如何在Android当中显示网络图片
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在android当中显示一张网络图片的时候，其实是比较麻烦的。首先得把这个网络图片转换成java的imputstream流，然后再把这个留转换成一个bitMap.
bitMap是可以作为参数传给imageView的。
在下边的returnBitMap函数是最核心的，也是大家可以重用的，它负责把一个url的网络图片变成一个本地的BitMap。
<div class="blockcode">
[*] package com.jinyan.image;
[*]
[*] 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.util.Log;
[*] import android.view.View;
[*] import android.view.View.OnClickListener;
[*] import android.widget.Button;
[*] import android.widget.ImageView;
[*]
[*] public class ActivityMain extends Activity {
[*] /** Called when the activity is first created. */
[*]
[*] String imageUrl = "http://i.pbase.com/o6/92/229792/1/80199697.uAs58yHk.50pxCross_of_the_Knights_Templar_svg.png";
[*] Bitmap bmImg;
[*] ImageView imView;
[*]
[*] Button button1;
[*]
[*] @Override
[*] public void onCreate(Bundle savedInstanceState) {
[*] super.onCreate(savedInstanceState);
[*] setContentView(R.layout.main);
[*] imView = (ImageView) findViewById(R.id.imview);
[*]imView.setImageBitmap(returnBitMap(imageUrl));
[*]
[*]
[*]}
[*]
[*]public Bitmap returnBitMap(String url) {
[*]URL myFileUrl = null;
[*]Bitmap bitmap = null;
[*]try {
[*]myFileUrl = new URL(url);
[*]} catch (MalformedURLException e) {
[*]e.printStackTrace();
[*]}
[*]try {
[*]HttpURLConnection conn = (HttpURLConnection) myFileUrl
[*] .openConnection();
[*]conn.setDoInput(true);
[*]conn.connect();
[*]InputStream is = conn.getInputStream();
[*]bitmap = BitmapFactory.decodeStream(is);
[*]is.close();
[*]} catch (IOException e) {
[*] e.printStackTrace();
[*] }
[*] return bitmap;
[*]}
[*]
[*]}
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