Android 通过网络获取图片的代码，,Android 通过网络

Android 通过网络获取图片的代码，,Android 通过网络

Android 通过网络获取图片的代码 主activity```javapackage com.netimg;

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

public class AndroidnetimgActivity extends Activity { /* Called when the activity is first created. / //定义所使用的组件 private Button button; private EditText editText; private ImageView imagesView;

@Overridepublic void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    //实例化用到的组件    editText =(EditText)findViewById(R.id.EditText);    imagesView = (ImageView)findViewById(R.id.ImageView);    button = (Button)findViewById(R.id.Button);    //为按钮添加监听事件    button.setOnClickListener(new buttonListener());}private final class buttonListener implements OnClickListener{    @Override    public void onClick(View v) {        String path = editText.getText().toString();        System.out.println(path);        //通过业务类ImageService的getImage方法得到数据        try {            byte[] data = ImageService.getImage(path);            Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);            imagesView.setImageBitmap(bitmap);//显示图片        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();            Toast.makeText(getApplicationContext(), "获取失败", 1).show();        }    }}

}

业务类javapackage com.netimg;

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

public class ImageService {

public static byte[] getImage(String path) throws Exception {    URL url = new URL(path);    //基于HTTP协议连接对象    HttpURLConnection conn = (HttpURLConnection)url.openConnection();    conn.setConnectTimeout(5000);    conn.setRequestMethod("GET");    if(conn.getResponseCode() == 200){        InputStream inStream = conn.getInputStream();        return StreamTool.read(inStream);    }    return null;}

}

工具类javapackage com.netimg;

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

public class StreamTool {

public static byte[] read(InputStream inStream) throws IOException {    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();}

} 获取网络权限java<uses-permission android:name="android.permission.INTERNET"/>```