Android displays Gif format pictures through Movie

public class CommonGifView extends View {
  private Resources mResources;
  private Movie mMovie;
  private long startTime = 0;
  private float widthRatio;
  private float heightRatio;

  public CommonGifView(Context context) {
    this(context, null);
  }

  public CommonGifView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
  }

  public CommonGifView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    mResources = ();
    TypedArray ta = (attrs, .custom_gif_view);
    int src_id = (.custom_gif_view_gif_src, -1);
    setGifViewBg(src_id);
    ();
  }

  /**
    * Set gif format image background for View
    * @description:
    * @author ldm
    * @date 2016-2-18 9:21:16 AM
    */
  private void setGifViewBg(int src_id) {
    if (src_id == -1) { return; }
    // Get the input stream of the corresponding resource file    InputStream is = (src_id);
    mMovie = (is);// Decode the input stream as a Movie object    requestLayout();
  }

  /*
    * This method is for use in Activity
    */
  public void setGifStream(InputStream is) {
    mMovie = (is);
    requestLayout();
  }

  @Override
  protected void onDraw(Canvas canvas) {
    (canvas);
    long now = ();
    if (startTime == 0) { // If the first frame is to record the start time      startTime = now;
    }
    if (mMovie != null) {// If the return value is not equal to null, it means that this is a GIF image      int duration = ();// The duration of the animation is removed      if (duration == 0) {
        duration = 1000;
      }
      int currentTime = (int) ((now - startTime) % duration);// Calculate which frame to display      (currentTime);
      // (canvas, getWidth() - (), getHeight() - ());
      float scale = (widthRatio, heightRatio);
      (scale, scale);
      (canvas, 0, 0);
      invalidate();
    }
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    if (mMovie != null) {// If the return value is not equal to null, it means that this is a GIF image      int w = ();//width      int h = ();//high      if (w <= 0) {
        w = 1;
      }
      if (h <= 0) {
        h = 1;
      }
      int left = getPaddingLeft();
      int right = getPaddingRight();
      int top = getPaddingTop();
      int bottom = getPaddingBottom();
      int widthSize, heightSize;
      w += left + right;
      h += top + bottom;
      w = (w, getSuggestedMinimumWidth());
      h = (h, getSuggestedMinimumHeight());
      widthSize = resolveSizeAndState(w, widthMeasureSpec, 0);//Return the size value you want based on the size and MeasureSpec you provide      heightSize = resolveSizeAndState(h, heightMeasureSpec, 0);
      widthRatio = (float) widthSize / w;
      heightRatio = (float) heightSize / h;
      setMeasuredDimension(widthSize, heightSize);
    }
    else {
      (widthMeasureSpec, heightMeasureSpec);
    }
  }
}

<?xml version="1.0" encoding="utf-8"?>
<resources>

  <declare-styleable name="custom_gif_view">
    <attr name="gif_src" format="reference"></attr>
  </declare-styleable>

</resources>

public class MainActivity extends Activity {
  private CommonGifView view;
  private InputStream is;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    (savedInstanceState);
    setContentView(.activity_main);
    view = (CommonGifView) findViewById(.gif_test);
    try {
      is = getAssets().open("");
      (is);
    }
    catch (IOException e) {
      ();
    }

  }
}