open android own launcher from my application

问题

hi Its been 2 days looking for this simple problem. I want to launch Android own launcher from my application EVEN if its not set as default.

   final PackageManager packageManager=getPackageManager();
   Intent intent = packageManager.getLaunchIntentForPackage("com.android.launcher");

this return null for Android own launcher but if I try custom launcher is give me successfully

回答1:

Found the solution, after investigating source code of getLaunchIntentForPackage. As per documentation,

The current implementation will look first for a main activity in the category CATEGORY_INFO, next for a main activity in the category CATEGORY_LAUNCHER, or return null if neither are found.

So, the function don't look for CATEGORY_HOME, i rewrote it in following way, it worked perfectly.

Intent intentToResolve = new Intent(Intent.ACTION_MAIN);
intentToResolve.addCategory(Intent.CATEGORY_HOME);
intentToResolve.setPackage("com.android.launcher");
ResolveInfo ri = getPackageManager().resolveActivity(intentToResolve, 0);
if (ri != null) 
{
    Intent intent = new Intent(intentToResolve);
    intent.setClassName(ri.activityInfo.applicationInfo.packageName, ri.activityInfo.name);
    intent.setAction(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_HOME);
    startActivity(intent);
}

回答2:

Are you sure the default Google Android Launcher being installed on your device? If not, then it's truly NULL.

来源：https://stackoverflow.com/questions/8518768/open-android-own-launcher-from-my-application