嗨，我是Android编程的新手，我无法弄清楚我的错误。自从我昨天点击Play我的activity_thesis.xml之后把它放进去之后我已经尝试了这个，但是在menu.xml中它在logcat上显示了这个错误，它显示了一个消息框，上面写着“应用程序Droid （process.com.sample.droid）意外停止了。请再试一次。“这是我的代码
Menu.java
public class Menu extends Activity
{
Button beginner, learner;
@Override
protected void onCreate(Bundle MenuButtons)
{
requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(MenuButtons);
setContentView(R.layout.menu);
beginner = (Button) findViewById(R.id.btnBeginner);
learner = (Button) findViewById(R.id.btnLearner);
beginner.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View arg0)
{
// TODO Auto-generated method stub
setContentView(R.layout.beginner);
}
});
learner.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View arg0)
{
// TODO Auto-generated method stub
setContentView(R.layout.gameplay);
}
});
}
}
menu.xml文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/categories" >
<ScrollView android:layout_width="match_parent" android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<Button
android:id="@+id/btnLearner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/btnBeginner"
android:layout_centerHorizontal="true"
android:background="@drawable/learner_menu"
android:onClick="onClick" />
<Button
android:id="@+id/btnBeginner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:background="@drawable/beginner_menu"
android:onClick="onClick" />
</RelativeLayout>
</ScrollView>
</LinearLayout>
的AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.thesis.logipic"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".Splash"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".ThesisActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="com.thesis.logipic.THESISACTIVITY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".Menu"
android:label="@string/app_name" >
<intent-filter>
<action android:name="com.thesis.logipic.MENU" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".Gameplay"
android:label="@string/app_name" >
<intent-filter>
<action android:name="com.thesis.logipic.GAMEPLAY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".Beginner"
android:label="@string/app_name" >
<intent-filter>
<action android:name="com.thesis.logipic.BEGINNER" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
和 Logcat
10-06 15:40:19.995: D/AndroidRuntime(342): Shutting down VM
10-06 15:40:19.995: W/dalvikvm(342): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
10-06 15:40:20.014: E/AndroidRuntime(342): FATAL EXCEPTION: main
10-06 15:40:20.014: E/AndroidRuntime(342): java.lang.IllegalStateException: Could not find a method onClick(View) in the activity class com.thesis.logipic.ThesisActivity for onClick handler on view class android.widget.Button with id 'btnBeginner'
10-06 15:40:20.014: E/AndroidRuntime(342): at android.view.View$1.onClick(View.java:2059)
10-06 15:40:20.014: E/AndroidRuntime(342): at android.view.View.performClick(View.java:2408)
10-06 15:40:20.014: E/AndroidRuntime(342): at android.view.View$PerformClick.run(View.java:8816)
10-06 15:40:20.014: E/AndroidRuntime(342): at android.os.Handler.handleCallback(Handler.java:587)
10-06 15:40:20.014: E/AndroidRuntime(342): at android.os.Handler.dispatchMessage(Handler.java:92)
10-06 15:40:20.014: E/AndroidRuntime(342): at android.os.Looper.loop(Looper.java:123)
10-06 15:40:20.014: E/AndroidRuntime(342): at android.app.ActivityThread.main(ActivityThread.java:4627)
10-06 15:40:20.014: E/AndroidRuntime(342): at java.lang.reflect.Method.invokeNative(Native Method)
10-06 15:40:20.014: E/AndroidRuntime(342): at java.lang.reflect.Method.invoke(Method.java:521)
10-06 15:40:20.014: E/AndroidRuntime(342): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-06 15:40:20.014: E/AndroidRuntime(342): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-06 15:40:20.014: E/AndroidRuntime(342): at dalvik.system.NativeStart.main(Native Method)
10-06 15:40:20.014: E/AndroidRuntime(342): Caused by: java.lang.NoSuchMethodException: onClick
10-06 15:40:20.014: E/AndroidRuntime(342): at java.lang.ClassCache.findMethodByName(ClassCache.java:308)
10-06 15:40:20.014: E/AndroidRuntime(342): at java.lang.Class.getMethod(Class.java:985)
10-06 15:40:20.014: E/AndroidRuntime(342): at android.view.View$1.onClick(View.java:2052)
10-06 15:40:20.014: E/AndroidRuntime(342): ... 11 more
答案 0 :(得分：1)
从 Menu.xml
中删除此行代码 android:onClick="onClick"
你做错了是你已经创建了Button的对象并且有setOnclicklistener，这样你就创建了一个监听器两次。要么添加
public void onClick(View v){
}
并使用
使用它android:onClick="onClick"
或使用您正在使用的那个。但只能使用一种方法来处理点击监听器。