Android自定义收银键盘(原创)

Android自定义收银键盘(原创)
效果图:
Android自定义收银键盘(原创)_第1张图片

源码地址(github)

我的公众号:
Android自定义收银键盘(原创)_第2张图片

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.

你可能感兴趣的:(Andorid干货)