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POChange background Drawable padding dynamically
 

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  1. POChange background Drawable padding dynamically
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    <p>I want to Create a View that receives a percentage and displays only this part of background dynamically, as a parameter.</p> <p>E.g. when creating a view with parameter 0.8; the background is drawn only in 80% of View width (0% padding left, 20% padding right).</p> <p>I tried to create a DrawableGradient as a View background, but it overlaps whole background and I cannot resize this background.</p> <p>My next choice was to create InsetDrawable or Layer-List like in this answer: <a href="https://stackoverflow.com/questions/13591836/android-drawable-with-background-and-gradient-on-the-left">Android drawable with background and gradient on the left</a>, but I cannot change the padding dynamically.</p> <p>The example I use currently: res/layout/acitvity_main.xml</p> <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:layout_margin="5dp" tools:context=".MainActivity" &gt; &lt;TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/percentage_background_80" android:text="80%" android:textSize="16sp"/&gt; &lt;TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@drawable/percentage_background_20" android:text="20%" android:textSize="16sp"/&gt; &lt;/LinearLayout&gt; </code></pre> <p>drawable/percentage_background_20.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;layer-list xmlns:android="http://schemas.android.com/apk/res/android" &gt; &lt;item android:bottom="5dp" android:drawable="@drawable/background" android:left="5dp" android:right="5dp" android:top="5dp"/&gt; &lt;item android:bottom="5dp" android:drawable="@drawable/view_background" android:left="5dp" android:right="200dp" android:top="5dp"/&gt; &lt;/layer-list&gt; </code></pre> <p>drawable/percentage_background_80.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;layer-list xmlns:android="http://schemas.android.com/apk/res/android" &gt; &lt;item android:bottom="5dp" android:drawable="@drawable/background" android:left="5dp" android:right="5dp" android:top="5dp"/&gt; &lt;item android:bottom="5dp" android:drawable="@drawable/view_background" android:left="5dp" android:right="50dp" android:top="5dp"/&gt; &lt;/layer-list&gt; </code></pre> <p>drawable/background.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" &gt; &lt;solid android:color="@android:color/white" /&gt; &lt;/shape&gt; </code></pre> <p>drawable/view_background.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt; &lt;item&gt;&lt;shape&gt; &lt;gradient android:angle="0" android:startColor="@android:color/holo_blue_dark" android:endColor="@android:color/white" android:type="linear" /&gt; &lt;/shape&gt; &lt;/item&gt; &lt;/selector&gt; </code></pre> <p>This is how it looks, but I cannot change the values of padding in a list from a source code. Do you know how can I achieve it?</p> <p><img src="https://i.stack.imgur.com/vnLSf.png" alt="Background with percentage"></p> <p>Clarification: in drawable/percentage_background_80.xml and drawable/percentage_background_20.xml there are elements:</p> <pre><code>android:right="XXXdp" </code></pre> <p>I want to change the values XXXdp programatically.</p>
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    1. COwhy dont you use a ClipDrawable ?
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    2. COWell, ClipDrawable is almost what I need, but it clips the Drawable from both sides. I couldn't clip it only from the right-hand side.
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    3. COuse proper Gravity in ClipDrawable constructor
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