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Thread: error when switch activity in android

  1. #1
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    Default error when switch activity in android

    hai, i am new in android and android game is my first project. i am having problem with switching activity. my project contains 3 activities and 3 layout. there's no error in console but the application can't be run and the emulator says: "The Application TamaDroid (process tamagochi.app) has stopped unexpectedly. Please try again"
    i am using android emulator 2.3 and API 9.

    here is the code:

    tamagochi.java

    public class tamagochi extends ListActivity {
     
    	public void onCreate(Bundle savedInstanceState) {
    	     super.onCreate(savedInstanceState);
    	     setContentView(R.layout.tamagochi_layout);
     
    	     Button loginButton = (Button) findViewById(R.id.login);
    	     loginButton.setOnClickListener(new View.OnClickListener() {
    	             public void onClick(View view) {
    	                 Intent myIntent = new Intent(view.getContext(), login.class);
    	                 startActivityForResult(myIntent, 0);
    	             }
     
    	     });
     
    	     Button joinButton = (Button) findViewById(R.id.join);
    	     joinButton.setOnClickListener(new View.OnClickListener() {
    	             public void onClick(View view) {
    	                 Intent myIntent = new Intent(view.getContext(), register.class);
    	                 startActivityForResult(myIntent, 0);
    	             }
     
    	     });
     
    	     Button exitButton = (Button) findViewById(R.id.exit);
    	     exitButton.setOnClickListener(new View.OnClickListener() {
    	             public void onClick(View view) {
    	                 System.exit(0);
    	             }
     
    	     });
    	}
    }

    AndroidManifest.xml

    <?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="tamagochi.app"
          android:versionCode="1"
          android:versionName="1.0">
        <application android:icon="@drawable/icon" android:label="@string/app_name">
            <activity android:name=".tamagochi"
                      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=".choosepet"></activity>
    		<activity android:name=".login"></activity>
    		<activity android:name=".petMain"></activity>
    		<activity android:name=".register"></activity>
        </application>
        <uses-sdk android:minSdkVersion="9" />
    </manifest>

    and here is the screenshot of error:

    error.android.JPG

    and here is the error in logcat

    10-24 11:41:08.006: ERROR/AndroidRuntime(644): FATAL EXCEPTION: main
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): java.lang.RuntimeException: Unable to start activity ComponentInfo{tamagochi.app/tamagochi.app.tamagochi}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.app.ActivityThread.performLaunchActivity(A ctivityThread.java:1622)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.app.ActivityThread.handleLaunchActivity(Ac tivityThread.java:1638)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.app.ActivityThread.access$1500(ActivityThr ead.java:117)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.app.ActivityThread$H.handleMessage(Activit yThread.java:928)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.os.Handler.dispatchMessage(Handler.java:99 )
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.os.Looper.loop(Looper.java:123)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.app.ActivityThread.main(ActivityThread.jav a:3647)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at java.lang.reflect.Method.invokeNative(Native Method)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at java.lang.reflect.Method.invoke(Method.java:507)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at com.android.internal.os.ZygoteInit$MethodAndArgsCa ller.run(ZygoteInit.java:839)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at com.android.internal.os.ZygoteInit.main(ZygoteInit .java:597)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at dalvik.system.NativeStart.main(Native Method)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.app.ListActivity.onContentChanged(ListActi vity.java:243)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at com.android.internal.policy.impl.PhoneWindow.setCo ntentView(PhoneWindow.java:210)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.app.Activity.setContentView(Activity.java: 1657)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at tamagochi.app.tamagochi.onCreate(tamagochi.java:18 )
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.app.Instrumentation.callActivityOnCreate(I nstrumentation.java:1047)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): at android.app.ActivityThread.performLaunchActivity(A ctivityThread.java:1586)
    10-24 11:41:08.006: ERROR/AndroidRuntime(644): ... 11 more
    please help me, i am counting on your help. thank you..
    Last edited by yefta; October 24th, 2011 at 12:47 AM.


  2. #2
    Junior Member marksquall's Avatar
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    Default Re: error when switch activity in android

    Hello yefta,

    Wow, that was a nice one trying to create games in Android (how I wish I could also create one). Anyways, I noticed on your LogCat, it says:


    10-24 11:41:08.006: ERROR/AndroidRuntime(644): java.lang.RuntimeException: Unable to start activity ComponentInfo{tamagochi.app/tamagochi.app.tamagochi}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'

    I think you need to open your list.xml in Design view then add a ListView component.

    I hope that helps. God bless you.

    Warm regards,

    Mark Squall

  3. #3
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    Default Re: error when switch activity in android

    thanks for the advice mark, but i've figured out the erors. i am using a button to change the layout and i don't need to use ListActivity, and one more fault is i cast the ImageButton to Button and that's very stupid fault.. LOL..
    Thanks again mark.

  4. #4
    Junior Member marksquall's Avatar
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    Default Re: error when switch activity in android [SOLVED]

    Hello yefta,

    I am sorry if I did not solve your problem, but I am thankful because this thread will be of help to me and to others who might encounter the same problem.

    Good luck to US in our Java programming in Android.

    God bless to all javaprogrammingforums members and administrator.


    Warm regards,

    Mark Squall

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