android 经过uri截取指定大小的图片显示在imageview上

android 通过uri截取指定大小的图片显示在imageview上

在gridview的adapter中设置

public class GridViewAdapter extends BaseAdapter {

	protected List<Map<String, Object>> mlist;
	protected Context mContext;
	protected LayoutInflater mInflater = null;

	public GridViewAdapter(Context context, List<Map<String, Object>> list) {
		mlist = list;
		mContext = context;
		mInflater = LayoutInflater.from(context);
	}

	@Override
	public int getCount() {
		// TODO Auto-generated method stub
		return mlist.size();
	}

	@Override
	public Object getItem(int position) {
		// TODO Auto-generated method stub
		return mlist.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) {
		// TODO Auto-generated method stub
		ViewHolder viewHolder = null;
		if (null == convertView) {
			viewHolder = new ViewHolder();
			convertView = mInflater.inflate(R.layout.item_gridview, null);
			viewHolder.imageButton = (ImageButton) convertView
					.findViewById(R.id.imageButton1);
			viewHolder.imageView = (ImageView) convertView
					.findViewById(R.id.imageView1);
			convertView.setTag(viewHolder);
		} else {
			viewHolder = (ViewHolder) convertView.getTag();
		}

		if (!mlist.get(position).get("drawable").equals("") && mlist.size() < 6) {
			viewHolder.imageView
					.setImageResource(R.drawable.app_panel_add_icon_normal);
			viewHolder.imageButton.setVisibility(View.GONE);

		} else { //自动裁剪出制定大小的图片显示在imageview上
			ContentResolver contentProvider = mContext.getContentResolver();
			Uri uri01 = (Uri)mlist.get(position).get("uri");
			Bitmap mBitmap = null;
			try {
				Bitmap bmp = BitmapFactory.decodeStream(contentProvider.openInputStream(uri01));
				mBitmap = Bitmap.createScaledBitmap(bmp, 100, 100, true);
			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}			
			
			viewHolder.imageView.setImageBitmap(mBitmap);
//			viewHolder.imageView.setImageURI((Uri) (mlist.get(position)
//					.get("uri")));
			viewHolder.imageButton.setVisibility(View.VISIBLE);
			
			
		}
		final int i = position;
		viewHolder.imageButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if (mlist.size() == 5
						&& mlist.get(4).get("drawable").equals("")) {
					Map<String, Object> map = new HashMap<String, Object>();
					map.put("drawable", R.drawable.ic_launcher);
					mlist.add(map);
				}
				mlist.remove(i);
				GridViewAdapter.this.notifyDataSetChanged();
			}
		});

		return convertView;
	}

	static class ViewHolder {
		ImageView imageView;
		ImageButton imageButton;
	}

}