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Android使用线程获取网络图片的方法

2019年07月24日  | 移动技术网移动技术  | 我要评论

本文为大家分享了android使用线程获取网络图片的具体代码，供大家参考，具体内容如下

androidmanifest.xml    

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.zdcrobot.handlermessage">
  <uses-permission android:name="android.permission.internet"></uses-permission>
  <application
    android:allowbackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsrtl="true"
    android:theme="@style/apptheme">
    <activity
      android:name=".mainactivity"
      android:label="@string/app_name"
      android:theme="@style/apptheme.noactionbar">
      <intent-filter>
        <action android:name="android.intent.action.main" />
 
        <category android:name="android.intent.category.launcher" />
      </intent-filter>
    </activity>
  </application>
 
</manifest>

activity_main.xml   

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.coordinatorlayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:fitssystemwindows="true"
  tools:context="com.zdcrobot.handlermessage.mainactivity">
 
  <linearlayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <button
      android:id="@+id/button1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="加载图片"/>
    <imageview
      android:id="@+id/image1"
      android:layout_width="match_parent"
      android:layout_height="500dp" />
  </linearlayout>
 
</android.support.design.widget.coordinatorlayout>

mainactivity.class    

package com.zdcrobot.handlermessage;
 
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.button;
import android.widget.imageview;
 
import java.io.ioexception;
import java.io.inputstream;
import java.net.httpurlconnection;
import java.net.malformedurlexception;
import java.net.url;
 
public class mainactivity extends appcompatactivity {
  private button button;
  private imageview imageview;
  private string imagpath = "http://pica.nipic.com/2007-11-09/200711912453162_2.jpg";
  private final int is_finish = 1;
  private handler handler = new handler(){
    @override
    public void handlemessage(message msg) {
      bitmap bitmap = (bitmap)msg.obj;
      imageview.setimagebitmap(bitmap);
    }
  };
  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main);
    button = (button)findviewbyid(r.id.button1);
    imageview = (imageview)findviewbyid(r.id.image1);
    button.setonclicklistener(new view.onclicklistener() {
      @override
      public void onclick(view v) {
        new thread(new myclass()).start();
      }
    });
  }
 
  public class myclass implements runnable{
 
    @override
    public void run() {
      bitmap bitmap = null;
      try {
        url url = new url(imagpath);
        httpurlconnection httpurlconnection = (httpurlconnection)url.openconnection();
        httpurlconnection.setdoinput(true);
        httpurlconnection.connect();
        inputstream inputstream = httpurlconnection.getinputstream();
        bitmap = bitmapfactory.decodestream(inputstream);
      } catch (malformedurlexception e) {
        e.printstacktrace();
      } catch (ioexception e) {
        e.printstacktrace();
      }
      message message = message.obtain();
      message.obj = bitmap;
      message.what = is_finish;
      handler.sendmessage(message);
    }
  }
}

以上就是本文的全部内容，希望对大家学习android软件编程有所帮助。

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