使用Android-Universal-Image-Loader加载图片

gihub地址：https://github.com/nostra13/Android-Universal-Image-Loader

clone地址：https://github.com/nostra13/Android-Universal-Image-Loader.git

在使用这个开源框架时，容易出错的地方是ImageLoader的实例化，因为在源码的例子中，关于ImageLoader的实例化是放在应用程序的Application配置中，在应用加载之前实现的。

当然这样的方法我们可以借鉴：

第一种实例化的办法：

<span style="font-size:18px;">/******************************************************************************* * Copyright 2011-2013 Sergey Tarasevich * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/package com.nostra13.universalimageloader.sample;import android.annotation.TargetApi;import android.app.Application;import android.content.Context;import android.os.Build;import android.os.StrictMode;import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;import com.nostra13.universalimageloader.core.ImageLoader;import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;import com.nostra13.universalimageloader.core.assist.QueueProcessingType;/** * @author Sergey Tarasevich (nostra13[at]gmail[dot]com) */public class UILApplication extends Application {@TargetApi(Build.VERSION_CODES.GINGERBREAD)@SuppressWarnings("unused")@Overridepublic void onCreate() {if (Constants.Config.DEVELOPER_MODE && Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectAll().penaltyDialog().build());StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectAll().penaltyDeath().build());}super.onCreate();initImageLoader(getApplicationContext());}public static void initImageLoader(Context context) {// This configuration tuning is custom. You can tune every option, you may tune some of them,// or you can create default configuration by//  ImageLoaderConfiguration.createDefault(this);// method.ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context).threadPriority(Thread.NORM_PRIORITY - 2).denyCacheImageMultipleSizesInMemory().diskCacheFileNameGenerator(new Md5FileNameGenerator()).diskCacheSize(50 * 1024 * 1024) // 50 Mb.tasksProcessingOrder(QueueProcessingType.LIFO).writeDebugLogs() // Remove for release app.build();// Initialize ImageLoader with configuration.ImageLoader.getInstance().init(config);}}</span>

然后在AndroidManifest.xml中注册，红色标出的地方：

<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.nostra13.universalimageloader.sample"    android:versionCode="39"    android:versionName="1.9.4" >    <uses-sdk        android:minSdkVersion="5"        android:targetSdkVersion="20" />    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <application        <span style="color:#FF0000;">android:name=".UILApplication"</span>        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"android:allowBackup="false">        <activity            android:name=".activity.HomeActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity            android:name=".activity.SimpleImageActivity"            android:label="@string/ac_name_image_list" /><activityandroid:name=".activity.ComplexImageActivity"android:label="@string/ac_name_complex" />        <!-- Widget -->        <receiver android:name=".widget.UILWidgetProvider" >            <meta-data                android:name="android.appwidget.provider"                android:resource="@xml/widget_provider" />            <intent-filter>                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />            </intent-filter>        </receiver>    </application></manifest></span>

第二种实例化的办法：

在构造函数中进行实例化：

<span style="font-size:18px;">ImageLoaderConfiguration config = newImageLoaderConfiguration.Builder(context).build();ImageLoader.getInstance().init(config);mImageLoader = ImageLoader.getInstance();</span>

注意mImageLoader提前声明。

接下来使用它来加载图片就在github的例子中给出了。

///////////////////////////////////////////////////////////////////////////////学习的教程

http://www.cnblogs.com/kissazi2/p/3886563.html