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Senin, 01 Juni 2015
Minggu, 17 Mei 2015
How Android OTA Updates work

How Android OTA Updates work

Presentation at Embedded Linux Conference 2015 by Andrew Boie from Intel Corporation.

AOSP is distributed with the source code and tools for full (whole image) and incremental (binary patch) secure over-the-air (OTA) software updates, specifically an alternate boot target Recovery Console, the updater logic itself, and tools to create software updates. There is no publicly available documentation for how this mechanism is supposed to be integrated. This presentation gives a detailed end-to-end description of how software updates are created, digitally signed, and applied to the device. It includes a discussion on the plug-in architecture and Edify language which allows builders to customize the OTA updates with platform-specific features. This is an updated version of a talk presented at ABS in 2012, with details on new OTA features including block-level OTA updates in Lollipop.

Speakers
Andrew Boie
Intel Corporation
Andrew Boie is a software engineer and scrum master for the Intel Android-IA project hosted on 01.org, which aims to support Android on Intel Core and Atom platforms. Prior to working at Intel Andrew worked for Garmin International as an engineering team lead on Android Eclair-based Nuvifone projects. He spoke at ABS 2011 on the topic of Android OTA Software Updates.
Diposting oleh di 07.29 0 komentar
Selasa, 12 Mei 2015
Rabu, 06 Mei 2015
Older YouTube apps is no longer be supported

Older YouTube apps is no longer be supported



If you see this video in your YouTube app’s video feeds, your device is affected. (Note: If the video appears unexpectedly in a web browser, it means that website is using an outdated method to access YouTube videos.)

As Google upgrade the YouTube Data API to bring more features, the old version will be begin shutting down on April 20, 2015. This will result in the current YouTube app not working on certain device models from 2012 and older.

https://youtube.com/devicesupport
Diposting oleh di 09.56 0 komentar
Senin, 04 Mei 2015
Using VideoView to play mp4, with MediaController enable/disable

Using VideoView to play mp4, with MediaController enable/disable

Example to play mp4 on SDCard/ExternalStorage using android.widget.VideoView. You can also enable/disable the MediaController, contains the buttons like "Play/Pause", "Rewind", "Fast Forward" and a progress slider, by calling VideoView.setMediaController().

With the MediaController set, tap on the video (or the VideoView) to display the controller.


Example code:
package com.example.androidvideoview;

import java.io.File;

import android.support.v7.app.ActionBarActivity;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.MediaController;
import android.widget.Toast;
import android.widget.ToggleButton;
import android.widget.VideoView;
import android.os.Bundle;
import android.os.Environment;

public class MainActivity extends ActionBarActivity {
 
 ToggleButton enableMediaController;
 VideoView myVideoView;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  enableMediaController = (ToggleButton)findViewById(R.id.enableMediaController);
  myVideoView = (VideoView)findViewById(R.id.myvideoview);
  myVideoView.setVideoPath(getViewSrc());
  myVideoView.requestFocus();
  myVideoView.start();
  
  setMediaController();
  
  enableMediaController.setOnCheckedChangeListener(new OnCheckedChangeListener(){

   @Override
   public void onCheckedChanged(CompoundButton buttonView,
     boolean isChecked) {
    setMediaController();
   }});
 }
 
 private void setMediaController(){
  if(enableMediaController.isChecked()){
   myVideoView.setMediaController(new MediaController(this));
  }else{
   myVideoView.setMediaController(null);
  }
 }

 private String getViewSrc(){
  File extStorageDirectory = Environment.getExternalStorageDirectory();
  String s = extStorageDirectory.getAbsolutePath() + "/test.mp4";
  Toast.makeText(MainActivity.this, s, Toast.LENGTH_SHORT).show();
  return s;
 }
}

<LinearLayout 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"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.androidvideoview.MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="android-coding.blogspot.com"
        android:textSize="24dp"
        android:textStyle="bold" />

    <ToggleButton
        android:id="@+id/enableMediaController"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textOn="Disable MediaController"
        android:textOff="Enable MediaController"
        android:checked="true"/>
    <VideoView
        android:id="@+id/myvideoview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

To play the file in SD Card, <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> is needed in AndroidManifest.xml, otherwise "Can't play this video".
Diposting oleh di 11.41 0 komentar
Kamis, 09 April 2015
Android coding example to Set fontFamily

Android coding example to Set fontFamily

Android 4.1 adds several more variants of the Roboto font style for a total of 10 variants, and they're all usable by apps. Your apps now have access to the full set of both light and condensed variants. - http://developer.android.com/about/versions/android-4.1.html

Example:


MainActivity.java 
package com.example.androidfront;

import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
import android.widget.Spinner;
import android.graphics.Typeface;
import android.os.Bundle;

public class MainActivity extends ActionBarActivity {
 
 String typeFaceName[] = {
  "sans-serif",
  "sans-serif-light",
  "sans-serif-condensed",
  "sans-serif-thin",
  "sans-serif-medium"};

 CheckBox checkBold, checkItalic;
 Spinner selTypeFace;
 EditText editArea;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  editArea = (EditText)findViewById(R.id.editarea);
  
  checkBold = (CheckBox)findViewById(R.id.boldsel);
  checkBold.setOnCheckedChangeListener(new OnCheckedChangeListener(){

   @Override
   public void onCheckedChanged(CompoundButton buttonView,
     boolean isChecked) {
    updateFonts();
   }});
  
  checkItalic = (CheckBox)findViewById(R.id.italicsel);
  checkItalic.setOnCheckedChangeListener(new OnCheckedChangeListener(){

   @Override
   public void onCheckedChanged(CompoundButton buttonView,
     boolean isChecked) {
    updateFonts();
   }});
  
  selTypeFace = (Spinner)findViewById(R.id.typefacesel);
  ArrayAdapter<String> adapter = 
   new ArrayAdapter<String>(this, 
    android.R.layout.simple_spinner_item, typeFaceName);
  adapter.setDropDownViewResource(
    android.R.layout.simple_spinner_dropdown_item);
  selTypeFace.setAdapter(adapter);
  selTypeFace.setOnItemSelectedListener(new OnItemSelectedListener(){

   @Override
   public void onItemSelected(AdapterView<?> parent, View view,
     int position, long id) {
    updateFonts();
   }

   @Override
   public void onNothingSelected(AdapterView<?> parent) {}});

 }
 
 private void updateFonts(){

  int tfSel = selTypeFace.getSelectedItemPosition();
  String selTypeFaceName = typeFaceName[tfSel];
  
  int style;
  
  if(!checkBold.isChecked() && !checkItalic.isChecked()){
   style = Typeface.NORMAL;
  }else if(checkBold.isChecked() && !checkItalic.isChecked()){
   style = Typeface.BOLD;
  }else if(!checkBold.isChecked() && checkItalic.isChecked()){
   style = Typeface.ITALIC;
  }else{
   style = Typeface.BOLD_ITALIC;
  }
  
  Typeface tf = Typeface.create(selTypeFaceName, style);
  editArea.setTypeface(tf);

 }

}

activity_main.xml 
<LinearLayout 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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.androidfront.MainActivity"
    android:orientation="vertical" >
    
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="android-coding.blogspot.com"
        android:textSize="24dp"
        android:textStyle="bold" />
    
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal" >
        
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical" >
            
            <TextView
                android:fontFamily="sans-serif"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/test"/>
            <TextView
                android:fontFamily="sans-serif-light"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/test"/>
            <TextView
                android:fontFamily="sans-serif-condensed"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/test"/>
            <TextView
                android:fontFamily="sans-serif-thin"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/test"/>
            <TextView
                android:fontFamily="sans-serif-medium"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/test"/>
            
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical" >
            
            <Spinner
                android:id="@+id/typefacesel"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"/>
            <CheckBox 
                android:id="@+id/boldsel"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="BOLD"/>
            <CheckBox 
                android:id="@+id/italicsel"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="ITALIC"/>
            <EditText
                android:id="@+id/editarea"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:singleLine="false"
                android:gravity="top"
                android:background="#E0E0E0"/>
        </LinearLayout>
        
        
    </LinearLayout>
</LinearLayout>

string resources of "test" is needed, read HERE.
Diposting oleh di 13.38 0 komentar
Selasa, 07 April 2015
Example to set fonts for Android

Example to set fonts for Android

How to set fonts (Typeface and style) on Android using xml and programmatically. 



package com.example.androidfront;

import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
import android.widget.Spinner;
import android.graphics.Typeface;
import android.os.Bundle;

public class MainActivity extends ActionBarActivity {
 
 String typeFaceName[] = {
  "DEFAULT",
  "DEFAULT_BOLD",
  "MONOSPACE",
  "SANS_SERIF",
  "SERIF"};
 
 Typeface typeFace[] = {
   Typeface.DEFAULT,
   Typeface.DEFAULT_BOLD,
   Typeface.MONOSPACE,
   Typeface.SANS_SERIF,
   Typeface.SERIF};

 CheckBox checkBold, checkItalic;
 Spinner selTypeFace;
 EditText editArea;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  editArea = (EditText)findViewById(R.id.editarea);
  
  checkBold = (CheckBox)findViewById(R.id.boldsel);
  checkBold.setOnCheckedChangeListener(new OnCheckedChangeListener(){

   @Override
   public void onCheckedChanged(CompoundButton buttonView,
     boolean isChecked) {
    updateFonts();
   }});
  
  checkItalic = (CheckBox)findViewById(R.id.italicsel);
  checkItalic.setOnCheckedChangeListener(new OnCheckedChangeListener(){

   @Override
   public void onCheckedChanged(CompoundButton buttonView,
     boolean isChecked) {
    updateFonts();
   }});
  
  selTypeFace = (Spinner)findViewById(R.id.typefacesel);
  ArrayAdapter<String> adapter = 
   new ArrayAdapter<String>(this, 
    android.R.layout.simple_spinner_item, typeFaceName);
  adapter.setDropDownViewResource(
    android.R.layout.simple_spinner_dropdown_item);
  selTypeFace.setAdapter(adapter);
  selTypeFace.setOnItemSelectedListener(new OnItemSelectedListener(){

   @Override
   public void onItemSelected(AdapterView<?> parent, View view,
     int position, long id) {
    updateFonts();
   }

   @Override
   public void onNothingSelected(AdapterView<?> parent) {}});

 }
 
 private void updateFonts(){
  int tfSel = selTypeFace.getSelectedItemPosition();
  Typeface tf = typeFace[tfSel];
  editArea.setTypeface(tf);
  
  int style;
  
  if(!checkBold.isChecked() && !checkItalic.isChecked()){
   style = Typeface.NORMAL;
  }else if(checkBold.isChecked() && !checkItalic.isChecked()){
   style = Typeface.BOLD;
  }else if(!checkBold.isChecked() && checkItalic.isChecked()){
   style = Typeface.ITALIC;
  }else{
   style = Typeface.BOLD_ITALIC;
  }

  editArea.setTypeface(tf, style);
 }

}

<LinearLayout 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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.androidfront.MainActivity"
    android:orientation="vertical" >
    
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="android-coding.blogspot.com"
        android:textSize="24dp"
        android:textStyle="bold" />
    
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal" >
        
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical" >
            
            <TextView
                android:typeface="normal"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/test"/>
            <TextView
                android:typeface="monospace"
                android:textStyle="bold"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/test"/>
            <TextView
                android:typeface="sans"
                android:textStyle="italic"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/test"/>
            <TextView
                android:typeface="serif"
                android:textStyle="bold|italic"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/test"/>
            
        </LinearLayout>
        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical" >
            
            <Spinner
                android:id="@+id/typefacesel"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"/>
            <CheckBox 
                android:id="@+id/boldsel"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="BOLD"/>
            <CheckBox 
                android:id="@+id/italicsel"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="ITALIC"/>
            <EditText
                android:id="@+id/editarea"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:singleLine="false"
                android:gravity="top"
                android:background="#E0E0E0"/>
        </LinearLayout>
        
        
    </LinearLayout>
</LinearLayout>

Add <string name="test"> in /res/values/strings.xml.
<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">AndroidFront</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>
    <string name="test">ABCDEfghijKLMNOpqrstUVWXYz1234567890</string>
</resources>
Diposting oleh di 17.40 0 komentar
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