/*
* Copyright (C) 2012 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 ee.ajapaik.android.external.bitmaputil;
import android.annotation.SuppressLint;
import android.app.ActivityManager;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.Build;
import android.os.Environment;
import android.os.StatFs;
import java.io.File;
/**
* Class containing some static utility methods.
*/
public class Utils {
public static final int IO_BUFFER_SIZE = 8 * 1024;
private Utils() {};
/**
* Workaround for bug pre-Froyo, see here for more info:
* http://android-developers.blogspot.com/2011/09/androids-http-clients.html
*/
public static void disableConnectionReuseIfNecessary() {
// HTTP connection reuse which was buggy pre-froyo
if (hasHttpConnectionBug()) {
System.setProperty("http.keepAlive", "false");
}
}
/**
* Get the size in bytes of a bitmap.
* @param bitmap
* @return size in bytes
*/
@SuppressLint("NewApi")
public static int getBitmapSize(Bitmap bitmap) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1) {
return bitmap.getByteCount();
}
// Pre HC-MR1
return bitmap.getRowBytes() * bitmap.getHeight();
}
/**
* Check if external storage is built-in or removable.
*
* @return True if external storage is removable (like an SD card), false
* otherwise.
*/
@SuppressLint("NewApi")
public static boolean isExternalStorageRemovable() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
return Environment.isExternalStorageRemovable();
}
return true;
}
/**
* Get the external app cache directory.
*
* @param context The context to use
* @return The external cache dir
*/
@SuppressLint("NewApi")
public static File getExternalCacheDir(Context context) {
if (hasExternalCacheDir()) {
return context.getExternalCacheDir();
}
// Before Froyo we need to construct the external cache dir ourselves
final String cacheDir = "/Android/data/" + context.getPackageName() + "/cache/";
return new File(Environment.getExternalStorageDirectory().getPath() + cacheDir);
}
/**
* Check how much usable space is available at a given path.
*
* @param path The path to check
* @return The space available in bytes
*/
@SuppressLint("NewApi")
public static long getUsableSpace(File path) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
return path.getUsableSpace();
}
final StatFs stats = new StatFs(path.getPath());
return (long) stats.getBlockSize() * (long) stats.getAvailableBlocks();
}
/**
* Get the memory class of this device (approx. per-app memory limit)
*
* @param context
* @return
*/
public static int getMemoryClass(Context context) {
return ((ActivityManager) context.getSystemService(
Context.ACTIVITY_SERVICE)).getMemoryClass();
}
/**
* Check if OS version has a http URLConnection bug. See here for more information:
* http://android-developers.blogspot.com/2011/09/androids-http-clients.html
*
* @return
*/
public static boolean hasHttpConnectionBug() {
return Build.VERSION.SDK_INT < Build.VERSION_CODES.FROYO;
}
/**
* Check if OS version has built-in external cache dir method.
*
* @return
*/
public static boolean hasExternalCacheDir() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO;
}
/**
* Check if ActionBar is available.
*
* @return
*/
public static boolean hasActionBar() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
}
}