work profile关闭时桌面图标变灰

应用变为不可用，图标变灰色，和刚毕业第一家公司当时还是Android4.4版本，Launcher做的图标变色功能有点像：用豌豆荚把安装的应用移动到sd卡，拔掉sd卡，图标变灰色，插入sd卡，应用重新变成彩色。
翻了一下之前的blog，才发现关于插拔sd卡的launcher没有写。好尴尬啊。。。

简单来写一下work profile的Launcher流程吧

操作步骤

1、work profile是Google mada测试的一项，安装Test DPC 之后，Launcher的all apps列表会有一个worp profile的栏目，里面有几个默认的apk带角标。
2、Google的launcher3默认实现了workprofile图标信息的展示
3、拖动图标到桌面，关闭work profile，图标变灰色。

图标更新逻辑

1、app/src/com/tblenovo/launcher/LauncherModel.java中收到work profile关闭的广播

public void onReceive(Context context, Intent intent) {if (DEBUG_RECEIVER) Log.d(TAG, "onReceive intent=" + intent);final String action = intent.getAction();if (Intent.ACTION_LOCALE_CHANGED.equals(action)) {// If we have changed locale we need to clear out the labels in all apps/workspace.forceReload();} else if (Intent.ACTION_MANAGED_PROFILE_ADDED.equals(action)|| Intent.ACTION_MANAGED_PROFILE_REMOVED.equals(action)) {UserManagerCompat.getInstance(context).enableAndResetCache();forceReload();} else if (Intent.ACTION_MANAGED_PROFILE_AVAILABLE.equals(action) ||Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE.equals(action) ||Intent.ACTION_MANAGED_PROFILE_UNLOCKED.equals(action)) {UserHandle user = intent.getParcelableExtra(Intent.EXTRA_USER);if (user != null) {if (Intent.ACTION_MANAGED_PROFILE_AVAILABLE.equals(action) ||Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE.equals(action)) {enqueueModelUpdateTask(new PackageUpdatedTask(PackageUpdatedTask.OP_USER_AVAILABILITY_CHANGE, user));}// ACTION_MANAGED_PROFILE_UNAVAILABLE sends the profile back to locked mode, so// we need to run the state change task again.if (Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE.equals(action) ||Intent.ACTION_MANAGED_PROFILE_UNLOCKED.equals(action)) {enqueueModelUpdateTask(new UserLockStateChangedTask(user));}}}else if (Intent.ACTION_WALLPAPER_CHANGED.equals(action)) {WallpaperBgCompat.getInstance(context.getApplicationContext()).getCompressWallpaper(true);} else if (BaseFlags.IS_DOGFOOD_BUILD && ACTION_FORCE_ROLOAD.equals(action)) {Launcher l = (Launcher) getCallback();l.reload();}}

2、app/src/com/android/launcher/model/PackageUpdatedTask.java中，OP_USER_AVAILABILITY_CHANGE操作，然后更新图标数据。
workprofile像是基于多用户去做的一个功能，默认主用户user 0，workprofile的user 我当时打断点的时候是user 10
3、省略中间的逻辑部分
4、bindUpdatedWorkspaceItems(updatedWorkspaceItems);更新图标
5、app/src/com/android/launcher/Workspace.java的updateShortcuts更新图标

void updateShortcuts(ArrayList<WorkspaceItemInfo> shortcuts) {...mapOverItems(MAP_RECURSE, new ItemOperator() {@Overridepublic boolean evaluate(ItemInfo info, View v) {if (info instanceof WorkspaceItemInfo && v instanceof BubbleTextView &&updates.contains(info)) {WorkspaceItemInfo si = (WorkspaceItemInfo) info;BubbleTextView shortcut = (BubbleTextView) v;Drawable oldIcon = shortcut.getIcon();boolean oldPromiseState = (oldIcon instanceof PreloadIconDrawable)&& ((PreloadIconDrawable) oldIcon).hasNotCompleted();shortcut.applyFromWorkspaceItem(si, si.isPromise() != oldPromiseState);}// process all the shortcutsreturn false;}});...}

6、app/src/com/android/launcher/BubbleTextView.java

public void applyFromWorkspaceItem(WorkspaceItemInfo info, boolean promiseStateChanged) {applyIconAndLabel(info);//这里更新图标和应用名称setTag(info);if (promiseStateChanged || (info.hasPromiseIconUi())) {applyPromiseState(promiseStateChanged);}applyDotState(info, false /* animate */);}
private void applyIconAndLabel(ItemInfoWithIcon info) {FastBitmapDrawable iconDrawable = DrawableFactory.INSTANCE.get(getContext()).newIcon(getContext(), info);//创建图标mDotParams.color = IconPalette.getMutedColor(info.iconColor, 0.54f);setIcon(iconDrawable);setText(info.title);if (info.contentDescription != null) {setContentDescription(info.isDisabled()? getContext().getString(R.string.disabled_app_label, info.contentDescription): info.contentDescription);}}

7、app/src/com/android/launcher/graphics/DrawableFactory.java

 /*** Returns a FastBitmapDrawable with the icon.*/public FastBitmapDrawable newIcon(Context context, ItemInfoWithIcon info) {FastBitmapDrawable drawable = info.usingLowResIcon()? new PlaceHolderIconDrawable(info, IconShape.getShapePath(), context): new FastBitmapDrawable(info);drawable.setIsDisabled(info.isDisabled());//这个disable就很灵性，点进去果然就是图标的处理部分代码太长就不贴了。return drawable;}

尾注

简单写一点图标颜色的部分逻辑分析，没有完整的打开，launcher更新、关闭、图标变化、主菜单更新等等。
有点费时间写。

授之以渔

灵感：我是怎么找到这个逻辑的
因为之前做过launcher，所以对桌面图标印象还是比较深的，直接找到BubbleTextView.java这个类
它其实是一个textview，设置了文字和图标在文字的那个方向

protected void applyCompoundDrawables(Drawable icon) {// If we had already set an icon before, disable relayout as the icon size is the// same as before.mDisableRelayout = mIcon != null;icon.setBounds(0, 0, mIconSize, mIconSize);if (mLayoutHorizontal) {setCompoundDrawablesRelative(icon, null, null, null);} else {setCompoundDrawables(null, icon, null, null);}mDisableRelayout = false;}

直接在这里打断点就可以了，所以桌面图标更新都会走到这里，被调用的有点多，慢慢过滤了一下就找到了上面的流程。。。。