android-基础编程-ScrollView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="wrap_content">
     <HorizontalScrollView
        android:id="@+id/horizontalScrollView1"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:scrollbars="none"
         >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:textSize="22sp"
            android:text="shuiping scroll dfffffffffffffffffffffffffffffffffffffffffffffffffffffff"/>
    </HorizontalScrollView>
    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="向上" />

    <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="向下" />
    <ScrollView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/scrollview"
    android:scrollbars="vertical"
    android:scrollbarTrackVertical="@color/colorAccent"
    android:scrollbarThumbVertical="@color/colorPrimary"
        android:scrollbarStyle="outsideInset">
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <TextView
            android:layout_width="5000dp"
            android:layout_height="500dp"
            android:text="zcxzcxzcx"/>
        <TextView
            android:layout_width="5000dp"
            android:layout_height="500dp"
            android:text="zcxzcxzcx"/>
    </LinearLayout>

</ScrollView>
</LinearLayout>

public class ScrollViewActi extends Activity implements View.OnClickListener{
    private ScrollView scrollView;
    private Button button1;
    private Button button2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.scrollview);
        button1 = (Button) findViewById(R.id.button1);
        button2 = (Button) findViewById(R.id.button2);
        scrollView = (ScrollView) findViewById(R.id.scrollview);
        button1.setOnClickListener(this);
        button2.setOnClickListener(this);

        //这里是为textView赋值，内容在R.string.text中，测试时最好内容长一些，这里不再贴出。
        //textView.setText(getResources().getString(R.string.text));
        scrollView.setOnTouchListener(new View.OnTouchListener() {

            @TargetApi(Build.VERSION_CODES.HONEYCOMB)
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                switch (event.getAction()) {
                    //手指抬起
                    case MotionEvent.ACTION_UP:

                        break;

                    //手指落下
                    case MotionEvent.ACTION_DOWN:

                        break;

                    //手指滑动
                    case MotionEvent.ACTION_MOVE:
                        /**
                         * 1、getScorollY()——滚动条滑动的距离
                         * 2、getMeasuredHeight()——内容的整体高度，包括隐藏部分
                         * 3、getHeight()——显示高度。内容未布满屏幕，2=3；内容大于屏幕，3=屏幕高度，2>3。
                         */
                        //顶部状态
                        if(scrollView.getScrollY()<=0){
                            Log.e(">>>>>>>>>>>>>>", "顶部");
                            Toast.makeText(getApplicationContext(), "顶部", Toast.LENGTH_SHORT).show();
                        }

                        //顶部状态
                        //TextView的总高度<=一屏幕的高度+滚动条的滚动距离(getChildAt(0):第0个子控件)
                        if(scrollView.getChildAt(0).getMeasuredHeight()<= scrollView.getScrollY() + scrollView.getHeight()){
                            Log.e(">>>>>>>>>>>>>>", "底部");
                            Toast.makeText(getApplicationContext(), "底部", Toast.LENGTH_SHORT).show();

                            //在文本中追加内容
                            //textView.append("111111111111111111111");
                        }
                        break;
                }
                return false;
            }
        });
    }

    @Override
    public void onClick(View v) {
        //scrollTo:以滚动视图起始位置开始计算的
        //scrollBy:相对前一次的位置，滚动相应的距离
        switch (v.getId()) {
            case R.id.button1:
          scrollView.scrollTo(0, -30);
            //    scrollView.scrollBy(0, -30);
                break;

            case R.id.button2:
          scrollView.scrollTo(0, -30);
           //     scrollView.scrollBy(0, 30);
                break;
        }
    }
}