Question

I’m trying to make my first list adapter with android, and it comes up with the list, but when I click the items, nothing happens. My only guess is the comment I have after the line that defines Class cvar.

package scouting.form;

import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class Menu extends ListActivity{

    String classes[] = {"SCOUTING","LOGIN","MAIN"};

    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setListAdapter(new ArrayAdapter<String>(Menu.this,android.R.layout.simple_list_item_1,classes));
    }

    @Override
    protected void onListItemClick(ListView l, View v, int position,long id)
    {
        super.onListItemClick(l, v, position, id);
        String cheese= "com.cody.graham."+classes[position];
        try{
            Class cvar=Class.forName(cheese);     //Eclipse has a warning on this line "Class is a raw type. References to generic type Class<T> should be parameterized". I don't really know what that means.
            Intent intention=new Intent(Menu.this,cvar);
            startActivity(intention);
        }catch(ClassNotFoundException e){
            e.printStackTrace();
        }
    }
}

Edit:

Part of the AndroidManifest:

<activity android:name=".splash_screen" android:label="@string/title_activity_splash" >
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

<activity android:name=".Login" android:label="@string/title_activity_login" android:exported="false">
    <intent-filter>
        <action android:name="com.cody.graham.LOGIN" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

<activity android:name=".Scouting" android:label="@string/title_activity_scouting" android:exported="false">
    <intent-filter>
        <action android:name="com.cody.graham.SCOUTING" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

Answer 1

Firstly, remove the <intent-filter> sections from your manifest for both .Scouting and .Login (leave the one for .splash_screen). Unless you need any of your Activity classes to be started from 3rd-party (external) apps, it is not necessary to declare action-based <intent-filter> sections – it’s also not good practice.

Secondly, do as wtsang02 suggests and change the classes string array to…

String classes[] = {"Scouting","Login","splash_screen"};

Also, assuming the other Activity classes (such as Scouting etc) are in the same package as Menu, change this line…

String cheese= "com.cody.graham."+classes[position];

to be…

String cheese= "scouting.form." +classes[position];

…and to get rid of the eclipse warning, this line…

Class cvar=Class.forName(cheese);

…to…

Class<?> cvar=Class.forName(cheese);