android实现QQ微信侧滑删除效果

import android.util.AttributeSet; 
import android.util.Log; 
import android.util.TypedValue; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.LinearLayout; 
import android.widget.RelativeLayout; 
import android.widget.Scroller; 
import android.widget.TextView; 
 
/**  
 * SlideView 继承自LinearLayout  
 */  
public class SlideView extends LinearLayout {  
  
  private static final String TAG = "SlideView";  
  
  private Context mContext;  
  
  // 用来放置所有view的容器  
  private LinearLayout mViewContent;  
  
  // 用来放置内置view的容器，比如删除 按钮  
  private RelativeLayout mHolder;  
  
  // 弹性滑动对象，提供弹性滑动效果  
  private Scroller mScroller;  
  
  // 滑动回调接口，用来向上层通知滑动事件  
  private OnSlideListener mOnSlideListener;  
  
  // 内置容器的宽度 单位：dp  
  private int mHolderWidth = 120;  
  
  // 分别记录上次滑动的坐标  
  private int mLastX = 0;  
  private int mLastY = 0;  
  
  // 用来控制滑动角度，仅当角度a满足如下条件才进行滑动：tan a = deltaX / deltaY > 2  
  private static final int TAN = 2;  
  
  public interface OnSlideListener {  
    // SlideView的三种状态：开始滑动，打开，关闭  
    public static final int SLIDE_STATUS_OFF = 0;  
    public static final int SLIDE_STATUS_START_SCROLL = 1;  
    public static final int SLIDE_STATUS_ON = 2;  
  
    public void onSlide(View view, int status);  
  }  
  
  public SlideView(Context context) {  
    super(context);  
    initView();  
  }  
  
  public SlideView(Context context, AttributeSet attrs) {  
    super(context, attrs);  
    initView();  
  }  
  
  private void initView() {  
    mContext = getContext();  
    // 初始化弹性滑动对象  
    mScroller = new Scroller(mContext);  
    // 设置其方向为横向  
    setOrientation(LinearLayout.HORIZONTAL);  
    // 将slide_view_merge加载进来  
    View.inflate(mContext, R.layout.slide_view_merge, this);  
    mViewContent = (LinearLayout) findViewById(R.id.view_content);  
    mHolderWidth = Math.round(TypedValue.applyDimension(  
        TypedValue.COMPLEX_UNIT_DIP, mHolderWidth, getResources()  
            .getDisplayMetrics()));  
  }  
  
  // 设置按钮的内容，也可以设置图标啥的，我没写  
  public void setButtonText(CharSequence text) {  
    ((TextView) findViewById(R.id.delete)).setText(text);  
  }  
  
  // 将view加入到ViewContent中  
  public void setContentView(View view) {  
    mViewContent.addView(view);  
  }  
  
  // 设置滑动回调  
  public void setOnSlideListener(OnSlideListener onSlideListener) {  
    mOnSlideListener = onSlideListener;  
  }  
  
  // 将当前状态置为关闭  
  public void shrink() {  
    if (getScrollX() != 0) {  
      this.smoothScrollTo(0, 0);  
    }  
  }  
  
  // 根据MotionEvent来进行滑动，这个方法的作用相当于onTouchEvent  
  // 如果你不需要处理滑动冲突，可以直接重命名，照样能正常工作  
  public void onRequireTouchEvent(MotionEvent event) {  
    int x = (int) event.getX();  
    int y = (int) event.getY();  
    int scrollX = getScrollX();  
    Log.d(TAG, "x=" + x + " y=" + y);  
  
    switch (event.getAction()) {  
    case MotionEvent.ACTION_DOWN: {  
      if (!mScroller.isFinished()) {  
        mScroller.abortAnimation();  
      }  
      if (mOnSlideListener != null) {  
        mOnSlideListener.onSlide(this,  
            OnSlideListener.SLIDE_STATUS_START_SCROLL);  
      }  
      break;  
    }  
    case MotionEvent.ACTION_MOVE: {  
      int deltaX = x - mLastX;  
      int deltaY = y - mLastY;  
      if (Math.abs(deltaX) < Math.abs(deltaY) * TAN) {  
        // 滑动不满足条件，不做横向滑动  
        break;  
      }  
  
      // 计算滑动终点是否合法，防止滑动越界  
      int newScrollX = scrollX - deltaX;  
      if (deltaX != 0) {  
        if (newScrollX < 0) {  
          newScrollX = 0;  
        } else if (newScrollX > mHolderWidth) {  
          newScrollX = mHolderWidth;  
        }  
        this.scrollTo(newScrollX, 0);  
      }  
      break;  
    }  
    case MotionEvent.ACTION_UP: {  
      int newScrollX = 0;  
      // 这里做了下判断，当松开手的时候，会自动向两边滑动，具体向哪边滑，要看当前所处的位置  
      if (scrollX - mHolderWidth * 0.75 > 0) {  
        newScrollX = mHolderWidth;  
      }  
      // 慢慢滑向终点  
      this.smoothScrollTo(newScrollX, 0);  
      // 通知上层滑动事件  
      if (mOnSlideListener != null) {  
        mOnSlideListener.onSlide(this,  
            newScrollX == 0 ? OnSlideListener.SLIDE_STATUS_OFF  
                : OnSlideListener.SLIDE_STATUS_ON);  
      }  
      break;  
    }  
    default:  
      break;  
    }  
  
    mLastX = x;  
    mLastY = y;  
  }  
  
  private void smoothScrollTo(int destX, int destY) {  
    // 缓慢滚动到指定位置  
    int scrollX = getScrollX();  
    int delta = destX - scrollX;  
    // 以三倍时长滑向destX，效果就是慢慢滑动  
    mScroller.startScroll(scrollX, 0, delta, 0, Math.abs(delta) * 3);  
    invalidate();  
  }  
  
  @Override  
  public void computeScroll() {  
    if (mScroller.computeScrollOffset()) {  
      scrollTo(mScroller.getCurrX(), mScroller.getCurrY());  
      postInvalidate();  
    }  
  }  
  
}

<?xml version="1.0" encoding="utf-8"?> 
<merge xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" > 
 
  <LinearLayout 
    android:id="@+id/view_content" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="horizontal" > 
  </LinearLayout> 
 
  <RelativeLayout 
    android:id="@+id/holder" 
    android:layout_width="120dp" 
    android:layout_height="match_parent" 
    android:clickable="true" 
    android:background="@drawable/holder_bg"> 
 
    <TextView 
      android:id="@+id/delete" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:drawableLeft="@drawable/del_icon_normal" 
      android:layout_centerInParent="true" 
      android:gravity="center" 
      android:textColor="@color/floralwhite" 
      android:text="删除" /> 
  </RelativeLayout> 
 
</merge>

import com.ryg.slideview.MainActivity.MessageItem; 
 
import android.content.Context; 
import android.util.AttributeSet; 
import android.util.Log; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.ListView; 
 
public class ListViewCompat extends ListView { 
 
  private static final String TAG = "ListViewCompat"; 
 
  private SlideView mFocusedItemView; 
 
  public ListViewCompat(Context context) { 
    super(context); 
  } 
 
  public ListViewCompat(Context context, AttributeSet attrs) { 
    super(context, attrs); 
  } 
 
  public ListViewCompat(Context context, AttributeSet attrs, int defStyle) { 
    super(context, attrs, defStyle); 
  } 
 
  public void shrinkListItem(int position) { 
    View item = getChildAt(position); 
 
    if (item != null) { 
      try { 
        ((SlideView) item).shrink(); 
      } catch (ClassCastException e) { 
        e.printStackTrace(); 
      } 
    } 
  } 
 
  @Override  
  public boolean onTouchEvent(MotionEvent event) {  
    switch (event.getAction()) {  
    case MotionEvent.ACTION_DOWN: {  
      int x = (int) event.getX();  
      int y = (int) event.getY();  
      //根据坐标获取item所在的行  
      int position = pointToPosition(x, y);  
      Log.e(TAG, "postion=" + position);  
      if (position != INVALID_POSITION) {  
        //得到当前点击行的数据从而取出当前行的item。  
        //可能有人怀疑，为什么要这么干？为什么不用getChildAt(position)？  
        //因为ListView会进行缓存，如果你不这么干，有些行的view你是得不到的。  
        MessageItem data = (MessageItem) getItemAtPosition(position);  
        mFocusedItemView = data.slideView;  
        Log.e(TAG, "FocusedItemView=" + mFocusedItemView);  
      }  
    }  
    default:  
      break;  
    }  
    
    //向当前点击的view发送滑动事件请求，其实就是向SlideView发请求  
    if (mFocusedItemView != null) {  
      mFocusedItemView.onRequireTouchEvent(event);  
    }  
    
    return super.onTouchEvent(event);  
  }  
 
}

import java.util.ArrayList; 
import java.util.List; 
 
import com.ryg.slideview.SlideView.OnSlideListener; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.BaseAdapter; 
import android.widget.ImageView; 
import android.widget.ListView; 
import android.widget.TextView; 
 
public class MainActivity extends Activity implements OnItemClickListener,  
OnClickListener, OnSlideListener {  
 
private static final String TAG = "MainActivity";  
 
private ListViewCompat mListView;  
 
private List<MessageItem> mMessageItems = new ArrayList<MainActivity.MessageItem>();  
 
private SlideAdapter mSlideAdapter;  
 
// 上次处于打开状态的SlideView  
private SlideView mLastSlideViewWithStatusOn;  
 
@Override  
protected void onCreate(Bundle savedInstanceState) {  
super.onCreate(savedInstanceState);  
setContentView(R.layout.activity_main);  
initView();  
}  
 
private void initView() {  
mListView = (ListViewCompat) findViewById(R.id.list);  
 
for (int i = 0; i < 20; i++) {  
  MessageItem item = new MessageItem();  
  if (i % 2 == 0) {  
    item.iconRes = R.drawable.default_qq_avatar;  
    item.title = "腾讯新闻";  
    item.msg = "天津大爆炸：河北大爆炸";  
    item.time = "晚上18:00";  
  } else {  
    item.iconRes = R.drawable.wechat_icon;  
    item.title = "微信团队";  
    item.msg = "欢迎你使用微信";  
    item.time = "10月01日";  
  }  
  mMessageItems.add(item);  
}  
mSlideAdapter = new SlideAdapter();  
mListView.setAdapter(mSlideAdapter);  
mListView.setOnItemClickListener(this);  
}  
 
//listview 的适配器 
private class SlideAdapter extends BaseAdapter {  
 
private LayoutInflater mInflater;  
 
SlideAdapter() {  
  super();  
  mInflater = getLayoutInflater();  
}  
 
@Override  
public int getCount() {  
  return mMessageItems.size();  
}  
 
@Override  
public Object getItem(int position) {  
  return mMessageItems.get(position);  
}  
 
@Override  
public long getItemId(int position) {  
  return position;  
}  
 
@Override  
public View getView(int position, View convertView, ViewGroup parent) {  
  ViewHolder holder;  
  SlideView slideView = (SlideView) convertView;  
  if (slideView == null) {  
    // 这里是我们的item  
    View itemView = mInflater.inflate(R.layout.list_item, null);  
 
    slideView = new SlideView(MainActivity.this);  
    // 这里把item加入到slideView  
    slideView.setContentView(itemView);  
    // 下面是做一些数据缓存  
    holder = new ViewHolder(slideView);  
    slideView.setOnSlideListener(MainActivity.this);  
    slideView.setTag(holder);  
  } else {  
    holder = (ViewHolder) slideView.getTag();  
  }  
  MessageItem item = mMessageItems.get(position);  
  item.slideView = slideView;  
  item.slideView.shrink();  
 
  holder.icon.setImageResource(item.iconRes);  
  holder.title.setText(item.title);  
  holder.msg.setText(item.msg);  
  holder.time.setText(item.time);  
  holder.deleteHolder.setOnClickListener(MainActivity.this);  
 
  return slideView;  
}  
 
}  
 
public class MessageItem {  
public int iconRes;  
public String title;  
public String msg;  
public String time;  
public SlideView slideView;  
}  
 
private static class ViewHolder {  
public ImageView icon;  
public TextView title;  
public TextView msg;  
public TextView time;  
public ViewGroup deleteHolder;  
 
ViewHolder(View view) {  
  icon = (ImageView) view.findViewById(R.id.icon);  
  title = (TextView) view.findViewById(R.id.title);  
  msg = (TextView) view.findViewById(R.id.msg);  
  time = (TextView) view.findViewById(R.id.time);  
  deleteHolder = (ViewGroup) view.findViewById(R.id.holder);  
}  
}  
 
@Override  
public void onItemClick(AdapterView<?> parent, View view, int position,  
  long id) {  
// 这里处理ListItem的点击事件  
Log.e(TAG, "onItemClick position=" + position);  
}  
 
@Override  
public void onSlide(View view, int status) {  
// 如果当前存在已经打开的SlideView，那么将其关闭  
if (mLastSlideViewWithStatusOn != null  
    && mLastSlideViewWithStatusOn != view) {  
  mLastSlideViewWithStatusOn.shrink();  
}  
// 记录本次处于打开状态的view  
if (status == SLIDE_STATUS_ON) {  
  mLastSlideViewWithStatusOn = (SlideView) view;  
}  
}  
 
@Override  
public void onClick(View v) {  
// 这里处理删除按钮的点击事件，可以删除对话  
if (v.getId() == R.id.holder) {  
  int position = mListView.getPositionForView(v);  
  if (position != ListView.INVALID_POSITION) {  
    mMessageItems.remove(position);  
    mSlideAdapter.notifyDataSetChanged();  
  }  
  Log.e(TAG, "onClick v=" + v);  
}  
}

<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" > 
 
  <com.ryg.slideview.ListViewCompat 
    android:id="@+id/list" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="#fff4f7f9" 
    android:cacheColorHint="#00000000" 
    android:divider="#dddbdb" 
    android:dividerHeight="1.0px" 
    android:drawSelectorOnTop="false" 
    android:listSelector="@android:color/transparent" 
    android:scrollbars="none" /> 
 
</LinearLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  xmlns:tools="http://schemas.android.com/tools" 
  android:layout_width="match_parent" 
  android:layout_height="58dp" 
  android:background="@drawable/list_item_bg" 
  android:descendantFocusability="blocksDescendants" 
  android:gravity="center_vertical" 
  android:paddingBottom="5dp" 
  android:paddingLeft="10dp" 
  android:paddingRight="10dp" 
  android:paddingTop="5dp" > 
 
  <ImageView 
    android:id="@+id/icon" 
    android:layout_width="50dp" 
    android:layout_height="50dp" 
    android:layout_marginRight="5dp" 
    android:src="@drawable/wechat_icon" /> 
 
  <TextView 
    android:id="@+id/title" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_toRightOf="@id/icon" 
    android:textColor="@color/black" 
    android:textSize="15sp" /> 
 
  <TextView 
    android:id="@+id/msg" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignBottom="@id/icon" 
    android:layout_alignLeft="@id/title" 
    android:textColor="@color/grey" /> 
 
  <TextView 
    android:id="@+id/time" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentRight="true" 
    android:layout_alignTop="@id/title" 
    android:textColor="@color/grey" /> 
 
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
 
  <item android:drawable="@color/dimgrey" android:state_pressed="true"></item> 
  <item android:drawable="@color/dimgrey" android:state_focused="true"></item> 
  <item android:drawable="@color/dimgrey" android:state_selected="true"></item> 
  <item android:drawable="@color/gray" android:state_enabled="true"></item> 
  <item android:drawable="@color/gray" android:state_enabled="false"></item> 
 
</selector>

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
 
  <item android:drawable="@drawable/item_point_bg" android:state_pressed="true"></item> 
  <item android:drawable="@drawable/item_point_bg" android:state_focused="true"></item> 
  <item android:drawable="@drawable/item_point_bg" android:state_selected="true"></item> 
  <item android:drawable="@android:color/transparent" android:state_enabled="true"></item> 
  <item android:drawable="@android:color/transparent" android:state_enabled="false"></item> 
 
</selector>

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