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Launcher 桌面源码笔记二

news 2026/5/12 16:56:45

Launcher 桌面源码笔记二

车模桌面加载成功后，需要各种交互

切换桌面处理

先补充如何切换桌面，初始化需要指定一个默认桌面，初始化其实两个桌面都会一起加载，假设默认是车模桌面，地图将不会初始化操作，但是地图桌面会内嵌到Launcher中

两个桌面是互斥的，基于这种模式下，就需要隐藏另一个桌面，因为切换动效的缘故，这里直接使用setTranslationX移出屏幕外处理

为了让两个桌面互斥，需要通过 mActivityManager.moveTaskToFront(getTaskId(), 0) 方法让两个taskview内嵌的activity只能一个处于前台，另一个pause

public void maybeBringEmbeddedTaskToForeground(int taskId) {if (taskId > 0) {// The task in TaskView should be in top to make it visible.// NOTE: Tried setTaskAlwaysOnTop before, the flag has some side effect to hinder// AccessibilityService from finding the correct window geometry: b/197247311mActivityManager.moveTaskToFront(taskId, /* flags= */ 0);}}

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同时将两个taskview内嵌后，又单独处理了各自的生命周期，达到互斥效果

3D桌面跟Launcher通讯

这里3D桌面需要额外处理，因为3D有个通讯进程，需要监听底层信号对车模进行同步操作，而由于unity无法监听到底层信号，所以需要跟launcher进行跨进程通讯

所以在3D处于pause时，需要将通讯进程也暂停，否则信号会一直发送，并且3D也无法接受信号

override fun setUnityVisible(visible: Boolean) {Log.w(TAG, "setUnityVisible:${visible}")val fragment = UnityPlayerFragment.Currentif (fragment != null && fragment.isLoadUnityFinish) {lastVisibleFromLauncher3 = visibleLog.w(TAG, "setUnityVisible:setInteractionMsg $visible")if (visible) {fragment.resumeUnityPlayer()} else {fragment.pauseUnityPlayer()}}}}

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跨进程通讯接口

package com.carlauncher;
import android.os.Bundle;
import com.carlauncher.IUnityBridgeCallback;interface UnityInterface {oneway void registerUnityBridgeCallback(IUnityBridgeCallback callback);oneway void unregisterUnityBridgeCallback(IUnityBridgeCallback callback);/*** 通知Unity 交互信息传递* 交互信息传输专用，除Adapter都放这里  EX：车衣按钮被点击 | 天气信息传递（bx1e） | 其他** @param msgType 消息类型* @param msgData 消息*/oneway void setInteractionMsg(int msgType, in Bundle bundle);/*** 设置Unity是否处于显示状态*/oneway void setUnityVisible(boolean visible);}

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在service中实现接口，通过setInteractionMsg方法跟unity车模交互通讯

通讯队列

信号不断的上报，需要缓存信号然后实时发送同步到3D，这里需要在子线程中不断轮询

public class AutoPullExecutor<K, E> extends Thread {private static final String TAG = "AutoPullExecutor";private final FilterCache<K, E> mCache;private final List<FilterCacheHelper.OnPullCacheCallback<K, E>> mCallbacks;private boolean mIsRunning = false;public AutoPullExecutor(FilterCache<K, E> cache) {mCache = cache;mCallbacks = new ArrayList<>();}@Overridepublic void run() {Log.d(TAG, "AutoPullExecutor is start");mIsRunning = true;while (mIsRunning) {FilterCache.Node<K, E> node = mCache.poll();if (node == null) {continue;}autoPullCallback(node);}}private void autoPullCallback(FilterCache.Node<K, E> node) {for (FilterCacheHelper.OnPullCacheCallback<K, E> callback : mCallbacks) {callback.onCache(node.key, node.element);}}void addPullCallback(FilterCacheHelper.OnPullCacheCallback<K, E> callback) {mCallbacks.add(callback);}boolean isRunning() {return mIsRunning;}void exit() {mIsRunning = false;interrupt();clear();}void clear() {mCallbacks.clear();}
}