Android中自定义ScrollView的滑动监听事件

来源：互联网发布：淘宝店用喜宝动力效果编辑：程序博客网时间：2024/05/07 19:36

项目结构：

1.LazyScrollView类（自定义ScrollView）

package android.zhh.com.myapplicationscrollview;/** * Created by sky on 2017/3/19. */import android.content.Context;import android.graphics.Rect;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.widget.ScrollView;/** * Created by sky on 2017/3/17. */public class LazyScrollView extends ScrollView {    private static final long DELAY = 100;    private int currentScroll;    private Runnable scrollCheckTask;    /**     * @param context     */    public LazyScrollView(Context context) {        super(context);        init();    }    /**     * @param context     * @param attrs     */    public LazyScrollView(Context context, AttributeSet attrs) {        super(context, attrs);        init();    }    /**     * @param context     * @param attrs     * @param defStyle     */    public LazyScrollView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        init();    }    private void init() {        scrollCheckTask = new Runnable() {            @Override            public void run() {                int newScroll = getScrollY();                if (currentScroll == newScroll) {                    if (onScrollListener != null) {                        onScrollListener.onScrollStopped();                    }                } else {                    if (onScrollListener != null) {                        onScrollListener.onScrolling();                    }                    currentScroll = getScrollY();                    postDelayed(scrollCheckTask, DELAY);                }            }        };        setOnTouchListener(new OnTouchListener() {            @Override            public boolean onTouch(View v, MotionEvent event) {                if (event.getAction() == MotionEvent.ACTION_UP) {                    currentScroll = getScrollY();                    postDelayed(scrollCheckTask, DELAY);                }                return false;            }        });    }    public interface OnScrollListener {        public void onScrollChanged(int x, int y, int oldX, int oldY);        public void onScrollStopped();        public void onScrolling();    }    private OnScrollListener onScrollListener;    /**     * @param onScrollListener     */    public void setOnScrollListener(OnScrollListener onScrollListener) {        this.onScrollListener = onScrollListener;    }    @Override    protected void onScrollChanged(int x, int y, int oldX, int oldY) {        super.onScrollChanged(x, y, oldX, oldY);        if (onScrollListener != null) {            onScrollListener.onScrollChanged(x, y, oldX, oldY);        }    }    /**     * @param child     * @return     */    public boolean isChildVisible(View child) {        if (child == null) {            return false;        }        Rect scrollBounds = new Rect();        getHitRect(scrollBounds);        return child.getLocalVisibleRect(scrollBounds);    }    /**     * @return     */    public boolean isAtTop() {        return getScrollY() <= 0;    }    /**     * @return     */    public boolean isAtBottom() {        return getChildAt(getChildCount() - 1).getBottom() + getPaddingBottom() == getHeight() + getScrollY();    }}
2activity_main.xml（布局文件中引用）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity"    android:orientation="vertical"    >    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="match_parent">        <android.zhh.com.myapplicationscrollview.LazyScrollView            android:id="@+id/myScrollView"            android:layout_width="match_parent"            android:layout_height="match_parent">            <LinearLayout                android:layout_width="match_parent"                android:layout_height="match_parent"                android:orientation="vertical"                >                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />                <TextView                    android:layout_width="match_parent"                    android:layout_height="30dp"                    android:text="我是翟浩浩"                    android:gravity="center"                    />            </LinearLayout>        </android.zhh.com.myapplicationscrollview.LazyScrollView>    </RelativeLayout></LinearLayout>

3MainActivity（调用监听事件）

package android.zhh.com.myapplicationscrollview;import android.app.Activity;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.Menu;import android.view.MenuItem;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {//  初始化自定义的ScrollView    private LazyScrollView myScrollView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        myScrollView = (LazyScrollView)findViewById(R.id.myScrollView);//      自定义的ScrollView的滑动监听事件        myScrollView.setOnScrollListener(new LazyScrollView.OnScrollListener() {            @Override            public void onScrollChanged(int x, int y, int oldX, int oldY) {                Log.e("@", "x:" + oldX + "->" + x + ", y:" + oldY + "->" + y);            }            @Override            public void onScrollStopped() {                if (myScrollView.isAtTop()) {                    Toast.makeText(MainActivity.this, "Stopped at top", Toast.LENGTH_SHORT).show();                } else if (myScrollView.isAtBottom()) {                    Toast.makeText(MainActivity.this, "Stopped at bottom", Toast.LENGTH_SHORT).show();                } else {                    Toast.makeText(MainActivity.this, "Stopped", Toast.LENGTH_SHORT).show();                }            }            @Override            public void onScrolling() {                Log.e("@", "scrolling...");            }        });    }}

源码下载：

http://download.csdn.net/detail/zhaihaohao1/9786448

0 0