如何清除缓存的Andr​​oid [英] How to clear cache Android

问题描述

我需要找到一种方法如何清除这cache.Basically我的应用程序商店，我使用费多尔的（<一个数据href="http://stackoverflow.com/questions/541966/android-how-do-i-do-a-lazy-load-of-images-in-listview/3068012#3068012">Android - 如何做我做的ListView 图片）懒列表实现的延迟加载，我想自动清除缓存时，我有例如100张图像loaded.Any想法如何做到这一点

编辑： code：

 公共无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.main）;

    名单=（ListView控件）findViewById（R.id.list）;
    适配器=新LazyAdapter（这一点，mStrings）;
    list.setAdapter（适配器）;

    deleteCache（本）;
    adapter.notifyDataSetChanged（）;


}

公共静态无效deleteCache（上下文的背景下）{
    尝试 {
        文件DIR = context.getCacheDir（）;
        如果（DIR = NULL和放大器;！＆安培; dir.isDirectory（））{
            deleteDir（DIR）;
        }
    }赶上（例外五）{}
}

公共静态布尔deleteDir（文件目录）{
    如果（DIR = NULL和放大器;！＆安培; dir.isDirectory（））{
        的String []孩子= dir.list（）;
        的for（int i = 0; I＆LT; children.length;我++）{
            布尔成功= deleteDir（新建文件（目录，孩子们[I]））;
            如果（！成功）{
                返回false;
            }
        }
    }
    返回dir.delete（）;
}
 

解决方案

这将删除缓存

 公共静态无效deleteCache（上下文的背景下）{
    尝试 {
        文件DIR = context.getCacheDir（）;
        如果（DIR = NULL和放大器;！＆安培; dir.isDirectory（））{
            deleteDir（DIR）;
        }
    }赶上（例外五）{}
}

公共静态布尔deleteDir（文件目录）{
    如果（DIR = NULL和放大器;！＆安培; dir.isDirectory（））{
        的String []孩子= dir.list（）;
        的for（int i = 0; I＆LT; children.length;我++）{
            布尔成功= deleteDir（新建文件（目录，孩子们[I]））;
            如果（！成功）{
                返回false;
            }
        }
    }
    返回dir.delete（）;
}
 

I need to find a way how to clear the data which my application stores in cache.Basically I am using Fedor's ( Android - How do I do a 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?

EDIT: Code :

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();
}

解决方案

this will delete cache

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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