android查看网络图片的实现方法

本文实例为大家分享了android查看网络图片的具体代码，供大家参考，具体内容如下

需求描述： 输入一个 图片地址，下载到本地 展示。

效果展示

代码清单

MainActivity.java

package com.example.www.checkimage;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {

 private EditText mPt_url;
 private ImageView mIv_show;
 private Handler mHandler = new Handler(){
 @Override
 public void handleMessage(Message msg) {
 if(msg.what == 1){
 Bitmap bitmap = (Bitmap) msg.obj;
 mIv_show.setImageBitmap(bitmap);
 Toast.makeText(getApplicationContext(), "图片展示成功", Toast.LENGTH_LONG).show();
 }
 }
 };

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 mPt_url = (EditText) findViewById(R.id.pt_url);
 mIv_show = (ImageView) findViewById(R.id.imageCon);
 }

 public void checkImage(View v) {
 new Thread(){
 @Override
 public void run() {

 try {
  String path = mPt_url.getText().toString().trim();
  URL url = new URL(path);
  HttpURLConnection conn = (HttpURLConnection) url.openConnection();
  conn.setRequestMethod("GET");
  conn.setConnectTimeout(5000);
  int responseCode = conn.getResponseCode();
  if(responseCode == 200) {
  InputStream is = conn.getInputStream();


  Bitmap bitmap = BitmapFactory.decodeStream(is);

  Message msg = Message.obtain(); // 创建 消息
  msg.obj = bitmap;
  msg.what = 1;


  mHandler.sendMessage(msg);
  }
 } catch (Exception e) {
  e.printStackTrace();
 }

 }
 }.start();
 }
}

activiity_main.xml

AndroidManifest.xml

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。