【Android】设置三方应用为默认Launcher

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文章讲述了如何在Android系统中，通过指定应用的包名，设置该应用为默认的Launcher。方法涉及查询PackageManager，获取与指定包名关联的ActivityInfo，并存储设置状态。

问题：替换原生Launcher，换成指定包名设置的应用为默认Launcher
ActivityManagerService.java
地址：\frameworks\base\services\core\java\com\android\server\am\

//add set xxx default launcher 20231219 start
/**
 * 通过指定包名设置，可以换成读取配置来进行指定，操作性高，但这里为指定应用，所以不做可配置功能
 */
private String pkgname = "xxx.xxxxx.xxxx";
private ActivityInfo setDefaultLauncher() {
    ActivityInfo aInfo =null;
    //查找是否有指定包名的应用
    PackageManager pm = mContext.getPackageManager();
    Intent newintent = new Intent(Intent.ACTION_MAIN);
    newintent.addCategory(Intent.CATEGORY_HOME);
    List<ResolveInfo> resolveInfoList = pm.queryIntentActivities(newintent, 0);

    boolean bisLoadLaucher = false;
    if(resolveInfoList != null){
        int size = resolveInfoList.size();
        boolean ispaired = false;

        for(int i = 0; i < size; i++){
            ResolveInfo rInfo = resolveInfoList.get(i);

            Log.d(TAG, " resolvePackageName = "+rInfo.activityInfo.packageName);

            if(rInfo.activityInfo.packageName.equals(pkgname)){
                aInfo = rInfo.activityInfo;
                android.provider.Settings.System.putString(mContext.getContentResolver(), "default.pkgname",  pkgname);
                android.provider.Settings.System.putInt(mContext.getContentResolver(), "defalutLauncherSetState", 1);
                ispaired = true;
                break;
            }
        }

        if(!ispaired && !bisLoadLaucher){
            try {
                pm.getPackageInfo(pkgname, PackageManager.GET_ACTIVITIES);
            } catch (PackageManager.NameNotFoundException e) {
                Log.d(TAG, " def launcher pkgname no exist ");
                android.provider.Settings.System.putString(mContext.getContentResolver(), "default.pkgname",  "");
                android.provider.Settings.System.putInt(mContext.getContentResolver(), "defaultLauncherSetState", 0);
                return null;
            }

        }
    }
    return aInfo;
}
//add set xxx default launcher 20231219 end

调用

boolean startHomeActivityLocked(int userId, String reason) {
    ...
    if (aInfo != null) {
        //add for set xxx default launcher 20231219 start
            ActivityInfo customAInfo =  setDefaultLauncher();
            if (null != customAInfo) {
                aInfo = customAInfo;
            }
            //add for set xxx default launcher 20231219 end
    }
}

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