如何清除缓存Android [英] How to clear cache Android

问题描述

我需要找到一种方法来清除我的应用程序存储在缓存中的数据.基本上我使用的是 Fedor 的 ( 在 ListView 中延迟加载图像 ) 延迟列表实现，例如我想自动清除缓存加载了 100 张图片.有什么想法可以做到吗?

I need to find a way how to clear the data which my application stores in cache.Basically I am using Fedor's ( Lazy load of images in ListView ) lazy list implementation and I want to clear the cache automatically when I have for example 100 images loaded.Any ideas how to do that?

代码:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    list=(ListView)findViewById(R.id.list);
    adapter=new LazyAdapter(this, mStrings);
    list.setAdapter(adapter);

    deleteCache(this);
    adapter.notifyDataSetChanged();


}

public static void deleteCache(Context context) {
    try {
        File dir = context.getCacheDir();
        if (dir != null && dir.isDirectory()) {
            deleteDir(dir);
        }
    } catch (Exception e) {}
}

public static boolean deleteDir(File dir) {
    if (dir != null && dir.isDirectory()) {
        String[] children = dir.list();
        for (int i = 0; i < children.length; i++) {
            boolean success = deleteDir(new File(dir, children[i]));
            if (!success) {
                return false;
            }
        }
    }
    return dir.delete();
}

推荐答案

这将删除缓存

public static void deleteCache(Context context) {
    try {
        File dir = context.getCacheDir();
        if (dir != null && dir.isDirectory()) {
            deleteDir(dir);
        }
    } catch (Exception e) {}
}

public static boolean deleteDir(File dir) {
    if (dir != null && dir.isDirectory()) {
        String[] children = dir.list();
        for (int i = 0; i < children.length; i++) {
            boolean success = deleteDir(new File(dir, children[i]));
            if (!success) {
                return false;
            }
        }
    }
    return dir.delete();
}

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