類比手機QQ滑動刪除訊息

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package com.example.srolltest;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.util.DisplayMetrics;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnTouchListener;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.HorizontalScrollView;import android.widget.ListView;import android.widget.TextView;public class MainActivity extends Activity {    private ListView listView;    private Myadapter adapter;    private List<String> datas;    private int screenWidth;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        listView = (ListView) findViewById(R.id.listView);        DisplayMetrics outMetrics = new DisplayMetrics();        getWindowManager().getDefaultDisplay().getMetrics(outMetrics);        screenWidth = outMetrics.widthPixels;        initDatas();        adapter = new Myadapter();        listView.setAdapter(adapter);    }    private void initDatas() {        // TODO Auto-generated method stub        datas = new ArrayList<String>();        for (int i = 0; i < 20; i++) {            datas.add("刪除我吧,刪除我吧" + i);        }    }    class Myadapter extends BaseAdapter {        @Override        public int getCount() {            // TODO Auto-generated method stub            return datas.size();        }        @Override        public Object getItem(int position) {            // TODO Auto-generated method stub            return datas.get(position);        }        @Override        public long getItemId(int position) {            // TODO Auto-generated method stub            return position;        }        @Override        public View getView(final int position, View convertView, ViewGroup parent) {            // TODO Auto-generated method stub            final ViewHolder viewHolder;            if (convertView == null) {                convertView = LayoutInflater.from(MainActivity.this).inflate(                        R.layout.item_main, null);                viewHolder = new ViewHolder();                viewHolder.horizontalScrollView = (HorizontalScrollView) convertView.findViewById(R.id.horizontalScrollView);                viewHolder.tvContexTextView = (TextView) convertView.findViewById(R.id.tv_context);                viewHolder.btnDelete = (Button) convertView.findViewById(R.id.btn_delete);                viewHolder.toTop = (Button) convertView.findViewById(R.id.btn_toTop);                convertView.setTag(viewHolder);            } else {                viewHolder = (ViewHolder) convertView.getTag();            }            viewHolder.tvContexTextView.setText(datas.get(position));            viewHolder.tvContexTextView.setWidth(screenWidth);            if (viewHolder.horizontalScrollView.getScrollX() > 0) {                viewHolder.horizontalScrollView.smoothScrollTo(0, 0);            }            convertView.setOnTouchListener(new OnTouchListener() {                                @Override                public boolean onTouch(View v, MotionEvent event) {                    switch (event.getAction()) {                    case MotionEvent.ACTION_UP:                        int actionWidth = viewHolder.btnDelete.getWidth()+viewHolder.toTop.getWidth();                        int scrollX =viewHolder.horizontalScrollView.getScrollX();                        if(scrollX>actionWidth/2){                            viewHolder.horizontalScrollView.smoothScrollTo(actionWidth, 0);                        }else {                            viewHolder.horizontalScrollView.smoothScrollTo(0, 0);                        }                        return true;                    }                    return false;                }            });            viewHolder.tvContexTextView.setOnClickListener(new OnClickListener() {                @Override                public void onClick(View v) {                    // TODO Auto-generated method stub                    notifyDataSetChanged();                }            });            viewHolder.btnDelete.setOnClickListener(new OnClickListener() {                                @Override                public void onClick(View v) {                    datas.remove(position);                    notifyDataSetChanged();                }            });            viewHolder.toTop.setOnClickListener(new OnClickListener() {                                @Override                public void onClick(View v) {                    String temp = datas.get(0);                    datas.set(0, datas.get(position));                    datas.set(position, temp);                    notifyDataSetChanged();                                    }            });            return convertView;        }        class ViewHolder {            HorizontalScrollView horizontalScrollView;            TextView tvContexTextView;            Button btnDelete;            Button toTop;        }    }}

activity_main.xml

<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"    android:orientation="vertical" >    <ListView        android:id="@+id/listView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:fastScrollEnabled="true" /></LinearLayout>

item_main.xml

<?xml version="1.0" encoding="utf-8"?><HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/horizontalScrollView"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="#8492B4"    android:scrollbars="none" >    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="match_parent"        android:orientation="horizontal" >        <TextView            android:id="@+id/tv_context"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:gravity="center" />        <Button            android:id="@+id/btn_delete"            android:layout_width="wrap_content"            android:layout_height="match_parent"            android:background="#33ff0000"            android:text="刪除" />        <Button            android:id="@+id/btn_toTop"            android:layout_width="wrap_content"            android:layout_height="match_parent"            android:background="#3300ff00"            android:text="置頂" />    </LinearLayout></HorizontalScrollView>

類比手機QQ滑動刪除訊息