Android 点击按钮显示和隐藏控件

activity_main 布局

    <Button
        android:id="@+id/btn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="点击"/>
    <LinearLayout
        android:id="@+id/ll_view"
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:orientation="horizontal"
        android:visibility="visible"
        android:background="#333"/>

Java 代码

final LinearLayout linearLayout = (LinearLayout) findViewById(R.id.ll_view);
        final Button hide = findViewById(R.id.btn);
        show = true;
        hide.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if (show){
                    linearLayout.setVisibility(View.VISIBLE);
                    show = false;
                }else {
                    linearLayout.setVisibility(View.GONE);
                    show = true;
                }
            }
        });