查询网络图片

来源：互联网发布：无锡软件测试培训编辑：程序博客网时间：2024/06/04 19:44

查询网络图片

1、布局

2、MainActivity

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

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、添加网络访问权限：

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

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