Android 8.0的缓存大小和缓存清理接口方法

2023-09-09 13:04:04 302

获取缓存大小接口

主要这里的方法已经和7.0不兼容了。

importandroid.app.usage.UsageStats;
importandroid.app.usage.UsageStatsManager;
importandroid.content.Context;
importandroid.content.pm.PackageManager;
importandroid.os.Process;
importandroid.os.storage.StorageManager;

importjava.io.IOException;
importjava.util.ArrayList;
importjava.util.Map;

importandroid.app.usage.StorageStats;
importandroid.app.usage.StorageStatsManager;

publicstaticlonggetCacheSizeByAndroidO(ContextmContext,StringmPackageName){
StorageManagerstorageManager=(StorageManager)mContext.getSystemService(Context.STORAGE_SERVICE);
StorageStatsManagerstorageStatsManager=(StorageStatsManager)mContext.getSystemService(Context.STORAGE_STATS_SERVICE);

try{
StorageStatsstorageStats=storageStatsManager.queryStatsForPackage(StorageManager.UUID_DEFAULT,mPackageName,Process.myUserHandle());
returnstorageStats.getCacheBytes();
}catch(PackageManager.NameNotFoundExceptione){
e.printStackTrace();
}catch(IOExceptione){
e.printStackTrace();
}
return0L;
}

清除缓存接口

这里的接口和7.0保持一致

PackageManagermPm=mContext.getPackageManager();
//needandroid.permission.DELETE_CACHE_FILES
mPm.deleteApplicationCacheFiles(cacheItem.packageName,newIPackageDataObserver.Stub(){

@Override
publicvoidonRemoveCompleted(finalStringpackageName,finalbooleansucceeded)throwsRemoteException{
///
}
}
});

Andorid8.0Setting模块的源码参考

源码的缓存大小

importcom.android.internal.util.Preconditions;
importcom.android.settings.utils.AsyncLoader;
importcom.android.settingslib.applications.StorageStatsSource;
importcom.android.settingslib.applications.StorageStatsSource.AppStorageStats;

importjava.io.IOException;

/**
*FetchesthestoragestatsusingtheStorageStatsManagerforagivenpackageandusertuple.
*/
publicclassFetchPackageStorageAsyncLoaderextendsAsyncLoader{
privatestaticfinalStringTAG="FetchPackageStorage";
privatefinalStorageStatsSourcemSource;
privatefinalApplicationInfomInfo;
privatefinalUserHandlemUser;

@Override
publicAppStorageStatsloadInBackground(){
AppStorageStatsresult=null;
try{
result=mSource.getStatsForPackage(mInfo.volumeUuid,mInfo.packageName,mUser);
}catch(NameNotFoundException|IOExceptione){
Log.w(TAG,"Packagemayhavebeenremovedduringquery,failinggracefully",e);
}
returnresult;
}

========================================================================================
packagecom.android.settings.applications;

publicclassAppStorageSettingsextendsAppInfoWithHeader

@Override
publicvoidonLoadFinished(Loaderloader,AppStorageStatsresult){
mSizeController.setResult(result);
updateUiWithSize(result);
}

privatevoidupdateUiWithSize(AppStorageStatsresult){
}else{
longcodeSize=result.getCodeBytes();
longcacheSize=result.getCacheBytes();
longdataSize=result.getDataBytes()-cacheSize;

源码的清理缓存接口

mPm.deleteApplicationCacheFiles

packagecom.android.settings.applications;

publicclassAppStorageSettingsextendsAppInfoWithHeader
implementsOnClickListener,Callbacks,DialogInterface.OnClickListener,
LoaderManager.LoaderCallbacks{
privatestaticfinalStringTAG=AppStorageSettings.class.getSimpleName();

privateClearCacheObservermClearCacheObserver;

@Override
publicvoidonClick(Viewv){
//清理缓存按钮
if(v==mClearCacheButton){
if(mAppsControlDisallowedAdmin!=null&&!mAppsControlDisallowedBySystem){
RestrictedLockUtils.sendShowAdminSupportDetailsIntent(
getActivity(),mAppsControlDisallowedAdmin);
return;
}elseif(mClearCacheObserver==null){//Lazyinitializationofobserver
mClearCacheObserver=newClearCacheObserver();
}
mMetricsFeatureProvider.action(getContext(),
MetricsEvent.ACTION_SETTINGS_CLEAR_APP_CACHE);
//清理缓存
mPm.deleteApplicationCacheFiles(mPackageName,mClearCacheObserver);

classClearCacheObserverextendsIPackageDataObserver.Stub{
publicvoidonRemoveCompleted(finalStringpackageName,finalbooleansucceeded){
finalMessagemsg=mHandler.obtainMessage(MSG_CLEAR_CACHE);
msg.arg1=succeeded?OP_SUCCESSFUL:OP_FAILED;
mHandler.sendMessage(msg);
}
}

Android7.0的缓存大小接口

PackageManagermPm=mContext.getPackageManager();
mPm.getPackageSizeInfo(mPackageName,newIPackageStatsObserver.Stub(){

@Override
publicvoidonGetStatsCompleted(PackageStatspStats,booleansucceeded)throwsRemoteException{

cacheTotalSize=pStats.cacheSize+pStats.externalCacheSize;
}
}

以上这篇Android8.0的缓存大小和缓存清理接口方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持毛票票。

Android 8.0的缓存大小和缓存清理接口方法

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