Develop Reference

AVD crashes saying 'Unfortunately, libcocos2dx has crashed'

I just loaded my app created by cocos2dx-3.10 and when I open with it an AVD (again I haven't done any modifications to the app) the app crashes and gives the error: Unfortunately, libcocos2dx has crashed.
here is what I get in my android Monitor:
03-05 18:34:56.668 1435-1435/? D/dalvikvm: Not late-enabling CheckJNI (already on)
03-05 18:34:56.989 1435-1435/com.trying.name E/Trace: error opening trace file: No such file or directory (2)
03-05 18:34:57.419 1435-1435/com.trying.name D/AndroidRuntime: Shutting down VM
03-05 18:34:57.419 1435-1435/com.trying.name W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0xb2f2b288)
03-05 18:34:57.518 1435-1435/com.trying.name E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.UnsatisfiedLinkError: Couldn't load cocos2dcpp: findLibrary returned null
at java.lang.Runtime.loadLibrary(Runtime.java:365)
at java.lang.System.loadLibrary(System.java:535)
at org.cocos2dx.lib.Cocos2dxActivity.onLoadNativeLibraries(Cocos2dxActivity.java:248)
at org.cocos2dx.lib.Cocos2dxActivity.onCreate(Cocos2dxActivity.java:263)
at android.app.Activity.performCreate(Activity.java:5008)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
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:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
03-05 18:35:11.559 1435-1435/? I/Process: Sending signal. PID: 1435 SIG: 9

App crashes when instantiating HelpStackSDK

We tried integrating HelpStack by following steps given on GitHub, but we kept getting the following errors:
04-03 13:54:22.054 4638-4638/com.playerline.android E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.playerline.android/com.tenmiles.helpstack.activities.HomeActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
at android.app.ActivityThread.access$600(ActivityThread.java:127)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4448)
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.NullPointerException
at com.tenmiles.helpstack.activities.HSActivityParent.onCreate(HSActivityParent.java:48)
at com.tenmiles.helpstack.activities.HomeActivity.onCreate(HomeActivity.java:46)
at android.app.Activity.performCreate(Activity.java:4465)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
at android.app.ActivityThread.access$600(ActivityThread.java:127)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4448)
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)
I'm guessing it has something to do with the App Theme, which in our case is is Theme.AppCompat.NoActionBar.

Selecting an item in ListFragment list programmatically

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));
}

Socket client program error

After the program running，click the send button，then pop-up dialog said the program has already exited。
I don‘t know what is the problem，how can I fix it？
Is there anybody has the same issue，can you help me？
package com.secion9.clienttest;
import android.os.Bundle;
import android.app.Activity;
import android.widget.*;
import java.net.Socket;
import java.io.IOException;
import java.io.OutputStream;
import android.view.View;
import android.view.View.OnClickListener;
public class ClientActivity extends Activity {
Button btSend;
EditText etMsg;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_client);
btSend=(Button)this.findViewById(R.id.button1);
etMsg=(EditText)this.findViewById(R.id.EditText1);
btSend.setOnClickListener(
new OnClickListener(){
public void onClick(View v)
{
try
{
Socket socket=new Socket("127.0.0.1",5050);
OutputStream outputStream=socket.getOutputStream();
byte[] buffer=etMsg.getText().toString().getBytes();
outputStream.write(buffer);
outputStream.flush();
}
catch(IOException e)
{
e.printStackTrace();
}
}
});
}
}
logcat
09-02 08:24:31.189: E/Trace(627): error opening trace file: No such file or directory (2)
09-02 08:24:32.259: D/gralloc_goldfish(627): Emulator without GPU emulation detected.
09-02 08:24:32.598: I/Choreographer(627): Skipped 40 frames! The application may be doing too much work on its main thread.
09-02 08:25:04.471: D/AndroidRuntime(627): Shutting down VM
09-02 08:25:04.471: W/dalvikvm(627): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
09-02 08:25:04.539: E/AndroidRuntime(627): FATAL EXCEPTION: main
09-02 08:25:04.539: E/AndroidRuntime(627): android.os.NetworkOnMainThreadException
09-02 08:25:04.539: E/AndroidRuntime(627): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
09-02 08:25:04.539: E/AndroidRuntime(627): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
09-02 08:25:04.539: E/AndroidRuntime(627): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
09-02 08:25:04.539: E/AndroidRuntime(627): at libcore.io.IoBridge.connect(IoBridge.java:112)
09-02 08:25:04.539: E/AndroidRuntime(627): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
09-02 08:25:04.539: E/AndroidRuntime(627): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
09-02 08:25:04.539: E/AndroidRuntime(627): at java.net.Socket.startupSocket(Socket.java:566)
09-02 08:25:04.539: E/AndroidRuntime(627): at java.net.Socket.tryAllAddresses(Socket.java:127)
09-02 08:25:04.539: E/AndroidRuntime(627): at java.net.Socket.<init>(Socket.java:177)
09-02 08:25:04.539: E/AndroidRuntime(627): at java.net.Socket.<init>(Socket.java:149)
09-02 08:25:04.539: E/AndroidRuntime(627): at com.secion9.clienttest.ClientActivity$1.onClick(ClientActivity.java:31)
09-02 08:25:04.539: E/AndroidRuntime(627): at android.view.View.performClick(View.java:4084)
09-02 08:25:04.539: E/AndroidRuntime(627): at android.view.View$PerformClick.run(View.java:16966)
09-02 08:25:04.539: E/AndroidRuntime(627): at android.os.Handler.handleCallback(Handler.java:615)
09-02 08:25:04.539: E/AndroidRuntime(627): at android.os.Handler.dispatchMessage(Handler.java:92)
09-02 08:25:04.539: E/AndroidRuntime(627): at android.os.Looper.loop(Looper.java:137)
09-02 08:25:04.539: E/AndroidRuntime(627): at android.app.ActivityThread.main(ActivityThread.java:4745)
09-02 08:25:04.539: E/AndroidRuntime(627): at java.lang.reflect.Method.invokeNative(Native Method)
09-02 08:25:04.539: E/AndroidRuntime(627): at java.lang.reflect.Method.invoke(Method.java:511)
09-02 08:25:04.539: E/AndroidRuntime(627): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
09-02 08:25:04.539: E/AndroidRuntime(627): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-02 08:25:04.539: E/AndroidRuntime(627): at dalvik.system.NativeStart.main(Native Method)
09-02 08:25:07.079: I/Process(627): Sending signal. PID: 627 SIG: 9

It sounds like you're doing networking on the main thread. That's a no-no:
http://developer.android.com/reference/android/os/NetworkOnMainThreadException.html
SOLUTION:
Modify your app so that it spawns off a thread or async task to do the network I/O.
Here's a good link that discusses how:
http://www.vogella.com/articles/AndroidPerformance/article.html

Have put in AndroidManifest.xml Internet permission?
Regards,

Skipped 40 frames! The application may be doing too much work on its main thread.
and
NetworkOnMainThreadException
Are there to tell you that you're blocking the main thread, which causes and ANR and the app can get killed :)
Try to implement your network stuff on a background thread, or with an AsyncTask

According to the documentation at [Android Developers][1]:
The exception that is thrown when an application attempts to perform a
networking operation on its main thread.
This is only thrown for applications targeting the Honeycomb SDK or
higher. Applications targeting earlier SDK versions are allowed to do
networking on their main event loop threads, but it's heavily
discouraged.
So you need to target a lower SDK or make a new thread for handling networks connections.

bluetoothchat application showing errors

I am trying to run a sample bluetooth chat application onto my smartphone (running Android 2.3). The target build project in Eclipse uses Android API level 10
the same project includes this in the manifest:
<uses-sdk minSdkVersion="6" android:targetSdkVersion="10" />
How do I get around this problem? Any Idea
These are my console errors
2012-05-09 12:30:09 - BluetoothChat] Android Launch!
[2012-05-09 12:30:09 - BluetoothChat] adb is running normally.
[2012-05-09 12:30:09 - BluetoothChat] Performing com.example.android.BluetoothChat.BluetoothChat activity launch
[2012-05-09 12:30:09 - BluetoothChat] Automatic Target Mode: Several compatible targets. Please select a target device.
[2012-05-09 12:30:13 - BluetoothChat] WARNING: Application does not specify an API level requirement!
[2012-05-09 12:30:13 - BluetoothChat] Device API version is 10 (Android 2.3.3)
[2012-05-09 12:30:13 - BluetoothChat] Uploading BluetoothChat.apk onto device 'emulator-5556'
[2012-05-09 12:30:14 - BluetoothChat] Installing BluetoothChat.apk...
[2012-05-09 12:30:21 - BluetoothChat] Success!
[2012-05-09 12:30:21 - BluetoothChat] Starting activity com.example.android.BluetoothChat.BluetoothChat on device emulator-5556
[2012-05-09 12:30:23 - BluetoothChat] ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.example.android.BluetoothChat/.BluetoothChat }
And logcat showing these errors
05-09 06:53:04.284: W/dalvikvm(435): threadid=1: thread exiting with uncaught exception (group=0x40015560)
05-09 06:53:04.524: E/AndroidRuntime(435): FATAL EXCEPTION: main
05-09 06:53:04.524: E/AndroidRuntime(435): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.android.BluetoothChat/com.example.android.BluetoothChat.BluetoothChat}: java.lang.ClassNotFoundException: com.example.android.BluetoothChat.BluetoothChat in loader dalvik.system.PathClassLoader[/data/app/com.example.android.BluetoothChat-2.apk]
05-09 06:53:04.524: E/AndroidRuntime(435): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
05-09 06:53:04.524: E/AndroidRuntime(435): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
05-09 06:53:04.524: E/AndroidRuntime(435): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-09 06:53:04.524: E/AndroidRuntime(435): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
05-09 06:53:04.524: E/AndroidRuntime(435): at android.os.Handler.dispatchMessage(Handler.java:99)
05-09 06:53:04.524: E/AndroidRuntime(435): at android.os.Looper.loop(Looper.java:123)
05-09 06:53:04.524: E/AndroidRuntime(435): at android.app.ActivityThread.main(ActivityThread.java:3683)
05-09 06:53:04.524: E/AndroidRuntime(435): at java.lang.reflect.Method.invokeNative(Native Method)
05-09 06:53:04.524: E/AndroidRuntime(435): at java.lang.reflect.Method.invoke(Method.java:507)
05-09 06:53:04.524: E/AndroidRuntime(435): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
05-09 06:53:04.524: E/AndroidRuntime(435): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
05-09 06:53:04.524: E/AndroidRuntime(435): at dalvik.system.NativeStart.main(Native Method)
05-09 06:53:04.524: E/AndroidRuntime(435): Caused by: java.lang.ClassNotFoundException: com.example.android.BluetoothChat.BluetoothChat in loader dalvik.system.PathClassLoader[/data/app/com.example.android.BluetoothChat-2.apk]
05-09 06:53:04.524: E/AndroidRuntime(435): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
05-09 06:53:04.524: E/AndroidRuntime(435): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
05-09 06:53:04.524: E/AndroidRuntime(435): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
05-09 06:53:04.524: E/AndroidRuntime(435): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
05-09 06:53:04.524: E/AndroidRuntime(435): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)
05-09 06:53:04.524: E/AndroidRuntime(435): ... 11 more
05-09 06:57:27.854: I/Process(435): Sending signal. PID: 435 SIG: 9

Check your classpath and project.properties file of your Eclipse project, I thought it was not set properly.
Try this way, using information of these files from a normal project that you have created before. Maybe it could help.