創建一個Recyclerview列表item佈局,自定義容器:
SlidButtonView.java
public class SlidButtonView extends HorizontalScrollView {
private static final String TAG = "SlidButtonView";
private TextView lTextView_Delete;//刪除按鈕
private int lScrollWith;//橫向滾動範圍
private boolean first = false; //標記第一次進入獲取刪除按鈕控件
public SlidButtonView(Context context) {
this(context, null);
}
public SlidButtonView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SlidButtonView(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);
//第一次進入時獲取刪除控件
if (!first) {
lTextView_Delete = findViewById(R.id.tv_delete);
first = true;//修改標記
}
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
//默認隱藏刪除按鈕
if (changed) {
this.scrollTo(0, 0);
//獲取水平滾動條可以滾動的範圍,也就是右側刪除按鈕的寬度
lScrollWith = lTextView_Delete.getWidth();
}
}
//手勢判斷
@Override
public boolean onTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
Log.d(TAG, "onTouchEvent: ");
changeScrollx();
return true;
}
return super.onTouchEvent(ev);
}
//根據滑動距離判斷是否顯示刪除按鈕
private void changeScrollx() {
//觸摸滑動的距離大於刪除按鈕的一半時
if (getScrollX() >= (lScrollWith / 2)) {
//顯示刪除按鈕
this.smoothScrollTo(lScrollWith, 0);
} else {
//隱藏刪除按鈕
this.smoothScrollTo(0, 0);
}
}
}
item佈局:
<?xml version="1.0" encoding="utf-8"?>
<com.xiebin.myapplication.view.SlidButtonView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_marginBottom="1dp"
android:background="@android:color/white">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!--刪除按鈕-->
<TextView
android:id="@+id/tv_delete"
android:layout_width="80dp"
android:layout_height="match_parent"
android:layout_toRightOf="@+id/layout_content"
android:background="@drawable/btn_click_red_bg"
android:gravity="center"
android:text="刪除"
android:textColor="@android:color/white"/>
<!--行的佈局文件-->
<RelativeLayout
android:id="@+id/layout_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical">
<!--圖標-->
<ImageView
android:id="@+id/img"
android:layout_width="50dp"
android:layout_height="50dp"
android:background="@drawable/icon_1"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_toRightOf="@+id/img"
android:gravity="center_vertical"
android:orientation="vertical">
<TextView
android:id="@+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="123"
android:textColor="@android:color/black"
android:textSize="15sp"/>
<TextView
android:id="@+id/info"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="2dp"
android:singleLine="true"
android:text="123"
android:textColor="@android:color/black"
android:textSize="10sp"/>
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
</com.xiebin.myapplication.view.SlidButtonView>
Recycler適配器:
Adapter.java
public class Adapter extends RecyclerView.Adapter<Adapter.MyViewHolder> {
//圖標數組
private int[] icons = {
R.drawable.icon_1, R.drawable.icon_2, R.drawable.icon_3,
R.drawable.icon_4, R.drawable.icon_5, R.drawable.icon_6, R.drawable.icon_7,
R.drawable.icon_8, R.drawable.icon_9};
//名字數組
private int[] names = {
R.string.name1, R.string.name2, R.string.name3, R.string.name4, R.string.name5,
R.string.name6, R.string.name7, R.string.name8, R.string.name9};
//信息數組
private int[] infos = {
R.string.info1, R.string.info2, R.string.info3, R.string.info4, R.string.info5,
R.string.info6, R.string.info7, R.string.info8, R.string.info9};
private Context lContent;//定義上下文
//集合
private List<Integer> listIcon = new ArrayList<>();
private List<Integer> listName = new ArrayList<>();
private List<Integer> listInfo = new ArrayList<>();
public Adapter(Context lContent) {
this.lContent = lContent;
//設置菜單行數與行內圖標、名稱、信息
for (int i = 0; i < 11; i++) {
listIcon.add(icons[I]);
listName.add(names[I]);
listInfo.add(infos[I]);
}
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
//獲取列表中每行的佈局文件
View view = LayoutInflater.from(lContent).inflate(R.layout.layout_item, parent, false);
return new MyViewHolder(view);
}
//設置列表中行所顯示的內容
@Override
public void onBindViewHolder(@NonNull final MyViewHolder holder, int position) {
//設置圖標
holder.img.setBackgroundResource(listIcon.get(position));
//設置名稱
holder.name.setText(listName.get(position));
//設置信息
holder.info.setText(listInfo.get(position));
//設置內容寬度爲屏幕的寬度
holder.layout_content.getLayoutParams().width = Utils.getScreenWidth(lContent);
//刪除按鈕的方法
holder.btn_delete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int n = holder.getLayoutPosition();//獲取要刪除行的位置
removeData(n);//刪除列表中指定的行
}
});
}
//返回行的總數
@Override
public int getItemCount() {
return listIcon.size();
}
//刪除列表行中信息的方法
public void removeData(int position){
listIcon.remove(position);//刪除圖標
listName.remove(position);//刪除行中名字
listInfo.remove(position);//刪除信息
notifyItemRemoved(position);//刪除行
}
class MyViewHolder extends RecyclerView.ViewHolder {
public TextView btn_delete;
public TextView name, info;//名字與信息
public ImageView img;//圖標
public ViewGroup layout_content;//圖標與信息佈局
//獲取控件
public MyViewHolder(View itemView) {
super(itemView);
name = itemView.findViewById(R.id.name);
info = itemView.findViewById(R.id.info);
img = itemView.findViewById(R.id.img);
layout_content = itemView.findViewById(R.id.layout_content);
btn_delete = itemView.findViewById(R.id.tv_delete);
}
}
}