三、應用設置之界面標註

轉載請註明出處：http://blog.csdn.net/droyon/article/details/39891355

1、全部、正在執行、已停用、USB存儲設備、已下載TAB頁界面元素標註。

一、圖標。

boolean ensureIconLocked(Context context, PackageManager pm) {
            if (this.icon == null) {
                if (this.apkFile.exists()) {
                    this.icon = this.info.loadIcon(pm);
                    return true;
                } else {
                    this.mounted = false;
                    this.icon = context.getResources().getDrawable(
                            com.android.internal.R.drawable.sym_app_on_sd_unavailable_icon);
                }
            } else if (!this.mounted) {
                // If the app wasn't mounted but is now mounted, reload
                // its icon.
                if (this.apkFile.exists()) {
                    this.mounted = true;
                    this.icon = this.info.loadIcon(pm);
                    return true;
                }
            }
            return false;
        }
    }

二、應用名稱。

void ensureLabel(Context context) {
            if (this.label == null || !this.mounted) {
                if (!this.apkFile.exists()) {
                    this.mounted = false;
                    this.label = info.packageName;
                } else {
                    this.mounted = true;
                    CharSequence label = info.loadLabel(context.getPackageManager());
                    this.label = label != null ? label.toString() : info.packageName;
                }
            }
        }

三、大小。

ApplicationsState.AppFilter filterObj;
            Comparator<AppEntry> comparatorObj;
            private int mWhichSize = SIZE_TOTAL;
            boolean emulated = Environment.isExternalStorageEmulated();
            if (emulated) {
                mWhichSize = SIZE_TOTAL;
            } else {
                mWhichSize = SIZE_INTERNAL;
            }
            switch (mFilterMode) {
                case FILTER_APPS_THIRD_PARTY:
                    filterObj = ApplicationsState.THIRD_PARTY_FILTER;
                    break;
                case FILTER_APPS_SDCARD:
                    filterObj = ApplicationsState.ON_SD_CARD_FILTER;
                    if (!emulated) {
                        mWhichSize = SIZE_EXTERNAL;
                    }
                    break;
                case FILTER_APPS_DISABLED:
                    filterObj = ApplicationsState.DISABLED_FILTER;
                    break;
                default:
                    filterObj = ApplicationsState.ALL_ENABLED_FILTER;
                    break;
            }

void updateSizeText(CharSequence invalidSizeStr, int whichSize) {
        if (ManageApplications.DEBUG) Log.i(ManageApplications.TAG, "updateSizeText of " + entry.label + " " + entry
                + ": " + entry.sizeStr);
        if (entry.sizeStr != null) {
            switch (whichSize) {
                case ManageApplications.SIZE_INTERNAL:
                    appSize.setText(entry.internalSizeStr);
                    break;
                case ManageApplications.SIZE_EXTERNAL:
                    appSize.setText(entry.externalSizeStr);
                    break;
                default:
                    appSize.setText(entry.sizeStr);
                    break;
            }
        } else if (entry.size == ApplicationsState.SIZE_INVALID) {
            appSize.setText(invalidSizeStr);
        }
    }

不一樣的TAB頁，依照是否含有模擬存儲區，大小的計算方式不一樣。

大小的具體計算方式，請參考應用設置之屬性、名詞等解析。

四、五、空間。

此處的空間爲應用所佔的空間，屬於機身存儲設備區。計算方式：

try {
                        final long[] stats = mContainerService.getFileSystemStats(
                                Environment.getExternalStorageDirectory().getPath());
                        mTotalStorage = stats[0];
                        mFreeStorage = stats[1];
                    } catch (RemoteException e) {
                        Log.w(TAG, "Problem in container service", e);
                    }

2、正在執行界面元素標註。

一、圖標。

public Drawable loadIcon(Context context, RunningState state) {
            if (mPackageInfo != null) {
                return mPackageInfo.loadIcon(state.mPm);
            }
            return null;
        }

二、名稱。

void ensureLabel(PackageManager pm) {
            if (mLabel != null) {
                return;
            }
            
            try {
                ApplicationInfo ai = pm.getApplicationInfo(mProcessName,
                        PackageManager.GET_UNINSTALLED_PACKAGES);
                if (ai.uid == mUid) {
                    mDisplayLabel = ai.loadLabel(pm);
                    mLabel = mDisplayLabel.toString();
                    mPackageInfo = ai;
                    return;
                }
            } catch (PackageManager.NameNotFoundException e) {
            }
            
            // If we couldn't get information about the overall
            // process, try to find something about the uid.
            String[] pkgs = pm.getPackagesForUid(mUid);
            
            // If there is one package with this uid, that is what we want.
            if (pkgs.length == 1) {
                try {
                    ApplicationInfo ai = pm.getApplicationInfo(pkgs[0],
                            PackageManager.GET_UNINSTALLED_PACKAGES);
                    mDisplayLabel = ai.loadLabel(pm);
                    mLabel = mDisplayLabel.toString();
                    mPackageInfo = ai;
                    return;
                } catch (PackageManager.NameNotFoundException e) {
                }
            }
            
            // If there are multiple, see if one gives us the official name
            // for this uid.
            for (String name : pkgs) {
                try {
                    PackageInfo pi = pm.getPackageInfo(name, 0);
                    if (pi.sharedUserLabel != 0) {
                        CharSequence nm = pm.getText(name,
                                pi.sharedUserLabel, pi.applicationInfo);
                        if (nm != null) {
                            mDisplayLabel = nm;
                            mLabel = nm.toString();
                            mPackageInfo = pi.applicationInfo;
                            return;
                        }
                    }
                } catch (PackageManager.NameNotFoundException e) {
                }
            }
            
            // If still don't have anything to display, just use the
            // service info.
            if (mServices.size() > 0) {
                ApplicationInfo ai = mServices.values().iterator().next()
                        .mServiceInfo.applicationInfo;
                mPackageInfo = ai;
                mDisplayLabel = mPackageInfo.loadLabel(pm);
                mLabel = mDisplayLabel.toString();
                return;
            }
            
            // Finally... whatever, just pick the first package's name.
            try {
                ApplicationInfo ai = pm.getApplicationInfo(pkgs[0],
                        PackageManager.GET_UNINSTALLED_PACKAGES);
                mDisplayLabel = ai.loadLabel(pm);
                mLabel = mDisplayLabel.toString();
                mPackageInfo = ai;
                return;
            } catch (PackageManager.NameNotFoundException e) {
            }
        }

三、含有的服務以及進城詳情。

mergedItem = new MergedItem(pi.mUserId);
                    for (ServiceItem si : pi.mServices.values()) {//構建內部mServices，mProcesInfo。
                        mergedItem.mServices.add(si);
                        si.mMergedItem = mergedItem;
                    }
                    mergedItem.mProcess = pi;
                    mergedItem.mOtherProcesses.clear();
                    for (int mpi=firstProc; mpi<(mProcessItems.size()-1); mpi++) {
                        mergedItem.mOtherProcesses.add(mProcessItems.get(mpi));
                    }

setDescription(context, (mProcess.mPid > 0 ? 1 : 0) + mOtherProcesses.size(),
                            mServices.size());

四、大小。

ong[] pss = ActivityManagerNative.getDefault()
                    .getProcessPss(pids);
boolean updateSize(Context context, long pss, int curSeq) {
            mSize = pss * 1024;
            if (mCurSeq == curSeq) {
                String sizeStr = Formatter.formatShortFileSize(
                        context, mSize);
                if (!sizeStr.equals(mSizeStr)){
                    mSizeStr = sizeStr;
                    // We update this on the second tick where we update just
                    // the text in the current items, so no need to say we
                    // changed here.
                    return false;
                }
            }
            return false;
        }

五、執行時間。

long activeSince = service.restarting == 0 ? service.activeSince : -1;
服務activie的時間
ai.mFirstRunTime = activeSince/*item.mActiveSince*/;
DateUtils.formatElapsedTime(builder,
                            (SystemClock.elapsedRealtime()-mFirstRunTime)/1000)

六、七、正在執行的空間計算。內存空間。

ActivityManager.MemoryInfo memInfo = new ActivityManager.MemoryInfo();
mAm.getMemoryInfo(memInfo);
SECONDARY_SERVER_MEM = memInfo.secondaryServerThreshold;

MemInfoReader mMemInfoReader = new MemInfoReader();
mMemInfoReader.readMemInfo();
        long availMem = mMemInfoReader.getFreeSize() + mMemInfoReader.getCachedSize()
                - SECONDARY_SERVER_MEM;
float totalMem = mMemInfoReader.getTotalSize();
            float totalShownMem = availMem + mLastBackgroundProcessMemory
                    + mLastServiceProcessMemory;