| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.storagemanager.deletionhelper; |
| |
| import android.content.Context; |
| import androidx.preference.Preference; |
| import androidx.preference.Preference.OnPreferenceChangeListener; |
| import androidx.preference.CheckBoxPreference; |
| import androidx.preference.PreferenceViewHolder; |
| import android.util.AttributeSet; |
| |
| import android.view.View; |
| import android.widget.ProgressBar; |
| import android.widget.TextView; |
| import com.android.storagemanager.R; |
| |
| /** |
| * Preference to handle the deletion of various data types in the Deletion Helper. |
| */ |
| public abstract class DeletionPreference extends CheckBoxPreference implements |
| DeletionType.FreeableChangedListener, OnPreferenceChangeListener { |
| private DeletionType.FreeableChangedListener mListener; |
| private long mFreeableBytes; |
| private int mFreeableItems; |
| private DeletionType mDeletionService; |
| private TextView mSummary; |
| private View mWidget; |
| private ProgressBar mProgressBar; |
| private boolean mLoaded; |
| |
| public DeletionPreference(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| setLayoutResource(R.layout.deletion_preference); |
| setOnPreferenceChangeListener(this); |
| setPersistent(false); |
| } |
| |
| /** |
| * Returns the number of bytes which can be cleared by the deletion service. |
| * |
| * @return The number of bytes. |
| */ |
| public long getFreeableBytes(boolean countUnchecked) { |
| return (isChecked() || countUnchecked) ? mFreeableBytes : 0; |
| } |
| |
| /** |
| * Register a listener to be called back on when the freeable bytes have changed. |
| * @param listener The callback listener. |
| */ |
| public void registerFreeableChangedListener(DeletionType.FreeableChangedListener listener) { |
| mListener = listener; |
| } |
| |
| /** |
| * Registers a deletion service to update the preference's information. |
| * @param deletionService A photo/video deletion service. |
| */ |
| public void registerDeletionService(DeletionType deletionService) { |
| mDeletionService = deletionService; |
| if (mDeletionService != null) { |
| mDeletionService.registerFreeableChangedListener(this); |
| } |
| } |
| |
| /** |
| * Returns the deletion service powering the preference. |
| * @return The deletion service. |
| */ |
| public DeletionType getDeletionService() { |
| return mDeletionService; |
| } |
| |
| @Override |
| public void onFreeableChanged(int numItems, long freeableBytes) { |
| mFreeableItems = numItems; |
| mFreeableBytes = freeableBytes; |
| mLoaded = true; |
| if (mDeletionService != null) { |
| setEnabled(!mDeletionService.isEmpty()); |
| } |
| if (!isEnabled()) { |
| setChecked(false); |
| } |
| if (mWidget != null) { |
| mWidget.setVisibility(View.VISIBLE); |
| } |
| if (mProgressBar != null) { |
| mProgressBar.setVisibility(View.GONE); |
| } |
| maybeUpdateListener(); |
| } |
| |
| @Override |
| public void onBindViewHolder(PreferenceViewHolder holder) { |
| super.onBindViewHolder(holder); |
| mSummary = (TextView) holder.findViewById(android.R.id.summary); |
| mProgressBar = (ProgressBar) holder.findViewById(R.id.progress_bar); |
| mProgressBar.setVisibility(mLoaded ? View.GONE : View.VISIBLE); |
| mWidget = holder.findViewById(android.R.id.widget_frame); |
| mWidget.setVisibility(mLoaded ? View.VISIBLE : View.GONE); |
| } |
| |
| @Override |
| public boolean onPreferenceChange(Preference preference, Object newValue) { |
| setChecked((boolean) newValue); |
| mSummary.setActivated((boolean) newValue); |
| maybeUpdateListener(); |
| return true; |
| } |
| |
| private void maybeUpdateListener() { |
| if (mListener != null) { |
| mListener.onFreeableChanged( |
| mFreeableItems, getFreeableBytes(DeletionHelperSettings.COUNT_CHECKED_ONLY)); |
| } |
| } |
| } |