Need help working out why my simple app crashes

Question

I've just got into trying to learn Java over the past few days. I've been jumping between tutorials, etc to try and pick up some of the basics.

Currently it starts on a splash screen for 5 seconds and then goes to another Action(is that right term?) which is the main page(called StartingPoint). However it crashes whilst jumping between those 2 pages. So basically, my question is why is it doing this and how can I fix it?

I created the main page first and that works fine on its own. It is just when trying to jump between those 2 pages.

Manifest - AMENDED:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jonysapp.test"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="15" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".Splash"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

    <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.jonysapp.test.StartingPoint"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="com.jonysapp.test.StartingPoint" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>
</application>

Splash.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" 
android:background="@drawable/mirley"
>


</LinearLayout>

Splash.Java: I have a feeling the code is wrong in here somewhere. Maybe with the Try Catch Finally?

package com.jonysapp.test;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;

public class Splash extends Activity{

@Override
protected void onCreate(Bundle MirleysVariable) {
    // TODO Auto-generated method stub
    super.onCreate(MirleysVariable);
    setContentView(R.layout.splash);
    Thread timer = new Thread(){
        public void run(){
            try{
                sleep(5000);

            } catch (InterruptedException e){
                e.printStackTrace();
            }finally{
                Intent openStartingPoint = new Intent(Splash.this, StartingPoint.class);
                Splash.this.startActivity(openStartingPoint);
            }
        }
    };
    timer.start();

}

}

StartingPoint.Java

package com.jonysapp.test;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class StartingPoint extends Activity {

int counter;
Button add, sub;
TextView display;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_starting_point);
    counter = 0;
    add = (Button) findViewById(R.id.bAdd);
    sub = (Button) findViewById(R.id.bSub);
    display = (TextView) findViewById(R.id.tvDisplay);
    add.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            counter++;
            display.setText("Your total is " + counter);

        }
    });
    sub.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            counter--;
            display.setText("Your total is " + counter);

        }
    });

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.starting_point, menu);
    return true;
}

}

LogCat:

04-21 12:48:08.004: D/dalvikvm(31290): GC_FOR_ALLOC freed 66K, 3% free 8887K/9091K, paused 16ms

04-21 12:48:08.014: I/dalvikvm-heap(31290): Grow heap (frag case) to 10.280MB for 1639696-byte allocation

04-21 12:48:08.044: D/dalvikvm(31290): GC_CONCURRENT freed 1K, 3% free 10487K/10759K, paused 2ms+2ms

04-21 12:48:08.084: D/TextLayoutCache(31290): Using debug level: 0 - Debug Enabled: 0

04-21 12:48:08.134: D/libEGL(31290): loaded /system/lib/egl/libGLES_android.so

04-21 12:48:08.134: D/libEGL(31290): loaded /system/lib/egl/libEGL_adreno200.so

04-21 12:48:08.144: D/libEGL(31290): loaded /system/lib/egl/libGLESv1_CM_adreno200.so

04-21 12:48:08.144: D/libEGL(31290): loaded /system/lib/egl/libGLESv2_adreno200.so

04-21 12:48:08.174: D/OpenGLRenderer(31290): Enabling debug mode 0

04-21 12:48:13.094: W/dalvikvm(31290): threadid=11: thread exiting with uncaught exception (group=0x2b542210)

04-21 12:48:13.094: E/AndroidRuntime(31290): FATAL EXCEPTION: Thread-2196

04-21 12:48:13.094: E/AndroidRuntime(31290): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.jonysapp.test/com.jonysapp.test.StartingPoint}; have you declared this activity in your AndroidManifest.xml?

04-21 12:48:13.094: E/AndroidRuntime(31290): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1508)

04-21 12:48:13.094: E/AndroidRuntime(31290): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1384)

04-21 12:48:13.094: E/AndroidRuntime(31290): at android.app.Activity.startActivityForResult(Activity.java:3190)

04-21 12:48:13.094: E/AndroidRuntime(31290): at android.app.Activity.startActivity(Activity.java:3297)

04-21 12:48:13.094: E/AndroidRuntime(31290): at com.jonysapp.test.Splash$1.run(Splash.java:23)

04-21 12:48:13.364: D/OpenGLRenderer(31290): Flushing caches (mode 0)

04-21 12:48:13.404: D/OpenGLRenderer(31290): Flushing caches (mode 1)

It's very likely I have posted too much code for this question so I apologise if I have bombarded this page with too much. Although if I have missed off anything important to help, please let me know!

As a side note, if you have any tips to stop me getting into any bad habits with the coding so far, that would be appreciated (but not necessary)

Thanks again for any help!

Answer 1

This is your issue:

04-21 12:48:13.094: E/AndroidRuntime(31290): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.jonysapp.test/com.jonysapp.test.StartingPoint}; have you declared this activity in your AndroidManifest.xml?

You have to declare the activity in your manifest, i.e.

<activity
    android:name="com.example.project.StartingPoint"
    android:label="@string/app_name">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

p.s.: added intent-filter for app launcher activity.

Hope this helps ... Cheers!

Answer 2

See this messge:

04-21 12:48:13.094: E/AndroidRuntime(31290): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.jonysapp.test/com.jonysapp.test.StartingPoint}; have you declared this activity in your AndroidManifest.xml

This means that you have some activity that you haven't declared in manifest file. you have used all capitals in here:

com.jonysapp.test.STARTINGPOINT

Try making it:

com.jonysapp.test.StartingPoint. 

The class name is case sensitive I guess. @Trinimon is right.