在ListView上滑动显示Delete按钮 - 军军小站|张军博客

SwipeLayout
http://www.eoeandroid.com/thread-542698-1-1.html

实现listview滑动删除功能
http://www.devstore.cn/code/info/579.html

首先设置listView.setOnTouchListener(onTouchListener);

    
listView = (ListView) findViewById(R.id.listView);
listView.setOnItemClickListener(onItemClickListener);
listView.setOnTouchListener(onTouchListener);

然后实现onTouchListener

    
View.OnTouchListener onTouchListener = new View.OnTouchListener() {
		float x, y, ux, uy;
		@Override
		public boolean onTouch(View v, MotionEvent event) {
			// TODO Auto-generated method stub
			switch (event.getAction()) {
			case MotionEvent.ACTION_DOWN:
				x = event.getX();
				y = event.getY();
				break;
			case MotionEvent.ACTION_UP:
				ux = event.getX();
				uy = event.getY();
				index = ((ListView)v).pointToPosition((int) x, (int) y);//item的position
				int p2 = ((ListView)v).pointToPosition((int) ux, (int) uy);
				if (index == p2 && Math.abs(x - ux) > 20) {
					notifyDataSetChanged();
				}
				return false;
			}

			return false;
		}

	};

最后在Adapter中如下实现：

    
class ListViewAdapter extends BaseAdapter {



		public ListViewAdapter() {
		}

		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return orders.size();
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return orders.get(position);
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			ViewHodler hodler;
			if (convertView == null) {
				hodler = new ViewHodler();
				convertView = LayoutInflater.from(context).inflate(R.layout.simple_item_4_for_my_order, null);
				hodler.item_0 = (TextView) convertView.findViewById(R.id.item_0);
				hodler.item_1 = (TextView) convertView.findViewById(R.id.item_1);
				hodler.item_2 = (TextView) convertView.findViewById(R.id.item_2);
				hodler.item_3 = (Button) convertView.findViewById(R.id.item_3);
				hodler.item_4 = (TextView) convertView.findViewById(R.id.item_4);
				convertView.setTag(hodler);
			} else {
				hodler = (ViewHodler) convertView.getTag();
			}
			final Order instance = orders.get(position);

			hodler.item_0.setText(instance.getStoreName());
			hodler.item_1.setText("$"+instance.getPaidAmt()+" for "+instance.getMenuNum()+" items");
			hodler.item_2.setText(instance.getCreateTime());

			if(position==index){
				if(hodler.item_3.getVisibility()==View.VISIBLE){
					hodler.item_3.setVisibility(View.GONE);
					doAnimation(context, hodler.item_3, R.anim.push_right_out);
				}else{
					hodler.item_3.setVisibility(View.VISIBLE);
					doAnimation(context, hodler.item_3, R.anim.push_right_in);
				}
				
					hodler.item_3.setText("Delete");
					hodler.item_3.setOnClickListener(new View.OnClickListener(){
						@Override
						public void onClick(View v) {
							App.order=instance;
							startCommand(context, handler, App.COMMAND_DELETE_ORDER);
						}
					});
				
			}else{
				hodler.item_3.setVisibility(View.GONE);
			}

			
			return convertView;
		}

		class ViewHodler {
			TextView item_0;
			TextView item_1;
			TextView item_2;
			Button item_3;
			TextView item_4;
		}

	}

Adapter布局：

    
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="10dp" 
    android:descendantFocusability="blocksDescendants"
    >
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >
		<LinearLayout
	            android:layout_width="match_parent"
	            android:layout_height="wrap_content"
	            android:orientation="horizontal" >
	        <TextView
	            android:id="@+id/item_0"
	            android:layout_width="match_parent"
	            android:layout_height="wrap_content"
	            android:textColor="@color/white"
	            android:textSize="@dimen/font_middle"
	            android:textStyle="bold" 
	            android:layout_weight="1"
	            android:singleLine="true"
	            />
	        <TextView
                android:id="@+id/item_4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@color/white"
                android:textSize="@dimen/font_xsmall" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <TextView
                android:id="@+id/item_1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:textColor="@color/white"
                android:textSize="@dimen/font_xsmall" />

            <TextView
                android:id="@+id/item_2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@color/white"
                android:textSize="@dimen/font_xsmall" />
        </LinearLayout>
    </LinearLayout>

    <Button
        android:id="@+id/item_3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical|right"
        android:text="Delete"
        android:textColor="@color/white"
        android:textSize="@dimen/font_middle"
        android:visibility="gone" 
        android:background="@drawable/bg_btn_red"
        android:paddingLeft="10dp"
        android:paddingRight="10dp"
        android:paddingTop="5dp"
        android:paddingBottom="5dp"
        />
</FrameLayout>

2个动画文件R.anim.push_right_out，R.anim.push_right_in：

    
<set xmlns:android="http://schemas.android.com/apk/res/android">
	<translate android:fromXDelta="0" android:toXDelta="100%p" android:duration="300"/>
	<!-- 
	<alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="300" />
	 -->
</set>

<set xmlns:android="http://schemas.android.com/apk/res/android">
	<translate android:fromXDelta="100%p" android:toXDelta="0" android:duration="300"/>
	<!-- 
	<alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="300" />
	 -->
</set>

另一种手势滑动直接删除的例子：
http://download.csdn.net/detail/xiaanming/6790849

    
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewConfiguration;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Scroller;

public class SlideCutListView extends ListView {
	/**
	 * 当前滑动的ListView　position
	 */
	private int slidePosition;
	/**
	 * 手指按下X的坐标
	 */
	private int downY;
	/**
	 * 手指按下Y的坐标
	 */
	private int downX;
	/**
	 * 屏幕宽度
	 */
//	private int screenWidth;
	/**
	 * ListView的item
	 */
	private View itemView;
	/**
	 * 滑动类
	 */
	private Scroller scroller;
	private static final int SNAP_VELOCITY = 600;
	/**
	 * 速度追踪对象
	 */
	private VelocityTracker velocityTracker;
	/**
	 * 是否响应滑动，默认为不响应
	 */
	private boolean isSlide = false;
	/**
	 * 认为是用户滑动的最小距离
	 */
	private int mTouchSlop;
	/**
	 *  移除item后的回调接口
	 */
	private OnItemRemovedListener onItemRemovedListener;
	/**
	 * 用来指示item滑出屏幕的方向,向左或者向右,用一个枚举值来标记
	 */
	private SlideDirection removeDirection;

	// 滑动删除方向的枚举值
	public enum SlideDirection {
		RIGHT, LEFT;
	}


	public SlideCutListView(Context context) {
		this(context, null);
	}

	public SlideCutListView(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	public SlideCutListView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
//		screenWidth = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getWidth();
		scroller = new Scroller(context);
		mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
	}
	
	/**
	 * 分发事件，主要做的是判断点击的是那个item, 以及通过postDelayed来设置响应左右滑动事件
	 */
	@Override
	public boolean dispatchTouchEvent(MotionEvent event) {
		switch (event.getAction()) {
		case MotionEvent.ACTION_DOWN: {
			// 假如scroller滚动还没有结束，我们直接返回
			if (!scroller.isFinished()) {
				return super.dispatchTouchEvent(event);
			}
			addVelocityTracker(event);

			downX = (int) event.getX();
			downY = (int) event.getY();

			slidePosition = pointToPosition(downX, downY);

			// 无效的position, 不做任何处理
			if (slidePosition == AdapterView.INVALID_POSITION) {
				return super.dispatchTouchEvent(event);
			}

			// 获取我们点击的item view
			itemView = getChildAt(slidePosition - getFirstVisiblePosition());
			break;
		}
		case MotionEvent.ACTION_MOVE: {
			if (Math.abs(getXVelocity()) > SNAP_VELOCITY
					|| (Math.abs(event.getX() - downX) > mTouchSlop && Math
							.abs(event.getY() - downY) < mTouchSlop)) {
				isSlide = true;
			}
			break;
		}
		case MotionEvent.ACTION_UP:
			recycleVelocityTracker();
			break;
		}

		return super.dispatchTouchEvent(event);
	}

	/**
	 * 往右滑动，getScrollX()返回的是左边缘的距离，就是以View左边缘为原点到开始滑动的距离，所以向右边滑动为负值
	 */
	private void scrollRight() {
		removeDirection = SlideDirection.RIGHT;
		final int delta = (getWidth() + itemView.getScrollX());
		// 调用startScroll方法来设置一些滚动的参数，我们在computeScroll()方法中调用scrollTo来滚动item
		scroller.startScroll(itemView.getScrollX(), 0, -delta, 0,
				Math.abs(delta));
		postInvalidate(); // 刷新itemView
	}

	/**
	 * 向左滑动，根据上面我们知道向左滑动为正值
	 */
	private void scrollLeft() {
		removeDirection = SlideDirection.LEFT;
		final int delta = (getWidth() - itemView.getScrollX());
		// 调用startScroll方法来设置一些滚动的参数，我们在computeScroll()方法中调用scrollTo来滚动item
		scroller.startScroll(itemView.getScrollX(), 0, delta, 0,
				Math.abs(delta));
		postInvalidate(); // 刷新itemView
	}

	/**
	 * 根据手指滚动itemView的距离来判断是滚动到开始位置还是向左或者向右滚动
	 */
	private void scrollByDistanceX() {
		// 如果向左滚动的距离大于屏幕的三分之一，就让其删除
		if (itemView.getScrollX() >= getWidth() / 3) {
			scrollLeft();
		} else if (itemView.getScrollX() <= -getWidth() / 3) {
			scrollRight();
		} else {
			// 滚回到原始位置,为了偷下懒这里是直接调用scrollTo滚动
			itemView.scrollTo(0, 0);
		}

	}

	/**
	 * 处理我们拖动ListView item的逻辑
	 */
	@Override
	public boolean onTouchEvent(MotionEvent ev) {
		if (isSlide && slidePosition != AdapterView.INVALID_POSITION) {
			addVelocityTracker(ev);
			final int action = ev.getAction();
			int x = (int) ev.getX();
			switch (action) {
			case MotionEvent.ACTION_MOVE:
				int deltaX = downX - x;
				downX = x;

				// 手指拖动itemView滚动, deltaX大于0向左滚动，小于0向右滚
				itemView.scrollBy(deltaX, 0);
				break;
			case MotionEvent.ACTION_UP:
				int velocityX = getXVelocity();
				if (velocityX > SNAP_VELOCITY) {
					scrollRight();
				} else if (velocityX < -SNAP_VELOCITY) {
					scrollLeft();
				} else {
					scrollByDistanceX();
				}

				recycleVelocityTracker();
				// 手指离开的时候就不响应左右滚动
				isSlide = false;
				break;
			}

			return true; // 拖动的时候ListView不滚动
		}

		//否则直接交给ListView来处理onTouchEvent事件
		return super.onTouchEvent(ev);
	}

	@Override
	public void computeScroll() {
		// 调用startScroll的时候scroller.computeScrollOffset()返回true，
		if (scroller.computeScrollOffset()) {
			// 让ListView item根据当前的滚动偏移量进行滚动
			itemView.scrollTo(scroller.getCurrX(), scroller.getCurrY());
			
			postInvalidate();

			// 滚动动画结束的时候调用回调接口
			if (scroller.isFinished()) {
				if (onItemRemovedListener == null) {
					throw new NullPointerException("OnItemRemovedListener is null, we should called setOnItemRemovedListener()");
				}
				
				itemView.scrollTo(0, 0);
				onItemRemovedListener.onItemRemoved(removeDirection, slidePosition);
			}
		}
	}

	/**
	 * 添加用户的速度跟踪器
	 * 
	 * @param event
	 */
	private void addVelocityTracker(MotionEvent event) {
		if (velocityTracker == null) {
			velocityTracker = VelocityTracker.obtain();
		}
		velocityTracker.addMovement(event);
	}

	/**
	 * 移除用户速度跟踪器
	 */
	private void recycleVelocityTracker() {
		if (velocityTracker != null) {
			velocityTracker.recycle();
			velocityTracker = null;
		}
	}

	/**
	 * 获取X方向的滑动速度,大于0向右滑动，反之向左
	 * 
	 * @return
	 */
	private int getXVelocity() {
		velocityTracker.computeCurrentVelocity(1000);
		int velocity = (int) velocityTracker.getXVelocity();
		return velocity;
	}

	/**
	 * 设置滑动删除的回调接口
	 * @param removeListener
	 */
	public void setOnItemRemovedListener(OnItemRemovedListener onItemRemovedListener) {
		this.onItemRemovedListener = onItemRemovedListener;
	}
	
	/**
	 * 
	 * 当ListView item滑出屏幕，回调这个接口
	 * 我们需要在回调方法removeItem()中移除该Item,然后刷新ListView
	 * 
	 *
	 */
	public interface OnItemRemovedListener {
		public void onItemRemoved(SlideDirection direction, int position);
	}

}

用法：

    
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Toast;
import com.example.slidecutlistview.SlideCutListView.OnItemRemovedListener;
import com.example.slidecutlistview.SlideCutListView.SlideDirection;

public class MainActivity extends Activity implements OnItemRemovedListener{
	private SlideCutListView slideCutListView ;
	private ArrayAdapter<String> adapter;
	private List<String> datas = new ArrayList<String>();

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		init();
	}

	private void init() {
		slideCutListView = (SlideCutListView) findViewById(R.id.slideCutListView);
		slideCutListView.setOnItemRemovedListener(this);
		
		for(int i=0; i<40; i++){
			datas.add("item" + i); 
		}
		
		adapter = new ArrayAdapter<String>(this, R.layout.listview_item, R.id.list_item, datas);
		slideCutListView.setAdapter(adapter);
		
		slideCutListView.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				Toast.makeText(MainActivity.this, datas.get(position), Toast.LENGTH_SHORT).show();
			}
		});
	}

	@Override
	public void onItemRemoved(SlideDirection direction, int position) {
		adapter.remove(adapter.getItem(position));
		switch (direction) {
		case RIGHT:
			Toast.makeText(this, "position="+ position, Toast.LENGTH_SHORT).show();
			break;
		case LEFT:
			Toast.makeText(this, "position="+ position, Toast.LENGTH_SHORT).show();
			break;

		default:
			break;
		}
		
	}	
}

仿微信的删除，效果还可以，就是封装的不够，代码之间瓜葛太大：

实现listview中item滑动效果：Swipemenulistview
http://www.open-open.com/lib/view/open1430107254865.html

在ListView上滑动显示Delete按钮

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