安卓图片显示

package com.example.imgwatcher;

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

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.StrictMode;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectDiskReads().detectDiskWrites().detectNetwork().penaltyLog().build());
    StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectLeakedSqlLiteObjects().detectLeakedClosableObjects().penaltyLog().penaltyDeath().build());
    
    
}
public void click(View v){
    
    System.out.println("---");
    //请求网址获取图片
    //确定网址
    String path = "http://192.168.68.232:8080/question/p1.jpg";
    //获取URL对象
    
    try {
        URL url = new URL(path);
        //获取连接对象
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();
        //初始化连接对象
        conn.setRequestMethod("GET");
        conn.setReadTimeout(5000);
        conn.setConnectTimeout(5000);
        if(conn.getResponseCode() == 200){
            InputStream is = conn.getInputStream();
            Bitmap bmp = BitmapFactory.decodeStream(is);
            ImageView iv = (ImageView) findViewById(R.id.iv);
            iv.setImageBitmap(bmp);
        }else{
            Toast.makeText(this, "请求异常", 0).show();
        }
    } catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
    }
}

}