为什么我的监听起不起作用

Question

public class MainActivity extends Activity { private TextView tv; private ScrollView scroll;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        tv=(TextView) findViewById(R.id.textView1);        tv.setText(getResources().getString(R.string.text));               scroll=(ScrollView) findViewById(R.id.scrollView1);                scroll.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View arg0, MotionEvent arg1) { /* * getScrollY():滚动条滑动的距离 * getMeasuredHeight():文本长度 * getHeight();屏幕的高度 */ switch (arg1.getAction()) { case MotionEvent.ACTION_MOVE: { //顶部状态 if(scroll.getScaleY()<=0){ Toast.makeText(MainActivity.this, "滚动条在顶部", Toast.LENGTH_SHORT).show(); } //底部状态 //文本的长度<=屏幕的高度+滚动条滚动的距离 //TextView是父容器（屏幕）的第一个孩子 if(scroll.getChildAt(0).getMeasuredHeight()<=scroll.getScaleY()+scroll.getHeight()){ Toast.makeText(MainActivity.this, "滑动到了底部", Toast.LENGTH_SHORT).show(); //加载新文本内容 tv.append(getResources().getString(R.string.text1)); } break; } } return false; } });    }   }

Answer 1

试试onTouch最后改成return true