Android TabLayout设置指示器宽度的方法

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  int dp10 = CommUitls.dip2px(context, 10);
  LinearLayout mTabStrip = (LinearLayout) this.getChildAt(0);
  try {
    Field mTabs = TabLayout.class.getDeclaredField("mTabs");
    mTabs.setAccessible(true);
    ArrayList tabs = (ArrayList) mTabs.get(this);
    for (int i = 0; i < mTabStrip.getChildCount(); i++) {
      Tab tab = tabs.get(i);
      Field mView = tab.getClass().getDeclaredField("mView");
      mView.setAccessible(true);
      Object tabView = mView.get(tab);
      Field mTextView = context.getClassLoader().loadClass("android.support.design.widget.TabLayout$TabView").getDeclaredField("mTextView");
      mTextView.setAccessible(true);
      TextView textView = (TextView) mTextView.get(tabView);
      float textWidth = textView.getPaint().measureText(textView.getText().toString());
      View child = mTabStrip.getChildAt(i);
      child.setPadding(0, 0, 0, 0);
      LinearLayout.LayoutParams params = new LinearLayout.LayoutParams((int) textWidth, LinearLayout.LayoutParams.MATCH_PARENT);
      params.leftMargin = dp10;
      params.rightMargin = dp10;
      child.setLayoutParams(params);
      child.invalidate();
    }
  } catch (Exception e) {
    e.printStackTrace();
  }
}