Factory images of Jelly Bean for Galaxy Nexus and Nexus S released

Factory Images for Nexus Devices updated with Factory images of Jelly Bean for Galaxy Nexus and Nexus S.

You will find these files useful if you have used the Android Open-Source Project, flashed custom builds on your device, and wish to return that device to its factory state.

Gallery-like single column GridView

by changing android:numColumns="1", the last exercise of "GridView" can be modified to a Gallery-like single column GridView.

<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="horizontal">
    <GridView
        android:id="@+id/gridview"
        android:layout_width="130dp" 
        android:layout_height="fill_parent"
        android:columnWidth="90dp"
        android:numColumns="1"
        android:verticalSpacing="10dp"
        android:horizontalSpacing="10dp"
        android:stretchMode="columnWidth"
        android:gravity="center"
        android:background="@android:color/background_dark"/>
    <LinearLayout 
        android:layout_width="match_parent"
        android:layout_height="match_parent" 
        android:orientation="vertical"
        android:background="@android:color/background_light">
 </LinearLayout>
</LinearLayout>

GridView loading photos from SD Card

Previous exercises described how to implement "Gallery-like HorizontalScrollView" and "Vertical Gallery-like ScrollView". Alternatively, it can be displayed in GridView.

Add a <GridView> in layout.

<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">

    <GridView
        android:id="@+id/gridview"
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent"
        android:columnWidth="90dp"
        android:numColumns="auto_fit"
        android:verticalSpacing="10dp"
        android:horizontalSpacing="10dp"
        android:stretchMode="columnWidth"
        android:gravity="center"/>

</LinearLayout>

Main code:

package com.example.androidgridview;

import java.io.File;
import java.util.ArrayList;

import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {

    public class ImageAdapter extends BaseAdapter {
     
     private Context mContext;
     ArrayList<String> itemList = new ArrayList<String>();
     
     public ImageAdapter(Context c) {
      mContext = c; 
     }
     
     void add(String path){
      itemList.add(path); 
     }

  @Override
  public int getCount() {
   return itemList.size();
  }

  @Override
  public Object getItem(int arg0) {
   // TODO Auto-generated method stub
   return null;
  }

  @Override
  public long getItemId(int position) {
   // TODO Auto-generated method stub
   return 0;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
   ImageView imageView;
         if (convertView == null) {  // if it's not recycled, initialize some attributes
             imageView = new ImageView(mContext);
             imageView.setLayoutParams(new GridView.LayoutParams(220, 220));
             imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
             imageView.setPadding(8, 8, 8, 8);
         } else {
             imageView = (ImageView) convertView;
         }

         Bitmap bm = decodeSampledBitmapFromUri(itemList.get(position), 220, 220);

         imageView.setImageBitmap(bm);
         return imageView;
  }
  
  public Bitmap decodeSampledBitmapFromUri(String path, int reqWidth, int reqHeight) {
   
   Bitmap bm = null;
   // First decode with inJustDecodeBounds=true to check dimensions
   final BitmapFactory.Options options = new BitmapFactory.Options();
   options.inJustDecodeBounds = true;
   BitmapFactory.decodeFile(path, options);
       
   // Calculate inSampleSize
   options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
       
   // Decode bitmap with inSampleSize set
   options.inJustDecodeBounds = false;
   bm = BitmapFactory.decodeFile(path, options); 
       
   return bm;   
  }
  
  public int calculateInSampleSize(
    
   BitmapFactory.Options options, int reqWidth, int reqHeight) {
   // Raw height and width of image
   final int height = options.outHeight;
   final int width = options.outWidth;
   int inSampleSize = 1;
   
   if (height > reqHeight || width > reqWidth) {
    if (width > height) {
     inSampleSize = Math.round((float)height / (float)reqHeight);    
    } else {
     inSampleSize = Math.round((float)width / (float)reqWidth);    
    }   
   }
   
   return inSampleSize;    
  }

 }
    
    ImageAdapter myImageAdapter;

 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        GridView gridview = (GridView) findViewById(R.id.gridview);
        myImageAdapter = new ImageAdapter(this);
        gridview.setAdapter(myImageAdapter);
        
        String ExternalStorageDirectoryPath = Environment
          .getExternalStorageDirectory()
          .getAbsolutePath();
        
        String targetPath = ExternalStorageDirectoryPath + "/test/";
        
        Toast.makeText(getApplicationContext(), targetPath, Toast.LENGTH_LONG).show();
        File targetDirector = new File(targetPath);
        
        File[] files = targetDirector.listFiles();
        for (File file : files){
         myImageAdapter.add(file.getAbsolutePath());
        } 
    }

}

Download the files.

Next:
- Gallery-like single column GridView
- Retrieve old activity state for configuration change by overriding onRetainNonConfigurationInstance() method

Multiple $(document).ready(function() with JQuery

Did you know you can call JQuery's $(document).ready(function() multiple times? Well yes, you can according to the documentation.



I have playing with templating systems for both Abbey Workshop and Blue Sky Workshop. With those systems, I typically have some JQuery code in the header of the template. Consequently, that code is on every page. But what if you want to add some more JavaScript that does something completely different? Well no problem, just add to the content to the page and add a <script> tag wherever you want it. Pretty cool!

Mac OS X Mountain Lion (10.8) is out

It's here! Mac OS X Mountain Lion is available on the Mac App Store. CNET has a review.A lot more iOS and iCloud integration. So apps like iMessage and Reminder will also be on your desktop, making them a lot more useful.



As always, I will be waiting for the first major patch before I start installing it.

Sea Change for Big Networks?

VMWare's $1B purchase of Nicira Networks was big news. Why? That was my question. Remember that new OpenFlow technology for managing large networks? Well Nicira is one of the first companies to build a product based on OpenFlow. This technology is aimed directly at Cisco and Juniper networks. One of the original investors explains.



Now if the big guys are smart, they will quickly embrace this technology and come out with their own products and thusly crush their smaller competitors. It will be interesting to see if that happens.

Internet Usage by Operating System

I found this interesting so I thought I would share:

Usage share of Operating Systems



For my next project at work, I was wondering what operating system to use for any activities. The original course, which this content is based off of, was written for Solaris. But I can't imagine most potential students would have that. So one way of determining operating system usage is to look at statistics gathered by browsers. So the link shows that data for Wikipedia and some other sites that gather these sort of statistics.



Some observations:

• Windows usage is still around around 70% with most users on Windows 7 and XP.


• iPhone plus iPad plus Android share is already over 10%. Smaller than I thought it would be, but if you think world wide usage it makes a lot of sense. Smart phones and tablets are just beginning to penetrate everywhere. And tablets are really gonna take off with 7" form factors and $200 list prices like the Google Nexus 7.


• Mac OS X combined with Linux is only around 10%.

As another data point, I looked at the stats from one of my web sites (abbeyworkshop.com) to see what the geeks are using during the last year. Windows is still strong at 62%, but Mac OS X plus Linux jumps up to 36%. Way to go geeks!



Anyway, it looks like Windows 7 and XP are still my primary targets. But maybe I should think about Linux in the future.