Java.lang.IllegalStateException: cannot find onClick button in Android Studio

Question

I am creating an application called Ping in Android Studio. So far, my actions are ProfileActivity ProfileActivity and Timeline. My problem is that the button in the layout corresponding to the timeline activity has an onClick method that does not work. When the button is pressed, the emulator displays "Unfortunatley, Ping has stopped." I define onClick buttons and methods in the same way as for other buttons whose functions work, only this one does not seem to work. I get a message stating that the method was not found, but I wrote the method in the corresponding action. Here is logcat:

04-30 10:40:08.727 2075-2075/com.ping_social.www.ping E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.ping_social.www.ping, PID: 2075 java.lang.IllegalStateException: Could not find a method onProfilePress(View) in the activity class android.view.ContextThemeWrapper for onClick handler on view class android.widget.Button with id 'profileButton' at android.view.View$1.onClick(View.java:4007) at android.view.View.performClick(View.java:4780) at android.view.View$PerformClick.run(View.java:19866) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5257) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) Caused by: java.lang.NoSuchMethodException: onProfilePress [class android.view.View] at java.lang.Class.getMethod(Class.java:664) at java.lang.Class.getMethod(Class.java:643) at android.view.View$1.onClick(View.java:4000)             at android.view.View.performClick(View.java:4780)             at android.view.View$PerformClick.run(View.java:19866)             at android.os.Handler.handleCallback(Handler.java:739)             at android.os.Handler.dispatchMessage(Handler.java:95)             at android.os.Looper.loop(Looper.java:135)             at android.app.ActivityThread.main(ActivityThread.java:5257)             at java.lang.reflect.Method.invoke(Native Method)             at java.lang.reflect.Method.invoke(Method.java:372)             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 

Here is my Timeline activity class:

 package com.ping_social.www.ping; import android.content.Intent; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; public class TimeLine extends ActionBarActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_time_line); /*print log that shows we've got here*/ Log.i("LoginActivity", "Layout has been set"); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_time_line, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } /*called when user presses the Log in button*/ public void onProfilePress(View view){ /*Log the button press*/ Log.i("TimeLine", "Has reached the onProfilePress method"); Intent intent = new Intent(this, ProfileActivity.class); startActivity(intent); } } 

And here is my timeline XML code:

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" android:theme="@style/GeneralTheme" tools:context="com.ping_social.www.ping.TimeLine"> <TextView android:text="@string/no_pings" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="30sp" android:layout_centerVertical="true" android:layout_centerHorizontal="true" android:textIsSelectable="false" android:textColor="@color/PING_TOP_BAR_RED" android:id="@+id/textView4" /> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="60dp" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/timeline_button" android:id="@+id/timelineButton" android:textColor="@color/PING_TOP_BAR_RED" android:layout_weight="1"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/new_ping_button" android:id="@+id/newPingButton" android:layout_weight="1"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/activity_button" android:id="@+id/activityButton" android:layout_weight="1"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/profile_button" android:id="@+id/profileButton" android:layout_weight="1" android:onClick="onProfilePress"/> </LinearLayout> </RelativeLayout> 

I am pretty sure that there are no problems with spelling, and there are no other buttons that have the same identifier or methods that have the same name. Stuck on this for several days, any help is much appreciated!

Answer 1

Ok, so I did my own test. I put together a basic relative layout with a single button, put android:theme="@style/AppTheme" , and the button application crashed with the same error. Then I removed the android:theme attribute - the onclick event is fired, as it should be.

All this happened when I used AppCompatActivity instead of now-derecated ActionBarActivity .

It's hard for me to say why this does not work with android:theme . This is one of the features of Lollipop, but I tried to run the API 5.0 emulator. The article states that this attribute is currently only supported for android.support.v7.widget.Toolbar .