[Android]使用button切换TextView显见和不可见

 <Button        android:id="@+id/btnTest"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="Button"        />    <TextView        android:id="@+id/myTestText"        android:layout_width="fill_parent"        android:layout_height="30dp"        android:text="welcome"        android:visibility="gone"/>

button.setOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View arg0) {        textview.setVisibility(textview.getVisibility() == View.VISIBLE ? View.GONE : View.VISIBLE);               或者        if(textview.getVisibility() == View.VISIBLE)             textview.setVisibility(View.GONE);        else             textview.setVisibility(View.VISIBLE);            }});