I found TextView in RecyclerView can select first time ,but when ViewHolder was recycled or adapter notifyDataSetChanged,all text view will can't be selected.
And I found this solution was working for me.
yourTextView.setText("your text");
yourTextView.setTextIsSelectable(false);
yourTextView.measure(-1, -1);//you can specific other values.
yourTextView.setTextIsSelectable(true);
Why do this? because I have debugged and found some logic in android source code:
TextView.java:
public void setTextIsSelectable(boolean selectable) {
    if (!selectable && mEditor == null) return; // false is default value with no edit data
    createEditorIfNeeded();
    if (mEditor.mTextIsSelectable == selectable) return;
    mEditor.mTextIsSelectable = selectable;
    setFocusableInTouchMode(selectable);
    setFocusable(FOCUSABLE_AUTO);
    setClickable(selectable);
    setLongClickable(selectable);
    // mInputType should already be EditorInfo.TYPE_NULL and mInput should be null
    setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
    setText(mText, selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
    // Called by setText above, but safer in case of future code changes
    mEditor.prepareCursorControllers();
}
Editor.java
void prepareCursorControllers() {
    boolean windowSupportsHandles = false;
    ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams();
    if (params instanceof WindowManager.LayoutParams) {
        WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
        windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
                || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
    }
    boolean enabled = windowSupportsHandles && mTextView.getLayout() != null;
    mInsertionControllerEnabled = enabled && isCursorVisible();
    **mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected();**
    if (!mInsertionControllerEnabled) {
        hideInsertionPointCursorController();
        if (mInsertionPointCursorController != null) {
            mInsertionPointCursorController.onDetached();
            mInsertionPointCursorController = null;
        }
    }
    if (!mSelectionControllerEnabled) {
        stopTextActionMode();
        if (mSelectionModifierCursorController != null) {
            mSelectionModifierCursorController.onDetached();
            mSelectionModifierCursorController = null;
        }
    }
}
---> TextView.java
/**
 * Test based on the <i>intrinsic</i> charateristics of the TextView.
 * The text must be spannable and the movement method must allow for arbitary selection.
 *
 * See also {@link #canSelectText()}.
 */
boolean textCanBeSelected() {
    // prepareCursorController() relies on this method.
    // If you change this condition, make sure prepareCursorController is called anywhere
    // the value of this condition might be changed.
    if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
    return isTextEditable()
            || (isTextSelectable() && mText instanceof Spannable && isEnabled());
}
you can debug in Emulator and trace this code.