如何从我们的Android应用程序删除其他应用程序缓存？

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.