标签:url
URL(Uniform Resource Locator)对象代表统一资源定位器,它是指向互联网"资源"的指针。资源可以是简单的文件或目录,也可以是对更复杂的对象的引用,例如对数据库或搜索引擎的查询。通常情况而言,URL可以由协议名、主机、端口和资源组成。即满足如下格式:
protocol://host:port/resourceName
例如如下的URL地址:
http://www.baidu.com/index.php
URL类提供了多个构造器用于创建URL对象,一旦获取了URL对象之后,可以调用如下常用方法来方法URL对应的资源。
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.url" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="19" /> <uses-permission android:name="android.permission.INTERNET"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.example.url.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>activity_main.xml
<LinearLayout 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" tools:context=".MainActivity" > <ImageView android:id="@+id/imageView" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>MainActivity.java
package com.example.url; import java.io.IOException; import java.io.InputStream; import java.net.MalformedURLException; import java.net.URL; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.widget.ImageView; import android.annotation.SuppressLint; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; public class MainActivity extends Activity { private ImageView show; private Bitmap bitmap; @SuppressLint("HandlerLeak") private Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { if (msg.what == 0x123){ //使用ImageView显示图片 show.setImageBitmap(bitmap); } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); show = (ImageView)this.findViewById(R.id.imageView); new Thread(){ @Override public void run() { // TODO Auto-generated method stub super.run(); try { //定义一个URL对象 URL url = new URL("http://news.c-ps.net/uploads/141024/18-141024152F62P.jpg"); Log.e("URL资源名", url.getFile()); Log.e("URL主机名", url.getHost()); Log.e("URL路径部分", url.getPath()); Log.e("URL端口号", ""+url.getPort()); //打开该URL对应的资源的输入流 InputStream inputStream = url.openStream(); //从InputStream中解析出图片 bitmap = BitmapFactory.decodeStream(inputStream); //发消息通知UI组件显示此bitmap对应的图片 handler.sendEmptyMessage(0x123); inputStream.close(); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }.start(); } }
URL url = new URL("http://news.c-ps.net/uploads/141024/18-141024152F62P.jpg");其中http://news.c-ps.net/uploads/141024/18-141024152F62P.jpg是图片地址,而不是显示此图片的网络地址。【右击网络图片】->【复制图片地址】->【得到网络图片的地址】
标签:url
原文地址:http://blog.csdn.net/thanksgining/article/details/43672233