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copied!<p>Each element can have exactly one parent, that's an XML file structure.</p> <p>In your layout xml file you defined <code>layoutTopicGrade</code> as the child of <code>layoutFilterContent</code>. Then, in the code, you set <code>layoutTopicGrade</code> as the child of the newly created <code>ScrollView</code>.</p> <p>You should wrap your <code>layoutTopicGrade</code> the <code>ScrollView</code>. Also, since you're not doing any dynamic configuration to the <code>ScrollView</code>, there's no reason adding it in the code, you should do it straight in the layout xml file:</p> <pre><code><ScrollView android:id="@+id/scrollViewTopicGrade" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@android:color/transparent" > <LinearLayout android:id="@+id/layoutTopicGrade" android:orientation="vertical" android:layout_width="0dp" android:layout_height="fill_parent" android:layout_weight="1" android:padding="0dp" android:background="#BCC6CC" > </LinearLayout> </ScrollView> </code></pre> <hr> <p><strong>EDIT</strong></p> <p>In order to have <code>layoutTopicGrade</code> take 25% of parent's width and <code>layoutGames</code> take 75%, do the following:</p> <ol> <li>Move the <code>layout_weight</code> and <code>layout_width</code> from <code>layoutTopicGrade</code> to the <code>ScrollView</code>.</li> <li>Set <code>ScrollView</code>'s <code>layout_weight</code> to <code>.25</code>.</li> <li>Set <code>layoutGames</code>'s <code>layout_weight</code> to <code>.75</code>.</li> <li><code>layoutTopicGrade</code>'s children should have <code>layout_width</code> set to <code>fill_parent</code>.</li> </ol> <p>See <a href="https://stackoverflow.com/a/6557686/978502">this answer</a>.</p> <hr> <p><strong>ADDITION</strong></p> <p>BTW, looks like the line <code>this.setContentView(scroll);</code> should be deleted. <code>Activity.setContentView</code> is used to set a view for the whole activity = whole screen. But your <code>ScrolView</code> is apparently only for the topic layout. Rather the whole game board is the activity's content view, as you use it a few lines of code earlier: <code>setContentView(R.layout.game_board);</code> (so keep that one).</p>

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