import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends Activity {
    private ProgressDialog dialog;
    private Button button;
    private ImageView imageView;
    private String image_path = "http://i1.juyouqu.com/uploads/content//2014/04/1396611698344.jpg!w598";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        dialog = new ProgressDialog(this);
        dialog.setTitle("提示");
        dialog.setMessage("正在下载.......");
        dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
//      dialog.show();
        button = (Button)findViewById(R.id.button1);
        imageView = (ImageView)findViewById(R.id.imageView1);
        button.setOnClickListener(new View.OnClickListener() {
          
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                new MyTask().execute(image_path);
            }
        });
    }
    public class MyTask extends AsyncTask<String, Integer, Bitmap>
    {
        @Override
        protected void onPreExecute() {
            // TODO Auto-generated method stub
            super.onPreExecute();
            dialog.show();
        }
        @Override
        protected Bitmap doInBackground(String... params) {
            // TODO Auto-generated method stub
            Bitmap bitmap = null;
            ByteArrayOutputStream output = new ByteArrayOutputStream();
            InputStream input = null;
              
            try {
                HttpClient httpClient = new DefaultHttpClient();
                HttpGet httpGet = new HttpGet(params[0]);
                HttpResponse httpResponse = httpClient.execute(httpGet);
                if (httpResponse.getStatusLine().getStatusCode() == 200) {
                      
                    input = httpResponse.getEntity().getContent();
                    long file_length = httpResponse.getEntity().getContentLength();
                    int len = 0;
                    byte[] data = http://www.mamicode.com/new byte[1024];>