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/*
* Copyright (C) 2013 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.documentsui;
import android.app.ActivityManager;
import android.app.Application;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Point;
public class DocumentsApplication extends Application {
private RootsCache mRoots;
private Point mThumbnailsSize;
private ThumbnailCache mThumbnails;
public static RootsCache getRootsCache(Context context) {
return ((DocumentsApplication) context.getApplicationContext()).mRoots;
}
public static ThumbnailCache getThumbnailsCache(Context context, Point size) {
final DocumentsApplication app = (DocumentsApplication) context.getApplicationContext();
final ThumbnailCache thumbnails = app.mThumbnails;
if (!size.equals(app.mThumbnailsSize)) {
thumbnails.evictAll();
app.mThumbnailsSize = size;
}
return thumbnails;
}
@Override
public void onCreate() {
final ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
final int memoryClassBytes = am.getMemoryClass() * 1024 * 1024;
mRoots = new RootsCache(this);
mThumbnails = new ThumbnailCache(memoryClassBytes / 4);
final IntentFilter packageFilter = new IntentFilter();
packageFilter.addAction(Intent.ACTION_PACKAGE_ADDED);
packageFilter.addAction(Intent.ACTION_PACKAGE_CHANGED);
packageFilter.addAction(Intent.ACTION_PACKAGE_REMOVED);
packageFilter.addDataScheme("package");
registerReceiver(mPackageReceiver, packageFilter);
}
@Override
public void onTrimMemory(int level) {
super.onTrimMemory(level);
if (level >= TRIM_MEMORY_MODERATE) {
mThumbnails.evictAll();
} else if (level >= TRIM_MEMORY_BACKGROUND) {
mThumbnails.trimToSize(mThumbnails.size() / 2);
}
}
private BroadcastReceiver mPackageReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// TODO: narrow changed/removed to only packages that have backends
mRoots.update();
}
};
}
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