I am new to android development and I have been having issues with Force Close on new Android Activity Pages.
My Structure is like this:
Main Page -> Menu Page (Works Fine) -> New Game Screen(force closes)
Call to the Activity:
public void btnNewGame_Click(View view)
{
Intent i = new Intent(this, NewGameScreen.class);
startActivityForResult(i, ACTIVITY_CREATE);
}
Manifest
<activity android:name=".NewGameScreen"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ExpandableListView
android:id="#+id/eLVGameList"
android:layout_width="match_parent"
android:layout_gravity="center_vertical"
android:layout_weight=".75"
android:background="#null" android:layout_height="0dip">
</ExpandableListView>
</LinearLayout>
NewGameScreenActivity
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.loadgame);
ExpandableListView epView = (ExpandableListView) findViewById(R.id.eLVGameList);
ExpandableListAdapter mAdapter = new GameListAdapter();
epView.setAdapter(mAdapter);
Errors:
03-05 20:16:57.375: E/AndroidRuntime(887): FATAL EXCEPTION: main
03-05 20:16:57.375: E/AndroidRuntime(887): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.helloandroid/com.example.helloandroid.NewGameScreen}: java.lang.RuntimeException: Your content must have a ExpandableListView whose id attribute is 'android.R.id.list'
03-05 20:16:57.375: E/AndroidRuntime(887): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
03-05 20:16:57.375: E/AndroidRuntime(887): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
03-05 20:16:57.375: E/AndroidRuntime(887): at android.app.ActivityThread.access$600(ActivityThread.java:123)
03-05 20:16:57.375: E/AndroidRuntime(887): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
03-05 20:16:57.375: E/AndroidRuntime(887): at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 20:16:57.375: E/AndroidRuntime(887): at android.os.Looper.loop(Looper.java:137)
03-05 20:16:57.375: E/AndroidRuntime(887): at android.app.ActivityThread.main(ActivityThread.java:4424)
03-05 20:16:57.375: E/AndroidRuntime(887): at java.lang.reflect.Method.invokeNative(Native Method)
03-05 20:16:57.375: E/AndroidRuntime(887): at java.lang.reflect.Method.invoke(Method.java:511)
03-05 20:16:57.375: E/AndroidRuntime(887): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-05 20:16:57.375: E/AndroidRuntime(887): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-05 20:16:57.375: E/AndroidRuntime(887): at dalvik.system.NativeStart.main(Native Method)
03-05 20:16:57.375: E/AndroidRuntime(887): Caused by: java.lang.RuntimeException: Your content must have a ExpandableListView whose id attribute is 'android.R.id.list'
03-05 20:16:57.375: E/AndroidRuntime(887): at android.app.ExpandableListActivity.onContentChanged(ExpandableListActivity.java:222)
03-05 20:16:57.375: E/AndroidRuntime(887): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:254)
03-05 20:16:57.375: E/AndroidRuntime(887): at android.app.Activity.setContentView(Activity.java:1835)
03-05 20:16:57.375: E/AndroidRuntime(887): at com.example.helloandroid.NewGameScreen.onCreate(NewGameScreen.java:22)
03-05 20:16:57.375: E/AndroidRuntime(887): at android.app.Activity.performCreate(Activity.java:4465)
03-05 20:16:57.375: E/AndroidRuntime(887): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
03-05 20:16:57.375: E/AndroidRuntime(887): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
03-05 20:16:57.375: E/AndroidRuntime(887): ... 11 more
Change your ExpandableListView id with this
android:id="#android:id/list"
and if your class extends Activity then change it to
public class className extends ListActivity
and you can get your ExpandableListView by calling the method
ExpandableListView listView = getListView();
The answer is very simple, you just forgot to insert the NewGameScreen Activity's Entry in the AndroidManiFest.xml Write down following line in your AndroidManifest.xml file before the tag.
<activity android:name=".NewGameScreen"></activity>
And also important thing that your NewGameScreen class must extends Activity
You need to give the id of your ListView as android:id="#android:id/list" , if you are extending LIstActivity. Then you can get your ListView handler from getLIstView();
If you are extending Activity, then you can give any other id to your ListView and get it using findViewbyId()
From the LOgCat trace, it looks like you are using ListActivity.
Related
I am running the following code and it gives me NullPointerException in the line iv4.setVisibility(View.INVISIBLE)
Please suggest. Thanks
Code:
ImageView iv4;
public void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_score);
iv4= (ImageView) findViewById(R.id.imageView4);
iv4.setVisibility(View.INVISIBLE);
}
<RelativeLayout
xmlns:android="schemas.android.com/apk/res/android";
android:id="#+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView android:id="#+id/imageView4"
android:layout_width="110dp"
android:layout_height="110dp"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:src="#drawable/hg" />
</RelativeLayout>
The stack trace is as follows:
03-05 03:49:25.477: E/AndroidRuntime(1070): FATAL EXCEPTION: main
03-05 03:49:25.477: E/AndroidRuntime(1070): java.lang.RuntimeException: Unable to start activity ComponentInfo{bitcream.candyhive.candy/bitcream.candyhive.candy.ScoreActivity}: java.lang.NullPointerException
03-05 03:49:25.477: E/AndroidRuntime(1070): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
03-05 03:49:25.477: E/AndroidRuntime(1070): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
03-05 03:49:25.477: E/AndroidRuntime(1070): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
03-05 03:49:25.477: E/AndroidRuntime(1070): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
03-05 03:49:25.477: E/AndroidRuntime(1070): at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 03:49:25.477: E/AndroidRuntime(1070): at android.os.Looper.loop(Looper.java:123)
03-05 03:49:25.477: E/AndroidRuntime(1070): at android.app.ActivityThread.main(ActivityThread.java:3683)
03-05 03:49:25.477: E/AndroidRuntime(1070): at java.lang.reflect.Method.invokeNative(Native Method)
03-05 03:49:25.477: E/AndroidRuntime(1070): at java.lang.reflect.Method.invoke(Method.java:507)
03-05 03:49:25.477: E/AndroidRuntime(1070): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-05 03:49:25.477: E/AndroidRuntime(1070): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-05 03:49:25.477: E/AndroidRuntime(1070): at dalvik.system.NativeStart.main(Native Method)
03-05 03:49:25.477: E/AndroidRuntime(1070): Caused by: java.lang.NullPointerException
03-05 03:49:25.477: E/AndroidRuntime(1070): at bitcream.candyhive.candy.ScoreActivity.onCreate(ScoreActivity.java:42)
03-05 03:49:25.477: E/AndroidRuntime(1070): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-05 03:49:25.477: E/AndroidRuntime(1070): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
03-05 03:49:25.477: E/AndroidRuntime(1070): ... 11 more
03-05 03:49:28.297: I/Process(1070): Sending signal. PID: 1070 SIG: 9
NullPointerException in the line iv4.setVisibility(View.INVISIBLE)
Probably there is no ImageView with the id imageView4 in activity_score.xml.
Either you referenced the wrong layout or your layout does not contain the imageview with the id mentioned.
Edit:
Change
<RelativeLayout
xmlns:android="schemas.android.com/apk/res/android"
to
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
You will get NullPointerException if findViewById does not find a view with the id mentioned in the current inflated layout.
I have a problem. I am developing a game in Unity3d which uses the official Facebook SDK and NerdGPG for Google Play Game Services. However, there is an annoying bug:
WHen I want to see the Achievements or Leaderboards, it opnes the UI, but AFTER I CLOSE the UI, then the game crashes. The Logcat tells the following:
03-05 00:09:54.325: E/AndroidRuntime(10810): Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=9002, result=0, data=null} to activity {com.radioactivewasp.flyingwasp/com.facebook.unity.FBUnityPlayerActivity}: java.lang.NullPointerException
03-05 00:09:54.325: E/AndroidRuntime(10810): at android.app.ActivityThread.deliverResults(ActivityThread.java:3182)
03-05 00:09:54.325: E/AndroidRuntime(10810): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3225)
03-05 00:09:54.325: E/AndroidRuntime(10810): at android.app.ActivityThread.access$1100(ActivityThread.java:140)
03-05 00:09:54.325: E/AndroidRuntime(10810): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1275)
03-05 00:09:54.325: E/AndroidRuntime(10810): at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 00:09:54.325: E/AndroidRuntime(10810): at android.os.Looper.loop(Looper.java:137)
03-05 00:09:54.325: E/AndroidRuntime(10810): at android.app.ActivityThread.main(ActivityThread.java:4898)
03-05 00:09:54.325: E/AndroidRuntime(10810): at java.lang.reflect.Method.invokeNative(Native Method)
03-05 00:09:54.325: E/AndroidRuntime(10810): at java.lang.reflect.Method.invoke(Method.java:511)
03-05 00:09:54.325: E/AndroidRuntime(10810): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
03-05 00:09:54.325: E/AndroidRuntime(10810): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
03-05 00:09:54.325: E/AndroidRuntime(10810): at dalvik.system.NativeStart.main(Native Method)
03-05 00:09:54.325: E/AndroidRuntime(10810): Caused by: java.lang.NullPointerException
03-05 00:09:54.325: E/AndroidRuntime(10810): at com.facebook.unity.FBUnityPlayerActivity.onActivityResult(FBUnityPlayerActivity.java:15)
03-05 00:09:54.325: E/AndroidRuntime(10810): at android.app.Activity.dispatchActivityResult(Activity.java:5390)
03-05 00:09:54.325: E/AndroidRuntime(10810): at android.app.ActivityThread.deliverResults(ActivityThread.java:3178)
Anybody know what could be the solution?
It looks like your Facebook plugin Activity doesn't know how to handle the onActivityResult() callback when you use the RC_UNUSED(9002) requestID.So I imagine you would want to modify your Facebook Player activity such that the NerdGPG plugin handles the callback.
I'm trying to retrieve a name stred in SQLite table, despite the database has 11 or more records, when I try to retrieve any name from the stored records, The App. Crashs.
Java code:
OnClickListener btn_NavaigateListsner = new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (!btn_Save.isEnabled()) {
int c = mpoh.getCurrentRowNumber();
Toast.makeText(getBaseContext(), ""+mpoh.getMP_Name(0), Toast.LENGTH_SHORT).show();
Bundle bundle = new Bundle();
//bundle.putString("name", mpoh.getMP_Name(c));
//bundle.putDouble("lat", mpoh.getMP_Lat(c));
//bundle.putDouble("lng", mpoh.getMP_Lng(c));
//bundle.putString("date", mpoh.getMP_Date(c));
//bundle.putString("time", mpoh.getMP_Time(c));
intent01 = new Intent(MPData.this, MPInfo.class);
intent01.putExtras(bundle);
startActivity(intent01);
}// End of If
}
};
Method that retrieves the stored name:
public String getMP_Name(long id) {
SQLiteDatabase db = this.getReadableDatabase();
SQLiteCursor c = (SQLiteCursor) db.rawQuery("SELECT name FROM MPData WHERE "+
BaseColumns._ID+" = "+
Long.toString(id) +" AND name IS NOT NULL ", null);
c.moveToFirst();
String r = c.getString(0);
c.close();
db.close();
return r;
}
some of LogCat's output:
03-05 12:16:48.288: E/AndroidRuntime(973): FATAL EXCEPTION: main
03-05 12:16:48.288: E/AndroidRuntime(973): android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
03-05 12:16:48.288: E/AndroidRuntime(973): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:580)
03-05 12:16:48.288: E/AndroidRuntime(973): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:214)
03-05 12:16:48.288: E/AndroidRuntime(973): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:41)
03-05 12:16:48.288: E/AndroidRuntime(973): at com.androidbook.MP.MP_DB.getMP_Name(MP_DB.java:45)
03-05 12:16:48.288: E/AndroidRuntime(973): at com.androidbook.MP.MPData$1.onClick(MPData.java:57)
03-05 12:16:48.288: E/AndroidRuntime(973): at android.view.View.performClick(View.java:2485)
03-05 12:16:48.288: E/AndroidRuntime(973): at android.view.View$PerformClick.run(View.java:9080)
03-05 12:16:48.288: E/AndroidRuntime(973): at android.os.Handler.handleCallback(Handler.java:587)
03-05 12:16:48.288: E/AndroidRuntime(973): at android.os.Handler.dispatchMessage(Handler.java:92)
03-05 12:16:48.288: E/AndroidRuntime(973): at android.os.Looper.loop(Looper.java:130)
03-05 12:16:48.288: E/AndroidRuntime(973): at android.app.ActivityThread.main(ActivityThread.java:3683)
03-05 12:16:48.288: E/AndroidRuntime(973): at java.lang.reflect.Method.invokeNative(Native Method)
03-05 12:16:48.288: E/AndroidRuntime(973): at java.lang.reflect.Method.invoke(Method.java:507)
03-05 12:16:48.288: E/AndroidRuntime(973): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-05 12:16:48.288: E/AndroidRuntime(973): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-05 12:16:48.288: E/AndroidRuntime(973): at dalvik.system.NativeStart.main(Native Method)
03-05 12:32:19.897: E/AndroidRuntime(1022): FATAL EXCEPTION: main
03-05 12:32:19.897: E/AndroidRuntime(1022): android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
03-05 12:32:19.897: E/AndroidRuntime(1022): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:580)
03-05 12:32:19.897: E/AndroidRuntime(1022): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:214)
03-05 12:32:19.897: E/AndroidRuntime(1022): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:41)
03-05 12:32:19.897: E/AndroidRuntime(1022): at com.androidbook.MP.MP_DB.getMP_Name(MP_DB.java:45)
03-05 12:32:19.897: E/AndroidRuntime(1022): at com.androidbook.MP.MPData$1.onClick(MPData.java:57)
03-05 12:32:19.897: E/AndroidRuntime(1022): at android.view.View.performClick(View.java:2485)
03-05 12:32:19.897: E/AndroidRuntime(1022): at android.view.View$PerformClick.run(View.java:9080)
03-05 12:32:19.897: E/AndroidRuntime(1022): at android.os.Handler.handleCallback(Handler.java:587)
03-05 12:32:19.897: E/AndroidRuntime(1022): at android.os.Handler.dispatchMessage(Handler.java:92)
03-05 12:32:19.897: E/AndroidRuntime(1022): at android.os.Looper.loop(Looper.java:130)
03-05 12:32:19.897: E/AndroidRuntime(1022): at android.app.ActivityThread.main(ActivityThread.java:3683)
03-05 12:32:19.897: E/AndroidRuntime(1022): at java.lang.reflect.Method.invokeNative(Native Method)
03-05 12:32:19.897: E/AndroidRuntime(1022): at java.lang.reflect.Method.invoke(Method.java:507)
03-05 12:32:19.897: E/AndroidRuntime(1022): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-05 12:32:19.897: E/AndroidRuntime(1022): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-05 12:32:19.897: E/AndroidRuntime(1022): at dalvik.system.NativeStart.main(Native Method)
03-05 12:39:24.627: E/AndroidRuntime(1093): FATAL EXCEPTION: main
03-05 12:39:24.627: E/AndroidRuntime(1093): android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:580)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:214)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:41)
03-05 12:39:24.627: E/AndroidRuntime(1093): at com.androidbook.MP.MP_DB.getMP_Name(MP_DB.java:45)
03-05 12:39:24.627: E/AndroidRuntime(1093): at com.androidbook.MP.MPData$1.onClick(MPData.java:57)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.View.performClick(View.java:2485)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.View.onKeyUp(View.java:4257)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.widget.TextView.onKeyUp(TextView.java:4587)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.KeyEvent.dispatch(KeyEvent.java:1280)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.View.dispatchKeyEvent(View.java:3855)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789)
03-05 12:39:24.627: E/AndroidRuntime(1093): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1687)
03-05 12:39:24.627: E/AndroidRuntime(1093): at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1120)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.app.Activity.dispatchKeyEvent(Activity.java:2073)
03-05 12:39:24.627: E/AndroidRuntime(1093): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1663)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.ViewRoot.deliverKeyEventToViewHierarchy(ViewRoot.java:2560)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2535)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.view.ViewRoot.handleMessage(ViewRoot.java:1867)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.os.Looper.loop(Looper.java:130)
03-05 12:39:24.627: E/AndroidRuntime(1093): at android.app.ActivityThread.main(ActivityThread.java:3683)
03-05 12:39:24.627: E/AndroidRuntime(1093): at java.lang.reflect.Method.invokeNative(Native Method)
03-05 12:39:24.627: E/AndroidRuntime(1093): at java.lang.reflect.Method.invoke(Method.java:507)
03-05 12:39:24.627: E/AndroidRuntime(1093): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-05 12:39:24.627: E/AndroidRuntime(1093): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-05 12:39:24.627: E/AndroidRuntime(1093): at dalvik.system.NativeStart.main(Native Method)
The code looks fine to me. Are you 100% sure you have an entry in your DB with an _id corresponding to 0?
If you call getMP_Name with an invalid _id then the exception will get raised as you posted it.
You should check for this case as follows:
if (c.getCount()==0) return "";
// rest of code
But I wouldn't do it like this anyway because your current implementation of getMP_XXX is very inefficient because you hit the database for each field and each row. You should minimise your number of queries and then iterate over the resulting cursor.
Look at the following line :
String r = c.getString(0);
You are not safe checking your cursor and just assuming a result was recieved.
Check you SQL query and add a safe check for making sure your cursor has retrieved results.
Currently for my 2.x preference screens, in every PreferenceActivity I add the line setContentView(R.layout.activity_preferences); to have a custom layout in my activities.
The activity_preferences.xml layout file looks like this:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout style="#style/TitleBar">
<ImageButton style="#style/TitleBarAction"
android:src="#drawable/ic_title_home"
android:onClick="onHomeClick" />
<ImageView style="#style/TitleBarSeparator" />
<eu.vranckaert.worktime.utils.view.CustomTextView
style="#style/TitleBarText" android:text="#string/lbl_preferences_title"/>
</LinearLayout>
<ListView android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#android:id/list"/>
</LinearLayout>
For my 3.x and up application I am building the preferences according to the example over here: http://developer.android.com/reference/android/preference/PreferenceActivity.html.
In order to apply the same layout to my 3.x app, I tried was to add the setContentView(..) in the 3.x PreferenceActivity.
Result on phone: this works fine on the first activity, then when loading a fragment (with the real preferences in them) my style is not applied
Result on tablet: crash:
ERROR/AndroidRuntime(2208): FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{eu.vranckaert.worktime/eu.vranckaert.worktime.activities.preferences.PreferencesICSActivity}: java.lang.IllegalArgumentException: No view found for id 0x10202d4 for fragment TimeRegistrationsPreferencesFragment{4101ed38 #0 id=0x10202d4}
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: No view found for id 0x10202d4 for fragment TimeRegistrationsPreferencesFragment{4101ed38 #0 id=0x10202d4}
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:822)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1032)
at android.app.BackStackRecord.run(BackStackRecord.java:622)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1382)
at android.app.Activity.performStart(Activity.java:4474)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1929)
... 11 more
When I try to apply the layout file on my fragments using getActivity().setContentView(R.layout.activity_preferences); the result is:
for phone: the activity is still shown fine, when going into a category it crashes:
ERROR/AndroidRuntime(1320): FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{eu.vranckaert.worktime/eu.vranckaert.worktime.activities.preferences.PreferencesICSActivity}: java.lang.IllegalArgumentException: No view found for id 0x10202d4 for fragment DateTimePreferencesFragment{412a0d78 #0 id=0x10202d4}
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: No view found for id 0x10202d4 for fragment TimeRegistrationsPreferencesFragment{412a0d78 #0 id=0x10202d4}
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:822)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1032)
at android.app.BackStackRecord.run(BackStackRecord.java:622)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1382)
at android.app.Activity.performStart(Activity.java:4474)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1929)
... 11 more
for tablet: same crash as before...
How should I apply this layout file to my fragment activity...? Or should I create a new layout file?
I'm begginer in android Programming
My Question is...
I wanted to play backgroud Music.
So I read a code like this
public class Welcome extends Activity {
/** Called when the activity is first created. */
MediaPlayer player;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
player=MediaPlayer.create(Welcome.this, R.raw.song);
player.start();
But this code doesn't work in emulator. Error occured...
My Logcat is here..
03-05 15:36:36.588: ERROR/AndroidRuntime(954): FATAL EXCEPTION: main
03-05 15:36:36.588: ERROR/AndroidRuntime(954): java.lang.RuntimeException: Unable to start activity ComponentInfo{younkyung.app.lord_of_spelling/younkyung.app.lord_of_spelling.Welcome}: java.lang.NullPointerException
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at android.os.Looper.loop(Looper.java:123)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at java.lang.reflect.Method.invokeNative(Native Method)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at java.lang.reflect.Method.invoke(Method.java:521)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at dalvik.system.NativeStart.main(Native Method)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): Caused by: java.lang.NullPointerException
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at younkyung.app.lord_of_spelling.Welcome.onCreate(Welcome.java:25)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
03-05 15:36:36.588: ERROR/AndroidRuntime(954): ... 11 more
I cannot understand what's wrong...
Please Help..! ...
You need to use one of the supported file formats. WMA is not one of them.