LoadLocalBigImgTask.java

package com.juns.wechat.chat.task;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.view.View;
import android.widget.ProgressBar;

import com.easemob.util.ImageUtils;
import com.juns.wechat.R;
import com.juns.wechat.chat.utils.ImageCache;
import com.juns.wechat.widght.TouchImageView.TouchImageView;

public class LoadLocalBigImgTask extends AsyncTask<Void, Void, Bitmap> {

	private ProgressBar pb;
	private TouchImageView photoView;
	private String path;
	private int width;
	private int height;
	private Context context;

	public LoadLocalBigImgTask(Context context, String path,
			TouchImageView photoView, ProgressBar pb, int width, int height) {
		this.context = context;
		this.path = path;
		this.photoView = photoView;
		this.pb = pb;
		this.width = width;
		this.height = height;
	}

	@Override
	protected void onPreExecute() {
		super.onPreExecute();
		int degree = ImageUtils.readPictureDegree(path);
		if (degree != 0) {
			pb.setVisibility(View.VISIBLE);
			photoView.setVisibility(View.INVISIBLE);
		} else {
			pb.setVisibility(View.INVISIBLE);
			photoView.setVisibility(View.VISIBLE);
		}

	}

	@Override
	protected Bitmap doInBackground(Void... params) {
		Bitmap bitmap = ImageUtils.decodeScaleImage(path, width, height);
		return bitmap;
	}

	@Override
	protected void onPostExecute(Bitmap result) {
		super.onPostExecute(result);
		pb.setVisibility(View.INVISIBLE);
		photoView.setVisibility(View.VISIBLE);
		if (result != null)
			ImageCache.getInstance().put(path, result);
		else
			result = BitmapFactory.decodeResource(context.getResources(),
					R.drawable.default_image);
		photoView.setImageBitmap(result);
	}
}