下载显示网路图片的例子
一个很简单的例子,直接上代码:1. ShowUrlImage.java文件
package cn.com;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;public class ShowUrlImage extends Activity{private Button Image_btn;private ImageView imageShow;String uriPic = "http://lh3.ggpht.com/_s354WAuIc9E/" + "R_DpW4Rzj-I/AAAAAAAAAsc/Ox73tdxGLSw/logo.jpg";/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.main); Image_btn = (Button) findViewById(R.id.Image); imageShow = (ImageView) findViewById(R.id.imageShow); Image_btn.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View arg0) { /* 设置Bitmap在ImageView中 */ imageShow.setImageBitmap(getURLBitmap()); } });}public Bitmap getURLBitmap(){ URL imageUrl = null; Bitmap bitmap = null; try { /* new URL对象将网址传入 */ imageUrl = new URL(uriPic); } catch (MalformedURLException e) { e.printStackTrace(); } try { /* 取得连接 */ HttpURLConnection conn = (HttpURLConnection) imageUrl .openConnection(); conn.connect(); /* 取得返回的InputStream */ InputStream is = conn.getInputStream(); // is.read(b) /* 将InputStream变成Bitmap */ bitmap = BitmapFactory.decodeStream(is); /* 关闭InputStream */ is.close(); } catch (IOException e) { e.printStackTrace(); } return bitmap;}}
2.main.xml文件
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent" android:layout_height="fill_parent"><ImageView android:id="@+id/imageShow"android:layout_below="@+id/myButton1" android:layout_width="wrap_content"android:layout_height="wrap_content" android:layout_gravity="center" /><Button android:id="@+id/Image" android:layout_width="wrap_content"android:layout_height="wrap_content" android:text="image"android:layout_alignParentBottom="true" /></RelativeLayout>
外加注意权限设定:
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
页:
[1]