我和我的对话片段的一个问题。我想用机器人:onclick属性在我看来code更清楚再
I have a problem with my Dialog Fragment. I wanted to use android:onClick attribute as in my opinion code is more clear then.
在我的布局,我有以下声明:
In my layout I have the following declaration:
<Button
android:id="@+id/dialog_new_database_button_cancel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/button_cancel"
android:maxLines="1"
style="?android:attr/buttonBarButtonStyle"
android:onClick="buttonCancel"
/>
现在我DialogFragment
Now my DialogFragment
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class DialogNewDatabase extends DialogFragment {
public DialogNewDatabase() {
// Empty constructor required for DialogFragment
super();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView (inflater, container, savedInstanceState);
View view = inflater.inflate(R.layout.dialog_new_database, container);
getDialog().setTitle("Hello");
return view;
}
@Override
public void onCreate(Bundle bundle) {
setCancelable(true);
setRetainInstance(true);
super.onCreate(bundle);
}
@Override
public void onDestroyView() {
if (getDialog() != null && getRetainInstance())
getDialog().setDismissMessage(null);
super.onDestroyView();
}
public void buttonCancel (View view) {
dismiss();
}
public void buttonOK (View view) {
}
}
我现在当我尝试点击取消按钮,我得到的:
I now when I try to click cancel button I get:
java.lang.IllegalStateException: Could not find a method buttonCancel(View) in the activity class android.view.ContextThemeWrapper for onClick handler on view class android.widget.Button with id 'dialog_new_database_button_cancel'
at android.view.View$1.onClick(View.java:3031)
at android.view.View.performClick(View.java:3511)
at android.view.View$PerformClick.run(View.java:14105)
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:4482)
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:787)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NoSuchMethodException: buttonCancel [class android.view.View]
at java.lang.Class.getConstructorOrMethod(Class.java:460)
at java.lang.Class.getMethod(Class.java:915)
at android.view.View$1.onClick(View.java:3024)
... 11 more
你知道吗?是,也许是某种联系与我用的是进口android.support.v4.app.DialogFragment(支持V4)的事实?如何解决(我仍然会preFER使用安卓的onClick在XML布局)。
Any idea? Is that perhaps somehow related with the fact I use import android.support.v4.app.DialogFragment (support v4)? How to solve that (I still would prefer to use android:onClick in xml layout).
我会尝试不同的方法,它为我工作得很好:
I would try a different approach which works fine for me:
实施OnClickListener到您的片段:
implement an OnClickListener into your fragment:
public class DialogNewDatabase extends DialogFragment implements OnClickListener`
有一个唯一的ID在XML中,一个按钮,做不会需要机器人:可点击
<Button android:id="@+id/dialog_new_database_button_cancel" />
覆盖的方法的onClick()
的片段中,并插入你的点击反应:
override the method onClick()
within your fragment and insert a reaction on your click:
public void onClick(View v) {
switch (v.getId()) {
case R.id.dialog_new_database_button_cancel:
// your stuff here
this.dismiss();
break;
default:
break;
}
}
导入必要的:
import the necessary:
import android.view.View.OnClickListener;
开始onClickListener按钮:
start the onClickListener on the button:
private Button bCancel = null;
bCancel = (Button) findViewById(R.id.dialog_new_database_button_cancel);
bCancel.setOnClickListener(this);
// it is possible that you might need the refrence to the view.
// replace 2nd line with (Button) getView().findViewById(...);
此方式,您可以处理在相同的onClick法更可点击的按钮。你只需要你点击小工具的正确的ID添加更多的情况。
This way you can handle even more clickable buttons in the same onClick-method. You just need to add more cases with the proper ids of your clickable widgets.