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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:
<?xml version="1.0" encoding="UTF-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/button_layout" android:layout_width="fill_parent" android:layout_height="50dp" android:background="#cbcbcb" android:gravity="center_vertical" android:orientation="horizontal" > <Button android:layout_height="40dp" android:layout_width="wrap_content" android:layout_weight="1" android:text="价格" /> <Button android:layout_height="40dp" android:layout_width="wrap_content" android:layout_weight="1" android:text="好评" /> <Button android:layout_height="40dp" android:layout_width="wrap_content" android:layout_weight="1" android:text="筛选" /> </LinearLayout>main.xml如下
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <com.example.BottomFloatListView.BottomFloatListView android:id="@+id/listView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:fadingEdge="none" /> <include android:id="@+id/bottombar" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" layout="@layout/bottom_view" > </include> </RelativeLayout>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; 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); } 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"); } } } 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); } }); } } 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); } }); } } 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(); } }; public void setBottomBar(ViewGroup bottomBar) { this.mBottomBar = bottomBar; } }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<String>(this, android.R.layout.simple_expandable_list_item_1,getData())); ViewGroup bottomView = (ViewGroup)findViewById(R.id.bottombar) ; mBottomFloatListView.setBottomBar(bottomView); } private List<String> getData(){ List<String> data = new ArrayList<String>(); 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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