5

Please look at the following image to understand the problem:

enter image description here

As you can see, there is a RelativeLayout which holds a custom View and a LinearLayout.
Between them, there is also another View, which Visibility is set to GONE. Now, when I press the Button, I would like to change the visibility of that GONE View to VISIBLE, and rearrange the RelativeLayout, so that the third View gets between custom View and LinearLayout. When I press another button, I would like to make third view GONE again. How can I achieve that?

Here is my XML:

<view
    android:id="@+id/CanvasView"
    android:layout_width="200dp"
    android:layout_height="40dp"
    android:layout_above="@+id/HorizontalScrollView"
    android:layout_centerHorizontal="true"
    android:layout_margin="0dp"
    android:layout_marginBottom="0dp"
    android:layout_marginTop="0dp"
    class="com.example.CanvasView"
    android:orientation="vertical" />

<HorizontalScrollView
    android:id="@+id/HorizontalScrollView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_above="@+id/linearLayout2"
    android:clickable="false"
    android:focusable="false"
    android:focusableInTouchMode="false"
    android:visibility="gone" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clickable="false"
        android:focusable="false"
        android:focusableInTouchMode="false"
        android:orientation="horizontal" >

    //SOME BUTTONS HERE
    </LinearLayout>

</HorizontalScrollView>

<LinearLayout
    android:id="@+id/linearLayout2"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_marginTop="5dp" >

    <Button
        android:id="@+id/button1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical|center_horizontal"
        android:layout_weight="0.4"
        android:maxWidth="200dp"
        android:text="Clear"
        android:textColor="@android:color/white"
        android:textSize="20sp" />

    <Button
        android:id="@+id/settingsButton"
        android:layout_width="44dp"
        android:layout_height="44dp"
        android:layout_gravity="center_vertical|center_horizontal"
        android:background="@drawable/settings_button_selector" />

    <Button
        android:id="@+id/button2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical|center_horizontal"
        android:layout_weight="0.4"
        android:enabled="false"
        android:maxWidth="200dp"
        android:text="Recognize"
        android:textColor="@android:color/white"
        android:textSize="20sp" />

</LinearLayout>

If I only setVisibility of the third view in OnClick() method, it will appear above LinearLayout and it will overlay the custom View (I tried it before). In other words, it will not move RelativeLayout up.

4

2 回答 2

12 
findViewById(R.id.button1).setOnClickListener(new OnClickListener(){
     public void onClick(View v) {
         findViewById(R.id.hiddenview).setVisibility(View.GONE);
         findViewById(R.id.relativelayout).invalidate();
     }
});
findViewById(R.id.button2).setOnClickListener(new OnClickListener(){
     public void onClick(View v) {
         findViewById(R.id.hiddenview).setVisibility(View.VISIBLE);
         findViewById(R.id.relativelayout).invalidate();
     }
});
于 2013-07-01T07:07:29.247 回答
-1

在您的活动中，onClick()获取该GONE视图的实例，View.VISIBLE以便它重新出现在两个视图之间。

 viewName.setVisibility(View.VISIBLE);

为此，介于两者之间的VIEW应该已经存在于 xml 中，只是GONE默认情况下！

于 2013-07-01T07:05:28.360 回答