Layout problem with button margin

Question

I have problem with organizing layout in android aplication. I\'m dynamically creating buttons and adding them with this code to my layout:

    LayoutInflate         


        

Answer 1

Setting layout_weight on the buttons themselves will cause the buttons to expand without having space between them. LinearLayout never adds space between its child views.

You should wrap each one in a FrameLayout and use layout_gravity="center" on your buttons, then set layout_weight="1" on the FrameLayout.

<FrameLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_weight="1">
    <Button android:layout_{width,height}="wrap_content"
       android:layout_gravity="center"/>
</FrameLayout>

Answer 2

This also worked by embedding the TextView into a LinearLayout (vertical)

text_view.xml

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

    <TextView
              android:layout_width="fill_parent"
              android:layout_height="wrap_content"
              android:textAppearance="?android:attr/textAppearanceLarge"
              android:text="Large Text"
              android:id="@+id/textView"
              android:layout_margin="10dp"
              android:textColor="@color/white"/>

</LinearLayout>

This was embedded into another view where the root view is also a LinerLayout. A convoluted workaround...

Answer 3

Remember, android:layout_* attributes are LayoutParams. They are arguments to the parent and affect how the parent will perform layout on that view. You're specifying layout_margin attributes on your buttons, but they're getting ignored. Here's why:

Since LayoutParams are specific to the parent view type, you need to supply an instance of the correct parent type when you inflate layouts using a LayoutInflater or else layout_ attributes on the top-level view in the layout will be dropped. (The inflater would have no idea what type of LayoutParams to generate.)

Since buttonList is your intended parent for the button views, change your inflate line to this:

btn = (Button) layoutInflater.inflate(R.layout.button, buttonList, false);