Android RecyclerView 滑动删除例子
效果图
1.自定义Item容器View,SlidingButtonView.java
package com.android.mx.myapplication;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.HorizontalScrollView;
import android.widget.TextView;
/**
* Created by Administrator on 2016-11-11.
*/
public class SlidingButtonView extends HorizontalScrollView {
private TextView mTextView_Delete;
private int mScrollWidth;
private IonSlidingButtonListener mIonSlidingButtonListener;
private Boolean isOpen = false;
private Boolean once = false;
public SlidingButtonView(Context context) {
this(context, null);
}
public SlidingButtonView(Context context, AttributeSet attrs) {
this(context, attrs,0);
}
public SlidingButtonView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.setOverScrollMode(OVER_SCROLL_NEVER);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if(!once){
mTextView_Delete = (TextView) findViewById(R.id.tv_delete);
once = true;
}
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
if(changed){
this.scrollTo(0,0);
//获取水平滚动条可以滑动的范围，即右侧按钮的宽度
mScrollWidth = mTextView_Delete.getWidth();
Log.i("asd", "mScrollWidth:" + mScrollWidth);
}
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
int action = ev.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
mIonSlidingButtonListener.onDownOrMove(this);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
changeScrollx();
return true;
default:
break;
}
return super.onTouchEvent(ev);
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);
mTextView_Delete.setTranslationX(l - mScrollWidth);
}
/**
* 按滚动条被拖动距离判断关闭或打开菜单
*/
public void changeScrollx(){
if(getScrollX() >= (mScrollWidth/2)){
this.smoothScrollTo(mScrollWidth, 0);
isOpen = true;
mIonSlidingButtonListener.onMenuIsOpen(this);
}else{
this.smoothScrollTo(0, 0);
isOpen = false;
}
}
/**
* 打开菜单
*/
public void openMenu()
{
if (isOpen){
return;
}
this.smoothScrollTo(mScrollWidth, 0);
isOpen = true;
mIonSlidingButtonListener.onMenuIsOpen(this);
}
/**
* 关闭菜单
*/
public void closeMenu()
{
if (!isOpen){
return;
}
this.smoothScrollTo(0, 0);
isOpen = false;
}
public void setSlidingButtonListener(IonSlidingButtonListener listener){
mIonSlidingButtonListener = listener;
}
public interface IonSlidingButtonListener{
void onMenuIsOpen(View view);
void onDownOrMove(SlidingButtonView slidingButtonView);
}
}
2.定义每个Item的XML，layout_item.xml
3定义Adapter，Adapter.java
package com.android.mx.myapplication;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
/**
* Created by Administrator on 2016-11-11.
*/
public class Adapter extends RecyclerView.Adapter implements SlidingButtonView.IonSlidingButtonListener {
private Context mContext;
private IonSlidingViewClickListener mIDeleteBtnClickListener;
private List mDatas = new ArrayList();
private SlidingButtonView mMenu = null;
public Adapter(Context context) {
mContext = context;
mIDeleteBtnClickListener = (IonSlidingViewClickListener) context;
for (int i = 0; i < 10; i++) {
mDatas.add(i + "");
}
}
@Override
public int getItemCount() {
return mDatas.size();
}
@Override
public void onBindViewHolder(final MyViewHolder holder, int position) {
holder.textView.setText(mDatas.get(position));
//设置内容布局的宽为屏幕宽度
holder.layout_content.getLayoutParams().width = Utils.getScreenWidth(mContext);
holder.textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//判断是否有删除菜单打开
if (menuIsOpen()) {
closeMenu();//关闭菜单
} else {
int n = holder.getLayoutPosition();
mIDeleteBtnClickListener.onItemClick(v, n);
}
}
});
holder.btn_Delete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int n = holder.getLayoutPosition();
mIDeleteBtnClickListener.onDeleteBtnCilck(v, n);
}
});
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup arg0, int arg1) {
View view = LayoutInflater.from(mContext).inflate(R.layout.layout_item, arg0, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
public void addData(int position) {
mDatas.add(position, "添加项");
notifyItemInserted(position);
}
public void removeData(int position) {
mDatas.remove(position);
notifyItemRemoved(position);
}
/**
* 删除菜单打开信息接收
*/
@Override
public void onMenuIsOpen(View view) {
mMenu = (SlidingButtonView) view;
}
/**
* 滑动或者点击了Item监听
*
* @param slidingButtonView
*/
@Override
public void onDownOrMove(SlidingButtonView slidingButtonView) {
if (menuIsOpen()) {
if (mMenu != slidingButtonView) {
closeMenu();
}
}
}
/**
* 关闭菜单
*/
public void closeMenu() {
mMenu.closeMenu();
mMenu = null;
}
/**
* 判断是否有菜单打开
*/
public Boolean menuIsOpen() {
if (mMenu != null) {
return true;
}
return false;
}
public interface IonSlidingViewClickListener {
void onItemClick(View view, int position);
void onDeleteBtnCilck(View view, int position);
}
class MyViewHolder extends RecyclerView.ViewHolder {
public TextView btn_Delete;
public TextView textView;
public ViewGroup layout_content;
public MyViewHolder(View itemView) {
super(itemView);
btn_Delete = (TextView) itemView.findViewById(R.id.tv_delete);
textView = (TextView) itemView.findViewById(R.id.text);
layout_content = (ViewGroup) itemView.findViewById(R.id.layout_content);
((SlidingButtonView) itemView).setSlidingButtonListener(Adapter.this);
}
}
} 4定义相关的Utils，Utils.java
package com.android.mx.myapplication;
import android.content.Context;
import android.util.DisplayMetrics;
import android.view.WindowManager;
public class Utils {
//屏幕宽度（像素）
public static int getScreenWidth(Context context) {
WindowManager wm = (WindowManager) context
.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
return outMetrics.widthPixels;
}
}
5使用效果，MainActivity.java，activity_main.xml
MainActivity.java
package com.android.mx.myapplication;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
public class MainActivity extends AppCompatActivity implements Adapter.IonSlidingViewClickListener {
private final String TAG = "test";
private RecyclerView mRecyclerView;
private Adapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
setAdapter();
}
private void initView() {
mRecyclerView = (RecyclerView) findViewById(R.id.recyclerview);
}
private void setAdapter() {
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mRecyclerView.setAdapter(mAdapter = new Adapter(this));
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
}
@Override
public void onItemClick(View view, int position) {
Log.i(TAG, "点击项：" + position);
}
@Override
public void onDeleteBtnCilck(View view, int position) {
Log.i(TAG, "删除项：" + position);
mAdapter.removeData(position);
}
}activity_main.xml
在build.gradle中应用
compile 'com.android.support:appcompat-v7:22.2.1' compile 'com.android.support:recyclerview-v7:22.2.1'