最近写到一个东西，一行文字里有两个TextView，只有一行，当文字超出时先省略前面的TextView。貌似iOS可以直接设置一个属性，Android中一时找不到设置哪些属性实现这个效果，不得已自定义了一个Layout，直接继承了LinearLayout，需要改的东西并不多。

public class EllipsisOptionalLayout extends LinearLayout {

  public EllipsisOptionalLayout(Context context) {
    super(context);
  }

  public EllipsisOptionalLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  public EllipsisOptionalLayout(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
  }

  /**
   * 重写onMeasure函数
   */
  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    // 只对两个TextView生效，其他没有尝试
    if (getChildCount() > 1) {
      View rightChildView = getChildAt(1);
      View leftChildView = getChildAt(0);
      int leftMargin = 0;
      int rightMargin = 0;
      // 计算两个子View的margin大小
      try {
        rightMargin = ((MarginLayoutParams) rightChildView.getLayoutParams()).leftMargin
            + ((MarginLayoutParams) rightChildView.getLayoutParams()).rightMargin;
        leftMargin = ((MarginLayoutParams) leftChildView.getLayoutParams()).leftMargin
            + ((MarginLayoutParams) leftChildView.getLayoutParams()).rightMargin;
      } catch (Exception e) {
        Log.e("EllipsisOptionalLayout", "cast failed");
      }
      // 计算右边View的宽度
      int rightChildWidth = rightChildView.getMeasuredWidth()
          + rightChildView.getPaddingLeft()
          + rightChildView.getPaddingRight() + rightMargin;
      getChildAt(1).measure(
          MeasureSpec.makeMeasureSpec(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.AT_MOST),
          heightMeasureSpec);
      int rightChildMaxWidth = rightChildView.getMeasuredWidth()
          + rightMargin;
      int selfWidth = getMeasuredWidth();
      if (rightChildWidth < rightChildMaxWidth) {
        // 留给左边View的宽度
        int allowLeftChildWidth = selfWidth
            - rightChildMaxWidth
            - leftMargin
            - leftChildView.getPaddingLeft()
            - leftChildView.getPaddingRight();
        getChildAt(0).measure(MeasureSpec.makeMeasureSpec(allowLeftChildWidth, MeasureSpec.AT_MOST),
            heightMeasureSpec);
      }
    }
  }
}

使用起来和LinearLayout一样,加上背景色看看效果

<com.k.demo.EllipsisOptionalLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#96CDCD"
    android:orientation="horizontal">

    <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:ellipsize="end"
      android:maxLines="1"
      android:text=""
      android:textColor="#222222"
      android:background="#FFEFD5"
      android:textSize="15sp"
      android:textStyle="bold" />

    <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:maxLines="1"
      android:text=""
      android:textColor="#222222"
      android:background="#BBFFFF"
      android:textSize="15sp" />
  </com.k.demo.EllipsisOptionalLayout>

文字长度未超出时：

image.png

长度超出时：

image.png

nice!
如有不足，欢迎指正。