android怎么判断要启动的应用存不存在

Question

如题所述

Answer 1

public static boolean isPkgInstalled(Context context,String pkgName) {
PackageInfo packageInfo = null;
try {
packageInfo = context.getPackageManager().getPackageInfo(pkgName, 0);
} catch (NameNotFoundException e) {
packageInfo = null;
e.printStackTrace();
}
if (packageInfo == null) {
return false;
} else {
return true;
}
}

Answer 2

设置——应用管理

Answer 3

任务管理器可以看