转载请注明出处：http://blog.csdn.net/droyon/article/details/39891527
一、一级界面显示的条目数据大小，指的是哪里？
是否存在模拟存储区 = 存储空间是否含有模拟存储区。
假如（含有模拟存储区）{
大小 = Size_Total；
}否则{
大小 = Size_Internal；
}
假设应用程序存在于SD卡中，则：大小 = Size_External；
二、名词解释。以及所代表的存储空间。
public class PackageStats{
/** Size of the code (e.g., APK) */
public long codeSize;//apk的大小
/**
* Size of the internal data size for the application. (e.g.,
* /data/data/<app>)
*/
public long dataSize;//内部数据。/data/data/<packageName>
/** Size of cache used by the application. (e.g., /data/data/<app>/cache) */
public long cacheSize;//内部数据。/data/data/<packageName>/cache
/**
* Size of the secure container on external storage holding the
* application‘s code.
*/
public long externalCodeSize;//外部代码大小。比例如以下载的插件、资源等。
以及移动到sd中的应用
/**
* Size of the external data used by the application (e.g.,
* <sdcard>/Android/data/<app>)
*/
public long externalDataSize;//外部数据大小。<sdcard>/Android/data/<packageName>
/**
* Size of the external cache used by the application (i.e., on the SD
* card). If this is a subdirectory of the data directory, this size will be
* subtracted out of the external data size.
*/
public long externalCacheSize;//外部缓冲数据大小。假设此文件夹是externalDataSize的子文件夹，则此大小包括在externalDataSize中。
/** Size of the external media size used by the application. */
public long externalMediaSize;//外部媒体大小。
/** Size of the package‘s OBBs placed on external media. */
public long externalObbSize;//外部Obb大小。
三、 大小的计算方式。
内部数据大小 = codeSize + dataSize。
外部数据大小 = externalCodeSize + externalDataSize +externalCachaSize + externalMediaSize + externalObbSize。
应用大小（默认计算方式） = externalCodeSize + externalDataSize + codeSize + dataSize。
四、正在执行的服务排序方式。
參考资料：http://blog.csdn.net/jk2255cl/article/details/11682429
4、1：正在 执行的服务排序。
class ServiceProcessComparator implements Comparator<ProcessItem> {
public int compare(ProcessItem object1, ProcessItem object2) {
if (object1.mUserId != object2.mUserId) {//用户ID
if (object1.mUserId == mMyUserId) return -1;
if (object2.mUserId == mMyUserId) return 1;
return object1.mUserId < object2.mUserId ?
-1 : 1;
}
if (object1.mIsStarted != object2.mIsStarted) {//线程是否启动
// Non-started processes go last.
return object1.mIsStarted ? -1 : 1;
}
if (object1.mIsSystem != object2.mIsSystem) {//是否为系统进程
// System processes go below non-system.
return object1.mIsSystem ? 1 : -1;
}
if (object1.mActiveSince != object2.mActiveSince) {//服务activie的时间
// Remaining ones are sorted with the longest running
// services last.
return (object1.mActiveSince > object2.mActiveSince) ? -1 : 1;
}
return 0;
}
}
4.2：显示后台线程后排序
final Comparator<RunningState.MergedItem> mBackgroundComparator
= new Comparator<RunningState.MergedItem>() {
@Override
public int compare(MergedItem lhs, MergedItem rhs) {
if (lhs.mUserId != rhs.mUserId) {//用户ID
if (lhs.mUserId == mMyUserId) return -1;
if (rhs.mUserId == mMyUserId) return 1;
return lhs.mUserId < rhs.mUserId ? -1 : 1;
}
if (lhs.mProcess == rhs.mProcess) {//假设同一个进程的 进程和服务，依照label进行排序
if (lhs.mLabel == rhs.mLabel) {
return 0;
}
return lhs.mLabel != null ? lhs.mLabel.compareTo(rhs.mLabel) : -1;
}
if (lhs.mProcess == null) return -1;//进程是否为null
if (rhs.mProcess == null) return 1;
if (DEBUG_COMPARE) Log.i(TAG, " Label " + lhs.mProcess.mLabel
+ " with " + rhs.mProcess.mLabel);
final ActivityManager.RunningAppProcessInfo lhsInfo
= lhs.mProcess.mRunningProcessInfo;
final ActivityManager.RunningAppProcessInfo rhsInfo
= rhs.mProcess.mRunningProcessInfo;
final boolean lhsBg = lhsInfo.importance
>= ActivityManager.RunningAppProcessInfo.IMPORTANCE_BACKGROUND;
final boolean rhsBg = rhsInfo.importance
>= ActivityManager.RunningAppProcessInfo.IMPORTANCE_BACKGROUND;
if (DEBUG_COMPARE) Log.i(TAG, " Bg " + lhsBg + " with " + rhsBg);
if (lhsBg != rhsBg) {
return lhsBg ? 1 : -1;//是否为后台线程
}
final boolean lhsA = (lhsInfo.flags
& ActivityManager.RunningAppProcessInfo.FLAG_HAS_ACTIVITIES) != 0;
final boolean rhsA = (rhsInfo.flags
& ActivityManager.RunningAppProcessInfo.FLAG_HAS_ACTIVITIES) != 0;
if (DEBUG_COMPARE) Log.i(TAG, " Act " + lhsA + " with " + rhsA);
if (lhsA != rhsA) {//是否关联到系统进程
return lhsA ?
-1 : 1;
}
if (DEBUG_COMPARE) Log.i(TAG, " Lru " + lhsInfo.lru + " with " + rhsInfo.lru);
if (lhsInfo.lru != rhsInfo.lru) {//意味着是否最近频繁使用
return lhsInfo.lru < rhsInfo.lru ?
-1 : 1;
}
if (lhs.mProcess.mLabel == rhs.mProcess.mLabel) {
return 0;
}
if (lhs.mProcess.mLabel == null) return 1;//名称字母
if (rhs.mProcess.mLabel == null) return -1;
return lhs.mProcess.mLabel.compareTo(rhs.mProcess.mLabel);
}
};
五、所有应用程序排序方式
依照大小、名称排序。
mWhickSize取值參考一。等同于一中的大小。
依照名称进行排序：
public static final Comparator<AppEntry> ALPHA_COMPARATOR = new Comparator<AppEntry>() {
private final Collator sCollator = Collator.getInstance();
@Override
public int compare(AppEntry object1, AppEntry object2) {
final boolean normal1 = object1.info.enabled
&& (object1.info.flags&ApplicationInfo.FLAG_INSTALLED) != 0;
final boolean normal2 = object2.info.enabled
&& (object2.info.flags&ApplicationInfo.FLAG_INSTALLED) != 0;
if (normal1 != normal2) {
return normal1 ? -1 : 1;
}
return sCollator.compare(object1.label, object2.label);
}
};
依照大小排序，依照存在位置，排序方式不同。规则例如以下：
switch (mWhichSize) {
case SIZE_INTERNAL:
comparatorObj = ApplicationsState.INTERNAL_SIZE_COMPARATOR;
break;
case SIZE_EXTERNAL:
comparatorObj = ApplicationsState.EXTERNAL_SIZE_COMPARATOR;
break;
default:
comparatorObj = ApplicationsState.SIZE_COMPARATOR;
break;
}
默认排序方式
public static final Comparator<AppEntry> SIZE_COMPARATOR
= new Comparator<AppEntry>() {
private final Collator sCollator = Collator.getInstance();
@Override
public int compare(AppEntry object1, AppEntry object2) {
if (object1.size < object2.size) return 1;
if (object1.size > object2.size) return -1;
return sCollator.compare(object1.label, object2.label);
}
};
不含有模拟存储区
public static final Comparator<AppEntry> INTERNAL_SIZE_COMPARATOR
= new Comparator<AppEntry>() {
private final Collator sCollator = Collator.getInstance();
@Override
public int compare(AppEntry object1, AppEntry object2) {
if (object1.internalSize < object2.internalSize) return 1;
if (object1.internalSize > object2.internalSize) return -1;
return sCollator.compare(object1.label, object2.label);
}
};
sd卡存储区排序方式
public static final Comparator<AppEntry> EXTERNAL_SIZE_COMPARATOR
= new Comparator<AppEntry>() {
private final Collator sCollator = Collator.getInstance();
@Override
public int compare(AppEntry object1, AppEntry object2) {
if (object1.externalSize < object2.externalSize) return 1;
if (object1.externalSize > object2.externalSize) return -1;
return sCollator.compare(object1.label, object2.label);
}
};