android:ImageView,访问网上图片并显示出来

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/urlpath" />

    <EditText
        android:id="@+id/urlpath"
        android:text="http://ww1.sinaimg.cn/mw690/6532527agw1ej5sd7j0jgj20eq09u3z5.jpg"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/button" />

    <ImageView
        android:id="@+id/show"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

package com.example.utils;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

public class StreamTool {
	public static byte[] readInputStream(InputStream inStream) throws Exception {
		ByteArrayOutputStream outStream = new ByteArrayOutputStream();// 输出流，写到内存
		byte[] buffer = new byte[1024];// 1K缓冲区容量
		int len = 0;
		while ((len = inStream.read(buffer)) != -1) {
			outStream.write(buffer, 0, len);// 从数组buffer中读取从0到len的数据
		}
		inStream.close();
		return outStream.toByteArray();
	}
}

package com.example.image;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import com.example.utils.StreamTool;

public class ImageService {
	public static byte[] getImage(String path) throws Throwable {
		URL url = new URL(path);
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		conn.setRequestMethod("GET");
		conn.setConnectTimeout(5 * 1000);
		InputStream inStream = conn.getInputStream();// 通过输入流获取图片数据
		return StreamTool.readInputStream(inStream);// 得到的图片的二进制数据
	}
}

package com.example.image;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

public class ImageActivity extends Activity {

	private static final String TAG = "ImageActivity";
	private EditText pathText;
	private ImageView imageView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_image);
		pathText = (EditText) this.findViewById(R.id.urlpath);
		imageView = (ImageView) this.findViewById(R.id.show);
		Button button = (Button) this.findViewById(R.id.button);
		button.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				String path = pathText.getText().toString();
				try {
					byte[] data = ImageService.getImage(path);
					Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,
							data.length);
					imageView.setImageBitmap(bitmap);// 显示图片
				} catch (Throwable e) {
					Toast.makeText(ImageActivity.this, R.string.error, Toast.LENGTH_LONG)
							.show();
					Log.e(TAG, e.toString());
				}
			}
		});
	}
}
// <!-- 访问internet权限 -->
// <uses-permission android:name="android.permission.INTERNET"/>