图片

activity_main.xml

   

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

      <ImageView
        android:id="@+id/ivImage"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_weight="1" />

    <EditText
        android:id="@+id/etImageUrl"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/ivImage"
        android:layout_centerVertical="true"
        android:ems="10"
        android:hint="http://pic2.ooopic.com/01/28/15/36b1OOOPIC23.jpg" />

    <Button
        android:id="@+id/btnView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/etImageUrl"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="35dp"
        android:onClick="viewImage"
        android:text="浏览" />

</RelativeLayout>

 

MainActivity:

     

package com.example.imagebrowser;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.text.TextUtils;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {
 //private static final InputStream InputStream = null;
 private EditText etUrl;
 private ImageView ivImage;
 public static final int SHOWIMAGE=1;
 private Handler handler =new Handler(){
  public void handlerMessage(Message msg){
   switch(msg.what){
     case SHOWIMAGE:
     Bitmap bitmap=(Bitmap)msg.obj;
     ivImage.setImageBitmap(bitmap);
     break;
    
     default:
      break;
   }
   
  };
 } ;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initViews();
    }
    private void initViews() {
  // TODO Auto-generated method stub
     etUrl=(EditText) findViewById(R.id.etImageUrl);
  ivImage=(ImageView) findViewById(R.id.ivImage);
 }

 @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
 public void ShowImage(View view){
  final String path=etUrl.getText().toString();
  if(TextUtils.isEmpty(path))
  {
   Toast.makeText(this, "图片路径不能为空", Toast.LENGTH_SHORT).show();
  }else{
   new Thread(){
    public void run(){
   //获取图片
   try{
    URL url=new URL(path);
    //发送请求
    HttpsURLConnection connection=(HttpsURLConnection)url.openConnection();
    connection.setRequestMethod("GET");
    //设置连接超时
    connection.setConnectTimeout(5000);
    int responsecode=connection.getResponseCode();
    if(responsecode==200){
     InputStream is=connection.getInputStream();
     Bitmap bitmap=BitmapFactory.decodeStream(is);
     //ivImage.setImageBitmap(bitmap);
     Message message=new Message();
     message.what=SHOWIMAGE;
     message.obj=bitmap;
     handler.sendMessage(message);
     
    }else{
     //Toast.makeText(NetImageBrowserActivity,this,"显示图片失败");
    }
   }catch(MalformedURLException e)
   {
    e.printStackTrace();
   }catch(IOException e)
   {
    e.printStackTrace();
   }
  };
 }.start();
 }
}
}