android app Application cannot be cast to android app Activity

Question

I m trying to change a LinearLayout from another class  but when i run this code   public class IRC extends PircBot    ArrayList lt String gt  channels  ArrayList lt Integer gt  userCount  ArrayList lt String gt  topics   LinearLayout channelLayout  Context context   public IRC Context ctx        this setName  xxxx        channels   new ArrayList lt String gt         userCount   new ArrayList lt Integer gt         topics   new ArrayList lt String gt          context   ctx       channelLayout    LinearLayout    Activity  context  findViewById R id channels       i get a ClassCastException  context is the Main activity that extends Activity passed with a getApplicationContext     LOGCAT  05-08 17 53 55 102    3736-3799 g d allinonechat E AndroidRuntime  FATAL EXCEPTION  Thread-5357 java lang ClassCastException  android app Application cannot be cast to android app Activity         at g d xxx IRC  lt init gt  IRC java 34          at g d xxx MainActivity 1 run MainActivity java 49          at java lang Thread run Thread java 856

User · Answer

You are getting this error because the parameter required is Activity and you are passing it the Application  So  either you cast application to the Activity like   Activity getApplicationContext    Or you can just type the Activity like  MyActivity this

User · Answer

You can also try this one  override fun registerWith  registry  PluginRegistry            GeneratedPluginRegistrant registerWith registry as FlutterEngine               registry registrarFor  quot io flutter plugins firebasemessaging FirebaseMessagingPlugin quot          I think this one is far better solution than creating a new class

User · Answer

in case your project use dagger  and then this error show up you can add this at android manifest     lt application                     android  name    quot  BaseApplication quot              gt

User · Answer

In my case  when I m in an activity that extends from AppCompatActivity  it did not work Activity  getApplicationContext     I just putthis in its place

User · Answer

You are passing the Application Context not the Activity Context with   getApplicationContext      Wherever you are passing it pass this or ActivityName this instead   Since you are trying to cast the Context you pass  Application not Activity as you thought  to an Activity with   Activity    you get this exception because you can t cast the Application to Activity since Application is not a sub-class of Activity

[java] android.app.Application cannot be cast to android.app.Activity

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