Android11.0内置第三方Launcher并设置为默认，保留Launcher3并可切换

Android11.0内置第三方Launcher并设置为默认，保留Launcher3并可切换

Android11.0内置第三方Launcher并设置为默认，保留Launcher3并可切换

本文描述Android11中内置第三方应用为Launcher并保住自带的Launcher3，刷机后系统启动时选择内置第三方应用显示并设置为默认Launcher。

添加自定义默认launcher属性，修改文件路径：/device/rockchip/rk356x/rk356x.prop；

persist.sys.def_launcher=
persist.sys.def_launcher_enable=false

在具体的产品中设置自定义属性，例如在rk3568_r中，修改路径：

/device/rockchip/rk356x/rk3568_r/rk3568_r.mk

PRODUCT_PROPERTY_OVERRIDES += persist.sys.def_launcher=com.yjz.launcherPRODUCT_PROPERTY_OVERRIDES += persist.sys.def_launcher_enable=true

选择并设置为默认launcher，修改路径 /frameworks/base/core/java/com/android/internal/app/ResolverActivity.java；

    public final void onPostListReady(ResolverListAdapter listAdapter, boolean doPostProcessing,            boolean rebuildCompleted) {        if (isAutolaunching()) {            return;        }        //新增        if (rebuildCompleted && hasSetDefLauncher()) {            return;        }      //*******省略代码******    }    final boolean postRebuildListInternal(boolean rebuildCompleted) {        //*******省略代码******        //添加        if (rebuildCompleted && (hasSetDefLauncher() || maybeAutolaunchActivity())) {            return true;        }        //*******省略代码******    }    //添加    private boolean hasSetDefLauncher() {        if (SystemProperties.getBoolean("persist.sys.def_launcher_enable", false)) {            String defLauncher = SystemProperties.get("persist.sys.def_launcher", null);            if (defLauncher != null && !"".equals(defLauncher)) {                int size = mMultiProfilePagerAdapter.getActiveListAdapter().getDisplayResolveInfoCount();                for (int i = 0; i < size; i++) {                    DisplayResolveInfo dInfo = mMultiProfilePagerAdapter.getActiveListAdapter().getDisplayResolveInfo(i);                    if (null != dInfo && defLauncher.equals(dInfo.getResolveInfo().activityInfo.packageName)) {                        Log.d(TAG, "find need set default launcher, set default launcher--->" + dInfo.getResolveInfo().activityInfo.packageName);                        startSelected(i, true, false);                        return true;                    }                }            }        }        return false;    }

ResolverActivity里系统中有多个launcher时，是异步查询并通过onPostListReady()方法回调回来在进行设置，这时可能有弹窗闪一下，ResolverListAdapter可以对查询数据逻辑处理只返回内置应用一条数据，ResolverActivity中通过postRebuildListInternal()处理，修改路径：

/frameworks/base/core/java/com/android/internal/app/ResolverListAdapter.java；

    protected boolean rebuildList(boolean doPostProcessing) {        //********省略代码******        if (mBaseResolveList != null) {            currentResolveList = mUnfilteredResolveList = new ArrayList();            mResolverListController.addResolveListDedupe(currentResolveList,                    mResolverListCommunicator.getTargetIntent(),                    mBaseResolveList);        } else {            currentResolveList = mUnfilteredResolveList =                    mResolverListController.getResolversForIntent(                            /* shouldGetResolvedFilter= */ true,                            mResolverListCommunicator.shouldGetActivityMetadata(),                            mIntents);            if (currentResolveList == null) {                processSortedList(currentResolveList, doPostProcessing);                return true;            }            List originalList =                    mResolverListController.filterIneligibleActivities(currentResolveList,                            true);            if (originalList != null) {                mUnfilteredResolveList = originalList;            }        }                //添加        if (null != currentResolveList && SystemProperties.getBoolean("persist.sys.def_launcher_enable", false)) {            String defLauncher = SystemProperties.get("persist.sys.def_launcher", null);            if (defLauncher != null && !"".equals(defLauncher)) {                for (ResolvedComponentInfo info : currentResolveList) {                    ResolveInfo resolveInfo = info.getResolveInfoAt(0);                    if (defLauncher.equals(resolveInfo.activityInfo.packageName)) {                        currentResolveList = new ArrayList();                        currentResolveList.add(info);                        Log.d(TAG, "find set default launcher--->" + resolveInfo.activityInfo.packageName);                        break;                    }                }            }        }                //********省略代码******        // So far we only support a single other profile at a time.        // The first one we see gets special treatment.    }

如果当前为Launcher3显示，在设置-应用–默认应用-主屏幕应用中，切换设置默认为第三方Launcher应用，在第三方应用中，点击导航栏返回按键时，会返回到Launcher3，是因为切换设置默认launcher后，前一个的任务栈还存在，需要删除，修改路径： /packages/apps/PermissionController/src/com/android/permissioncontroller/role/model/HomeRoleBehavior.java；

//********省略代码******    @Override    public void onHolderSelectedAsUser(@NonNull Role role, @NonNull String packageName,            @NonNull UserHandle user, @NonNull Context context) {        // Launch the new home app so the change is immediately visible even if the home button is        // not pressed.                //这里是发送一个广播到自定义服务中去删除旧的任务栈        Intent it = new Intent("com.yjz.ACTION_SET_DEF_LAUNCHER_ENABLE");        it.putExtra("packageName", packageName);        context.sendBroadcast(it);        Intent intent = new Intent(Intent.ACTION_MAIN)                .addCategory(Intent.CATEGORY_HOME)                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        context.startActivity(intent);    }//********省略代码******}

自定义服务中清除旧任务栈逻辑：

    //********省略代码******    private class CustomReceiver extends BroadcastReceiver {        @Override        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            if ("com.yjz.ACTION_SET_DEF_LAUNCHER_ENABLE".equals(action)) {                String packageName = intent.getStringExtra("packageName");                if (null != packageName && !"".equals(packageName)) {                    String defLauncher = SystemProperties.get("persist.sys.def_launcher", null);                    if (defLauncher != null && !"".equals(defLauncher) && defLauncher.equals(packageName)) {                        SystemProperties.set("persist.sys.def_launcher_enable", "true");                    } else {                        SystemProperties.set("persist.sys.def_launcher_enable", "false");                    }                    clearOldLauncherTask(packageName, context);                }            }        }    }    private void clearOldLauncherTask(String packageName, Context context) {        ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);        List list = manager.getRunningTasks(Integer.MAX_VALUE);        if (null != list) {            for (ActivityManager.RunningTaskInfo item : list) {                if (item.configuration.windowConfiguration.getActivityType() == WindowConfiguration.ACTIVITY_TYPE_HOME) {                    if (!item.realActivity.getPackageName().equals(packageName)) {                        final int tId = item.taskId;                        try {                            ActivityTaskManager.getService().removeTask(tId);                        } catch (RemoteException e) {                            Log.w(TAG, "Failed to remove task=" + tId, e);                        }                    }                }            }        }    }

添加内置第三方应用launcher，在vendor/yjz/launcher/下放置应用及Android.mk

/vendor/yjz/launcher/Android.mk

LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_MODULE := YJZLauncherLOCAL_MODULE_CLASS := APPSLOCAL_MODULE_TAGS := optionalLOCAL_SRC_FILES := $(LOCAL_MODULE).apkLOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)LOCAL_CERTIFICATE := PRESIGNEDinclude $(BUILD_PREBUILT)