获取缓存大小接口
主要这里的方法已经和7.0不兼容了。
import android.app.usage.UsageStats;
import android.app.usage.UsageStatsManager;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Process;
import android.os.storage.StorageManager;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Map;
import android.app.usage.StorageStats;
import android.app.usage.StorageStatsManager;
public static long getCacheSizeByAndroidO(Context mContext, String mPackageName) {
StorageManager storageManager = (StorageManager) mContext.getSystemService(Context.STORAGE_SERVICE);
StorageStatsManager storageStatsManager = (StorageStatsManager) mContext.getSystemService(Context.STORAGE_STATS_SERVICE);
try {
StorageStats storageStats = storageStatsManager.queryStatsForPackage(StorageManager.UUID_DEFAULT, mPackageName, Process.myUserHandle());
return storageStats.getCacheBytes();
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return 0L;
}
清除缓存接口
这里的接口和7.0保持一致
PackageManager mPm = mContext.getPackageManager();
// need android.permission.DELETE_CACHE_FILES
mPm.deleteApplicationCacheFiles(cacheItem.packageName, new IPackageDataObserver.Stub() {
@Override
public void onRemoveCompleted(final String packageName, final boolean succeeded) throws RemoteException {
///
}
}
});
Andorid 8.0 Setting 模块的源码参考
源码的缓存大小
import com.android.internal.util.Preconditions;
import com.android.settings.utils.AsyncLoader;
import com.android.settingslib.applications.StorageStatsSource;
import com.android.settingslib.applications.StorageStatsSource.AppStorageStats;
import java.io.IOException;
/**
* Fetches the storage stats using the StorageStatsManager for a given package and user tuple.
*/
public class FetchPackageStorageAsyncLoader extends AsyncLoader<AppStorageStats {
private static final String TAG = "FetchPackageStorage";
private final StorageStatsSource mSource;
private final ApplicationInfo mInfo;
private final UserHandle mUser;
@Override
public AppStorageStats loadInBackground() {
AppStorageStats result = null;
try {
result = mSource.getStatsForPackage(mInfo.volumeUuid, mInfo.packageName, mUser);
} catch (NameNotFoundException | IOException e) {
Log.w(TAG, "Package may have been removed during query, failing gracefully", e);
}
return result;
}
========================================================================================
package com.android.settings.applications;
public class AppStorageSettings extends AppInfoWithHeader
@Override
public void onLoadFinished(Loader<AppStorageStats loader, AppStorageStats result) {
mSizeController.setResult(result);
updateUiWithSize(result);
}
private void updateUiWithSize(AppStorageStats result) {
} else {
long codeSize = result.getCodeBytes();
long cacheSize = result.getCacheBytes();
long dataSize = result.getDataBytes() - cacheSize;
源码的清理缓存接口
mPm.deleteApplicationCacheFiles
package com.android.settings.applications;
public class AppStorageSettings extends AppInfoWithHeader
implements OnClickListener, Callbacks, DialogInterface.OnClickListener,
LoaderManager.LoaderCallbacks<AppStorageStats {
private static final String TAG = AppStorageSettings.class.getSimpleName();
private ClearCacheObserver mClearCacheObserver;
@Override
public void onClick(View v) {
// 清理缓存按钮
if (v == mClearCacheButton) {
if (mAppsControlDisallowedAdmin != null && !mAppsControlDisallowedBySystem) {
RestrictedLockUtils.sendShowAdminSupportDetailsIntent(
getActivity(), mAppsControlDisallowedAdmin);
return;
} else if (mClearCacheObserver == null) { // Lazy initialization of observer
mClearCacheObserver = new ClearCacheObserver();
}
mMetricsFeatureProvider.action(getContext(),
MetricsEvent.ACTION_SETTINGS_CLEAR_APP_CACHE);
// 清理缓存
mPm.deleteApplicationCacheFiles(mPackageName, mClearCacheObserver);
class ClearCacheObserver extends IPackageDataObserver.Stub {
public void onRemoveCompleted(final String packageName, final boolean succeeded) {
final Message msg = mHandler.obtainMessage(MSG_CLEAR_CACHE);
msg.arg1 = succeeded ? OP_SUCCESSFUL : OP_FAILED;
mHandler.sendMessage(msg);
}
}
Android 7.0 的缓存大小接口
PackageManager mPm = mContext.getPackageManager();
mPm.getPackageSizeInfo(mPackageName, new IPackageStatsObserver.Stub() {
@Override
public void onGetStatsCompleted(PackageStats pStats, boolean succeeded) throws RemoteException {
cacheTotalSize = pStats.cacheSize + pStats.externalCacheSize;
}
}
以上这篇Android 8.0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。