Youtube Play / Pause Animated Vector Drawable on Android

Question

I am trying to make an animation like youtube Play / Pause using svgs paths and animated vector.

Strings.xml

<resources>
  <string name="app_name">AnimatedSvgTest</string>

  <string name="svg_triangle">
    M0,0 L0,24 12,12 0,0
  </string>
  <string name="svg_pause">
    M0,0 L0,24 M12,0 L12,24
  </string>
</resources>

anim/path_morph.xml:

<set xmlns:android="http://schemas.android.com/apk/res/android">
  <objectAnimator
    android:duration="4000"
    android:propertyName="pathData"
    android:valueFrom="@string/svg_triangle"
    android:valueTo="@string/svg_pause"
    android:valueType="pathType" />
</set>

drawable/avd.xml

<animated-vector xmlns:android="http://schemas.android.com/apk/res/android"
  android:drawable="@drawable/ic_play_arrow_24dp">
  <target
    android:name="play"
    android:animation="@anim/path_morph" />
</animated-vector>

drawable/ic_pause_arrow.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:pathData="@string/svg_pause"
    android:strokeColor="#000"
    android:strokeWidth="1.0" />
</vector>

drawable/ic_play_arrow.xml:

<vector xmlns:android="http://schemas.android.com/apk/res/android"
  android:width="100dp"
  android:height="100dp"
  android:viewportHeight="100.0"
  android:viewportWidth="100.0">
  <path
    android:fillColor="#FF000000"
    android:pathData="@string/svg_triangle" />
</vector>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context=".MainActivity">

  <ImageButton
    android:id="@+id/button"
    style="@style/Widget.AppCompat.Button.Borderless"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_centerInParent="true"
    android:src="@drawable/avd" />

</RelativeLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final ImageButton button = (ImageButton) findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        Animatable animatable = (Animatable) button.getDrawable();
        animatable.start();
      }
    });
  }
}

But I still get a crash Caused by: android.view.InflateException: Binary XML file line #2 Can't morph from: /

Answer 1

, . , , , , , , pathData . , , .

, fillColor, , , , , , 1.0, , .

, fillColor , , .

, . :

  <string name="svg_triangle">
M0,0 L0,24 12,12 0,0
  </string>
   <string name="svg_pause">
M0,0 L0,24 M12,0 L12,24
  </string>

, M L . :

  <string name="svg_triangle">
M0,0 L0,24 12,12 0,0 M12,0 L12,0 12,0 12,0
  </string>
  <string name="svg_pause">
M0,0 L0,24 1,24 1,0 M12,0 L12,24 13,24 13,0
  </string>

, M L . M12,0 L12,0 12,0 12,0 ; , , 12,0. , , , . , <path> drawable/ic_pause_arrow.xml, fillColor , , :

<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="#FF000000"
android:pathData="@string/svg_pause"/>
</vector>

, . . , , , . , , , , , , . , .