[Android]使用button切换TextView可见和不可见

 <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);

    }
});