之前一篇文章中介绍了微信滑动删除效果(Android 仿微信对话列表滑动删除效果),这一篇在其基础上实现QQ消息列表ListView滑动删除效果,大致原理差不多,这里就不细说了。
运行效果如下:
SwipeListView.java
package com.example.swipelistview.widget; import android.content.Context; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.widget.ListView; import android.widget.RelativeLayout; import com.example.swipelistview.R; public class SwipeListView extends ListView { private static final String TAG = SwipeListView.class.getSimpleName(); private boolean isShown; private View mPreItemView; private View mCurrentItemView; private float mFirstX; private float mFirstY; private boolean mIsHorizontal; public SwipeListView(Context context) { super(context); // TODO Auto-generated constructor stub } public SwipeListView(Context context, AttributeSet attrs) { super(context, attrs); // TODO Auto-generated constructor stub } public SwipeListView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); // TODO Auto-generated constructor stub } @Override public boolean onInterceptTouchEvent(MotionEvent ev) { float lastX = ev.getX(); float lastY = ev.getY(); switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: mIsHorizontal = false; mFirstX = lastX; mFirstY = lastY; int motionPosition = pointToPosition((int) mFirstX, (int) mFirstY); Log.e(TAG, "onInterceptTouchEvent----->ACTION_DOWN position=" + motionPosition); if (motionPosition >= 0) { View currentItemView = getChildAt(motionPosition - getFirstVisiblePosition()); mPreItemView = mCurrentItemView; mCurrentItemView = currentItemView; } break; case MotionEvent.ACTION_MOVE: float dx = lastX - mFirstX; float dy = lastY - mFirstY; if (Math.abs(dx) >= 5 && Math.abs(dy) >= 5) { return true; } break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: Log.i(TAG, "onInterceptTouchEvent----->ACTION_UP"); if (isShown && mPreItemView != mCurrentItemView) { Log.i(TAG, "1---> hiddenRight"); /** * 情况一: *
* 一个Item的右边布局已经显示, *
* 这时候点击任意一个item, 那么那个右边布局显示的item隐藏其右边布局 */ hiddenRight(mPreItemView); } break; } return super.onInterceptTouchEvent(ev); } @Override public boolean onTouchEvent(MotionEvent ev) { // TODO Auto-generated method stub float lastX = ev.getX(); float lastY = ev.getY(); switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: Log.i(TAG, "---->ACTION_DOWN"); break; case MotionEvent.ACTION_MOVE: float dx = lastX - mFirstX; float dy = lastY - mFirstY; mIsHorizontal = isHorizontalDirectionScroll(dx, dy); if (!mIsHorizontal) { break; } Log.i(TAG, "onTouchEvent ACTION_MOVE"); if (mIsHorizontal) { if (isShown && mPreItemView != mCurrentItemView) { Log.i(TAG, "2---> hiddenRight"); /** * 情况二: *
* 一个Item的右边布局已经显示, *
* 这时候左右滑动另外一个item,那个右边布局显示的item隐藏其右边布局 *
* 向左滑动只触发该情况,向右滑动还会触发情况五 */ hiddenRight(mPreItemView); } }else { if (isShown) { Log.i(TAG, "3---> hiddenRight"); /** * 情况三: *
* 一个Item的右边布局已经显示, *
* 这时候上下滚动ListView,那么那个右边布局显示的item隐藏其右边布局 */ hiddenRight(mPreItemView); } } break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: Log.i(TAG, "============ACTION_UP"); if (isShown) { Log.i(TAG, "4---> hiddenRight"); /** * 情况四: *
* 一个Item的右边布局已经显示, *
* 这时候左右滑动当前一个item,那个右边布局显示的item隐藏其右边布局 */ hiddenRight(mPreItemView); } if (mIsHorizontal) { if (mFirstX - lastX > 30) { showRight(mCurrentItemView); } else { Log.i(TAG, "5---> hiddenRight"); /** * 情况五: *
* 向右滑动一个item,且滑动的距离超过了右边View的宽度的一半,隐藏之。 */ hiddenRight(mCurrentItemView); } return true; } break; } return super.onTouchEvent(ev); } private void showRight(View rightView) { RelativeLayout rl_right=(RelativeLayout)rightView.findViewById(R.id.item_right); rl_right.setVisibility(View.VISIBLE); isShown = true; } private void hiddenRight(View rightView) { RelativeLayout rl_right=(RelativeLayout)rightView.findViewById(R.id.item_right); rl_right.setVisibility(View.GONE); isShown = false; } /** * @param dx * @param dy * @return judge if can judge scroll direction */ private boolean isHorizontalDirectionScroll(float dx, float dy) { boolean mIsHorizontal = true; if (Math.abs(dx) > 30 && Math.abs(dx) > 2 * Math.abs(dy)) { mIsHorizontal = true; System.out.println("mIsHorizontal---->" + mIsHorizontal); } else if (Math.abs(dy) > 30 && Math.abs(dy) > 2 * Math.abs(dx)) { mIsHorizontal = false; System.out.println("mIsHorizontal---->" + mIsHorizontal); } return mIsHorizontal; } }
SwipeAdapter.java
package com.example.swipelistview.adapter;
import java.util.List;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.example.swipelistview.R;
import com.example.swipelistview.entity.WXMessage;
public class SwipeAdapter extends BaseAdapter {
/**
* 上下文对象
*/
private Context mContext = null;
private List data;
/**
* @param mainActivity
*/
public SwipeAdapter(Context ctx,List data) {
mContext = ctx;
this.data = data;
}
@Override
public int getCount() {
// return 100;
return data.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item, parent, false);
holder = new ViewHolder();
holder.item_left = (RelativeLayout)convertView.findViewById(R.id.item_left);
holder.item_right = (RelativeLayout)convertView.findViewById(R.id.item_right);
holder.iv_icon = (ImageView) convertView.findViewById(R.id.iv_icon);
holder.tv_title = (TextView)convertView.findViewById(R.id.tv_title);
holder.tv_msg = (TextView)convertView.findViewById(R.id.tv_msg);
holder.tv_time = (TextView)convertView.findViewById(R.id.tv_time);
holder.item_right_txt = (TextView)convertView.findViewById(R.id.item_right_txt);
convertView.setTag(holder);
} else {// 有直接获得ViewHolder
holder = (ViewHolder)convertView.getTag();
}
Log.i("SwipeAdapter", "getView position="+position);
WXMessage msg = data.get(position);
holder.tv_title.setText(msg.getTitle());
holder.tv_msg.setText(msg.getMsg());
holder.tv_time.setText(msg.getTime());
holder.iv_icon.setImageResource(msg.getIcon_id());
holder.item_right.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mListener != null) {
mListener.onRightItemClick(v, position);
}
}
});
return convertView;
}
static class ViewHolder {
RelativeLayout item_left;
RelativeLayout item_right;
TextView tv_title;
TextView tv_msg;
TextView tv_time;
ImageView iv_icon;
TextView item_right_txt;
}
/**
* 单击事件监听器
*/
private onRightItemClickListener mListener = null;
public void setOnRightItemClickListener(onRightItemClickListener listener){
mListener = listener;
}
public interface onRightItemClickListener {
void onRightItemClick(View v, int position);
}
}
Demo下载地址:http://download.csdn.net/detail/fx_sky/6913747