title: GridLayout from Support Library doesn't work correctly on API 16-17
body: <p>I need to create smth like calculator keyboard. <code>GridLayout</code> is ideal for it (and only for it :) ). So, I use the one from Support Library (<code>compile 'com.android.support:gridlayout-v7:22.2.0'</code>. Here is my xml:</p>
  
  <pre><code>&lt;android.support.v7.widget.GridLayout
          android:layout_width="match_parent"
          android:layout_height="0dp"
          app:columnCount="4"
          app:rowCount="4"
          android:layout_gravity="bottom"
          android:layout_weight="4"
          app:alignmentMode="alignBounds"
          app:rowOrderPreserved="false"
          app:orientation="horizontal"&gt;
  
      &lt;Button android:text="7"
              android:id="@+id/button7"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
      &lt;Button android:text="8"
              android:id="@+id/button8"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
      &lt;Button android:text="9"
              android:id="@+id/button9"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
      &lt;Button android:text="←"
              android:id="@+id/button_backspace"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
  
      &lt;Button android:text="4"
              android:id="@+id/button4"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
      &lt;Button android:text="5"
              android:id="@+id/button5"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
      &lt;Button android:text="6"
              android:id="@+id/button6"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
      &lt;Button android:text="@string/clean"
              android:id="@+id/button_clear"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
  
      &lt;Button android:text="1"
              android:id="@+id/button1"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
      &lt;Button android:text="2"
              android:id="@+id/button2"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
      &lt;Button android:text="3"
              android:id="@+id/button3"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
      &lt;Button
              android:id="@+id/button_clear_all"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              app:layout_gravity="fill_vertical"
              android:text="@string/clean_all"
              app:layout_rowSpan="2"
              android:background="@color/calculator_button_separator_color"
              android:textColor="@drawable/light_button_text_color"
              style="@style/CalculatorButton"/&gt;
  
      &lt;Button
              android:id="@+id/button0"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              app:layout_gravity="fill_horizontal"
              android:text="0"
              app:layout_columnSpan="2"
              style="@style/CalculatorButton"/&gt;
      &lt;Button android:text="."
              android:id="@+id/button_dot"
              app:layout_columnWeight="1"
              app:layout_rowWeight="1"
              style="@style/CalculatorButton"/&gt;
  
  &lt;/android.support.v7.widget.GridLayout&gt;
  </code></pre>
  
  <p>On Android 4.3-4.4 all is okay:</p>
  
  <p><img src="https://habrastorage.org/files/723/7fb/450/7237fb45018948009a0a951807c341a0.png" width="200"/></p>
  
  <p>But there are troubles on Android 4.1-4.2:</p>
  
  <p><img src="https://habrastorage.org/files/92b/564/c3f/92b564c3f558401c9f955f8289db7c2c.png" width="200"/></p>
  
  <p>So, I cannot understand where is my bad.</p>