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【Java】 Android 通过网络获取图片

作者:dezai / 发布于2014/4/4/ 392

Android 通过网络获取图片

主activity

package 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;

  @Override
  public 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();
      }

    }

  }
}

工具类

package 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


<uses-permission android:name="android.permission.INTERNET"/>

试试其它关键字

　获取图片　

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