将文本编辑为changecontact
edittext焦点在android studio中不起作用，我想在edittext中焦点改变时隐藏一个textview，如何做到这一点？

ChangeContact.setOnFocusChangeListener(new View.OnFocusChangeListener() {
                @Override
                public void onFocusChange(View v, boolean hasFocus) {
                    if (!hasFocus) {
                        Toast.makeText(mContext, "focus loosed", Toast.LENGTH_LONG).show();

                    } else {
                        Toast.makeText(mContext, "focused", Toast.LENGTH_LONG).show();
                        bookLinear.setVisibility(View.GONE);
                    }
                }
            });

在xml文件中编辑文本

<EditText
                    android:id="@+id/etChangeAddress"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="6dp"
                    android:layout_marginBottom="8dp"
                    android:background="@drawable/shape_transparent"
                    android:ems="10"
                    android:focusable="true"
                    android:focusableInTouchMode="true"
                    android:gravity="center"
                    android:hint="Address"
                    android:inputType="textPersonName"
                    android:padding="5dp"
                    app:layout_constraintBottom_toTopOf="@+id/etChangeNumber"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent" />

但我看不到祝酒词
请帮忙。。。。