Android自定义收银键盘(原创)
Android自定义收银键盘(原创)
效果图：
源码地址（github）
我的公众号:
最近开发项目需要自定义收银键盘，网上查了查都感觉不是太好，于是自己写了一个，自定义的键盘主要是根据GridView+EditText结合来写的。
1.GridView如下：
2.然后自己写了一个PayKeyAdapter，设置了键盘的文字和类型。
package com.example.qzs.keyboard_cash;
import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class PayKeyAdapter extends BaseAdapter {
private Context mContext;
private Context context;
public PayKeyAdapter(Context context) {
this.context=context;
}
private String[] texts = {
//九宫格图片下方文字的设置
"1",
"2",
"3",
"清空",
"4",
"5",
"6",
"←",
"7",
"8",
"9",
"=",
".",
"0",
"+",
"收款",
};
private String[] types = {
//存放在text的tag中
"num",
"num",
"num",
"cancel",
"num",
"num",
"num",
"back",
"num",
"num",
"num",
"equal",
"point",
"num",
"plus",
"pay",
};
@Override
public int getCount() {
return texts.length;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View view, ViewGroup viewgroup) {
ImgTextWrapper wrapper;
if(view==null) {
wrapper = new ImgTextWrapper();
LayoutInflater inflater = LayoutInflater.from(context);
view = inflater.inflate(R.layout.grid_menu_item_pay, null);
view.setTag(wrapper);
view.setPadding(3, 3, 3, 3); //每格的间距
} else {
wrapper = (ImgTextWrapper)view.getTag();
}
wrapper.textView = (TextView)view.findViewById(R.id.GridTextView);
wrapper.textView.setText(texts[position]);
wrapper.textView.setTag(types[position]);
if(types[position].equals("back")
|| types[position].equals("cancel")
|| types[position].equals("equal")){
wrapper.textView.setBackgroundResource(R.drawable.btn_cell_delete);
}else if(types[position].equals("pay")){
wrapper.textView.setBackgroundResource(R.drawable.btn_cell_pay);
wrapper.textView.setTextColor(Color.WHITE);
}
// wrapper.textView = (TextView)view.findViewById(R.id.GridItemText);
// wrapper.textView.setText(texts[position]);
// wrapper.textView.setTag(payTypes[position]);
return view;
}
class ImgTextWrapper {
ImageView imageView;
TextView textView;
}
}
3.核心的语法在GridView的setOnItemClickListener事件.
gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView adapterView, View view, int i, long l) {
String keyType = view.findViewById(R.id.GridTextView).getTag().toString();
String textValue = ((TextView)view.findViewById(R.id.GridTextView)).getText().toString();
String editText = editMemberAmount.getText().toString();
if(keyType.equals("num")){
//数字键
try{
String orgValue = numList.get(numIndex);
if(editText.equals("0")){
editMemberAmount.setText(textValue);
}else{
//小数点最多只能后两位
if(orgValue.equals("0.00")){
orgValue=textValue;
numList.set(numIndex, textValue);
editMemberAmount.setText(textValue);
return;
}
if(orgValue.lastIndexOf(".")!=-1 && orgValue.lastIndexOf(".")=18){
Toast.makeText(getApplicationContext(),"一次输入算式无法超过18个字符",Toast.LENGTH_SHORT).show();
return;
}
int numLen = orgValue.length();
if(orgValue.lastIndexOf(".")!=-1){
numLen = orgValue.lastIndexOf(".")+1;
}
if(numLen==7){
Toast.makeText(getApplicationContext(),"收款金额不能超过7位数",Toast.LENGTH_SHORT).show();
}else{
numList.set(numIndex, orgValue+textValue);
editMemberAmount.setText(editText+textValue);
}
}
}
}catch(Exception e){
numIndex=0;
numList=new ArrayList();
numList.add(textValue);
editMemberAmount.setText(textValue);
}
}
if(keyType.equals("back")){
//退格
try{
if(editText.lastIndexOf("+") == editText.length()-1){
//最后为加则减少一位
numList.set(numIndex,"");
numIndex--;
editMemberAmount.setText(editText.substring(0,editText.length()-1));
}else{
String orgValue = numList.get(numIndex);
if(!orgValue.equals("")){
numList.set(numIndex, orgValue.substring(0,orgValue.length()-1));
}
if(editText.equals("0")||editText.length()==1){
editMemberAmount.setText("0.00");
numList.set(numIndex,"0.00");
}else{
editMemberAmount.setText(editText.substring(0,editText.length()-1));
}
}
}catch(Exception e){
numIndex=0;
numList=new ArrayList();
numList.add("0");
editMemberAmount.setText("");
}
}
if(keyType.equals("point")){
//小数点
try{
String orgValue = numList.get(numIndex);
if(orgValue.lastIndexOf(".")!=-1){
Toast.makeText(getApplicationContext(),"已存在小数点",Toast.LENGTH_SHORT).show();
}else{
if(editText.lastIndexOf("+") == editText.length()-1){
//最后为加则补0
numList.set(numIndex, orgValue+"0"+textValue);
editMemberAmount.setText(editText+"0"+textValue);
}else{
numList.set(numIndex, orgValue+textValue);
editMemberAmount.setText(editText+textValue);
}
}
}catch(Exception e){
numIndex=0;
numList=new ArrayList();
numList.add("0.");
editMemberAmount.setText("0.");
}
}
if(keyType.equals("plus")){
//加
try{
if(editText.lastIndexOf("+") == editText.length()-1){
//最后为加则不处理
}else{
numIndex++;
numList.add("");
editMemberAmount.setText(editText+textValue);
}
}catch(Exception e){
numIndex=0;
numList=new ArrayList();
numList.add("0");
editMemberAmount.setText("");
}
}
if(keyType.equals("cancel")){
//清空
//确认是否清空
AlertDialog.Builder clearBuilder = new AlertDialog.Builder(MainActivity.this);// 添加按钮的单击事件
clearBuilder.setMessage("是否确认要清空当前收款数据?")
. // 设置确定按钮
setPositiveButton("确定",
new DialogInterface.OnClickListener() {
// 单击事件
public void onClick(
DialogInterface dialog,
int which) { // 设置TextView文本
clearInputData();
}
})
. // 设置取消按钮
setNegativeButton("取消",
new DialogInterface.OnClickListener() {
public void onClick(
DialogInterface dialog,
int which) {
}
}); // 创建对话框
AlertDialog ad = clearBuilder.create(); // 显示对话框
ad.show();
}
if(keyType.equals("equal")||keyType.equals("pay")){
//等于
try{
double sum = 0.0;
for(String value :numList){
if(!value.equals("")){
sum+= Double.parseDouble(value)+0.00d;
}
}
String sumStr=new DecimalFormat("##.##").format(sum);
if(!sumStr.contains(".")){
sumStr+=".00";
}
if(sumStr.substring(sumStr.lastIndexOf(".")+1).length()<2){
sumStr+="0";
}
numIndex=0;
numList=new ArrayList();
numList.add(sumStr);
editMemberAmount.setText(sumStr);
}catch(Exception e){
numIndex=0;
numList=new ArrayList();
numList.add("0");
editMemberAmount.setText("");
}
}
if(keyType.equals("pay")){
//收款
if (editMemberAmount.getText().toString().length() < 1||editMemberAmount.getText().toString().equals("0.00") || editMemberAmount.getText().toString().equals("0")) {
Toast.makeText(getApplicationContext(),"请输入金额",Toast.LENGTH_SHORT).show();
return;
}else {
Toast.makeText(getApplicationContext(),"收款成功",Toast.LENGTH_SHORT).show();
}
}
}
}); 4.具体的完整项目请访问我的github，地址在上方已贴出.