android 获取网络图片

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<pre name="code" class="java">import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.ImageView;import android.widget.Toast;//<manifest> //<!-- 访问internet权限 -->//<uses-permission android:name="android.permission.INTERNET"/>//</manifest> public class MainActivity extends Activity {    private EditText pathText;    private ImageView imageView;        @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                pathText = (EditText) this.findViewById(R.id.imagepath);        imageView = (ImageView) this.findViewById(R.id.imageView);        Button button = (Button) this.findViewById(R.id.button);        button.setOnClickListener(new ButtonClickListener());    }        private final class ButtonClickListener implements View.OnClickListener{public void onClick(View v) {

String path = pathText.getText().toString();

try{

byte[] data = getImage(path);

Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);

imageView.setImageBitmap(bitmap);//显示图片

}catch (Exception e) {

e.printStackTrace();

Toast.makeText(getApplicationContext(), R.string.error, 1).show();

}}    }/*** 获取网络图片的数据* @param path 网络图片路径* @return*/public byte[] getImage(String path) throws Exception{

URL url = new URL(path);

HttpURLConnection conn = (HttpURLConnection) url.openConnection();//基于HTTP协议连接对象

conn.setConnectTimeout(5000);

conn.setRequestMethod("GET");

if(conn.getResponseCode() == 200){

InputStream inStream = conn.getInputStream();

return StreamTool.read(inStream);

return null;

}/*** 读取流中的数据* @param inStream* @return* @throws Exception*/public  byte[] read(InputStream inStream) throws Exception{

ByteArrayOutputStream outStream = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int len = 0;

while( (len = inStream.read(buffer)) != -1){

outStream.write(buffer, 0, len);

inStream.close();

return outStream.toByteArray();

}}

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