片段中未调用onClickListener

Question

In the following piece of code, even after registering an onClickLister, callback function is not getting called.

public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View view1 = inflater.inflate(R.layout.fragment_register,
            container, false);

    final Button button = 
            (Button) view1.findViewById(R.id.button1);

    button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            updateUser(v);
        }
    });

    return view1;
}

public void updateUser(View v) {
    Toast.makeText(getActivity(), "name", Toast.LENGTH_LONG).show();
}

and the fragment.xml file will be, Registering an onClick Listener in the xml also doesnt help, because it calls the function in the Activity.

<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="com.example.picturejumble.Register$PlaceholderFragment" >

<EditText
    android:id="@+id/editText1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="34dp"
    android:layout_marginTop="37dp"
    android:ems="10"
    android:inputType="textPersonName" >

    <requestFocus />
</EditText>

<EditText
    android:id="@+id/editText2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/editText1"
    android:layout_below="@+id/editText1"
    android:layout_marginTop="54dp"
    android:ems="10"
    android:inputType="textEmailAddress" />

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/editText2"
    android:layout_below="@+id/editText2"
    android:layout_marginLeft="50dp"
    android:layout_marginTop="60dp"
    android:text="Button" />

 </RelativeLayout>

Logcat doesn't report any errors, and the code doesn't crashes as well.

The problem is that the callback is not getting called.

Answer 1

Just call your updateUser(View v) method in your xml file for button onClick method instead of in programming.

Use this

android:onClick = "updateUser"

for your Button in xml file.

Answer 2

no need to pass the view parameter

button.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        updateUser();
    }
});
public void updateUser() {
Toast.makeText(getActivity(), "name", Toast.LENGTH_LONG).show();
}

Answer 3

use this line of code in onCreateView before inflating view super.onCreateView(inflater, container, savedInstanceState); if it still dosn't work please paste full code for fragment class

Answer 4

Please try below code and let me know:

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    button.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        updateUser(v);
    }
  });
}

Define this Button outside the onCreateView method