Android example to create grouped sub OptionsMenu

Create menu/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<menu 
 >
 <item
 android_id="@+id/option1"
 android_orderInCategory="100"
 app_showAsAction="ifRoom"
 android_title="Option 1"/>
 <item
 android_id="@+id/option2"
 android_orderInCategory="100"
 app_showAsAction="never"
 android_title="Option 2"/>
 <item
 android_id="@+id/option3"
 android_orderInCategory="100"
 app_showAsAction="never"
 android_title="Option 3...">
 <menu >
 <group android_id="@+id/group3"
 android_checkableBehavior="single">
 <item android_id="@+id/submenu3a"
 android_title="SubMenu 3A" />
 <item android_id="@+id/submenu3b"
 android_title="SubMenu 3B" />
 </group>
 </menu>

 </item>
</menu>

MainActivity.java

package com.blogspot.android_er.androidoptionsmenu;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 getMenuInflater().inflate(R.menu.activity_main, menu);
 return super.onCreateOptionsMenu(menu);
 }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
 switch(item.getItemId()){
 case R.id.option1:
 Toast.makeText(MainActivity.this, "Option 1", Toast.LENGTH_LONG).show();
 return true;
 case R.id.option2:
 Toast.makeText(MainActivity.this, "Option 2", Toast.LENGTH_LONG).show();
 return true;
 case R.id.submenu3a:
 Toast.makeText(MainActivity.this, "Option 3 A", Toast.LENGTH_LONG).show();
 return true;
 case R.id.submenu3b:
 Toast.makeText(MainActivity.this, "Option 3 B", Toast.LENGTH_LONG).show();
 return true;
 }
 return super.onOptionsItemSelected(item);
 }
}

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Animated GIF Androidify for 3D Hologram viewer

Last post I tried to generate interactive animation using ObjectAnimator, to simulate 3D Hologram effect. This post I create Custom View to display animated GIF of Androidify, to simulate the effect.

The animated GIFs of Androidify are create using Googles Androidify App.  Then I have to edit the animated GIFs to resize it to 200x200, and change the background to black using GIMP. Then copy the files to drawable folder in Android Studio project.

Create a custom view, GifView, to handle the animated GIF. If you are looking for display animated GIF, refer "Play animated GIF using android.graphics.Movie, with Movie.decodeStream(InputStream)". In this version, I have to handle src attribute from xml, such that I can display four GifView of different source.

GifView .java

package com.blogspot.android_er.androidmirror;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Movie;
import android.util.AttributeSet;
import android.view.View;

import java.io.InputStream;

public class GifView extends View {

 private InputStream gifInputStream;
 private Movie gifMovie;
 private int movieWidth, movieHeight;
 private long movieDuration;
 private long mMovieStart;

 public GifView(Context context) {
 super(context);
 init(context, null);
 }

 public GifView(Context context, AttributeSet attrs) {
 super(context, attrs);
 init(context, attrs);
 }

 public GifView(Context context, AttributeSet attrs,
 int defStyleAttr) {
 super(context, attrs, defStyleAttr);
 init(context, attrs);
 }

 private void init(Context context, AttributeSet attrs){
 setFocusable(true);

 //Handle src attribute from xml
 if(attrs == null){
 gifInputStream = context.getResources().openRawResource(R.drawable.androidify1b);
 }else{
 int src_id = attrs.getAttributeResourceValue(
 "http://schemas.android.com/apk/res/android",
 "src",
 R.drawable.androidify1b);
 gifInputStream = context.getResources().openRawResource(src_id);
 }

 gifMovie = Movie.decodeStream(gifInputStream);
 movieWidth = gifMovie.width();
 movieHeight = gifMovie.height();
 movieDuration = gifMovie.duration();
 }

 @Override
 protected void onMeasure(int widthMeasureSpec,
 int heightMeasureSpec) {
 setMeasuredDimension(movieWidth, movieHeight);
 }

 public int getMovieWidth(){
 return movieWidth;
 }

 public int getMovieHeight(){
 return movieHeight;
 }

 public long getMovieDuration(){
 return movieDuration;
 }

 @Override
 protected void onDraw(Canvas canvas) {

 long now = android.os.SystemClock.uptimeMillis();
 if (mMovieStart == 0) { // first time
 mMovieStart = now;
 }

 if (gifMovie != null) {

 int dur = gifMovie.duration();
 if (dur == 0) {
 dur = 1000;
 }

 int relTime = (int)((now - mMovieStart) % dur);

 gifMovie.setTime(relTime);

 gifMovie.draw(canvas, 0, 0);
 invalidate();

 }

 }
}

layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
 
 
 android_layout_width="match_parent"
 android_layout_height="match_parent"
 android_padding="16dp"
 android_background="@android:color/black"
 tools_context=".MainActivity">

 <TextView
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_autoLink="web"
 android_text="http://android-er.blogspot.com/"
 android_textStyle="bold"
 android_layout_alignParentTop="true"/>

 <GridLayout
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_columnCount="3"
 android_layout_centerInParent="true">
 <ImageView
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"/>
 <com.blogspot.android_er.androidmirror.GifView
 android_id="@+id/image2"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_src="@drawable/androidify1b"
 android_layout_gravity="center"/>
 <ImageView
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"/>
 <com.blogspot.android_er.androidmirror.GifView
 android_id="@+id/image4"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_src="@drawable/androidify2b"
 android_layout_gravity="center"
 android_rotation="270"/>
 <ImageView
 android_layout_width="20mm"
 android_layout_height="20mm"/>
 <com.blogspot.android_er.androidmirror.GifView
 android_id="@+id/image6"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_src="@drawable/androidify3b"
 android_layout_gravity="center"
 android_rotation="90"/>
 <ImageView
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"/>
 <com.blogspot.android_er.androidmirror.GifView
 android_id="@+id/image8"
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_src="@drawable/androidify4b"
 android_layout_gravity="center"
 android_rotation="180"/>
 <ImageView
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"/>

 </GridLayout>
</RelativeLayout>

Edit AndroidManifest.xml to disable hardwareAccelerated by setting it false.

<?xml version="1.0" encoding="utf-8"?>
<manifest 
 package="com.blogspot.android_er.androidmirror" >

 <application
 android_allowBackup="true"
 android_icon="@mipmap/ic_launcher"
 android_label="@string/app_name"
 android_supportsRtl="true"
 android_theme="@style/AppTheme" >
 <activity android_name=".MainActivity"
 android_hardwareAccelerated="false">
 <intent-filter>
 <action android_name="android.intent.action.MAIN" />

 <category android_name="android.intent.category.LAUNCHER" />
 </intent-filter>
 </activity>
 </application>

</manifest>

Nothing do on MainActivity.java

package com.blogspot.android_er.androidmirror;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 }

}

Download the files (Android Studio Format) .

Download APK .

---

If you have a DIY 3D Hologram Projector, you can view the test view at YouTube.

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Android 6 Essentials

Design, build, and create your own applications using the full range of features available in Android 6

Android 6 Essentials
About This Book

• Learn how to utilize the robust features of Android 6 to design, develop, and publish better Android applications
• Get useful guidance on creating new apps or migrating existing apps to support features such as app permissions, app links, fingerprint authentication, etc
• A fast paced guide, packed with hands-on examples that ties all the features such as API, audio, video, camera, tab customization together under a single cover

Who This Book Is For
This book is for Android developers who are looking to move their applications into the next Android version with ease.

What You Will Learn

• Familiarize yourself with the features of Android 6
• Code with the new Android permissions model
• Use apps auto backup and restore lost data automatically
• Increase user engagement with apps through an assistant using triggers and providing contextual assistance
• Assess and handle proper usage of the API
• Work with Audio, Video,Camera in Android 6
• Utilize the new features in Android for professional purposes
• Understand and code Chromes custom tabs

In Detail
Android 6 is the latest and greatest version of the Android operating system, and comes packed with cutting edge new features for you to harness for the benefit of building better applications.

This step-by-step guide will take you through the basics of the Android Marshmallow permissions model and beyond into other crucial areas such as the Audio,Video,Camera API and Androids at work features. Learn how to create, deploy, and manage Android applications with Marshmallows API and the latest functionalities.

The combination of instructions and real-world examples will make your application deployment and testing a breeze.

Style and approach
This easy-to-follow, step-by-step tutorial provides explanations and examples to add the new Android 6 features to your skill set. Each chapter provides sequential steps and detailed information about the API, as well as best practices and testing options.

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Create AVD using new Android Emulator in Android Studio 2 0 Preview

New Android Emulator Preview is available now, you can create AVD using new Emulator in Android Studio 2.0 Preview.

When I try it, dialog pop up with error message:

emulator: ERROR: Couldnt find crash service executable
C:UsersuserAppDataLocalAndroidsdk oolsemulator64-crash-service.exe
...

I check my system, I have emulator-crash-service.exe, not emulator64-crash-service.exe! I dont know is it a bug, or anything wrong in my setting.

updated@2015-12-13:
Seem its a bug of the new emulator in Windows. Somebody reported this issue: https://code.google.com/p/android/issues/detail?id=196629

Anyway, the emulator still can run and deploy my Hello World. This video show steps to create AVD using new Android Emulator in Android Studio 2.0 Preview; run on Windows 10 with CPU of Intel i5.


Reference:
- Android Developers Blog: Android Studio 2.0 Preview: Android Emulator
- Android Tools Project Site: Android Emulator Preview (with system requirement and update SDK)

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