在清单中注册应用程序类？

Question

I have one Application class to keep the global state of my application. But I'm unable to register it in Manifest file? Any idea how to do this?

Answer 1

If it derives from Application, add the fully qualified (namespace + class name) as the android:name parameter of the application element in your manifest.

<application
        android:name="com.you.yourapp.ApplicationEx"

Or if the class' package can be described as relative to the package in the manifest tag, then just start with a . :

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.you.yourapp">

    <application
        android:name=".ApplicationEx"

Answer 2

but in case you are already using some library like branch.io's library then most probably your manifest

<application name="">

property will already have some name like

`<application name="io.referral.BranchApp">

in that case you need to first extend your application class, like below:

public class Application extends BranchApp

and then register your application in manifest as:

android:name="absdevelopers.com.brankreferal.Application"

this works perfectly for me :) i hope it helps someone in trouble :)

Answer 3

If you are using a MultiDex application you will already have "android:name" in use so instead extend android.support.multidex.MultiDexApplication :

public class MyApplication extends MultiDexApplication {...}

And add it to the Android manifest:

android:name="app.package.MyApplication"

Answer 4

If the activity is included as a dependency that you can lauch a class this should solve it in 2021.

Add tools:ignore="MissingClass" to your activity element in the Android manfifest file

example

<activity
            android:name="com.google.android.gms.oss.licenses.OssLicensesActivity"
            android:screenOrientation="portrait"
            android:theme="@style/LicensesTheme"
            tools:ignore="MissingClass"/>