I have an SQLite databse in my app which holds some data in it. I am trying to rename something inside the table and this is how I'm trying to do it:
public void renameName(String newName, String oldName){
db.execSQL("UPDATE "+SQLiteHelper.MUSIC_TABLE_NAME+" SET "+SQLiteHelper.MUSIC_NAME+"='"+newName+"' WHERE "+SQLiteHelper.MUSIC_NAME+"='"+oldName+"'");
}
I'm calling this method like this:
Log.i("TAG", "Trying to rename "+element.getTitle()+" to "+renameTo);
db.renameName(renameTo, element.getTitle());
My app crashes when I call this. As you can see I call log.i to see if those variables are null but they are NOT (I get the null pointer exception).
Here's the logcat file:
03-03 17:50:39.329: E/AndroidRuntime(21154): FATAL EXCEPTION: main
03-03 17:50:39.329: E/AndroidRuntime(21154): java.lang.NullPointerException
03-03 17:50:39.329: E/AndroidRuntime(21154): at com.matejhacin.beautifulvoicerecorder.database.DatabaseHandler.renameName(DatabaseHandler.java:63)
03-03 17:50:39.329: E/AndroidRuntime(21154): at com.matejhacin.beautifulvoicerecorder.LibraryFragment$2.onClick(LibraryFragment.java:250)
03-03 17:50:39.329: E/AndroidRuntime(21154): at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:166)
03-03 17:50:39.329: E/AndroidRuntime(21154): at android.os.Handler.dispatchMessage(Handler.java:99)
03-03 17:50:39.329: E/AndroidRuntime(21154): at android.os.Looper.loop(Looper.java:137)
03-03 17:50:39.329: E/AndroidRuntime(21154): at android.app.ActivityThread.main(ActivityThread.java:5289)
03-03 17:50:39.329: E/AndroidRuntime(21154): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 17:50:39.329: E/AndroidRuntime(21154): at java.lang.reflect.Method.invoke(Method.java:525)
03-03 17:50:39.329: E/AndroidRuntime(21154): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739)
03-03 17:50:39.329: E/AndroidRuntime(21154): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
03-03 17:50:39.329: E/AndroidRuntime(21154): at dalvik.system.NativeStart.main(Native Method)
Open your database first before using it, it's the database that is null and not the strings.
Happens :-)
Related
I don't know why the app crashes whenever it's supposed to go to the next Activity. I made a practice app that works as it should when using the same format. I uploaded the files to gist.github.
The error is
1216-1216/com.example.chiozokamalu.newfreshstart E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.ArrayIndexOutOfBoundsException
at com.example.chiozokamalu.newfreshstart.MainActivity.onClick(MainActivity.java:164)
at android.view.View.performClick(View.java:2485)
at android.view.View$PerformClick.run(View.java:9080)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3683)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
On line 164 of MainActivity.java:
questionView.setText(questions[questionIndex]); // set the text to the next question
EDIT: After Varun helped me, I get a new error which is
1307-1307/com.example.chiozokamalu.newfreshstart E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.chiozokamalu.newfreshstart/com.example.chiozokamalu.newfreshstart.Results1}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
at android.app.ActivityThread.access$1500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3683)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.example.chiozokamalu.newfreshstart.Results1.onCreate(Results1.java:58)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
at android.app.ActivityThread.access$1500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3683)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
The questions array at line no. 164 is going out of bound that means questionIndex is greater than the total length of the questions array. So you should add a check on the length before extracting value from the array.
You have added the check but after that you incremented the value so either you modify the if condition to if (questionIndex < questions.length -1)
or modify the questionIndex variable before the if condition
You are getting problem because you haven't initiated resultView9 that is why it is null and giving nullpointer, just initiatlise it as you done with other and everything is fine. You have initialised the resultView8 twice just add resultview9 over there
case R.id.action_logout:
Intent offer = new Intent(context,OfferDetailActivity.class);
//offer.addFlags(offer.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
FacebookHelper.logoutUser(this);
startActivity(offer);
The Above mentioned code cause an error and force closes the application i cant understand what the error
The logcat is showing below Errors
03-03 10:06:51.590: D/AndroidRuntime(8707): Shutting down VM
03-03 10:06:51.590: W/dalvikvm(8707): threadid=1: thread exiting with uncaught exception (group=0x40018578)
03-03 10:06:51.590: E/AndroidRuntime(8707): FATAL EXCEPTION: main
03-03 10:06:51.590: E/AndroidRuntime(8707): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cartperk.android.cartperk/com.cartperk.android.cartperk.ui.OfferDetailActivity}: java.lang.NullPointerException
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.os.Handler.dispatchMessage(Handler.java:99)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.os.Looper.loop(Looper.java:123)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.app.ActivityThread.main(ActivityThread.java:3687)
03-03 10:06:51.590: E/AndroidRuntime(8707): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 10:06:51.590: E/AndroidRuntime(8707): at java.lang.reflect.Method.invoke(Method.java:507)
03-03 10:06:51.590: E/AndroidRuntime(8707): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
03-03 10:06:51.590: E/AndroidRuntime(8707): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
03-03 10:06:51.590: E/AndroidRuntime(8707): at dalvik.system.NativeStart.main(Native Method)
03-03 10:06:51.590: E/AndroidRuntime(8707): Caused by: java.lang.NullPointerException
03-03 10:06:51.590: E/AndroidRuntime(8707): at com.cartperk.android.cartperk.ui.OfferDetailFragment.onActivityCreated(OfferDetailFragment.java:92)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1508)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1086)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:1884)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:566)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1129)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.app.Activity.performStart(Activity.java:3791)
03-03 10:06:51.590: E/AndroidRuntime(8707): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1624)
03-03 10:06:51.590: E/AndroidRuntime(8707): ... 11 more
Thank You
I've made my Android app tablet optimized and I followed the tutorial here:
Everything is great, but I am trying to select an item (say, the 1st item) with a button in the ActionBar.
I tried this answer to use performItemClick but on I've got error reports of java.lang.IllegalStateException
in android.support.v4.app.ListFragment.ensureList, java.lang.IllegalStateException: Content view not yet created, and java.lang.NullPointerException
in android.content.ComponentName.<init>
I've tried checking if the ListView is null and still get the error reports on the Play Store. How do I properly select an item in my list programmatically?
Update to add logcat and the code is virtually identical to the tutorials in the links:
Logcat A:
java.lang.IllegalStateException: Content view not yet created
at android.support.v4.app.ListFragment.ensureList(ListFragment.java:328)
at android.support.v4.app.ListFragment.getListView(ListFragment.java:222)
at com.ccwilcox.meteorshower.MeteorList.showMeteorDetails(MeteorList.java:69)
at com.ccwilcox.meteorshower.MeteorList.onListItemClick(MeteorList.java:62)
at android.support.v4.app.ListFragment$2.onItemClick(ListFragment.java:58)
at android.widget.AdapterView.performItemClick(AdapterView.java:298)
at android.widget.AbsListView.performItemClick(AbsListView.java:1280)
at com.ccwilcox.meteorshower.MainActivity.viewUpcomingEvent(MainActivity.java:648)
at com.ccwilcox.meteorshower.MainActivity.onOptionsItemSelected(MainActivity.java:534)
at android.app.Activity.onMenuItemSelected(Activity.java:2606)
at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:361)
at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:1045)
at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:735)
at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:149)
at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:874)
at com.android.internal.view.menu.ActionMenuView.invokeItem(ActionMenuView.java:592)
at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:149)
at android.view.View.performClick(View.java:4222)
at android.view.View$PerformClick.run(View.java:17273)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4895)
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:994)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
at dalvik.system.NativeStart.main(Native Method)
Logcat B:
java.lang.NullPointerException
at android.content.ComponentName.<init>(ComponentName.java:75)
at android.content.Intent.<init>(Intent.java:2874)
at com.ccwilcox.meteorshower.MeteorList.showMeteorDetails(MeteorList.java:86)
at com.ccwilcox.meteorshower.MeteorList.onListItemClick(MeteorList.java:62)
at android.support.v4.app.ListFragment$2.onItemClick(ListFragment.java:58)
at android.widget.AdapterView.performItemClick(AdapterView.java:284)
at android.widget.ListView.performItemClick(ListView.java:3701)
at com.ccwilcox.meteorshower.MainActivity.viewUpcomingEvent(MainActivity.java:648)
at com.ccwilcox.meteorshower.MainActivity.onOptionsItemSelected(MainActivity.java:534)
at android.app.Activity.onMenuItemSelected(Activity.java:2205)
at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:361)
at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:779)
at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:143)
at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:861)
at com.android.internal.view.menu.IconMenuView.invokeItem(IconMenuView.java:532)
at com.android.internal.view.menu.IconMenuItemView.performClick(IconMenuItemView.java:122)
at android.view.View$PerformClick.run(View.java:9152)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
Update 2
And here is the code that is causing the problem:
if (mListFragment.listView != null) {
mListFragment.listView.performItemClick(mListFragment.listView.getAdapter().getView(position, null, null), position, mListFragment.listView.getAdapter().getItemId(position));
}
When I run my android application it gives an error "The application has stopped working,please try again". Please help me to solve this problem. i have created a method which gets called when the button gets clicked. When I include the code for calling another class in this method it shows the above error & when I remove that code it neither shows the error nor goes ahead when listview etc. gets clicked. Can you please check my code and help me please.
CODE:
public void myClickHandler(View view)
{
//Toast.makeText(this, "yesss",Toast.LENGTH_LONG).show();
setContentView(R.layout.screen1);
ListAdapter adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, city);
ListView FirstProjectActivity = (ListView) findViewById(R.id.mylist1);
FirstProjectActivity.setAdapter(adapter);
Intent myIntent = new Intent(FirstProjectActivity.this,
City.class);
FirstProjectActivity.this.startActivity(myIntent);
//startActivity(new Intent(FirstProjectActivity.this, City.class));
}
LOGCAT is as follows:
03-02 18:56:28.136: D/AndroidRuntime(316): Shutting down VM
03-02 18:56:28.136: W/dalvikvm(316): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
03-02 18:56:28.226: E/AndroidRuntime(316): FATAL EXCEPTION: main
03-02 18:56:28.226: E/AndroidRuntime(316): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.FirstProject/com.example.FirstProject.FirstProjectActivity}: java.lang.NullPointerException
03-02 18:56:28.226: E/AndroidRuntime(316): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
03-02 18:56:28.226: E/AndroidRuntime(316): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-02 18:56:28.226: E/AndroidRuntime(316): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-02 18:56:28.226: E/AndroidRuntime(316): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-02 18:56:28.226: E/AndroidRuntime(316): at android.os.Handler.dispatchMessage(Handler.java:99)
03-02 18:56:28.226: E/AndroidRuntime(316): at android.os.Looper.loop(Looper.java:123)
03-02 18:56:28.226: E/AndroidRuntime(316): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-02 18:56:28.226: E/AndroidRuntime(316): at java.lang.reflect.Method.invokeNative(Native Method)
03-02 18:56:28.226: E/AndroidRuntime(316): at java.lang.reflect.Method.invoke(Method.java:521)
03-02 18:56:28.226: E/AndroidRuntime(316): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-02 18:56:28.226: E/AndroidRuntime(316): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-02 18:56:28.226: E/AndroidRuntime(316): at dalvik.system.NativeStart.main(Native Method)
03-02 18:56:28.226: E/AndroidRuntime(316): Caused by: java.lang.NullPointerException
03-02 18:56:28.226: E/AndroidRuntime(316): at com.example.FirstProject.FirstProjectActivity.onCreate(FirstProjectActivity.java:37)
03-02 18:56:28.226: E/AndroidRuntime(316): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-02 18:56:28.226: E/AndroidRuntime(316): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
03-02 18:56:28.226: E/AndroidRuntime(316): ... 11 more
03-02 18:56:35.396: I/Process(316): Sending signal. PID: 316 SIG: 9
03-02 19:02:51.836: D/AndroidRuntime(351): Shutting down VM
03-02 19:02:51.836: W/dalvikvm(351): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
03-02 19:02:51.866: E/AndroidRuntime(351): FATAL EXCEPTION: main
03-02 19:02:51.866: E/AndroidRuntime(351): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.FirstProject/com.example.FirstProject.FirstProjectActivity}: java.lang.NullPointerException
03-02 19:02:51.866: E/AndroidRuntime(351): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
03-02 19:02:51.866: E/AndroidRuntime(351): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-02 19:02:51.866: E/AndroidRuntime(351): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-02 19:02:51.866: E/AndroidRuntime(351): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-02 19:02:51.866: E/AndroidRuntime(351): at android.os.Handler.dispatchMessage(Handler.java:99)
03-02 19:02:51.866: E/AndroidRuntime(351): at android.os.Looper.loop(Looper.java:123)
03-02 19:02:51.866: E/AndroidRuntime(351): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-02 19:02:51.866: E/AndroidRuntime(351): at java.lang.reflect.Method.invokeNative(Native Method)
03-02 19:02:51.866: E/AndroidRuntime(351): at java.lang.reflect.Method.invoke(Method.java:521)
03-02 19:02:51.866: E/AndroidRuntime(351): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-02 19:02:51.866: E/AndroidRuntime(351): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-02 19:02:51.866: E/AndroidRuntime(351): at dalvik.system.NativeStart.main(Native Method)
03-02 19:02:51.866: E/AndroidRuntime(351): Caused by: java.lang.NullPointerException
03-02 19:02:51.866: E/AndroidRuntime(351): at com.example.FirstProject.FirstProjectActivity.onCreate(FirstProjectActivity.java:37)
03-02 19:02:51.866: E/AndroidRuntime(351): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
03-02 19:02:51.866: E/AndroidRuntime(351): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
03-02 19:02:51.866: E/AndroidRuntime(351): ... 11 more
03-02 19:03:03.647: I/Process(351): Sending signal. PID: 351 SIG: 9
03-02 20:11:17.722: W/KeyCharacterMap(379): No keyboard for id 0
03-02 20:11:17.926: W/KeyCharacterMap(379): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
03-02 20:11:28.441: D/dalvikvm(379): GC_EXPLICIT freed 3121 objects / 172672 bytes in 1696ms
03-03 01:03:02.696: W/KeyCharacterMap(406): No keyboard for id 0
03-03 01:03:02.696: W/KeyCharacterMap(406): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
03-03 01:03:08.566: D/dalvikvm(406): GC_EXPLICIT freed 2874 objects / 162408 bytes in 192ms
03-03 01:33:06.566: D/AndroidRuntime(432): Shutting down VM
03-03 01:33:06.566: W/dalvikvm(432): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
03-03 01:33:06.726: E/AndroidRuntime(432): FATAL EXCEPTION: main
03-03 01:33:06.726: E/AndroidRuntime(432): java.lang.IllegalStateException: Could not execute method of the activity
03-03 01:33:06.726: E/AndroidRuntime(432): at android.view.View$1.onClick(View.java:2072)
03-03 01:33:06.726: E/AndroidRuntime(432): at android.view.View.performClick(View.java:2408)
03-03 01:33:06.726: E/AndroidRuntime(432): at android.view.View$PerformClick.run(View.java:8816)
03-03 01:33:06.726: E/AndroidRuntime(432): at android.os.Handler.handleCallback(Handler.java:587)
03-03 01:33:06.726: E/AndroidRuntime(432): at android.os.Handler.dispatchMessage(Handler.java:92)
03-03 01:33:06.726: E/AndroidRuntime(432): at android.os.Looper.loop(Looper.java:123)
03-03 01:33:06.726: E/AndroidRuntime(432): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-03 01:33:06.726: E/AndroidRuntime(432): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 01:33:06.726: E/AndroidRuntime(432): at java.lang.reflect.Method.invoke(Method.java:521)
03-03 01:33:06.726: E/AndroidRuntime(432): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-03 01:33:06.726: E/AndroidRuntime(432): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-03 01:33:06.726: E/AndroidRuntime(432): at dalvik.system.NativeStart.main(Native Method)
03-03 01:33:06.726: E/AndroidRuntime(432): Caused by: java.lang.reflect.InvocationTargetException
03-03 01:33:06.726: E/AndroidRuntime(432): at com.example.FirstProject.FirstProjectActivity.myClickHandler(FirstProjectActivity.java:69)
03-03 01:33:06.726: E/AndroidRuntime(432): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 01:33:06.726: E/AndroidRuntime(432): at java.lang.reflect.Method.invoke(Method.java:521)
03-03 01:33:06.726: E/AndroidRuntime(432): at android.view.View$1.onClick(View.java:2067)
03-03 01:33:06.726: E/AndroidRuntime(432): ... 11 more
03-03 01:33:06.726: E/AndroidRuntime(432): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.FirstProject/com.example.FirstProject.City}; have you declared this activity in your AndroidManifest.xml?
03-03 01:33:06.726: E/AndroidRuntime(432): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
03-03 01:33:06.726: E/AndroidRuntime(432): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
03-03 01:33:06.726: E/AndroidRuntime(432): at android.app.Activity.startActivityForResult(Activity.java:2817)
03-03 01:33:06.726: E/AndroidRuntime(432): at android.app.Activity.startActivity(Activity.java:2923)
03-03 01:33:06.726: E/AndroidRuntime(432): ... 15 more
03-03 01:33:08.956: I/Process(432): Sending signal. PID: 432 SIG: 9
03-03 01:34:05.387: D/AndroidRuntime(460): Shutting down VM
03-03 01:34:05.387: W/dalvikvm(460): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
03-03 01:34:05.417: E/AndroidRuntime(460): FATAL EXCEPTION: main
03-03 01:34:05.417: E/AndroidRuntime(460): java.lang.IllegalStateException: Could not execute method of the activity
03-03 01:34:05.417: E/AndroidRuntime(460): at android.view.View$1.onClick(View.java:2072)
03-03 01:34:05.417: E/AndroidRuntime(460): at android.view.View.performClick(View.java:2408)
03-03 01:34:05.417: E/AndroidRuntime(460): at android.view.View$PerformClick.run(View.java:8816)
03-03 01:34:05.417: E/AndroidRuntime(460): at android.os.Handler.handleCallback(Handler.java:587)
03-03 01:34:05.417: E/AndroidRuntime(460): at android.os.Handler.dispatchMessage(Handler.java:92)
03-03 01:34:05.417: E/AndroidRuntime(460): at android.os.Looper.loop(Looper.java:123)
03-03 01:34:05.417: E/AndroidRuntime(460): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-03 01:34:05.417: E/AndroidRuntime(460): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 01:34:05.417: E/AndroidRuntime(460): at java.lang.reflect.Method.invoke(Method.java:521)
03-03 01:34:05.417: E/AndroidRuntime(460): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-03 01:34:05.417: E/AndroidRuntime(460): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-03 01:34:05.417: E/AndroidRuntime(460): at dalvik.system.NativeStart.main(Native Method)
03-03 01:34:05.417: E/AndroidRuntime(460): Caused by: java.lang.reflect.InvocationTargetException
03-03 01:34:05.417: E/AndroidRuntime(460): at com.example.FirstProject.FirstProjectActivity.myClickHandler(FirstProjectActivity.java:70)
03-03 01:34:05.417: E/AndroidRuntime(460): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 01:34:05.417: E/AndroidRuntime(460): at java.lang.reflect.Method.invoke(Method.java:521)
03-03 01:34:05.417: E/AndroidRuntime(460): at android.view.View$1.onClick(View.java:2067)
03-03 01:34:05.417: E/AndroidRuntime(460): ... 11 more
03-03 01:34:05.417: E/AndroidRuntime(460): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.FirstProject/com.example.FirstProject.City}; have you declared this activity in your AndroidManifest.xml?
03-03 01:34:05.417: E/AndroidRuntime(460): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
03-03 01:34:05.417: E/AndroidRuntime(460): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
03-03 01:34:05.417: E/AndroidRuntime(460): at android.app.Activity.startActivityForResult(Activity.java:2817)
03-03 01:34:05.417: E/AndroidRuntime(460): at android.app.Activity.startActivity(Activity.java:2923)
03-03 01:34:05.417: E/AndroidRuntime(460): ... 15 more
03-03 01:34:11.016: I/Process(460): Sending signal. PID: 460 SIG: 9
03-03 01:35:33.547: D/AndroidRuntime(490): Shutting down VM
03-03 01:35:33.557: W/dalvikvm(490): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
03-03 01:35:33.577: E/AndroidRuntime(490): FATAL EXCEPTION: main
03-03 01:35:33.577: E/AndroidRuntime(490): java.lang.IllegalStateException: Could not execute method of the activity
03-03 01:35:33.577: E/AndroidRuntime(490): at android.view.View$1.onClick(View.java:2072)
03-03 01:35:33.577: E/AndroidRuntime(490): at android.view.View.performClick(View.java:2408)
03-03 01:35:33.577: E/AndroidRuntime(490): at android.view.View$PerformClick.run(View.java:8816)
03-03 01:35:33.577: E/AndroidRuntime(490): at android.os.Handler.handleCallback(Handler.java:587)
03-03 01:35:33.577: E/AndroidRuntime(490): at android.os.Handler.dispatchMessage(Handler.java:92)
03-03 01:35:33.577: E/AndroidRuntime(490): at android.os.Looper.loop(Looper.java:123)
03-03 01:35:33.577: E/AndroidRuntime(490): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-03 01:35:33.577: E/AndroidRuntime(490): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 01:35:33.577: E/AndroidRuntime(490): at java.lang.reflect.Method.invoke(Method.java:521)
03-03 01:35:33.577: E/AndroidRuntime(490): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-03 01:35:33.577: E/AndroidRuntime(490): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-03 01:35:33.577: E/AndroidRuntime(490): at dalvik.system.NativeStart.main(Native Method)
03-03 01:35:33.577: E/AndroidRuntime(490): Caused by: java.lang.reflect.InvocationTargetException
03-03 01:35:33.577: E/AndroidRuntime(490): at com.example.FirstProject.FirstProjectActivity.myClickHandler(FirstProjectActivity.java:70)
03-03 01:35:33.577: E/AndroidRuntime(490): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 01:35:33.577: E/AndroidRuntime(490): at java.lang.reflect.Method.invoke(Method.java:521)
03-03 01:35:33.577: E/AndroidRuntime(490): at android.view.View$1.onClick(View.java:2067)
03-03 01:35:33.577: E/AndroidRuntime(490): ... 11 more
03-03 01:35:33.577: E/AndroidRuntime(490): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.FirstProject/com.example.FirstProject.City}; have you declared this activity in your AndroidManifest.xml?
03-03 01:35:33.577: E/AndroidRuntime(490): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
03-03 01:35:33.577: E/AndroidRuntime(490): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
03-03 01:35:33.577: E/AndroidRuntime(490): at android.app.Activity.startActivityForResult(Activity.java:2817)
03-03 01:35:33.577: E/AndroidRuntime(490): at android.app.Activity.startActivity(Activity.java:2923)
03-03 01:35:33.577: E/AndroidRuntime(490): ... 15 more
03-03 01:35:39.176: I/Process(490): Sending signal. PID: 490 SIG: 9
03-03 01:36:06.947: D/AndroidRuntime(517): Shutting down VM
03-03 01:36:06.947: W/dalvikvm(517): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
03-03 01:36:06.967: E/AndroidRuntime(517): FATAL EXCEPTION: main
03-03 01:36:06.967: E/AndroidRuntime(517): java.lang.IllegalStateException: Could not execute method of the activity
03-03 01:36:06.967: E/AndroidRuntime(517): at android.view.View$1.onClick(View.java:2072)
03-03 01:36:06.967: E/AndroidRuntime(517): at android.view.View.performClick(View.java:2408)
03-03 01:36:06.967: E/AndroidRuntime(517): at android.view.View$PerformClick.run(View.java:8816)
03-03 01:36:06.967: E/AndroidRuntime(517): at android.os.Handler.handleCallback(Handler.java:587)
03-03 01:36:06.967: E/AndroidRuntime(517): at android.os.Handler.dispatchMessage(Handler.java:92)
03-03 01:36:06.967: E/AndroidRuntime(517): at android.os.Looper.loop(Looper.java:123)
03-03 01:36:06.967: E/AndroidRuntime(517): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-03 01:36:06.967: E/AndroidRuntime(517): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 01:36:06.967: E/AndroidRuntime(517): at java.lang.reflect.Method.invoke(Method.java:521)
03-03 01:36:06.967: E/AndroidRuntime(517): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-03 01:36:06.967: E/AndroidRuntime(517): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-03 01:36:06.967: E/AndroidRuntime(517): at dalvik.system.NativeStart.main(Native Method)
03-03 01:36:06.967: E/AndroidRuntime(517): Caused by: java.lang.reflect.InvocationTargetException
03-03 01:36:06.967: E/AndroidRuntime(517): at com.example.FirstProject.FirstProjectActivity.myClickHandler(FirstProjectActivity.java:70)
03-03 01:36:06.967: E/AndroidRuntime(517): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 01:36:06.967: E/AndroidRuntime(517): at java.lang.reflect.Method.invoke(Method.java:521)
03-03 01:36:06.967: E/AndroidRuntime(517): at android.view.View$1.onClick(View.java:2067)
03-03 01:36:06.967: E/AndroidRuntime(517): ... 11 more
03-03 01:36:06.967: E/AndroidRuntime(517): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.FirstProject/com.example.FirstProject.City}; have you declared this activity in your AndroidManifest.xml?
03-03 01:36:06.967: E/AndroidRuntime(517): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
03-03 01:36:06.967: E/AndroidRuntime(517): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
03-03 01:36:06.967: E/AndroidRuntime(517): at android.app.Activity.startActivityForResult(Activity.java:2817)
03-03 01:36:06.967: E/AndroidRuntime(517): at android.app.Activity.startActivity(Activity.java:2923)
03-03 01:36:06.967: E/AndroidRuntime(517): ... 15 more
03-03 01:36:13.306: I/Process(517): Sending signal. PID: 517 SIG: 9
When you want to detect if you click on an item you need to implement the onItemClickedListener i will give you an example below like i would do it:
listView.setOnItemClickListener(new MyOnitemClickListener());
//no i make my own class that impelemnts the onitemclicklistener
public class MyOnitemClickListener implements OnItemClickListener {
private int position = 0;
public void onItemClick(AdapterView<?> parent, View view, int pos,
long lat) {
// clicked on parent.getid()
if (parent.getId() == R.id.listView) {
//do something
}
}
}
after a crash, try looking for the first couple of red lines the LOGCAT spews to you as they usually explain what happened.
the following line :
java.lang.NullPointerException
(in line 5) showed up on you log, it usually means your trying to use an uninitialized object.
refer to:
What is a NullPointerException, and how do I fix it?
I have no Idea why I get this error :/
Exception class java.lang.NullPointerException
Source method Jax$7.onClick()
java.lang.NullPointerException
at com.reg.lolsoundboard.Jax$7.onClick(Jax.java:83)
at android.view.View.performClick(View.java:2485)
at android.view.View$PerformClick.run(View.java:9089)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:3806)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)
Obviously you are dereferencing a variable in line 83 of the file Jax.java where the variable is null.
java.lang.NullPointerException
at com.reg.lolsoundboard.Jax$7.onClick(Jax.java:83)
If show the relevant code, people may be able to help you.