Launcher3 安装App加载显示过程分析，androidstudio开发app实例

“Initializing LauncherAppState in the absence of LauncherProvider”);

}

Log.v(Launcher.TAG, “LauncherAppState initiated”);

Preconditions.assertUIThread();

mContext = context;

mInvariantDeviceProfile = new InvariantDeviceProfile(mContext);

mIconCache = new IconCache(mContext, mInvariantDeviceProfile);

mWidgetCache = new WidgetPreviewLoader(mContext, mIconCache);

mModel = new LauncherModel(this, mIconCache, AppFilter.newInstance(mContext));

//初始化接口

LauncherAppsCompat.getInstance(mContext).addOnAppsChangedCallback(mModel);

/**

Call from Application.onTerminate(), which is not guaranteed to ever be called.

public void onTerminate() {

mContext.unregisterReceiver(mModel);

final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(mContext);

launcherApps.removeOnAppsChangedCallback(mModel);

PackageInstallerCompat.getInstance(mContext).onStop();

if (mNotificationBadgingObserver != null) {

mNotificationBadgingObserver.unregister();

}

LauncherModel onPackageAdded 中调用的 enqueueModelUpdateTask 实现

public void enqueueModelUpdateTask(ModelUpdateTask task) {

task.init(mApp, this, sBgDataModel, mBgAllAppsList, mUiExecutor);

runOnWorkerThread(task);

}

/** Runs the specified runnable immediately if called from the worker thread, otherwise it is

posted on the worker thread handler. */

private static void runOnWorkerThread(Runnable r) {

if (sWorkerThread.getThreadId() == Process.myTid()) {

r.run();

} else {

// If we are not on the worker thread, then post to the worker handler

sWorker.post®;

}

上面主要实现是 ModelUpdateTask 在工作线程进行任务处理

/**

A runnable which changes/updates the data model of the launcher based on certain events.

public interface ModelUpdateTask extends Runnable {

/**

Called before the task is posted to initialize the internal state.

void init(LauncherAppState app, LauncherModel model,

BgDataModel dataModel, AllAppsList allAppsList, Executor uiExecutor);

}

public abstract class BaseModelUpdateTask implements ModelUpdateTask {

PackageUpdatedTask 处理由于程序包管理器中的更改（应用程序安装、更新、删除）或用户可用性更改而引起的更新。

/**

Handles updates due to changes in package manager (app installed/updated/removed)
or when a user availability changes.

public class PackageUpdatedTask extends BaseModelUpdateTask {

private static final boolean DEBUG = true;

private static final String TAG = “PackageUpdatedTask”;

public static final int OP_NONE = 0;

public static final int OP_ADD = 1;

public static final int OP_UPDATE = 2;

public static final int OP_REMOVE = 3; // uninstalled

public static final int OP_UNAVAILABLE = 4; // external media unmounted

public static final int OP_SUSPEND = 5; // package suspended

public static final int OP_UNSUSPEND = 6; // package unsuspended

public static final int OP_USER_AVAILABILITY_CHANGE = 7; // user available/unavailable

@Override

public void execute(LauncherAppState app, BgDataModel dataModel, AllAppsList appsList) {

final Context context = app.getContext();

final IconCache iconCache = app.getIconCache();

final String[] packages = mPackages;

final int N = packages.length;

FlagOp flagOp = FlagOp.NO_OP;

final HashSet packageSet = new HashSet<>(Arrays.asList(packages));

ItemInfoMatcher matcher = ItemInfoMatcher.ofPackages(packageSet, mUser);

switch (mOp) {

case OP_ADD: {

for (int i = 0; i < N; i++) {

if (DEBUG) Log.d(TAG, "mAllAppsList.addPackage " + packages[i]);

iconCache.updateIconsForPkg(packages[i], mUser);

if (FeatureFlags.LAUNCHER3_PROMISE_APPS_IN_ALL_APPS) {

appsList.removePackage(packages[i], Process.myUserHandle());

}

appsList.addPackage(context, packages[i], mUser);

// Automatically add homescreen icon for work profile apps for below O device.

if (!Utilities.ATLEAST_OREO && !Process.myUserHandle().equals(mUser)) {//del by mjf for receive package changed msg

SessionCommitReceiver.queueAppIconAddition(context, packages[i], mUser);

}

flagOp = FlagOp.removeFlag(ShortcutInfo.FLAG_DISABLED_NOT_AVAILABLE);

break;

}

…

final ArrayList addedOrModified = new ArrayList<>();

addedOrModified.addAll(appsList.added);

//add for load new install app on workspace start by lhw

if(FeatureFlags.DISABLE_ALL_APP){

ArrayList<Pair<ItemInfo, Object>> installQueue = new ArrayList<>();

final List profiles = UserManagerCompat.getInstance(context).getUserProfiles();

ArrayList<InstallShortcutReceiver.PendingInstallShortcutInfo> added = new ArrayList<InstallShortcutReceiver.PendingInstallShortcutInfo>();

for (UserHandle user : profiles) {

final List apps = LauncherAppsCompat.getInstance(context).getActivityList(null, user);

synchronized (this) {

for (LauncherActivityInfo info : apps) {

if(DmConfig.isHiddenPackage(info.getComponentName())){continue;}//hide app by lhw

for (AppInfo appInfo : appsList.added) {

if(info.getComponentName().equals(appInfo.componentName)){

InstallShortcutReceiver.PendingInstallShortcutInfo mPendingInstallShortcutInfo

= new InstallShortcutReceiver.PendingInstallShortcutInfo(info,context);

added.add(mPendingInstallShortcutInfo);

installQueue.add(mPendingInstallShortcutInfo.getItemInfo());

}

if (!added.isEmpty()) {

app.getModel().addAndBindAddedWorkspaceItems(installQueue);

}

//add for load new install app on workspace end by lhw

appsList.added.clear();

addedOrModified.addAll(appsList.modified);

appsList.modified.clear();

final ArrayList removedApps = new ArrayList<>(appsList.removed);

appsList.removed.clear();

final ArrayMap<ComponentName, AppInfo> addedOrUpdatedApps = new ArrayMap<>();

if (!addedOrModified.isEmpty()) {

scheduleCallbackTask(new CallbackTask() {

@Override

public void execute(Callbacks callbacks) {

//TODO bindAppsAddedOrUpdated 通过AllAppsStore的addOrUpdateApps方法去通知AllApps界面刷新 LHW

callbacks.bindAppsAddedOrUpdated(addedOrModified);

}

});

for (AppInfo ai : addedOrModified) {

addedOrUpdatedApps.put(ai.componentName, ai);

}

通过execute 执行应用的添加删除更新操作

iconCache.updateIconsForPkg 更新应用图标信息

/**

Updates the entries related to the given package in memory and persistent DB.

public synchronized void updateIconsForPkg(String packageName, UserHandle user) {

removeIconsForPkg(packageName, user);

try {

PackageInfo info = mPackageManager.getPackageInfo(packageName,

PackageManager.GET_UNINSTALLED_PACKAGES);

long userSerial = mUserManager.getSerialNumberForUser(user);

for (LauncherActivityInfo app : mLauncherApps.getActivityList(packageName, user)) {

addIconToDBAndMemCache(app, info, userSerial, false /replace existing/);

}

} catch (NameNotFoundException e) {

Log.d(TAG, “Package not found”, e);

}

通过appsList.addPackage方法将新应用信息缓存到AllAppsList

/**

Add the icons for the supplied apk called packageName.

public void addPackage(Context context, String packageName, UserHandle user) {

final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(context);

final List matches = launcherApps.getActivityList(packageName,

user);

for (LauncherActivityInfo info : matches) {

add(new AppInfo(context, info, user), info);

}

/**

Add the supplied ApplicationInfo objects to the list, and enqueue it into the
list to broadcast when notify() is called.
If the app is already in the list, doesn’t add it.

public void add(AppInfo info, LauncherActivityInfo activityInfo) {

if (!mAppFilter.shouldShowApp(info.componentName)) {

return;

}

if (findAppInfo(info.componentName, info.user) != null) {

return;

}

mIconCache.getTitleAndIcon(info, activityInfo, true /* useLowResIcon */);

data.add(info);

added.add(info);

}

通过bindAppsAddedOrUpdated方法回调launcher，进行界面更新的处理。

final ArrayMap<ComponentName, AppInfo> addedOrUpdatedApps = new ArrayMap<>();

if (!addedOrModified.isEmpty()) {

scheduleCallbackTask(new CallbackTask() {

@Override

public void execute(Callbacks callbacks) {//TODO bindAppsAddedOrUpdated 通过AllAppsStore的addOrUpdateApps方法去通知AllApps界面刷新 LHW

callbacks.bindAppsAddedOrUpdated(addedOrModified);

}

});

for (AppInfo ai : addedOrModified) {

addedOrUpdatedApps.put(ai.componentName, ai);

}

4.Launcher.java 中通过AllAppsStore的addOrUpdateApps方法去通知AllApps界面刷新

/**

Default launcher application.

public class Launcher extends BaseDraggingActivity implements LauncherExterns,

LauncherModel.Callbacks, LauncherProviderChangeListener, UserEventDelegate{

public static final String TAG = “Launcher”;

/**

A package was updated.
Implementation of the meth
od from LauncherModel.Callbacks.

@Override

public void bindAppsAddedOrUpdated(ArrayList apps) {

mAppsView.getAppsStore().addOrUpdateApps(apps);

}

5.在AllAppsStore中更新App 列表

/**

A utility class to maintain the collection of all apps.

public class AllAppsStore {

/**

Adds or updates existing apps in the list

public void addOrUpdateApps(List apps) {

for (AppInfo app : apps) {

Log.d(“LHW_L”,“addOrUpdateApps-==”+app.title+",=apps.size="+apps.size());

mComponentToAppMap.put(app.toComponentKey(), app);

}

notifyUpdate();

}

AllAppsContainerView 获取 AllAppsStore 所有应用数据,通过all_apps_rv_layout.xml中AllAppsRecyclerView显示

/**

The all apps view container.

public class AllAppsContainerView extends SpringRelativeLayout implements DragSource,

Insettable, OnDeviceProfileChangeListener {

private final AllAppsStore mAllAppsStore = new AllAppsStore();

public AllAppsContainerView(Context context, AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

mLauncher = Launcher.getLauncher(context);

mLauncher.addOnDeviceProfileChangeListener(this);

mSearchQueryBuilder = new SpannableStringBuilder();

Selection.setSelection(mSearchQueryBuilder, 0);

mAH = new AdapterHolder[2];

mAH[AdapterHolder.MAIN] = new AdapterHolder(false /* isWork */);

mAH[AdapterHolder.WORK] = new AdapterHolder(true /* isWork */);

mNavBarScrimPaint = new Paint();

mNavBarScrimPaint.setColor(Themes.getAttrColor(context, R.attr.allAppsNavBarScrimColor));

mAllAppsStore.addUpdateListener(this::onAppsUpdated);

addSpringView(R.id.all_apps_header);

addSpringView(R.id.apps_list_view);

addSpringView(R.id.all_apps_tabs_view_pager);

}

AllAppsContainerView中 AdapterHolder 的 AllAppsGridAdapter加载显示所有App信息到视图

/**

A RecyclerView with custom fast scroll support for the all apps view.

public class AllAppsRecyclerView extends BaseRecyclerView implements LogContainerProvider {

public class AdapterHolder {

public static final int MAIN = 0;

public static final int WORK = 1;

public final AllAppsGridAdapter adapter;

final LinearLayoutManager layoutManager;

final AlphabeticalAppsList appsList;

final Rect padding = new Rect();

AllAppsRecyclerView recyclerView;

boolean verticalFadingEdge;

AdapterHolder(boolean isWork) {

appsList = new AlphabeticalAppsList(mLauncher, mAllAppsStore, isWork);

adapter = new AllAppsGridAdapter(mLauncher, appsList);

appsList.setAdapter(adapter);

layoutManager = adapter.getLayoutManager();

}

void setup(@NonNull View rv, @Nullable ItemInfoMatcher matcher) {

appsList.updateItemFilter(matcher);

recyclerView = (AllAppsRecyclerView) rv;

recyclerView.setEdgeEffectFactory(createEdgeEffectFactory());

recyclerView.setApps(appsList, mUsingTabs);

recyclerView.setLayoutManager(layoutManager);

recyclerView.setAdapter(adapter);

recyclerView.setHasFixedSize(true);

// No animations will occur when changes occur to the items in this RecyclerView.

recyclerView.setItemAnimator(null);

FocusedItemDecorator focusedItemDecorator = new FocusedItemDecorator(recyclerView);

recyclerView.addItemDecoration(focusedItemDecorator);

adapter.setIconFocusListener(focusedItemDecorator.getFocusListener());

applyVerticalFadingEdgeEnabled(verticalFadingEdge);

applyPadding();

}

AllAppsGridAdapter 获取数据显示App 图标和信息

@Override

public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

switch (viewType) {

case VIEW_TYPE_ICON:

BubbleTextView icon = (BubbleTextView) mLayoutInflater.inflate(

R.layout.all_apps_icon, parent, false);

icon.setOnClickListener(ItemClickHandler.INSTANCE);

icon.setOnLongClickListener(ItemLongClickListener.INSTANCE_ALL_APPS);

icon.setLongPressTimeout(ViewConfiguration.getLongPressTimeout());

icon.setOnFocusChangeListener(mIconFocusListener);

// Ensure the all apps icon height matches the workspace icons in portrait mode.

icon.getLayoutParams().height = mLauncher.getDeviceProfile().allAppsCellHeightPx;

return new ViewHolder(icon);

all_apps_icon.xml 中 BubbleTextView 显示桌面图标信息

<com.android.launcher3.BubbleTextView

xmlns:android=“http://schemas.android.com/apk/res/android”

xmlns:launcher=“http://schemas.android.com/apk/res-auto”

style="@style/BaseIcon"

android:id="@+id/icon"

android:layout_width=“match_parent”

android:layout_height=“wrap_content”

android:stateListAnimator="@animator/all_apps_fastscroll_icon_anim"

launcher:iconDisplay=“all_apps”

launcher:centerVertically=“true”

android:paddingLeft="@dimen/dynamic_grid_cell_padding_x"

android:paddingRight="@dimen/dynamic_grid_cell_padding_x" />

onBindViewHolder applyFromApplicationInfo 填充App信息数据

@Override

public void onBindViewHolder(ViewHolder holder, int position) {

switch (holder.getItemViewType()) {

case VIEW_TYPE_ICON:

AppInfo info = mApps.getAdapterItems().get(position).appInfo;

BubbleTextView icon = (BubbleTextView) holder.itemView;

icon.reset();

icon.applyFromApplicationInfo(info);

break;

Launcher 自定义 BubbleTextView 显示应用图标和信息

/**

TextView that draws a bubble behind the text. We cannot use a LineBackgroundSpan
because we want to make the bubble taller than the text and TextView’s clip is
too aggressive.

public class BubbleTextView extends TextView implements ItemInfoUpdateReceiver, OnResumeCallback {

public void applyFromApplicationInfo(AppInfo info) {

applyIconAndLabel(info);

// We don’t need to check the info since it’s not a ShortcutInfo

super.setTag(info);

// Verify high res immediately

verifyHighRes();

if (info instanceof PromiseAppInfo) {

PromiseAppInfo promiseAppInfo = (PromiseAppInfo) info;

applyProgressLevel(promiseAppInfo.level);

}

applyBadgeState(info, false /* animate */);

}

private void applyIconAndLabel(ItemInfoWithIcon info) {

FastBitmapDrawable iconDrawable = DrawableFactory.get(getContext()).newIcon(info);

mBadgeColor = 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);

}

/**

Sets the icon for this view based on the layout direction.

private void setIcon(Drawable icon) {

if (mIsIconVisible) {

applyCompoundDrawables(icon);

}

mIcon = icon;

}

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;

}

Launcher 初始加载所有应用信息

Launcher.java文件在onCreate 通过 LauncherModel 的 startLoader 函数进行数据的绑定加载和更新

/**

Default launcher application.

public class Launcher extends BaseDraggingActivity implements LauncherExterns,

LauncherModel.Callbacks, LauncherProviderChangeListener, UserEventDelegate{

public static final String TAG = “Launcher”;

static final boolean LOGD = false;

@Override

protected void onCreate(Bundle savedInstanceState) {

TraceHelper.beginSection(“Launcher-onCreate”);

super.onCreate(savedInstanceState);

TraceHelper.partitionSection(“Launcher-onCreate”, “super call”);

LauncherAppState app = LauncherAppState.getInstance(this);

mOldConfig = new Configuration(getResources().getConfiguration());

//获取初始化 LauncherModel 进行广播监听数据绑定和更新加载

mModel = app.setLauncher(this);

initDeviceProfile(app.getInvariantDeviceProfile());

// We only load the page synchronously if the user rotates (or triggers a

// configuration change) while launcher is in the foreground

int currentScreen = PagedView.INVALID_RESTORE_PAGE;

if (savedInstanceState != null) {

currentScreen = savedInstanceState.getInt(RUNTIME_STATE_CURRENT_SCREEN, currentScreen);

}

// LauncherModel startLoader 开启线程进行数据加载

if (!mModel.startLoader(currentScreen)) {

if (!internalStateHandled) {

// If we are not binding synchronously, show a fade in animation when

// the first page bind completes.

mDragLayer.getAlphaProperty(ALPHA_INDEX_LAUNCHER_LOAD).setValue(0);

}

} else {

// Pages bound synchronously.

mWorkspace.setCurrentPage(currentScreen);

setWorkspaceLoading(true);

}

// For handling default keys

setDefaultKeyMode(DEFAULT_KEYS_SEARCH_LOCAL);

setContentView(mLauncherView);

LauncherModel 广播监听Launcher数据处理和接口回调

startLoader() 绑定和加载所用应用信息、小组件、快捷方式等到Workspace

/**

Maintains in-memory state of the Launcher. It is expected that there should be only one
LauncherModel object held in a static. Also provide APIs for updating the database state
for the Launcher.

public class LauncherModel extends BroadcastReceiver

implements LauncherAppsCompat.OnAppsChangedCallbackCompat {

private static final boolean DEBUG_RECEIVER = !com.android.launcher3.Log.IS_USER_VERSON;//true;

/**

Starts the loader. Tries to bind {@params synchronousBindPage} synchronously if possible.
@return true if the page could be bound synchronously.

public boolean startLoader(int synchronousBindPage) {

// Enable queue before starting loader. It will get disabled in Launcher#finishBindingItems

InstallShortcutReceiver.enableInstallQueue(InstallShortcutReceiver.FLAG_LOADER_RUNNING);

synchronized (mLock) {

// Don’t bother to start the thread if we know it’s not going to do anything

if (mCallbacks != null && mCallbacks.get() != null) {

final Callbacks oldCallbacks = mCallbacks.get();

// Clear any pending bind-runnables from the synchronized load process.

// begin modify by mjf for REQ006

//mUiExecutor.execute(oldCallbacks::clearPendingBinds);

final Runnable runnable = new Runnable() {

@Override

public void run() {

oldCallbacks.clearPendingBinds();

}

};

mUiExecutor.execute(runnable);

// end

// If there is already one running, tell it to stop.

stopLoader();

LoaderResults loaderResults = new LoaderResults(mApp, sBgDataModel,

mBgAllAppsList, synchronousBindPage, mCallbacks);

if (mModelLoaded && !mIsLoaderTaskRunning) {

// Divide the set of loaded items into those that we are binding synchronously,

// and everything else that is to be bound normally (asynchronously).

loaderResults.bindWorkspace();

// For now, continue posting the binding of AllApps as there are other

// issues that arise from that.

loaderResults.bindAllApps();

loaderResults.bindDeepShortcuts();

loaderResults.bindWidgets();

return true;

} else {

startLoaderForResults(loaderResults);

}

return false;

}

startLoaderForResults() 开始加载和返回数据结果

public void startLoaderForResults(LoaderResults results) {

synchronized (mLock) {

stopLoader();

mLoaderTask = new LoaderTask(mApp, mBgAllAppsList, sBgDataModel, results);

runOnWorkerThread(mLoaderTask);

//mUiExecutor.execute(oldCallbacks::clearPendingBinds);

final Runnable runnable = new Runnable() {

@Override

public void run() {

oldCallbacks.clearPendingBinds();

}

};

mUiExecutor.execute(runnable);

// end

// If there is already one running, tell it to stop.

stopLoader();

LoaderResults loaderResults = new LoaderResults(mApp, sBgDataModel,

mBgAllAppsList, synchronousBindPage, mCallbacks);

if (mModelLoaded && !mIsLoaderTaskRunning) {

// Divide the set of loaded items into those that we are binding synchronously,

// and everything else that is to be bound normally (asynchronously).

loaderResults.bindWorkspace();

// For now, continue posting the binding of AllApps as there are other

// issues that arise from that.

loaderResults.bindAllApps();

loaderResults.bindDeepShortcuts();

loaderResults.bindWidgets();

return true;

} else {

startLoaderForResults(loaderResults);

}

return false;

}

startLoaderForResults() 开始加载和返回数据结果

public void startLoaderForResults(LoaderResults results) {

synchronized (mLock) {

stopLoader();

mLoaderTask = new LoaderTask(mApp, mBgAllAppsList, sBgDataModel, results);

runOnWorkerThread(mLoaderTask);