如何在android项目中里ListView隐藏底部View
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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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文章名称:如何在android项目中里ListView隐藏底部View
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