本篇文章小编为大家介绍，Android 网络图片查看显示的实现方法，需要的朋友参考下。

我们的应用或多或少都会从网络获取图片数据然后进行显示，下面就将实现一个这样的例子，获取网络中的图片！

首先：我们来看一下效果图

界面中有三个控件，一个EditText，一个Button，一个ImageView

1、下面是具体布局文件

2、在MainActivity中进行图片图示代码编写

public class MainActivity extends Activity {
 private Button btn;
 private EditText path;
 private ImageView imgview;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  btn = (Button) findViewById(R.id.btn);
  path = (EditText) findViewById(R.id.picturepagh);
  imgview = (ImageView) findViewById(R.id.imageView);
  btn.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    Log.i("CLICK", ((Button) v).getText().toString());
    new Thread(runa).start();
   }
  });
 }
 public void setView() {
  String picturepath = path.getText().toString();
  byte[] data = null;
  try {
   data = ImageService.getImage(picturepath);
   Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);// BitmapFactory：图片工厂！
   Looper.prepare();// 必须调用此方法，要不然会报错
   Message msg = new Message();
   msg.what = 0;
   msg.obj = bitmap;
   handler.sendMessage(msg);
  } catch (Exception e) {
   Toast.makeText(getApplicationContext(), "获取图片错误", 1).show();
  }
 }
 private Handler handler = new Handler() {
  @Override
  public void handleMessage(Message msg) {
   if (msg.what == 0) {
    updateImageView((Bitmap) msg.obj);
   }
  }
 };
 private Runnable runa = new Runnable() {
  @Override
  public void run() {
   setView();
  }
 };
 private void updateImageView(Bitmap bm) {
  imgview.setImageBitmap(bm);
 }
}

3、添加一个ImageService图片服务类，里面包含一个获取网络数据的方法；

public class ImageService {
 // 获取网络图片的数据
 public static byte[] getImage(String picturepath) throws Exception {
  URL url = new URL(picturepath);
  HttpURLConnection conn = (HttpURLConnection) url.openConnection();// 基于http协议的连接对象
  conn.setConnectTimeout(10);// 10秒；
  conn.setRequestMethod("GET");// 大写
  if (conn.getResponseCode() == 200) {
   InputStream ins = conn.getInputStream();
   return StreamTool.read(ins);
  }
  return null;
 }
}

4、添加一个流处理工作类StreamTool

public class StreamTool {
 public static byte[] read(InputStream ins) throws Exception {
  ByteArrayOutputStream outstream = new ByteArrayOutputStream();
  byte[] buffer = new byte[1024];
  int length = 0;
  while ((length = ins.read(buffer)) > -1) {
   outstream.write(buffer, 0, length);
  }
  outstream.close();
  return outstream.toByteArray();
 }
}

5、大功告成？NO，还要添加网络访问权限：

OK，运行程序！