我在Android API 15的简单视图中遇到了一个奇怪的问题。在这个视图中，我有一个包含2个菜单项的简单菜单。 此代码适用于其他Android API，但不适用于Android 4.0.3手机：
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="@+id/root_menu"
android:icon="@android:drawable/ic_menu_help"
android:showAsAction="always"
android:title="Help">
<menu>
<item
android:id="@+id/menu_about"
android:onClick="aboutDialog"
android:showAsAction="never"
android:title="About"/>
</menu>
</item>
</menu>
这是活动
public class HomeActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
}
/**
* Crea l'action bar
*
* @param menu
* @return
*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_actionbar, menu);
return true;
}
/**
* Apertura del dialog box con le informazioni sulla versione del programma
*
* @param v
*/
public void aboutDialog(MenuItem v) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Test")
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// FIRE ZE MISSILES!
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// User cancelled the dialog
}
});
// Create the AlertDialog object and return it
builder.create().show();
}
}
这段代码没什么奇怪的。但是当我尝试在设备上运行时，我有这个例外：
android.view.InflateException: Couldn't resolve menu item onClick handler
aboutDialog in class android.view.ContextThemeWrapper
at android.view.MenuInflater$InflatedOnMenuItemClickListener.<init> (MenuInflater.java:202)
at android.view.MenuInflater$MenuState.setItem(MenuInflater.java:402)
at android.view.MenuInflater$MenuState.addItem(MenuInflater.java:436)
at android.view.MenuInflater.parseMenu(MenuInflater.java:173)
at android.view.MenuInflater.parseMenu(MenuInflater.java:151)
at android.view.MenuInflater.inflate(MenuInflater.java:95)
at
it.mobile.activity.home.HomeActivity.onCreateOptionsMenu(HomeActivity.java:38)
at android.app.Activity.onCreatePanelMenu(Activity.java:2444)
at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:388)
at com.android.internal.policy.impl.PhoneWindow.invalidatePanelMenu(PhoneWindow.java:739)
at com.android.internal.policy.impl.PhoneWindow$1.run(PhoneWindow.java:2833)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$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.NoSuchMethodException: aboutDialog
[interface android.view.MenuItem]
at java.lang.Class.getConstructorOrMethod(Class.java:460)
at java.lang.Class.getMethod(Class.java:915)
at android.view.MenuInflater$InflatedOnMenuItemClickListener.<init>
但我不明白问题出在哪里。使用另一台设备一切正常！
答案 0 :(得分：3)
不确定如何用xml解决它。
从代码角度来看，您必须实现
public boolean onOptionsItemSelected(MenuItem item)
然后根据菜单项调用所需的处理程序。
答案 1 :(得分：3)
虽然这已经过时了，但这是例外的原因。当您在类MenuInflator中查看android API 15（4.0.3-4.0.4）的源代码时，您将看到此方法：
public InflatedOnMenuItemClickListener(Context context, String methodName) {
mContext = context;
Class<?> c = context.getClass();
try {
mMethod = c.getMethod(methodName, PARAM_TYPES);
} catch (Exception e) {
InflateException ex = new InflateException(
"Couldn't resolve menu item onClick handler " + methodName +
" in class " + c.getName());
ex.initCause(e);
throw ex;
}
这是例外情况。正如我们所看到的，该方法试图在传递的上下文项的类上找到Callback方法。因此，不应在getMenuInflator()中调用onCreateOptionsMenu，而应调用new MenuInflator(this)，以便this作为上下文传递，然后代码就可以运行。
另一个错误修复是从清单中删除主题，我仍然非常困惑为什么这样做。但是，这只是一种解决方法。
答案 2 :(得分：0)
我遇到了类似的问题，我在这里找到了这个问题 - https://code.google.com/p/android/issues/detail?id=62795
This is affecting Android 5.0 when applying the android:theme attribute.
<Button
android:theme="@android:style/Theme.Material"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="onLoginEmail"
Clicking on the button throws
java.lang.IllegalStateException: Could not find a method onLoginEmail(View) in the activity class android.view.ContextThemeWrapper for onClick handler on view class android.widget.Button
at android.view.View$1.onClick(View.java:3994)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19749)
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:5221)
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:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NoSuchMethodException: onLoginEmail [class android.view.View]
at java.lang.Class.getMethod(Class.java:664)
at java.lang.Class.getMethod(Class.java:643)
at android.view.View$1.onClick(View.java:3987)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19749)
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:5221)
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:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
/>
我从android:theme
TextView，解决了这个问题