Android如何实现房贷计算器

发布时间:2022-05-21 08:36:22 作者:iii
来源:亿速云 阅读:204

今天小编给大家分享一下Android如何实现房贷计算器的相关知识点,内容详细,逻辑清晰,相信大部分人都还太了解这方面的知识,所以分享这篇文章给大家参考一下,希望大家阅读完这篇文章后有所收获,下面我们一起来了解一下吧。

fangdai(activity)

package com.example.myapplication_one;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

public class fangdai extends AppCompatActivity {
    //声明用到的所有控件
    Spinner spinner1;
    Spinner spinner2;
    EditText row1edit;
    EditText row2edit;
    Button total;
    RadioGroup radioGroup;
    CheckBox checkBox1;
    CheckBox checkBox2;
    EditText row4edit;
    EditText row5edit;
    Button detail;
    TextView totalcal;
    TextView alldetail;
    private void initSpinner(){
        //初始化控件
        spinner1= (Spinner) findViewById(R.id.sp1);
        spinner2= (Spinner) findViewById(R.id.sp2);
        //建立数据源
        String[] years=getResources().getStringArray(R.array.years);
        String[] baserates=getResources().getStringArray(R.array.baserate);
        //声明一个下拉列表的数组适配器并绑定数据源
        ArrayAdapter<String> yearAdapter=new ArrayAdapter<String>(this,R.layout.support_simple_spinner_dropdown_item,years);
        ArrayAdapter<String> baserateAdapter=new ArrayAdapter<String>(this,R.layout.support_simple_spinner_dropdown_item,baserates);
        //绑定Adapter到控件
        spinner1.setAdapter(yearAdapter);
        spinner2.setAdapter(baserateAdapter);
        //设置默认选择第一项
        spinner1.setSelection(0);
        spinner2.setSelection(0);
        //设置标题
        spinner1.setPrompt("请选择贷款年限");
        spinner2.setPrompt("请选择基准利率");
    }

    //声明下列函数中要用到的变量
    double intotal,backtotal,extra,pertime;//贷款总额,还款总额,利息,每月还款总额
    int month;//月份
    String buytotal;//购房总额
    String percent;//贷款百分比
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fangdai);
        //初始化控件
        initSpinner();
        row1edit= (EditText) findViewById(R.id.row1edit);
        row2edit= (EditText) findViewById(R.id.row2edit);
        total= (Button) findViewById(R.id.totalcal);
        radioGroup= (RadioGroup) findViewById(R.id.radiogroup);
        checkBox1= (CheckBox) findViewById(R.id.check1);
        checkBox2= (CheckBox) findViewById(R.id.check2);
        totalcal= (TextView) findViewById(R.id.showtotal);
        detail= (Button) findViewById(R.id.detail);
        alldetail= (TextView) findViewById(R.id.alldetail);
        row4edit= (EditText) findViewById(R.id.row4label);
        row5edit= (EditText) findViewById(R.id.row5label);

        //给第一个计算按钮添加点击监听
        total.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                buytotal=row1edit.getText().toString();
                percent=row2edit.getText().toString();
                if(TextUtils.isEmpty(buytotal)||TextUtils.isEmpty(percent))//判断前两个输入框是否非空
                {
                    Toast.makeText(fangdai.this,"购房总价和按揭部分信息填写完整",Toast.LENGTH_LONG).show();
                }else if(fangdaitext.isNum(buytotal)==false||fangdaitext.isNum(percent)==false){//判断输入的是否是数字
                    Toast.makeText(fangdai.this,"包含不合法的输入信息",Toast.LENGTH_LONG).show();
                } else if(Double.parseDouble(percent)>100){//判断百分比部分输入是否大于100%
                    Toast.makeText(fangdai.this,"按揭部分不能超过100%",Toast.LENGTH_LONG).show();
                } else if(fangdaitext.isNum(buytotal)&&fangdaitext.isNum(percent))
                {
                    intotal=(Double.parseDouble(buytotal)*Double.parseDouble(percent)*0.01);
                    totalcal.setText("您的贷款总额为"+String.format("%.2f",intotal)+"万元");
                }
            }
        });

        detail.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //first,second为商贷和公积金贷所填数值
                String first=row4edit.getText().toString();
                String second=row5edit.getText().toString();
                //firstrate和secondrate为商贷和公积金的年利率
                double firstrate=Double.parseDouble(spinner2.getSelectedItem().toString().substring(20,24))*0.01;
                double secondrate=Double.parseDouble(spinner2.getSelectedItem().toString().substring(31,35))*0.01;
                //获取下拉列表的年份求得月份
                String year=spinner1.getSelectedItem().toString();
                month=Integer.parseInt(year.substring(0,year.length()-1))*12;
                //两种贷款的月利率
                double firstmonthrate=firstrate/12;
                double secondmonthrate=secondrate/12;
                if(totalcal.getText().toString().equals("其中贷款部分为:***万")){//判断是否计算过贷款总额
                    Toast.makeText(fangdai.this,"请先计算贷款总额",Toast.LENGTH_LONG).show();
                }else if(row1edit.getText().toString().equals(buytotal)==false||row2edit.getText().toString().equals(percent)==false){//监听贷款总额和按揭部分数值是否发生变化
                    Toast.makeText(fangdai.this,"检查到您的购房总价或按揭部分数据更改,请重新计算贷款总额",Toast.LENGTH_LONG).show();
                } else if(checkBox1.isChecked()==false&&checkBox2.isChecked()==false)//监听勾选的多选框
                {
                    Toast.makeText(fangdai.this,"请勾选贷款种类",Toast.LENGTH_LONG).show();
                }else if(checkBox1.isChecked()&&checkBox2.isChecked()==false){
                    //等额本息贷款算法
                    if(radioGroup.getCheckedRadioButtonId()==R.id.btn1){
                        pertime=intotal*firstmonthrate*Math.pow((1+firstmonthrate),month)/(Math.pow(1+firstmonthrate,month)-1);
                        backtotal=pertime*month;
                        extra=backtotal-intotal;
                        alldetail.setText("您的贷款总额为"+String.format("%.2f",intotal)+"万元\n还款总额为"+String.format("%.2f",backtotal)+"万元\n其中利息总额为"+String.format("%.2f",extra)+"万元\n还款总时间为"+month+"月\n每月还款金额为"+String.format("%.2f",pertime*10000)+"元");
                    }else{//等额本金贷款算法
                        double[] array=new double[month];
                        double sum=0;
                        for(int i=0;i<month;i++)
                        {
                            array[i]=intotal/month+(intotal-sum)*firstmonthrate;
                            sum+=array[i];
                        }
                        String text="";
                        for(int i=0;i<month;i++){
                            text+="\n第"+(i+1)+"个月应还金额为:"+String.format("%.2f",array[i]*10000);
                        }
                        backtotal=sum;
                        extra=backtotal-intotal;
                        alldetail.setText("您的贷款总额为"+String.format("%.2f",intotal)+"万元\n还款总额为"+String.format("%.2f",backtotal)+"万元\n其中利息总额为"+String.format("%.2f",extra)+"万元\n还款总时间为"+month+"月\n每月还款金额如下:"+text);
                    }

                }else if(checkBox1.isChecked()==false&&checkBox2.isChecked()){
                    if(radioGroup.getCheckedRadioButtonId()==R.id.btn1){
                        pertime=intotal*secondmonthrate*Math.pow((1+secondmonthrate),month)/(Math.pow(1+secondmonthrate,month)-1);
                        backtotal=pertime*month;
                        extra = backtotal - intotal;
                        alldetail.setText("您的贷款总额为" + String.format("%.2f",intotal) + "万元\n还款总额为"+String.format("%.2f",backtotal)+"万元\n其中利息总额为"+String.format("%.2f",extra)+"万元\n还款总时间为"+month+"月\n每月还款金额为"+String.format("%.2f",pertime*10000)+"元");
                    }else{
                        double[] array=new double[month];
                        double sum=0;
                        for(int i=0;i<month;i++)
                        {
                            array[i]=intotal/month+(intotal-sum)*secondmonthrate;
                            sum+=array[i];
                        }
                        String text="";
                        for(int i=0;i<month;i++){
                            text+="\n第"+(i+1)+"个月应还金额为:"+String.format("%.2f",array[i]*10000)+"元";
                        }
                        backtotal=sum;
                        extra=backtotal-intotal;
                        alldetail.setText("您的贷款总额为"+String.format("%.2f",intotal)+"万元\n还款总额为"+String.format("%.2f",backtotal)+"万元\n其中利息总额为"+String.format("%.2f",extra)+"万元\n还款总时间为"+month+"月\n每月还款金额如下:"+text);
                    }
                }else if(checkBox1.isChecked()&&checkBox2.isChecked()){
                    if(radioGroup.getCheckedRadioButtonId()==R.id.btn1){
                        if(TextUtils.isEmpty(first)||TextUtils.isEmpty(second)){
                            Toast.makeText(fangdai.this,"请将空信息填写完整",Toast.LENGTH_LONG).show();
                        }else if(fangdaitext.isNum(first)==false||fangdaitext.isNum(second)==false){
                            Toast.makeText(fangdai.this,"包含不合法的输入信息",Toast.LENGTH_LONG).show();
                        }else if(Double.parseDouble(first)+Double.parseDouble(second)!=Double.parseDouble(String.format("%.2f",intotal))){
                            Toast.makeText(fangdai.this,"填写的两项贷款总额不等于初始贷款额度,请重新填写",Toast.LENGTH_LONG).show();
                        }else{
                            double p1=Double.parseDouble(first);
                            double p2=Double.parseDouble(second);
                            double pertime1=p1*firstmonthrate*Math.pow((1+firstmonthrate),month)/(Math.pow(1+firstmonthrate,month)-1);
                            double pertime2=p2*secondmonthrate*Math.pow((1+secondmonthrate),month)/(Math.pow(1+secondmonthrate,month)-1);
                            pertime=pertime1+pertime2;
                            backtotal=pertime*month;
                            extra=backtotal-intotal;
                            alldetail.setText("您的贷款总额为" + String.format("%.2f",intotal) + "万元\n还款总额为"+String.format("%.2f",backtotal)+"万元\n其中利息总额为"+String.format("%.2f",extra)+"万元\n还款总时间为"+month+"月\n每月还款金额为"+String.format("%.2f",pertime*10000)+"元");
                        }
                    }else{
                        if(first.equals("请输入商业贷款总额(单位万)")||second.equals("请输入公积金贷款总额(单位万)")){
                            Toast.makeText(fangdai.this,"请将空信息填写完整",Toast.LENGTH_LONG).show();
                        }else if(fangdaitext.isNum(first)==false||fangdaitext.isNum(second)==false){
                            Toast.makeText(fangdai.this,"包含不合法的输入信息",Toast.LENGTH_LONG).show();
                        }else if(Double.parseDouble(first)+Double.parseDouble(second)!=Double.parseDouble(String.format("%.2f",intotal))){
                            Toast.makeText(fangdai.this,"填写的两项贷款总额不等于初始贷款额度,请重新填写",Toast.LENGTH_LONG).show();
                        }else{
                            double p1=Double.parseDouble(first);
                            double p2=Double.parseDouble(second);
                            double[] array1=new double[month];
                            double[] array2=new double[month];
                            double sum1=0,sum2=0;
                            for(int i=0;i<month;i++)
                            {
                                array1[i]=p1/month+(p1-sum1)*firstmonthrate;
                                array2[i]=p2/month+(p2-sum2)*secondmonthrate;
                                Toast.makeText(fangdai.this,array1[i]+" "+array2[i],Toast.LENGTH_LONG);
                                sum1+=array1[i];
                                sum2+=array2[i];
                            }
                            String text="";
                            for(int i=0;i<month;i++){
                                text+="\n第"+(i+1)+"个月应还金额为:"+String.format("%.2f",(array1[i]+array2[i])*10000)+"元";
                            }
                            backtotal=sum1+sum2;
                            extra=backtotal-intotal;
                            alldetail.setText("您的贷款总额为"+String.format("%.2f",intotal)+"万元\n还款总额为"+String.format("%.2f",backtotal)+"万元\n其中利息总额为"+String.format("%.2f",extra)+"万元\n还款总时间为"+month+"月\n每月还款金额如下:"+text);
                        }
                    }
                }
            }
        });

        row1edit.addTextChangedListener(new TextWatcher() {
            int oldlength=0;
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {//强制用户不能输入非数字和小数点之外的字符
                int length = charSequence.length();
                if (length > oldlength) {
                    char newchar = charSequence.charAt(i);
                    if ((newchar < '0' && newchar > '9') && newchar != '.') {
                        if (i != length - 1)
                            row1edit.setText(charSequence.subSequence(0, i).toString() + charSequence.subSequence(i + 1, length).toString());
                        else
                            row1edit.setText(charSequence.subSequence(0, length - 1));
                    }
                }
                oldlength=length;
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });

        row2edit.addTextChangedListener(new TextWatcher() {
            int oldlength=0;
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                int length=charSequence.length();
                if(length>oldlength) {
                    char newchar = charSequence.charAt(i);
                    if ((newchar < '0' && newchar > '9') && newchar != '.') {
                        if (i != length - 1)
                            row2edit.setText(charSequence.subSequence(0, i).toString() + charSequence.subSequence(i + 1, length).toString());
                        else
                            row2edit.setText(charSequence.subSequence(0, length - 1));
                    }
                }
                oldlength=length;
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });

        row4edit.addTextChangedListener(new TextWatcher() {
            int oldlength=0;
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                int length=charSequence.length();
                if(length>oldlength) {
                    char newchar = charSequence.charAt(i);
                    if ((newchar < '0' && newchar > '9') && newchar != '.') {
                        if (i != length - 1)
                            row4edit.setText(charSequence.subSequence(0, i).toString() + charSequence.subSequence(i + 1, length).toString());
                        else
                            row4edit.setText(charSequence.subSequence(0, length - 1));
                    }
                }
                oldlength=length;
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });

        row5edit.addTextChangedListener(new TextWatcher() {
            int oldlength=0;
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                int length=charSequence.length();
                if(length>oldlength) {
                    char newchar = charSequence.charAt(i);
                    if ((newchar < '0' && newchar > '9') && newchar != '.') {
                        if (i != length - 1)
                            row5edit.setText(charSequence.subSequence(0, i).toString() + charSequence.subSequence(i + 1, length).toString());
                        else
                            row5edit.setText(charSequence.subSequence(0, length - 1));
                    }
                }
                oldlength=length;
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });
    }

}

fangdaitext(activity)

package com.example.myapplication_one;
public class fangdaitext {
    public static boolean isNum(String string){
        int flag=0;
        if(string.charAt(0)=='0'&&string.charAt(1)!='.')
            return false;
        if(string.charAt(0)=='.')
            return false;
        for(int i=0;i<string.length();i++)
        {
            if((string.charAt(i)<'0'||string.charAt(i)>'9')&&string.charAt(i)!='.')
                return false;
            else if(string.charAt(i)=='.')
            {
                flag++;
                if(flag>1)
                    return false;
            }
        }
        return true;
    }
}

fangdai.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="16dp"
    android:focusableInTouchMode="true"
    android:focusable="true"
    tools:context="com.example.myapplication_one.fangdai">
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/relativeLayout1">
                <TextView
                    android:id="@+id/row1label"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="购房总价:"
                    android:layout_centerVertical="true"
                    android:textSize="18sp"
                    />
                <EditText
                    android:id="@+id/row1edit"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:hint="请输入购房总价(单位万)"
                    android:singleLine="true"
                    android:textSize="16dp"
                    android:background="@drawable/edittext_style"
                    android:padding="5dp"
                    android:gravity="right"
                    android:layout_toRightOf="@+id/row1label"
                    android:layout_toLeftOf="@+id/row1endlabel"
                    android:inputType="numberDecimal"/>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="万"
                    android:textSize="18sp"
                    android:layout_marginLeft="10dp"
                    android:layout_centerVertical="true"
                    android:layout_alignParentEnd="true"
                    android:id="@+id/row1endlabel"
                    android:layout_alignParentRight="true" />
            </RelativeLayout>
            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/relativeLayout2"
                android:layout_below="@+id/relativeLayout1"
                android:layout_marginTop="20dp">
                <TextView
                    android:id="@+id/row2label"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="按揭部分:"
                    android:layout_centerVertical="true"
                    android:textSize="18sp"
                    />
                <EditText
                    android:id="@+id/row2edit"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:hint="请输入按揭百分比"
                    android:singleLine="true"
                    android:textSize="16dp"
                    android:background="@drawable/edittext_style"
                    android:padding="5dp"
                    android:gravity="right"
                    android:layout_toRightOf="@+id/row2label"
                    android:layout_toLeftOf="@+id/row2endlabel"
                    android:inputType="numberDecimal"/>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text=" %"
                    android:textSize="18sp"
                    android:layout_marginLeft="10dp"
                    android:layout_centerVertical="true"
                    android:layout_alignParentEnd="true"
                    android:id="@+id/row2endlabel"
                    android:layout_alignParentRight="true" />
            </RelativeLayout>

            <Button
                android:id="@+id/totalcal"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/relativeLayout2"
                android:layout_marginTop="15dp"
                android:background="@drawable/btn_style"
                android:text="计算贷款总额" />
            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="其中贷款部分为:***万"
                android:layout_below="@+id/totalcal"
                android:layout_marginTop="10dp"
                android:textSize="16sp"
                android:id="@+id/showtotal"/>
            <RelativeLayout
                android:id="@+id/relativeLayout3"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/showtotal"
                android:layout_marginTop="10dp">
                <TextView
                    android:id="@+id/row3label"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="还款方式:"
                    android:textSize="16sp"
                    android:layout_centerVertical="true"/>
                <RadioGroup
                    android:id="@+id/radiogroup"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_toRightOf="@+id/row3label"
                    android:orientation="horizontal">
                    <RadioButton
                        android:id="@+id/btn1"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="等额本息"
                        android:checked="true"/>
                    <RadioButton
                        android:id="@+id/btn2"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="等额本金"
                        android:layout_marginLeft="10dp"/>
                </RadioGroup>
            </RelativeLayout>
            <RelativeLayout
                android:id="@+id/relativeLayout4"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/relativeLayout3">
                <CheckBox
                    android:id="@+id/check1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="商贷:    "/>
                <EditText
                    android:id="@+id/row4label"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:hint="请输入商业贷款总额(单位万)"
                    android:singleLine="true"
                    android:textSize="16dp"
                    android:background="@drawable/edittext_style"
                    android:padding="5dp"
                    android:gravity="right"
                    android:layout_toRightOf="@+id/check1"
                    android:layout_toLeftOf="@+id/row4endlabel"
                    android:inputType="numberDecimal"/>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="万"
                    android:textSize="18sp"
                    android:layout_marginLeft="10dp"
                    android:layout_centerVertical="true"
                    android:layout_alignParentEnd="true"
                    android:id="@+id/row4endlabel"/>
            </RelativeLayout>
            <RelativeLayout
                android:id="@+id/relativeLayout5"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/relativeLayout4"
                android:layout_marginTop="5dp">
                <CheckBox
                    android:id="@+id/check2"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="公积金:"/>
                <EditText
                    android:id="@+id/row5label"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:hint="请输入公积金贷款总额(单位万)"
                    android:singleLine="true"
                    android:textSize="16dp"
                    android:background="@drawable/edittext_style"
                    android:padding="5dp"
                    android:gravity="right"
                    android:layout_toRightOf="@+id/check2"
                    android:layout_toLeftOf="@+id/row5endlabel"
                    android:inputType="numberDecimal"/>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="万"
                    android:textSize="18sp"
                    android:layout_marginLeft="10dp"
                    android:layout_centerVertical="true"
                    android:layout_alignParentEnd="true"
                    android:id="@+id/row5endlabel" />
            </RelativeLayout>
            <RelativeLayout
                android:id="@+id/relativeLayout6"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/relativeLayout5"
                android:layout_marginTop="10dp">
                <TextView
                    android:id="@+id/row6label"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="贷款年限:"
                    android:textSize="16sp"
                    android:layout_centerVertical="true"/>
                <Spinner
                    android:id="@+id/sp1"
                    android:layout_centerVertical="true"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:spinnerMode="dialog"
                    android:layout_toRightOf="@+id/row6label">
                </Spinner>
            </RelativeLayout>
            <RelativeLayout
                android:id="@+id/relativeLayout7"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/relativeLayout6"
                android:layout_marginTop="10dp">
                <TextView
                    android:id="@+id/row7label"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="基准利率:"
                    android:layout_centerVertical="true"
                    android:textSize="16sp"/>
                <Spinner
                    android:id="@+id/sp2"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:spinnerMode="dialog"
                    android:layout_centerVertical="true"
                    android:layout_toRightOf="@+id/row7label">
                </Spinner>
            </RelativeLayout>
            <Button
                android:id="@+id/detail"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/relativeLayout7"
                android:layout_marginTop="15dp"
                android:background="@drawable/btn_style"
                android:text="计算还款明细"/>
            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="还款总额为:***万\n其中利息总额为:***万\n月供(每月还款额)为:***"
                android:layout_below="@+id/detail"
                android:layout_marginTop="10dp"
                android:textSize="16sp"
                android:id="@+id/alldetail"/>
        </RelativeLayout>
    </ScrollView>
</RelativeLayout>

edittext_style.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true">
        <shape>
            <corners android:radius="5dp"/>
            <stroke android:width="1dp"
                android:color="#00DDFF"/>
        </shape>
    </item>
    <item android:state_focused="false">
        <shape>
            <corners android:radius="5dp"/>
            <stroke android:width="1dp"
                android:color="#000000"/>
        </shape>
    </item>
</selector>

btn_style.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true">
        <shape>
            <solid android:color="#808080"/>
            <corners android:radius="2dp"/>
            <stroke android:width="1dp"
                android:color="@color/teal_200"/>
        </shape>
    </item>
    <item android:state_pressed="false">
        <shape>
            <solid android:color="#33E3F3"/>
            <corners android:radius="2dp"/>
            <stroke android:width="1dp"
                android:color="#07AC78"/>
        </shape>
    </item>
</selector>

dimens.xml

<resources>
    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>
</resources>

Android如何实现房贷计算器

Android如何实现房贷计算器

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