gibs gibs - 9 months ago 53
Android Question

ActivityNotFoundException when opening another activity with Intent

Before you downvote: I have googled this for hour+ now and still can't understand why this isn't working. I am following the official docs.

I want to open another Activity from my main Activity with an Intent.
This is my main Activity class (

public class MainActivity extends Activity {

public void onCreate(Bundle savedInstanceState) {

LinearLayout l = new LinearLayout(this);
Button b = new Button(this);
b.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent goToActivity2 = new Intent(MainActivity.this, Activity2.class);


And this is

public class Activity2 extends Activity {


If I run the app I will see the main activity with a gray button. If I click on the button I get an Exception:

android.content.ActivityNotFoundException: Unable to find explicit activity class {com.testing.kaarelp.androidtest2/com.testing.kaarelp.androidtest2.Activity2}; have you declared this activity in your AndroidManifest.xml?

Why am I getting the Exception? Whats wrong here?

------------- edit1 ---------------

okay I declared the other Activity in the manifest like this:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android=""

<activity android:name=".MainActivity">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<activity android:name=".Activity2" />


... and the app works now! Yet I am looking at another working code example right now that has multiple Activity-s that are not declared in the manifest and it still works. What is going on?!

------------- edit2 ---------------

Ahh I figured it out. The code example I was looking at contained multiple
-s, not

Answer Source

You must declare the Activity in your AndroidManifest.xml file:

<activity android:name=".Activity2"/>