我正在尝试开发一个可以删除其他应用程序缓存数据的
Android应用程序,我试图浏览所有博客,但它们都没有为我工作,我可以通过以下代码清除我的应用程序的缓存
File cache = getCacheDir();
File appDir = new File(cache.getParent());
if (appDir.exists())
{
String[] children = appDir.list();
for (String s : children)
{
if (!s.equals("lib"))
{
deleteDir(new File(appDir,s));
Toast.makeText(DroidCleaner.this,"Cache Cleaned",Toast.LENGTH_LONG).show();
Log.i("TAG","**************** File /data/data/APP_PACKAGE/" + s + " DELETED *******************");
}
}
}
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();
}
我的清单代码
<uses-permission android:name="android.permission.CLEAR_APP_CACHE"/>
我在2.2,2.3和4.0上测试了代码
并在看到以下链接Android: Clear Cache of All Apps?中的帖子后
我将代码更改为
PackageManager pm = getPackageManager();
// Get all methods on the PackageManager
Method[] methods = pm.getClass().getDeclaredMethods();
for (Method m : methods) {
if (m.getName().equals("freeStorage")) {
// Found the method I want to use
try {
long desiredFreeStorage = 8 * 1024 * 1024 * 1024; // Request for 8GB of free space
m.invoke(pm,desiredFreeStorage,null);
} catch (Exception e) {
// Method invocation Failed. Could be a permission problem
}
break;
}
}
我想清除其他应用程序的缓存,任何人都可以帮助我,如果我错了请纠正我,提前谢谢.
解决方法
API 23中不再支持此API,即Marshmallow.在Marshmallow中不允许使用权限.
但是通过询问附件的运行时许可还有另一种方法.从Play商店试试应用All-in-one Toolbox.此应用程序即使在Marshmallow中也能清除其他应用程序缓存.那么我们应该可以这样做.
我正在研究这个问题.一旦找到解决方案,我将更新答案.谢谢.
OLD ANSWER IS AS FOLLOWS
我使用了以下代码,现在我可以清除所有应用程序的缓存而无需生根,它对我来说非常合适,
private static final long CACHE_APP = Long.MAX_VALUE;
private CachePackageDataObserver mClearCacheObserver;
btnCache.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
clearCache();
}
});//End of btnCache Anonymous class
void clearCache()
{
if (mClearCacheObserver == null)
{
mClearCacheObserver=new CachePackageDataObserver();
}
PackageManager mPM=getPackageManager();
@SuppressWarnings("rawtypes")
final Class[] classes= { Long.TYPE,IPackageDataObserver.class };
Long localLong=Long.valueOf(CACHE_APP);
try
{
Method localMethod=
mPM.getClass().getMethod("freeStorageAndNotify",classes);
/*
* Start of inner try-catch block
*/
try
{
localMethod.invoke(mPM,localLong,mClearCacheObserver);
}
catch (IllegalArgumentException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IllegalAccessException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (InvocationTargetException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
/*
* End of inner try-catch block
*/
}
catch (NoSuchMethodException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
}//End of clearCache() method
private class CachePackageDataObserver extends IPackageDataObserver.Stub
{
public void onRemoveCompleted(String packageName,boolean succeeded)
{
}//End of onRemoveCompleted() method
}//End of CachePackageDataObserver instance inner class
并在你的src文件夹中创建一个名为android.content.pm的包,在该包中创建名为IPackageDataObserver.aidl的文件并将以下代码粘贴到其中
package android.content.pm;
/**
* API for package data change related callbacks from the Package Manager.
* Some usage scenarios include deletion of cache directory,generate
* statistics related to code,data,cache usage(TODO)
* {@hide}
*/
oneway interface IPackageDataObserver {
void onRemoveCompleted(in String packageName,boolean succeeded);
}
并在您的清单中确保您使用以下代码
<uses-permission android:name="android.permission.CLEAR_APP_CACHE"/>
如果你们发现任何问题请随时与我联系,谢谢.
