AndroidRuntime(528): java.lang.RuntimeException: Unable to instantiate activity

Question

the error that i m getting :-

 04-08 00:37:48.540: E/AndroidRuntime(528): java.lang.RuntimeException: 
 Unable to instantiate activity ComponentInfo{com.android.collision/
com.android.collision.GameViewActivity}: java.lang.InstantiationException: 
can't instantiate class com.android.collision.GameViewActivity; no empty constructor

other deatils of the coding portion and i have to extend my main activity class by SurfaceView

my manifest xml

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

<uses-sdk android:minSdkVersion="14" />

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <activity
        android:label="@string/app_name"
        android:name=".GameViewActivity" >
        <intent-filter >
            <action android:name="android.intent.action.MAIN" />

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

</manifest>

And my mail activity is :-

public class GameViewActivity extends SurfaceView {
/** Called when the activity is first created. */


 public GameViewActivity(Context context) {
       super(context);


 }

dongshengcn · Accepted Answer · 2013-04-07 20:04:57Z

3

Your activity must extend an Activity class.

http://developer.android.com/reference/android/app/Activity.html

answered Apr 7, 2013 at 20:04

dongshengcn

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3 Comments

Sumit Singh Over a year ago

i need to extend my activity class by SurfaceView

dongshengcn Over a year ago

if you need to use SurfaceView, you need to add it to your Activity's layout, do not subclass it.

Sumit Singh Over a year ago

thanks for your attention on my question but i dont know how to add it in my activity class

Sikander · Accepted Answer · 2013-04-07 20:07:49Z

0

java.lang.RuntimeException: Unable to instantiate activity

so do it like this

public class GameViewActivity extends  Activity

or you can extend any activity from your project eg.

public class GameViewActivity extends  GameActivity

answered Apr 7, 2013 at 20:07

Sikander

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3 Comments

Sumit Singh Over a year ago

i need to extend my activity class by SurfaceView

Sikander Over a year ago

so that file has no Activity ? it should have extend that activity not class .

Sumit Singh Over a year ago

ok then how to add the SurfaceView in my activityclass after extend it by Activity

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