Skip to main content

Options menu example in android


Options menu example in android/how to create options menu in android

*      Android provides a standard XML format to define menu items
*      create an XML file inside your project's res/menu/ directory and build the menu with the following elements:
*      <menu>(root node,can hold <items>)
*      <item>(represents a single item in a menu)

Res/menu/options.menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
      <item android:id="@+id/next"
              android:icon="@drawable/icon"
              android:title="@string/next" />
      <item android:id="@+id/previous"
            android:icon="@drawable/icon"
            android:title="@string/previous" />
      <item android:id="@+id/list"
            android:icon="@drawable/icon"
            android:title="@string/list" /> 
</menu>

OptionsMenuActivity.xml

package com.example;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;

public class OptionsMenuActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    public boolean onCreateOptionsMenu(Menu menu) {
      MenuInflater inflater = getMenuInflater();
      inflater.inflate(R.menu.options_menu, menu);
      return true;
    }
   
    public boolean onOptionsItemSelected(MenuItem item) {
      switch (item.getItemId()) {
      case R.id.next:
            Toast.makeText(this, "You have chosen the " + getResources().getString(R.string.next) + " menu option",
            Toast.LENGTH_SHORT).show();
            return true;
      case R.id.previous:
            Toast.makeText(this, "You have chosen the " + getResources().getString(R.string.previous) + " menu option",
                        Toast.LENGTH_SHORT).show();
            return true;
      case R.id.list:
            Toast.makeText(this, "You have chosen the " + getResources().getString(R.string.list) + " menu option",
                        Toast.LENGTH_SHORT).show();
            return true;
      default:
            return super.onOptionsItemSelected(item);
      }
    }

}

Screenshots







Comments

Popular posts from this blog

Capture image without surface view as background service in android

Capture image without user knowledge in android/Capture image as background service in android/Take photo without preview in android/ Camera without preview in android  package com.example.picture; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.app.Service; import android.content.Context; import android.content.Intent; import android.hardware.Camera; import android.hardware.Camera.Parameters; import android.media.AudioManager; import android.os.IBinder; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView; public class CameraService extends Service {       //Camera variables       //a surface holder       private SurfaceHolder sHolder ;        //a variable to control the camera       private Camera mCamera ;   ...

Progressbar example in android

Progress bar In android, progress bar can be used to tell the user the task takes longer time to finish. Progress  bar displays a bar which represent how far the operations has progressed. Progress bar can be made indeterminate. In indeterminate mode, progress bar shows a cyclic animation without indication progress. In this tutorial, I’ll show how to display a progress bar  package com.example; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.widget.ProgressBar; import android.widget.TextView; public class ProgressbarExamplActivity extends Activity {       private ProgressBar bar ;       private TextView txt ;       protected boolean isRunning ;       /** Called when the activity is first created. */       @Override       public void ...

Coroutine- A complete tutorial

 What are coroutines? To know about coroutine, first you need to know about asynchronous programming, thread and multithreading concept. What is a thread? Thread describes in which context the function or sequence of instructions should be executed. So, every block of code or functions runs in a thread, right? Also, you can load multiple threads to perform different block of codes  How to start a thread? Thread thread = new Thread(){     public void run(){       System.out.println("This is a thread");     }   }     thread.start(); So when coming to android, before learning about coroutines we need to discuss some scenarios. Normally how an app works when user launch an application. When user launchers the application, a main thread is created. This thread is intended to do small operations like button clicks, UI interaction , small mathematical operations. We cant perform long running op...