Android Open Source - collage-lwp Path Dialog

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License

The source code is released under:
Apache License
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Java Source Code

package pohkahkong.livewallpaper.collage;
/*from   w  w  w  .  j a v a  2 s  .  c om*/
import java.util.ArrayList;

import android.app.Dialog;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.os.Environment;
import android.preference.Preference;
import android.preference.PreferenceManager;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.GridView;
import android.widget.TextView;

/**
 * 
 * @author Poh Kah Kong
 *
 */
public class PathDialog extends Dialog implements OnItemClickListener, OnClickListener {
  // general
  private Preferences preferencesActivity;
    private GridView galleryGV;
    private Button selectBtn;
    private TextView folderTV;
    private Preference preference;
    private ImageItem[] itemsArray;
  private int count;
    
    // preferences
  private SharedPreferences preferences;
  private String externalSdPath;
  private String key = "path";
    private String path;


  public PathDialog(Preferences preferencesActivity, Preference preference) {
    super(preferencesActivity, android.R.style.Theme_Light);
    this.preferencesActivity = preferencesActivity;
    this.preference = preference;
    setContentView(R.layout.path);    
    setTitle("Choose folder");
    
    preferences = PreferenceManager.getDefaultSharedPreferences(preferencesActivity);
    externalSdPath = Environment.getExternalStorageDirectory().getPath();
    path = preferences.getString(key, externalSdPath);  
    preference.setSummary(path);    
    
    galleryGV = (GridView) findViewById(R.id.galleryGV);
    selectBtn = (Button)  findViewById(R.id.selectBtn);
    folderTV = (TextView)  findViewById(R.id.folderTV);    
    
    initGridView();
    galleryGV.setOnItemClickListener(this);
    selectBtn.setOnClickListener(this);
  }
  
  private void initGridView() {
    ArrayList<ImageItem> items = new ArrayList<ImageItem>();
    try {
      final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID };
      final String orderBy = MediaStore.Images.Media._ID;
      Cursor imagecursor = preferencesActivity.managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, 
          columns, null, null, orderBy);
      int image_column_index = imagecursor.getColumnIndex(MediaStore.Images.Media._ID);
      count = imagecursor.getCount();

      ArrayList<String> paths = new ArrayList<String>();
      for (int i = 0; i < count; i++) {      
        imagecursor.moveToPosition(i);
        int id = imagecursor.getInt(image_column_index);
        int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
        String path = imagecursor.getString(dataColumnIndex);
        if (i==0 || (!path.substring(path.length()-4).equalsIgnoreCase(".png") && !paths.contains(getParentPath(path)))) {
          Log.i("PathDialog", getParentPath(path));  
          Bitmap thumbnail = MediaStore.Images.Thumbnails.getThumbnail(preferencesActivity.getApplicationContext().getContentResolver(), id, MediaStore.Images.Thumbnails.MICRO_KIND, null);        
          items.add(new ImageItem(thumbnail, getParentPath(path)));    
          paths.add(getParentPath(path));
        }                      
      }
      imagecursor.close();
    } catch (Exception e) {      
    }
    itemsArray = new ImageItem[items.size()];
    items.toArray(itemsArray);    
    galleryGV.setAdapter(new ImageAdapter(preferencesActivity, itemsArray));    
  }
  
  private String getParentPath(String path) {
      return path.substring(0, path.lastIndexOf("/"));
    }

  public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    // TODO Auto-generated method stub
    path = itemsArray[position].getPath();
    folderTV.setText(path.substring(path.lastIndexOf("/")+1, path.length()));
  }

  public void onClick(View view) {
    // TODO Auto-generated method stub
    if (view.getId()==R.id.selectBtn) {
      Editor editor = preferences.edit();
      editor.putString(key, path);
      editor.commit();
      preference.setSummary(path);
      hide();      
    }
  }
}
Java Source Code List
