Apps App crashes when i put an image button?!

[Nitrosolid]

Ok im beginner and i wanted to see put an image button on my app.When i put it and run it in eclipse it say "Unfortunately,About me App has stopped."

Here is my code

package com.example.aboutmeapp;



import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;

public class Main extends Activity {
    
    Button next;
    Button count;
    Button exit;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        next=(Button)findViewById(R.id.Btn1);
        count=(Button)findViewById(R.id.count);
        exit=(Button)findViewById(R.id.Exit);
        
        next.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                    
                        Intent n = new Intent(Main.this,About.class);
                        startActivity(n);
                    
                
            }
        });
        
        count.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent a = new Intent(Main.this,Startingpoint.class);
                startActivity(a);
                
            }
        });
        
        
        exit.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                
                
            }
        });
        
    }

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

}

XML

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#3EB6E6"
    android:gravity="center"
    android:orientation="vertical" >

    <Button
        android:id="@+id/Btn1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        
        android:gravity="center"
        android:text="About Me" />

    <Button
        android:id="@+id/count"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="Counter" />

    <ImageButton
        android:id="@+id/Exit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/a1" />
  
</LinearLayout>

Manifest

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

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

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
         <activity
            android:name=".About"
            android:label="@string/app_name" >
           
        </activity>
        
           <activity
            android:name=".Startingpoint"
            android:label="@string/app_name" >
           
        </activity>
        
         
        
        
    </application>

</manifest>

Can you guys help me out?

 

[lisa lisaa]

Is that OK treating ImageButton like a Button?)

 

[jedld]

Don't cast an ImageButton to Button, it sounds counterintuitive right? But the fact is ImageButton not a kind of Button (Check the java docs is not an ancestor of Button) and will cause a ClassCastException when you do it:

exit=(ImageButton)findViewById(R.id.Exit);

 

[lisa lisaa]

That is just what I mean)