异步加载网络图片之Universal-Image-Loader的使用

最新推荐文章于 2024-10-15 13:21:04 发布

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最新推荐文章于 2024-10-15 13:21:04 发布

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本文链接：https://blog.youkuaiyun.com/qq_26323183/article/details/45643791

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使用步骤：

1.新建一个Android项目，下载JAR包添加到工程libs目录下

2.新建一个UILApplication（名字可以随便取）继承Application，并在onCreate()中创建ImageLoader的配置参数，代码如下：

public class UILApplication extends Application {
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
@SuppressWarnings("unused")
@Override
public 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.Builder config = new ImageLoaderConfiguration.Builder(context);
config.threadPriority(Thread.NORM_PRIORITY - 2);
config.denyCacheImageMultipleSizesInMemory();
config.diskCacheFileNameGenerator(new Md5FileNameGenerator());
config.diskCacheSize(50 * 1024 * 1024); // 50 MiB
config.tasksProcessingOrder(QueueProcessingType.LIFO);
config.writeDebugLogs(); // Remove for release app

// Initialize ImageLoader with configuration.
ImageLoader.getInstance().init(config.build());
}
}

3.文中使用的是universal-image-loader-1.9.3-with-sources，还需在新建一个类Constants（2跟3的代码都是直接复制官方的Demo），代码如下：

public final class Constants {

private Constants() {
}

public static class Config {
public static final boolean DEVELOPER_MODE = false;
}

public static class Extra {
public static final String FRAGMENT_INDEX = "com.nostra13.example.universalimageloader.FRAGMENT_INDEX";
public static final String IMAGE_POSITION = "com.nostra13.example.universalimageloader.IMAGE_POSITION";
}
}