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Is there a hard limit on the minimum height of a button in Android?
int screenWidth = getWindowManager().getDefaultDisplay().getWidth();
int buttonWidth = (screenWidth*2)/3;

int screenHeight = getWindowManager().getDefaultDisplay().getHeight();
int buttonHeight = (screenHeight-60)/14;

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="fill_parent"
    android:layout_width="fill_parent"
    android:orientation="vertical">
    <LinearLayout android:layout_height="wrap_content"
        android:layout_width="fill_parent"
        android:orientation="horizontal">
            <View android:layout_height="wrap_content"
                android:layout_width="fill_parent"
                android:layout_weight="2"/>
            <Button android:layout_height="wrap_content"
                android:layout_width="fill_parent"
                android:layout_weight="1"
                android:text="Button"
                android:id="@+id/button"/>
            <View android:layout_height="wrap_content"
                android:layout_width="fill_parent"
                android:layout_weight="2"/>
    </LinearLayout>
</LinearLayout>