How to get vector selector drawable in Java code

Question

I used vector selector drawable in xml which works well, but crash in Java code when sdk < 21.

Here is my xml usage:

<android.support.v7.widget.AppCompatTextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:drawableLeft="@drawable/common_selector_ic_back"/>

common_selecor_ic_back.xml

<selector
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/common_ic_back" />
</selector>

common_ic_back.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportHeight="24.0"
    android:viewportWidth="24.0">
<path
    android:fillColor="#FFFFFFFF"
    android:pathData="M20,11H7.83l5.59,-5.59L12,4l-8,8 8,8 1.41,-1.41L7.83,13H20v-2z"/>

But I want to change the drawableLeft in code, I tried three solution, both failed.

1

Drawable d1 = getResources().getDrawable(R.drawable.common_selector_ic_back);

crashed with

android.content.res.Resources$NotFoundException: File res/drawable/common_selector_ic_back.xml from drawable resource ID

0x7f080065

2

icon2 = AppCompatResources.getDrawable(this, R.drawable.common_selector_ic_back);

failed with same reason

3

VectorDrawableCompat.create(context.getResources(), R.drawable.common_selector_ic_back, context.getTheme());

failed with log

Binary XML file line #2 tag requires viewportWidth > 0

Any one meet the problem? Can you tell me how to get vector selector drawable in hardware code.

Solution:

The activity must be AppCompatActivity

Answer 1

Change the Activity to extends AppCompatActivity