android自定义相册的功能实现

做java开发的也会接触到android开发。前段时间我在做android开发时候遇到一个问题就是自定义相册。

其实简单来说分两步：第一，先查询出本机所有图片的路径。第二，把查询出的路径放到GridView控件里面。

接下来上具体的代码了：

1.取图片路径：

       /**
      * 图片文件路径
   */
   private ArrayList<String> filePath = new ArrayList<String>();

       /**
       * 查询系统所有图片地址
        */
   private void serchPhoto() {
       filePath.clear();
       new Thread(new Runnable() {
           @Override
           public void run() {
               Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
               ContentResolver mContentResolver = getContentResolver();
               // 只查询jpeg和png的图片
               Cursor mCursor = mContentResolver.query(mImageUri, null,
                       MediaStore.Images.Media.MIME_TYPE + "=? or "
                               + MediaStore.Images.Media.MIME_TYPE + "=?"
                               + " or " + MediaStore.Images.Media.MIME_TYPE
                               + "=?", new String[]{"image/jpeg",
                               "image/png", "image/jpg"},
                       MediaStore.Images.Media.DATE_MODIFIED);

               Log.e("TAG", mCursor.getCount() + "===" +filePath.toString());
               while (mCursor.moveToNext()) {
                   // 获取图片的路径
                   String path = mCursor.getString(mCursor
                           .getColumnIndex(MediaStore.Images.Media.DATA));
                   Log.v("dongjie", "path==" + path);
                   filePath.add(path);
               }
               mCursor.close();
               Message msg = Message.obtain();
               //msg.obj = json;
               msg.what = 0x110;
               handler.sendMessage(msg);
           }
       }).start();
   }

2.新建一个photoActivity 再新建一个对应的adpter适配器MoreChatAdpter 还有布局文件photo.xml

photo.xml :

MoreChatAdpter.java :

             /**
* 相册适配器
* @author dongkaiming
*/
public class MoreChatAdpter extends BaseAdapter {

   public List<String> filePath;

   private LayoutInflater layoutInflater;
   private Context context;

   public MoreChatAdpter(Context context, List<String> filePath) {
       layoutInflater = LayoutInflater.from(context);
       this.filePath = filePath;
       this.context = context;
   }

   @Override
   public int getCount() {
       if (filePath == null) {
           return 1;
       }
       return filePath.size() + 1;
   }

   @Override
   public Object getItem(int position) {
       // TODO Auto-generated method stub
       return filePath.get(position);
   }

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

   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
       HolderView holderView = null;
       if (convertView == null) {
           holderView = new HolderView();
           convertView = layoutInflater.inflate(R.layout.grid_item, null);
           holderView.photoImage = (ImageView) convertView
                   .findViewById(R.id.id_item_image);
           holderView.selectImage = (ImageView) convertView
                   .findViewById(R.id.id_select_item);
           holderView.img_camner= convertView.findViewById(R.id.img_camner);
           setHeight(holderView.photoImage);
           convertView.setTag(holderView);
       }
           holderView = (HolderView) convertView.getTag();
           if(position==0){
               holderView.img_camner.setVisibility(View.VISIBLE);
               setHeight(holderView.img_camner);
           }else{
               File file = new File(filePath.get(position-1));
               Glide.with(context).load(file).centerCrop().crossFade()
               .into(holderView.photoImage);
               holderView.img_camner.setVisibility(View.GONE);
           }
               return convertView;
   }

   /**
   * 设值每张相片的高度
   * @param view
   */
   public void setHeight(View view) {
       LayoutParams layoutParams = (LayoutParams) view.getLayoutParams();
       layoutParams.height = getLayoutHeight();
       view.setLayoutParams(layoutParams);
   }

   public void setWidth(View view){
       LayoutParams layoutParams = (LayoutParams) view.getLayoutParams();
       layoutParams.width = getLayoutWidth();
       view.setLayoutParams(layoutParams);
   }

   /**
   * 预设值每张相片的高度
   */
   public int getLayoutHeight() {
       int width = Tools.getScreenWidth() - 2 * 4;
       return width / 4;
   }

   public int getLayoutWidth(){
       int width = Tools.getScreenWidth() - 2 * 4;
       return width / 4;
   }

    /**
     * view mode
     * @author dongkaiming
     */
   public class HolderView {
       public ImageView photoImage;
       public ImageView selectImage;
       public View img_camner;

   }

}

最后在photoActivity.java 里的onCreate()方法里面实例化MoreChatAdpter并传入对应的参数即可。

path = intent.getStringArrayListExtra("path"); //path就是上面查询的图片路径。

MoreChatAdpter moreChatAdpter = new MoreChatAdpter(this, path);

好了，就是这样，请大家指教！

android自定义相册的功能实现

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