Question

我有一个带有复选框的自定义对话框片段。 onClick方法在xml中被调用。
我收到以下错误：

java.lang.IllegalStateException：无法在ID为“ checkBox2”的视图类androidx.appcompat.widget.AppCompatCheckBox上定义的android：onClick属性的父级或祖先上下文中找到方法onCheckboxClicked（View）

我已经对相关问题进行了各种回答，但是由于视图在onCreateView中而不是在onCreate中被夸大，因此无法弄清楚如何在对话框片段中实现

DialogFragment.java

public class TypeDialogFragment extends DialogFragment {
CheckBox type1, type2;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_type_dialog, container, false);

    type1=(CheckBox) v.findViewById(R.id.checkBox2);
    type2=(CheckBox)v.findViewById(R.id.checkBox3) ;

    // Do all the stuff to initialize your custom view
    // set "origin" to top left corner, so to speak
    Window window = getDialog().getWindow();
    window.setGravity(Gravity.TOP|Gravity.LEFT);

    // after that, setting values for x and y works "naturally"
    WindowManager.LayoutParams params = window.getAttributes();
    params.x = 100;
    params.y = 250;
    window.setAttributes(params);

    //Log.d(TAG, String.format("Positioning DialogFragment to: x %d; y %d", params.x, params.y));

    return v;
}

@Override public void onStart() {
    super.onStart();

    Window window = getDialog().getWindow();
    WindowManager.LayoutParams windowParams = window.getAttributes();
    windowParams.dimAmount = 0.00f;
    windowParams.flags |= WindowManager.LayoutParams.FLAG_DIM_BEHIND;
    window.setAttributes(windowParams);
}

public void onCheckboxClicked(View view) {
    boolean checked = ((CheckBox) view).isChecked();
    String str="";
    // Check which checkbox was clicked
    switch(view.getId()) {
        case R.id.checkBox2:
            str = checked?"Android Selected":"Android Deselected";
            break;
        case R.id.checkBox3:
            str = checked?"AngularJS Selected":"AngularJS Deselected";
            break;

    }
    Toast.makeText(view.getContext(), str, Toast.LENGTH_SHORT).show();
}

}

fragment_type_dialog.xml

<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:card_view="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="4dp"
    app:cardElevation="2dp">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/constrainLayout1"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        ...

        <CheckBox
            android:id="@+id/checkBox2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginTop="8dp"
            android:text="Type 1"
            android:textAlignment="viewStart"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView"
            android:onClick="onCheckboxClicked"/>

        <CheckBox
            android:id="@+id/checkBox3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginTop="4dp"
            android:layout_marginBottom="8dp"
            android:text="Type 2"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/checkBox2"
            android:onClick="onCheckBoxClicked"/>

            ....

    </androidx.constraintlayout.widget.ConstraintLayout>


    </androidx.cardview.widget.CardView>

在DialogFragment的android：onClick属性的父级或祖先上下文中找不到方法onCheckboxClicked（View）

0 个答案: