptionsItemSelected(MenuItem item) like this:

   @Override  
            public boolean onOptionsItemSelected(MenuItem item) {  
                switch (item.getItemId()) {  
                    case R.id.about:  
                      Intent intent = new Intent(MainActivity.this,NewActivity.class); // code to start new activity instead of showing toast
                      intent.putExtra("version","1.0");                     
                      startActivity(intent);
                    return true;
                    default:  
                        return super.onOptionsItemSelected(item);  
                }  
            }  

You can send data like app version,developer and contact from one activity to another using intent.putExtre() and show these data to new activity.

In the NewActivity, you can get data which is coming from old activity like this:

 Intent intent = getIntent();
    String version= intent.getStringExtra("version");

Answer 3

Create a second activity and navigate to it in onOptionsItemSelected

@Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId()) {
            case R.id.about:
                startActivity(new Intent(this, AboutActivity.class));
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }