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1。底部BottomView的内容如下，这个XML文件的内容是自定义的，根据各项目的内容需求来定义的，我例子中bottom_view.xml:
2、main.xml如下
3、自定义ListView控件BottomFloatListView
package com.example.BottomFloatListView;
import android.content.Context;
import android.os.Handler;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.OvershootInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.*;
import android.widget.AbsListView.OnScrollListener;
/**
* 底部View自动隐藏和消失listview(其他ListView可以继承该类，如CtripBottomRefreshListView类等)
**/
public class BottomFloatListView extends ListView implements OnScrollListener {
public View mBottomBar;
private int mCurrentScrollState;
private boolean bIsMoved = false;
private boolean bIsDown = false;
private int mDeltaY;
private float mMotionY;
private int oldFirstVisibleItem = 0;
private Handler mHandler = new Handler();
private static final String TAG = "BottomFloatListView";
public BottomFloatListView(Context context) {
this(context, null);
super.setOnScrollListener(this);
}
public BottomFloatListView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
super.setOnScrollListener(this);
}
public BottomFloatListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
super.setOnScrollListener(this);
}
@Override
public void setAdapter(ListAdapter adapter) {
super.setAdapter(adapter);
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
showBottomViewOnBottom(visibleItemCount, totalItemCount, firstVisibleItem);
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
hideBottomViewOnScrollStateChanged(view, scrollState);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
float y = ev.getY();
float x = ev.getX();
Log.d("FloatListView", "onTouchEvent" + "" + x + "" + y);
int action = ev.getAction() & MotionEvent.ACTION_MASK;
switch (action) {
case MotionEvent.ACTION_DOWN:
action_down(y);
break;
case MotionEvent.ACTION_MOVE:
mDeltaY = (int) (y - mMotionY);
bIsMoved = true;
//移动的时候，要移除掉显示bottomView的消息
mHandler.removeCallbacks(showBottomBarRunnable);
//补齐action_down事件，因为有的时候，action_down 事件没有执行
action_down(y);
break;
case MotionEvent.ACTION_UP:
bIsMoved = false;
bIsDown = false;
if (!bIsMoved && !bIsDown) {
// 如果屏幕上什么没做，则过2s之后要显示bottomView
mHandler.postDelayed(showBottomBarRunnable, 2000);
}
if (mDeltaY < 0) { //下滑影藏
hideBottomBar();
} else { //上滑显示
showBottomBar();
}
bIsMoved = false;
break;
}
return super.onTouchEvent(ev);
}
private void action_down(float y){
mMotionY = y;
bIsDown = true;
Log.d(TAG, "action down execed");
mHandler.removeCallbacks(showBottomBarRunnable);
}
/**
* 滑动到顶部时，要隐藏bottomView
* @param view
* @param scrollState
*/
private void hideBottomViewOnScrollStateChanged(AbsListView view, int scrollState) {
mCurrentScrollState = scrollState;
if(view!=null){
if (view.getFirstVisiblePosition() == 0 && scrollState == SCROLL_STATE_IDLE) {
hideBottomBar();
Log.d(TAG, "hide bottom view");
}
}
}
/**
* 显示底部浮动栏
*/
public void showBottomBar() {
if (mBottomBar != null && mBottomBar.getVisibility() == View.GONE) {
mBottomBar.setVisibility(View.INVISIBLE);
Animation translateAnimation = new TranslateAnimation(mBottomBar.getLeft(), mBottomBar.getLeft(),30, 0);
translateAnimation.setDuration(300);
translateAnimation.setInterpolator(new OvershootInterpolator(0.6f));
mBottomBar.startAnimation(translateAnimation);
translateAnimation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
mBottomBar.setVisibility(View.VISIBLE);
}
});
}
}
/**
* 隐藏浮动底部栏
*/
private void hideBottomBar() {
if (mBottomBar != null && mBottomBar.getVisibility() == View.VISIBLE) {
Animation translateAnimation = new TranslateAnimation(mBottomBar.getLeft(), mBottomBar.getLeft(), 0, 30);
translateAnimation.setDuration(300);
translateAnimation.setInterpolator(new OvershootInterpolator(0.6f));
mBottomBar.startAnimation(translateAnimation);
translateAnimation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
mBottomBar.setVisibility(View.GONE);
}
});
}
}
/**
* 滑动到底部时直接显示bottomView
* @param visibleItemCount
* @param totalItemCount
* @param firstVisibleItem
*/
private void showBottomViewOnBottom(int visibleItemCount, int totalItemCount, int firstVisibleItem) {
Log.d(TAG, "visible bottem item count:" + "firstVisibleItem:" + firstVisibleItem + "oldFirstVisibleItem:" + oldFirstVisibleItem + mBottomBar);
if(getLastVisiblePosition() == totalItemCount -1 && mCurrentScrollState != SCROLL_STATE_IDLE){
showBottomBar();
}
}
private Runnable showBottomBarRunnable = new Runnable() {
@Override
public void run() {
showBottomBar();
}
};
/**
* 将需要隐藏显示的view传入
*
* @param bottomBar
*/
public void setBottomBar(ViewGroup bottomBar) {
this.mBottomBar = bottomBar;
}
}4、主界面测试的Activity，MainActivity代码如下
public class MainActivity extends Activity {
private BottomFloatListView mBottomFloatListView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mBottomFloatListView = (BottomFloatListView)findViewById(R.id.listView) ;
mBottomFloatListView.setAdapter(new ArrayAdapter(this, android.R.layout.simple_expandable_list_item_1,getData()));
ViewGroup bottomView = (ViewGroup)findViewById(R.id.bottombar) ;
mBottomFloatListView.setBottomBar(bottomView);
}
private List getData(){
List data = new ArrayList();
for(int i = 0; i <100; i++) {
data.add("测试数据" + i);
}
return data;
}
}ViewGroup bottomView = (ViewGroup)findViewById(R.id.bottombar) ;
mBottomFloatListView.setBottomBar(bottomView);
将底部的bottomView传入到ListView中，就可以让ListView具有底部View自动隐藏和消失的功能。
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