[OSX] Convert BIG5 file to UTF8

I have been trying to transform my works from Windows to OSX.  However, in a addition to a powerful text editor (like Notepad++ on Windows), the most difficult things to me is how to open the files encoding in BIG5 which is what Windows uses for encoding traditional Chinese.

The simplest way to convert the Big5 files to utf8 might be using an embedded converter.

Open Terminal and type this
iconv -f big5 -t utf8 [your_input_file] > [your_output_file]


EDIT: I have found some useful text editors to do conversion.

In general:
1. Enable Big5 encoding character set in preference.
2. Open the Big5 files using the interface.
3. Save the file as UTF8.

TextWrangler
1. Enable Big5
2. File->Open..., read as Big5
3. File->Save as..., Encoding UTF8

A simpler way:
1. Enable Big5
2. Drag and drop
3. File->Reopen Using Encoding..., Big5
    (Or, click on the toolbar below text editing area)
4. Save


Fraiser(Smultron)
Similar to TextWrangler, open the file using Big5, then
Text->Reload Text Using Encoding..., UTF8,
and save.

[Eclipse] Change Android application name in Eclipse

I had tried to change the application name by modified the Manefist.xml directly. But it led me a lot off error.

To fix this, I recommend you do it with the interface:

1. Right click on your project
2. Down to "Android Tools"
3. Click on "Rename Application Package"


And this is called "refactoring", that is, automatically adjust all the reference that related to your modification.

[Eclipse] Project has no project.properties file! Edit the project properties to set one.

When you import a project into Eclipse and get a error message like this:

Project has no project.properties file! Edit the project properties to set one.

To solve it, just restart the Eclipse IDE.

[Andriod] Custom dialog with gridview

Task: To improve the user-experience, I 'd like to make a dialog contains options with icons and text, and manage them in grid rather than column of options.


key components: AlertDialog, LayoutInflater, GridView, Adapter

General Conception

step  1: Put custom view in the dialog - Dialog, LayoutInflater.
step  2: Manage your grid of options - GridView, Adapter.

Technical Conception

step  1: Use LayoutInflater to load the custom layout, which contains your GridView.
step  2: Use your own Adapter to manage your GridView.
step  3: Define the behavior when users choose one of the options.
step  4: Use AlertDialog.Builder to set the view to the dialog as custom layout.

Practical steps 

 File used in this tutorial:

1. customdialog.xml: That is what will be shown in your dialog, add a GridView here.
2. customcontent.xml: The format of every option in your grid, put an ImageView with any icon and a TextView under it.
note:  You can choose another arrangement you want, I put the text under a icon here
3. customIconGridActivity.java: Your main activity.
4. main.xml: put a button to launch the function
5. Icons your wish to show on your options, store them under res/drawable
    In this tutorial, I put three picture:cat.png, yao.png, and spider.png under res/drawable-mdpi

As a tutorial, I add all the object with Eclipse GUI and keep the default id such as imageView1, textView1, etc.
   

Code

customIconGridActivity.java
-------------------------------------

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
/*
 *
step  1: Use LayoutInflater to load the custom layout, which contains your GridView.
step  2: Use your own Adapter to manage your GridView.
step  3: Define the behavior when users choose one of the options.
step  4: Use AlertDialog.Builder  to set the view to the dialog as custom layout.
 */
public class CustomIconGridActivity extends Activity {
    Context m_context = this;
    Dialog  m_dialog;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
      
        Button myButton = (Button) findViewById(R.id.button1);
        myButton.setOnClickListener(new OnClickListener(){

            public void onClick(View v) {
                // TODO Auto-generated method stub
                showDialog(0);
            }
      
        });
    }

    @Override
    protected Dialog onCreateDialog(int id) {
        // TODO Auto-generated method stub
        //step 1:Load custom dialog layout
        LayoutInflater myInflater = LayoutInflater.from(m_context);
        View myView = myInflater.inflate(R.layout.customdialog, null);
      
      
        GridView gv = (GridView) myView.findViewById(R.id.gridView1);
        //step 2: Set self-defined ImageAdaper to our gridview
        gv.setAdapter(new ImageAdapter(m_context));
              
        //step 3: Set up the behavior when user touches an item in the grid
        gv.setOnItemClickListener(new GridView.OnItemClickListener(){

            public void onItemClick(AdapterView<?> parent, View v,int position, long id)
            {
              
                // TODO Auto-generated method stub
                Toast.makeText(v.getContext(), "Position is "+position, Toast.LENGTH_SHORT).show();
                //remove this statement if you want keep the dialog after user touched
                m_dialog.dismiss();
            }
          
        });
      
        //step 4: Set the custom view to the AlertDialog      
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("choose a context");
        builder.setView(myView);
      
        m_dialog = builder.create();
      
        return m_dialog;
    }
  
 
  
    public class ImageAdapter extends BaseAdapter {   
        private Context mContext;
        private LayoutInflater mInflater;
        public ImageAdapter(Context c) { 
            mInflater = LayoutInflater.from(c);
            mContext = c;   
        }   
        public int getCount() {   
            return mThumbIds.length;   
        }   
        public Object getItem(int position) {   
            return null;   
        }   
        public long getItemId(int position) {   
            return 0;   
        }   
        // create a new ImageView for each item referenced by the index

        public View getView(int position, View convertView, ViewGroup parent) {
            //ViewHolder is a self-defined class, and every instance is consisted of an icon and a text
            ViewHolder holder;
            if (convertView == null) {  // if it's not recycled,   

                convertView = mInflater.inflate(R.layout.customcontent, null);
                //convertView.setLayoutParams(new GridView.LayoutParams(90, 90));
                holder = new ViewHolder();
              
                //set any text and pic on the views, they will be replaced later
                holder.title = (TextView) convertView.findViewById(R.id.textView1);
                holder.icon = (ImageView )convertView.findViewById(R.id.imageView1);
              
                convertView.setTag(holder);
              
            } else {
                holder = (ViewHolder) convertView.getTag();
            }
            holder.icon.setAdjustViewBounds(true);
            //holder.icon.setScaleType(ImageView.ScaleType.CENTER_CROP);   
            holder.icon.setPadding(8, 8, 8, 8);
            holder.title.setText(categoryContent[position]);
            holder.icon.setImageResource(mThumbIds[position]);
            return convertView;   
        }   
        class ViewHolder {
            TextView title;
            ImageView icon;
        }
        // references to our images   
        private Integer[] mThumbIds = {   
                R.drawable.spider, R.drawable.yao,R.drawable.cat, 
                R.drawable.spider, R.drawable.yao,R.drawable.cat,
                R.drawable.yao
        };


        private String[] categoryContent = {   
                "spider0", "yao1", "cat2",
                "spider3", "yao4", "cat5",
                "yao6"

        };

    }
  
}



reference: http://iserveandroid.blogspot.com/2010/12/custom-gridview-in-dialog.html

[Android] List file with filter

I have posted another article on Java, but it fails with I apply it on Android, so I use this in my Android apps.




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

public class FileHelper

{

    public static List<File> fetchFileList(String directoryName, final String fileExtension)

    {


        List<File> fileList = new ArrayList<File>();

        File fileDirectory = new File(directoryName);

       
       
        getDirectoryContent(fileList, fileDirectory, fileExtension);

        return fileList;

    }


    private static void getDirectoryContent(List<File> fileList, File fileDirectory, String fileExtension)

    {

        if (fileDirectory.exists())
        {

            try
            {
                for (File file : fileDirectory.listFiles())

                {

                    //Log.i("FileHelper processing file:", file.getAbsolutePath());

                    if (file.isDirectory())

                        getDirectoryContent(fileList, file, fileExtension);

                    else

                    {

                        String fileName = file.getName();

                        if (fileName.endsWith(fileExtension.toLowerCase()) || fileName.endsWith(fileExtension.toUpperCase()))

                            fileList.add(file);

                    }

                }
            }
            catch(Exception e)
            {
                System.out.println("error at: " + fileDirectory);
            }
           
        }
    }

}

[Note] Online material about CS

I have not found a better way to sync bookmarks on all machines, so I just write down the links here as a note.


http://tomkuo139.blogspot.com/
http://blog.roodo.com/rocksaying
http://www.componentowl.com/blog/2012/02/zen-coder-vs-distraction-junkie/

(OO)
http://milikao.pixnet.net/blog/post/543592
(Design pattern)
http://caterpillar.onlyfun.net/Gossip/DesignPattern/DesignPattern.htm

Android

http://blog.csdn.net/hellogv/article/details/5994952#comments

(AlarmService)
http://android-er.blogspot.com/2010/10/simple-example-of-alarm-service-using.html

(grid view w/ text)
http://tomkuo139.blogspot.com/2010/01/android-gridview-text.html
(Android grid view w/ icons)
http://iserveandroid.blogspot.com/2010/12/custom-gridview-in-dialog.html
(Android ListView w/ icons)
http://blog.joomla.org.tw/android/178-ListView%E4%B9%8B%E4%B8%80%EF%BC%9AAdapter%E4%BB%8B%E7%B4%B9%E8%88%87%E4%BD%BF%E7%94%A8.html

http://blog.sina.com.cn/s/blog_5da93c8f0100wwrd.html

http://blog.csdn.net/hellogv/article/details/4567095

Python 

(sqlite3)
http://www.dreamincode.net/forums/topic/210154-sqlite3-in-python/

[Python] Load json into dict and vice versa

##Load json to dict
f = open('myFile.json','r').read()
#objs is stored in dict form data
obj = json.loads(f)


##Save dict to a json file
testDic = {'a':123,'b':2}
#print type(testDic)
f = open('test2.json', 'w')
json.dump(testDic, f, indent=4)