android - Cannot find method onClick in the Activity even though it is there -
i have made button:
<button android:id="@+id/btn_dialog" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/showdig" android:onclick="onclick" /> and onclick method in main activity
public void onclick(view v){ log.d("click test", "log"); this.showdialog(0); } but when click button get:
03-12 16:37:24.995: e/androidruntime(755): fatal exception: main 03-12 16:37:24.995: e/androidruntime(755): java.lang.illegalstateexception: not find method onclick(view) in activity class com.example.telefon.mainactivity onclick handler on view class android.widget.button id 'btn_dialog' 03-12 16:37:24.995: e/androidruntime(755): @ android.view.view$1.onclick(view.java:2670) 03-12 16:37:24.995: e/androidruntime(755): @ android.view.view.performclick(view.java:3110) 03-12 16:37:24.995: e/androidruntime(755): @ android.view.view$performclick.run(view.java:11934) 03-12 16:37:24.995: e/androidruntime(755): @ android.os.handler.handlecallback(handler.java:587) 03-12 16:37:24.995: e/androidruntime(755): @ android.os.handler.dispatchmessage(handler.java:92) 03-12 16:37:24.995: e/androidruntime(755): @ android.os.looper.loop(looper.java:132) 03-12 16:37:24.995: e/androidruntime(755): @ android.app.activitythread.main(activitythread.java:4123) 03-12 16:37:24.995: e/androidruntime(755): @ java.lang.reflect.method.invokenative(native method) 03-12 16:37:24.995: e/androidruntime(755): @ java.lang.reflect.method.invoke(method.java:491) 03-12 16:37:24.995: e/androidruntime(755): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:841) 03-12 16:37:24.995: e/androidruntime(755): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:599) 03-12 16:37:24.995: e/androidruntime(755): @ dalvik.system.nativestart.main(native method) 03-12 16:37:24.995: e/androidruntime(755): caused by: java.lang.nosuchmethodexception: onclick [class android.view.view] 03-12 16:37:24.995: e/androidruntime(755): @ java.lang.classmembers.getconstructorormethod(classmembers.java:235) the whole xml , .java
package com.example.telefon; import android.os.bundle; import android.app.activity; import android.util.log; import android.view.menu; import android.view.view; public class mainactivity extends activity { @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); string s; } @override public boolean oncreateoptionsmenu(menu menu) { // inflate menu; adds items action bar if present. getmenuinflater().inflate(r.menu.main, menu); return true; } public void onclick(view v){ log.d("click test", "log"); this.showdialog(0); } } <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:paddingbottom="@dimen/activity_vertical_margin" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" tools:context=".mainactivity" > <textview android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello_world" /> <button android:id="@+id/btn_dialog" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/showdig" android:onclick="onclick" /> </relativelayout>
problem onclick property. change property from
android:onclick="onclick" to
android:onclick="onclick" don't forget, it's case-sensitive if method's signature onclick won't match onclick.
public void onclick(view v){ log.d("click test", "log"); this.showdialog(0); } now should works.
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