Develop Reference

Application not working on Android Kitkat

I'm creating my own application. I tested it on Android Lollipop and Marshmallow - everything works great. But whenever I try Android Kitkat, an error occurs. Here's error log:
E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.newproject/com.example.newproject.Progi}: java.lang.ClassCastException: java.lang.Object[] cannot be cast to java.math.BigDecimal[][]
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
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)
Caused by: java.lang.ClassCastException: java.lang.Object[] cannot be cast to java.math.BigDecimal[][]
at com.example.newproject.Progi.onCreate(Progi.java:62)
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) 
It looks like problem is on line 62 in "progi" class, but - as for me - everything is OK especially that on newer Android versions it works great.
public class Progi extends AppCompatActivity {
Intent intent;
Bundle liczby;
Bundle doble;
BigDecimal tablica [][];
BigDecimal punkty = new BigDecimal(-1);
#Override
public boolean onPrepareOptionsMenu(Menu menu)
{
android.content.SharedPreferences shared = android.preference.PreferenceManager.getDefaultSharedPreferences(this);
boolean warunek = shared.getBoolean("serial", false);
android.view.MenuItem menuitem = menu.getItem(0);
if(warunek)
{
menuitem.setTitle("Oceny pojedynczo");
}
else menuitem.setTitle("Oceny seryjnie");
return true;
}
public boolean onCreateOptionsMenu(Menu menu) {
android.view.MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.firstmenu, menu);
return true;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layoutprogi);
Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(myToolbar);
getSupportActionBar().setTitle("Progi punktowe");
intent = getIntent();
liczby = intent.getBundleExtra("liczby");
doble = intent.getBundleExtra("doble");
tablica = (BigDecimal[][]) doble.getSerializable("doble"); //here is line 62
if(intent.hasExtra("max")) {
Bundle a = intent.getBundleExtra("max");
punkty = (BigDecimal) a.getSerializable("max");
}
przejscie(true);
if(punkty.compareTo(new BigDecimal(-3))==0)
{
procenty(findViewById(android.R.id.content));
}
else if(punkty.compareTo(new BigDecimal(-1))!=0)
{
liczymy(findViewById(android.R.id.content));
}}
And in case someone asking "what 'tablica' gets from intent?":
BigDecimal[][] tablica = new BigDecimal[16][3];
//here i get data from file and put in inside "tablica"
Bundle doble = new Bundle();
doble.putSerializable("doble", tablica);
Intent intent = new Intent(Starter.this, MyActivity.class);
intent.putExtra("doble", doble);
startActivity(intent);
Any idea what's wrong?

Try switching your array implementation (BigDecimal[] []) to ArrayList.
If you want to pass an Array through an intent on Android versions
prior to Android 5.0.1 (maybe some older versions work aswell, but up
to Android 4.3 it is NOT working) You'll have to work around it. You
could do this by converting your Array to an ArrayList.
Then you would be casting it something like this:
(ArrayList<ArrayList<BigDecimal>>) doble.getSerializable("doble");
Related SO answer

NoClassDefFoundError Exception when launching app in GenyMotion emulator

I wanted to test my code on another device than my physical one, so I launched the app in GenyMotion emulator with a Samsung Galaxy S3 (API 18), but it keeps throwing a NoClassDefFoundError Exception in my class "SlidingMenuUtil" (a customized drawer menu) which is called on startup by my MainActivity.
Here is code from my onCreate in MainActivity:
#Bind(R.id.viewContentFullScreen) RelativeLayout viewContentFullScreen;
#Bind(R.id.viewContentTopBar) RelativeLayout viewContentTopBar;
#Bind(R.id.topBarWrapper) RelativeLayout topbarView;
private ViewContainer viewContainer;
private SlidingMenuUtil leftMenu;
private Bundle bundle;
private MessageHandler messageHandler;
private GoBackFunction currentGoBackFunction;
private CallbackManager callbackManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
bundle = savedInstanceState;
setContentView(R.layout.activity_main);
leftMenu = new SlidingMenuUtil(this, SlidingMenuUtil.MenuType.LEFT, R.layout.drawer_menu, (int)(LayoutUtil.getScreenWidth(this) * 0.75), false);
populateMenu();
ButterKnife.bind(this);
messageHandler = new MessageHandler(this, findViewById(R.id.spinner));
FacebookSdk.sdkInitialize(getApplicationContext());
callbackManager = CallbackManager.Factory.create();
}
The problem occurs in the SlidingMenuUtil class on line: 67. Here is the constructor for the class:
public SlidingMenuUtil(Activity activity, MenuType menuType, int menuLayout, int shownMenuWidth, boolean fadeEffectOn) {
this.activity = activity;
this.menuType = menuType;
this.shownMenuWidth = shownMenuWidth;
this.fadeEffectOn = fadeEffectOn;
this.screenWidth = LayoutUtil.getScreenWidth(activity);
this.rootView = (ViewGroup)((ViewGroup)activity.findViewById(android.R.id.content)).getChildAt(0);
this.activityWrapper = new RelativeLayout(activity);
this.activityWrapper.setLayoutParams(this.rootView.getLayoutParams());
this.overlay = new RelativeLayout(activity);
this.overlay.setLayoutParams(new ViewGroup.LayoutParams(-1, -1));
this.overlay.setBackgroundColor(Color.parseColor("#000000"));
this.overlay.setAlpha(0.0F);
this.overlay.setVisibility(View.GONE);
this.overlay.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (menuOpen) {
toggle(new ToggleMenu() {
#Override
public void animationDone() {
}
});
}
}
});
this.rootView.addView(this.overlay);
this.menu = (LinearLayout)activity.getLayoutInflater().inflate(menuLayout, (ViewGroup) null, false);
this.menu.setLayoutParams(new ViewGroup.LayoutParams(shownMenuWidth, -1));
if (menuType == MenuType.LEFT) {
this.menu.setTranslationX((float)(-shownMenuWidth));
} else {
this.menu.setTranslationX((float)(screenWidth));
}
this.rootView.addView(this.menu);
this.menuOpen = false;
}
lin 67 is:
this.overlay.setOnClickListener(new View.OnClickListener() {
As mentioned before the problem only occurs in the emulator.
Here is the log:
812-812/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NoClassDefFoundError: nightout.dk.nightoutandroid.utils.SlidingMenuUtil$1
at nightout.dk.nightoutandroid.utils.SlidingMenuUtil.<init>(SlidingMenuUtil.java:67)
at nightout.dk.nightoutandroid.MainActivity.onCreate(MainActivity.java:40)
at android.app.Activity.performCreate(Activity.java:5133)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
I hope somone can help me out.
Any help will be gratly appreciated

Android CursorAdapter giving java.lang.NullPointerException error

I am having a few issues running my custom CursorAdapter in my application. According to my logcat, the error I get:
11-08 06:41:03.228 6109-6109/? W/System.err? java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.name/com.app.name.MyActivity}: java.lang.NullPointerException
11-08 06:41:03.229 6109-6109/? W/System.err? at com.app.name.MyActivity.onCreate(MyActivity.java:71)
11-08 06:41:03.231 6109-6109/? E/AndroidRuntime? FATAL EXCEPTION: main
occurs at line 71 which sets the adapter (obj.setAdapter(myAdapter)). Initially I thought my database data retrieve function (Cursor chatCursor = mydb.selectConversation(msgId);) did not return any data but after testing it with the chatCursor.getCount() function, I realized that was not the case. Kindly assist me in solving this issue. Below are the codes for my activity, adapter and logcat. Thanks in advance.
MyAdapter.java
public class MyAdapter extends CursorAdapter {
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
public MyAdapter(Context context, Cursor cursor) {
super(context, cursor, 0);
}
#Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return LayoutInflater.from(context).inflate(R.layout.chat_left, parent, false);
}
#Override
public void bindView(View view, Context context, Cursor cursor) {
TextView user = (TextView) view.findViewById(R.id.reply_user);
TextView msg = (TextView) view.findViewById(R.id.reply_msg);
String theTime = cursor.getString(cursor.getColumnIndexOrThrow("message_id"));
String theMessage = cursor.getString(cursor.getColumnIndexOrThrow("message"));
user.setText(theTime);
msg.setText(String.valueOf(theMessage));
}
}
MyActivity.java
public class MyActivity extends ListActivity {
//Utils Class
Utils util;
final Context context = this;
private ProgressBar dialog;
ListView obj;
DBHelper mydb;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view);
util = new Utils(this);
mydb = new DBHelper(this);
Bundle extras = getIntent().getExtras();
final Integer msgId = extras.getInt("id");
obj = (ListView) findViewById(R.id.list);
Cursor chatCursor = mydb.selectConversation(msgId);
MyAdapter myAdapter = new MyAdapter(this, chatCursor);
obj.setAdapter(myAdapter);
}
}
logcat
11-08 06:41:03.228 6109-6109/? W/System.err? java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.name/com.app.name.MyActivity}: java.lang.NullPointerException
11-08 06:41:03.229 6109-6109/? W/System.err? at com.app.name.MyActivity.onCreate(MyActivity.java:71)
11-08 06:41:03.231 6109-6109/? E/AndroidRuntime? FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.name/com.app.name.MyActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2351)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
at android.app.ActivityThread.access$600(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5370)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.app.name.MyActivity.onCreate(MyActivity.java:71)
at android.app.Activity.performCreate(Activity.java:5122)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1150)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2315)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
at android.app.ActivityThread.access$600(ActivityThread.java:165)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5370)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
at dalvik.system.NativeStart.main(Native Method)
11-08 06:41:03.238 559-832/? W/ActivityManager? Force finishing activity com.app.name/.MyActivity
11-08 06:41:03.742 559-574/? W/ActivityManager? Activity pause timeout for ActivityRecord{42e71938 u0 com.app.name/.MyActivity}

Take a look to your activity_view.xml. Probably the listview ID isn't "list" as you state when you try to find it with findViewById(R.layout.list).

Setting OnClickListener throws an exception?

I want to know why my application is throwing a runtime exception when I run it? I used to the code in the following link for my application,
dynamically add and remove view to viewpager.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActionBar ab=getActionBar();
pagerAdapter = new MainPagerAdapter();
pager = (ViewPager) findViewById (R.id.pager);
pager.setAdapter (pagerAdapter);
inflater = (LayoutInflater)getSystemService
(Context.LAYOUT_INFLATER_SERVICE);
v0 = (FrameLayout) inflater.inflate (R.layout.listlayout, null);
Button button=(Button)findViewById(R.id.button1);
button.setOnClickListener(this);
pagerAdapter.addView (v0, 0);
pagerAdapter.notifyDataSetChanged();
}
#Override
public void onClick(View v) {
if(v.getId()==R.id.button1)
{
pagerAdapter.addView (v0);
pagerAdapter.notifyDataSetChanged();
}
}
LogCat:
FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.todolistworkable/com.example.todolistworkable.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1970)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1995)
at android.app.ActivityThread.access$600(ActivityThread.java:128)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4514)
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:790)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
at dalvik.system.NativeStart.main(Native Method)Caused by: java.lang.NullPointerException
at com.example.todolistworkable.MainActivity.onCreate(MainActivity.java:43)
at android.app.Activity.performCreate(Activity.java:4465)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1053)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1934)

the object on line 43 of your code within your onCreate method is null. Most likely the target of one of your findViewById calls is not returning what you expect it to.
See this for more info.
How to interpret Logcat

Start activity from service isn't working (Android)

I created an overlay "always on top button", which is a service HUD, and I can't start an activity screen from there, it gives the error: "Unfortunately App has stopped". In the beginning, all I used to know if there was any TouchEventwas a toast, and that toast was created, but it was created several times, so I don't know if it gives that error because this code, which is on TouchEvent body , is repeated several times too.
here is my code:
public class HUD extends Service implements OnClickListener, OnTouchListener, OnLongClickListener {
Button mButton;
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
//mView = new HUDView(this);
mButton = new Button(this);
mButton.setId(1);
mButton.setText("Button");
mButton.setClickable(true);
mButton.setOnTouchListener(this);
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.TYPE_PHONE,
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
PixelFormat.OPAQUE);
params.gravity = Gravity.LEFT | Gravity.TOP;
params.setTitle("Load Average");
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
wm.addView(mButton, params);
}
#Override
public void onDestroy() {
super.onDestroy();
if(mButton != null)
{
((WindowManager) getSystemService(WINDOW_SERVICE)).removeView(mButton);
mButton = null;
}
}
#Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getX()<mButton.getWidth() & event.getY()>0)
{
Toast.makeText(this,"Overlay button event", Toast.LENGTH_SHORT).show(); //this my toast
Intent i = new Intent(); //this is my new acivity (intent)
i.setClass(HUD.this, screen.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
HUD.this.stopSelf();
}
return false;
}
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(this,"Click", Toast.LENGTH_SHORT).show();
}
#Override
public boolean onLongClick(View v) {
// TODO Auto-generated method stub
System.exit(1);
return false;
}
}
So my question is, is this code on TouchEvent body being repeated several times? If it is, is that the cause of the error?
log cat:
07-20 22:11:06.962: I/Choreographer(1620): Skipped 52 frames! The application may be doing too much work on its main thread.
07-20 22:11:08.062: D/AndroidRuntime(1620): Shutting down VM
07-20 22:11:08.062: W/dalvikvm(1620): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
07-20 22:11:08.132: E/AndroidRuntime(1620): FATAL EXCEPTION: main
07-20 22:11:08.132: E/AndroidRuntime(1620): android.app.SuperNotCalledException: Activity {com.example.screenshot/com.example.screenshot.screen} did not call through to super.onCreate()
07-20 22:11:08.132: E/AndroidRuntime(1620): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2146)
07-20 22:11:08.132: E/AndroidRuntime(1620): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
07-20 22:11:08.132: E/AndroidRuntime(1620): at android.app.ActivityThread.access$600(ActivityThread.java:141)
07-20 22:11:08.132: E/AndroidRuntime(1620): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
07-20 22:11:08.132: E/AndroidRuntime(1620): at android.os.Handler.dispatchMessage(Handler.java:99)
07-20 22:11:08.132: E/AndroidRuntime(1620): at android.os.Looper.loop(Looper.java:137)
07-20 22:11:08.132: E/AndroidRuntime(1620): at android.app.ActivityThread.main(ActivityThread.java:5041)
07-20 22:11:08.132: E/AndroidRuntime(1620): at java.lang.reflect.Method.invokeNative(Native Method)
07-20 22:11:08.132: E/AndroidRuntime(1620): at java.lang.reflect.Method.invoke(Method.java:511)
07-20 22:11:08.132: E/AndroidRuntime(1620): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-20 22:11:08.132: E/AndroidRuntime(1620): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
07-20 22:11:08.132: E/AndroidRuntime(1620): at dalvik.system.NativeStart.main(Native Method)
screen.java:
public class screen extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
Toast.makeText(getApplicationContext(), "Made it", 0).show();
finish();
}
}

See android start activity from service
Intent i= new Intent(getBaseContext(), screen.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
getApplication().startActivity(i);
You error seems to be inside screen activity. There are many thread which might help to figure out the error that you are getting for the activity:
Error in Android "SuperNotCalledException:Activity did not call through to super.OnCreate()"
android.app.SuperNotCalledException: Activity did not call through to super.onStop()
Update
The error is because you haven't called: super.onCreate(savedInstanceState); in your screen activity's onCreate(). That should be the first thing to be called in onCreate(). Do something like this:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//.... other stuff
}
Hope this helps.