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