Android Open Source - SimpleReader Local Image Browse Activity

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Back to project page SimpleReader.

License

The source code is released under:

Apache License

Java Source Code

package com.dreamteam.app.ui;
//from   w  ww  .j  a v  a  2 s.c  o m
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import android.annotation.SuppressLint;
import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.Toast;

import com.dreamteam.app.utils.FileUtils;
import com.dreamteam.app.wallpaper.GroupGridAdapter;
import com.dreamteam.app.wallpaper.ImageBean;
import com.dreateam.app.ui.R;

@SuppressLint("HandlerLeak")
public class LocalImageBrowseActivity extends BaseTitledActivity {
  private static final int SUCCESS = 0;
  private HashMap<String, List<String>> groups;
  private List<ImageBean> groupImageList;
  private GridView gridView;
  private ProgressDialog pd;
  
  private Handler handler = new Handler() {
    public void handleMessage(android.os.Message msg) {
      switch(msg.what) {
      case SUCCESS:
        pd.dismiss();
        gridView.setAdapter(new GroupGridAdapter(LocalImageBrowseActivity.this, groupImageList, gridView));
        break;
      }
    };
  };

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    initParam();
    initView();
    initData();
  }

  private void initParam() {
    groups = new HashMap<String, List<String>>();
    groupImageList = new ArrayList<ImageBean>();
  }

  private void initView() {
    setView(R.layout.activity_local_image_browse);
    gridView = (GridView) findViewById(R.id.local_image_browse_grid);
    setTitleText(R.string.wallpaper_local_img_browse);
    setLeftButtonListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        finish();
      }
    });

    hideRightButton();
    
    gridView.setOnItemClickListener(new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> parent, View view,
          int position, long id) {
        List<String> childList = groups.get(groupImageList.get(position).getFolderName());
        
        Intent mIntent = new Intent(LocalImageBrowseActivity.this, ImagesBrowseActivity.class);
        mIntent.putStringArrayListExtra("data", (ArrayList<String>)childList);
        startActivity(mIntent);
      }
    });
  }

  private void initData() {
    if (!FileUtils.hasSDCard()) {
      Toast.makeText(this, "cannot found sd card", Toast.LENGTH_SHORT)
          .show();
      return;
    }

    pd = ProgressDialog.show(this, "info",
        "loing local images, please wait...");

    new Thread(new Runnable() {
      @Override
      public void run() {
        Uri imageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
        ContentResolver resolver = getContentResolver();
        Cursor cursor = resolver.query(imageUri, null,
            MediaStore.Images.Media.MIME_TYPE + "=? or "
                + MediaStore.Images.Media.MIME_TYPE + "=?",
            new String[] { "image/jpeg", "image/png" },
            MediaStore.Images.Media.DATE_MODIFIED);
        while(cursor.moveToNext()) {
          String path = cursor.getString(cursor
              .getColumnIndex(MediaStore.Images.Media.DATA));
          
          String parentName = new File(path).getParentFile().getName();
          
          if (!groups.containsKey(parentName)) {
            List<String> chileList = new ArrayList<String>();
            chileList.add(path);
            groups.put(parentName, chileList);
          } else {
            groups.get(parentName).add(path);
          }
        }
        
        cursor.close();
        
        groupImageList = subGroupOfImage(groups);
        handler.sendEmptyMessage(SUCCESS);
      }
    }).start();
  }
  
  /**
   * ????????GridView??????????????????????????????HashMap?
   * ?????????HashMap?????????List
   * 
   * @param mGruopMap
   * @return
   */
  private List<ImageBean> subGroupOfImage(HashMap<String, List<String>> mGruopMap){
    if(mGruopMap.size() == 0){
      return null;
    }
    List<ImageBean> list = new ArrayList<ImageBean>();
    
    Iterator<Map.Entry<String, List<String>>> it = mGruopMap.entrySet().iterator();
    while (it.hasNext()) {
      Map.Entry<String, List<String>> entry = it.next();
      ImageBean mImageBean = new ImageBean();
      String key = entry.getKey();
      List<String> value = entry.getValue();
      
      mImageBean.setFolderName(key);
      mImageBean.setImageCounts(value.size());
      mImageBean.setTopImagePath(value.get(0));//????????????
      
      list.add(mImageBean);
    }
    
    return list;
    
  }
}

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