Attempt to read from field 'int android.graphics.Rect.bottom' on a null object reference

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我是靠谱客的博主糊涂项链，这篇文章主要介绍Attempt to read from field 'int android.graphics.Rect.bottom' on a null object reference，现在分享给大家，希望可以做个参考。

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22881 22881 E AndroidRuntime: java.lang.NullPointerException: Attempt to read from field 'int android.graphics.Rect.bottom' on a null object reference
22881 22881 E AndroidRuntime:
at com.xxx.xxx.TouchableImageSpan.draw(TouchableImageSpan.java:122)
22881 22881 E AndroidRuntime:
at android.text.TextLine.handleReplacement(TextLine.java:825)
22881 22881 E AndroidRuntime:
at android.text.TextLine.handleRun(TextLine.java:908)
22881 22881 E AndroidRuntime:
at android.text.TextLine.drawRun(TextLine.java:368)
22881 22881 E AndroidRuntime:
at android.text.TextLine.draw(TextLine.java:196)

NullPointerException 是 bottom 为null？

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@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y,
int bottom, Paint paint) {
mLeft = (int) x;
mBottom = bottom;
BitmapDrawable cachedBmp = getCachedDrawable();
canvas.save();
int i = bottom - nBounds.bottom;
}