Change items by Java code

Question

I have the following XML:

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

<item android:id="@+id/customPlayerProgressBg">
    <shape>
        <gradient
                android:startColor="#FF999999"
                android:endColor="#FF999999"
        />
    </shape>
</item>

<item android:id="@+id/customPlayerProgressSecondary">
    <clip>
        <shape>
            <gradient
                    android:startColor="#FF5C3C68"
                    android:endColor="#FF5C3C68"
            />
        </shape>
    </clip>
</item>
<item
    android:id="@+id/customPlayerProgress"
>
    <clip>
        <shape>
            <gradient
                android:startColor="#FF5C3C68"
                android:endColor="#FF5C3C68"
            />
        </shape>
    </clip>
</item>

</layer-list>

I want to change the "customPlayerProgress" and the "customPlayerProgressSecondary" by Java code. How can that be accomplished?

Possible duplicate of [How to change a layer-list drawable?](http://stackoverflow.com/questions/8018435/how-to-change-a-layer-list-drawable) — Jonik, Jun 07 '16 at 15:21

score 9 · Accepted Answer · edited May 23 '17 at 12:19

9

Assuming that you want to have access to them through Java code after they are loaded as a Drawable in your app, you should be able to do something like the following:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    final LayerDrawable ld = (LayerDrawable) getResources().getDrawable(R.drawable.my_drawable);
    final ClipDrawable d1 = (ClipDrawable) ld.findDrawableByLayerId(R.id.customPlayerProgress);
    final ClipDrawable d2 = (ClipDrawable) ld.findDrawableByLayerId(R.id.customPlayerProgressSecondary);

    /* modify ld, d1 and d2 by calling their methods here */
}

Also look at this for some more ideas.

edited May 23 '17 at 12:19

Community

1
1

answered Jan 23 '12 at 20:24

Joe

13,858
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Worked. R.id.customPlayerProgress was not being recognized, i had to rebuild the project (Project > Clean, then Build). – voghDev Sep 05 '14 at 23:43
It seems that "getResources().getDrawable(R.drawable.my_drawable)" doesn't return the same object that can be obtained in code. Isn't it better to get LayerDrawable object using "view.getBackground()" ? – Ehsan Heidari Sep 18 '17 at 12:22

score 1 · Answer 2 · answered Jan 23 '12 at 19:43

1

You can't change generated XML files at run-time.

answered Jan 23 '12 at 19:43

Cody

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score 0 · Answer 3 · answered Jan 23 '12 at 18:44

0

You may be familiar with DOM. You just need to modify the change and then save the file.

Here is an article that may be of some assistance.

answered Jan 23 '12 at 18:44

prolink007

30,784
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Change items by Java code

3 Answers3

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