遇到Failed binder transaction错误

Question

在编写从网络下载图片的程序时，遇到了Failed binder transaction。在onPostExecute()方法中有如下代码片段Bitmap bitmap = BitmapFactory.decodeByteArray(result, 0, result.length); //跟新ImageView imageBox.setImageBitmap(bitmap);。我猜想是不是这里出了问题。Google了一下，说是图片的大小不能超过40k，于是我换了一张小于40k的图片。但是不但没解决，反而又出了另一个错误：

这里贴出主要代码，以便大家帮忙给出建议和解决办法。

package com.example.asyncmessagehandler;

import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity {
    private Button download = null;
    private ImageView imageBox = null;
    private ProgressDialog progressDialog;
    public static final String IMAGE_PATH = "http://a0.att.hudong.com/15/37/20300415460903132947371591450.gif";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        download = (Button)findViewById(R.id.download);
        imageBox = (ImageView)findViewById(R.id.img);

        progressDialog = new ProgressDialog(MainActivity.this);
        progressDialog.setTitle("提示信息");
        progressDialog.setMessage("正在下载, 请稍后...");
        //不允许手动取消这个弹出框
        progressDialog.setCancelable(false);
        //设置ProgressDialog的样式是圆圈
        progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        download.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                //在UI Thread当中实例化AsyncTask对象，并调用execute方法
                new MyAsyncTask().execute(IMAGE_PATH);
            }
        });
    }

    public class MyAsyncTask extends AsyncTask<String, Integer, byte[]>{
        @Override
        protected void onPreExecute() {
            // TODO Auto-generated method stub
            super.onPreExecute();
            progressDialog.show();
        }
        @Override
        protected byte[] doInBackground(String... params) {
            // TODO Auto-generated method stub
            HttpClient httpClient = new DefaultHttpClient();
            HttpGet httpGet = new HttpGet(params[0]);
            byte[] images = new byte[]{};
            try {
                HttpResponse response = httpClient.execute(httpGet);
                HttpEntity httpEntity = response.getEntity();

                if(httpEntity != null && response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
                    images = EntityUtils.toByteArray(httpEntity);
                }
            } catch (ClientProtocolException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }finally{
                //关闭连接
                httpClient.getConnectionManager().shutdown();
            }
            return images;
        }
        @Override
        protected void onProgressUpdate(Integer... values) {
            // TODO Auto-generated method stub
            super.onProgressUpdate(values);
        }
        @Override
        protected void onPostExecute(byte[] result) {
            // TODO Auto-generated method stub
            super.onPostExecute(result);
            //将doInBackground方法返回的byte[]解码成要给Bitmap
            Bitmap bitmap = BitmapFactory.decodeByteArray(result, 0, result.length);
            //跟新ImageView
            imageBox.setImageBitmap(bitmap);
            //progressDialog消失
            progressDialog.dismiss();
        }

    }
}

Answer 1

建议你使用xutil