Android Studio实现简单计算器开发
更新时间:2022年05月20日 14:56:04 作者:echo_千
这篇文章主要为大家详细介绍了Android Studio实现简单计算器开发,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
本文实例为大家分享了Android Studio实现简单计算器开的具体代码,供大家参考,具体内容如下
效果展示:
路径和文件:
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.calculator"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
MainActivity.java
package com.example.calculator; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import androidx.appcompat.app.AppCompatActivity; import java.lang.reflect.Method; import java.math.BigDecimal; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private StringBuilder show_equation=new StringBuilder();//显示运算式 private ArrayList calculate_equation;//计算式 private int signal=0;//为0 时表示刚输入状态;为1 时表示当前在输出结果上继续输入 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //初始化 show_equation=new StringBuilder(); calculate_equation=new ArrayList<>(); Button zero=(Button)findViewById(R.id.zero); Button one=(Button)findViewById(R.id.one); Button two=(Button)findViewById(R.id.two); Button three=(Button)findViewById(R.id.three); Button four=(Button)findViewById(R.id.four); Button five=(Button)findViewById(R.id.five); Button six=(Button)findViewById(R.id.six); Button seven=(Button)findViewById(R.id.seven); Button eight=(Button)findViewById(R.id.eight); Button nine=(Button)findViewById(R.id.nine); Button cls=(Button)findViewById(R.id.cls); Button div=(Button)findViewById(R.id.div); Button mul=(Button)findViewById(R.id.mul); Button backspace=(Button)findViewById(R.id.Backspace); Button sub=(Button)findViewById(R.id.sub); Button add=(Button)findViewById(R.id.add); final Button equal=(Button)findViewById(R.id.equal); final Button point=(Button)findViewById(R.id.spot); final EditText result=(EditText)findViewById(R.id.result); result.setCursorVisible(true); disableShowInput(result); //点击文本框时光标始终在文本末尾 result.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { result.setSelection(result.getText().length()); } }); zero.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v){ if(!(show_equation.toString().equals("0"))){ if(signal==0){ show_equation.append("0"); //显示运算式 result.setText(show_equation); //将光标定位到文本末尾 result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); show_equation.append("0"); result.setText(show_equation); result.setSelection(result.getText().length()); signal=0; } } } }); //接下来1到9每个控件依次进行此设置 //保证若是在结果上进行输入时清除结果然后显示点击的数字 //若是正常输入则直接在运算式末尾加上点击的数字并显示 one.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(signal==0){ show_equation.append("1"); result.setText(show_equation); result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); show_equation.append("1"); result.setText(show_equation); result.setSelection(result.getText().length()); signal=0; } } }); two.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(signal==0){ show_equation.append("2"); result.setText(show_equation); result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); show_equation.append("2"); result.setText(show_equation); result.setSelection(result.getText().length()); signal=0; } } }); three.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(signal==0){ show_equation.append("3"); result.setText(show_equation); result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); show_equation.append("3"); result.setText(show_equation); result.setSelection(result.getText().length()); signal=0; } } }); four.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(signal==0){ show_equation.append("4"); result.setText(show_equation); result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); show_equation.append("4"); result.setText(show_equation); result.setSelection(result.getText().length()); signal=0; } } }); five.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(signal==0){ show_equation.append("5"); result.setText(show_equation); result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); show_equation.append("5"); result.setText(show_equation); result.setSelection(result.getText().length()); signal=0; } } }); six.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(signal==0){ show_equation.append("6"); result.setText(show_equation); result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); show_equation.append("6"); result.setText(show_equation); result.setSelection(result.getText().length()); signal=0; } } }); seven.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(signal==0){ show_equation.append("7"); result.setText(show_equation); result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); show_equation.append("7"); result.setText(show_equation); result.setSelection(result.getText().length()); signal=0; } } }); eight.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(signal==0){ show_equation.append("8"); result.setText(show_equation); result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); show_equation.append("8"); result.setText(show_equation); result.setSelection(result.getText().length()); signal=0; } } }); nine.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(signal==0){ show_equation.append("9"); result.setText(show_equation); result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); show_equation.append("9"); result.setText(show_equation); result.setSelection(result.getText().length()); signal=0; } } }); //清屏 cls.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { show_equation.delete(0,show_equation.length()); calculate_equation.clear(); signal=0; result.setText(""); } }); //后退键 //若在结果上使用,则直接清屏 //正常输入时使用,后退一格 backspace.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(!(show_equation.toString().equals(""))) { if(signal==0){ show_equation.deleteCharAt(show_equation.length() - 1); result.setText(show_equation); result.setSelection(result.getText().length()); }else{ show_equation.delete(0,show_equation.length()); result.setText(""); signal=0; } } } }); //小数点的点击事件 point.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //正常输入时点击小数点的处理逻辑 if(signal==0){ //把运算式赋给字符串a String a=show_equation.toString(); //运算式为空,直接加一个小数点并显示 if(a.equals("")){ show_equation.append("."); result.setText(show_equation); result.setSelection(result.getText().length()); } //运算式不为空 else{ int i; char t='0'; //从运算式末尾向前遍历,碰到'.''+''-''*''/'后结束遍历退出 for(i=a.length();i>0;i--){ t=a.charAt(i-1); if(t=='.'||t=='+'||t=='-'||t=='*'||t=='/') break; } //i==0表示遍历运算式没有发现'.''+''-''*''/',则直接在运算式末尾加小数点 if(i==0){ show_equation.append("."); result.setText(show_equation); result.setSelection(result.getText().length()); } //在碰到小数点前碰到了'+''-''*''/',也直接在运算式末尾加小数点 else if(t=='+'||t=='-'||t=='*'||t=='/'){ show_equation.append("."); result.setText(show_equation); result.setSelection(result.getText().length()); } //以上条件均不满足,若说明遍历碰到了小数点,因为一个数不能同时有两个小数点,所以此次点击小数点不做处理 } } //在结果上点击小数点,直接清屏然后加上小数点并显示 else{ show_equation.delete(0,show_equation.length()); show_equation.append("."); result.setText("."); result.setSelection(result.getText().length()); signal=0; } } }); equal.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //判断用户是否输入了内容 if(!show_equation.toString().equals("")&&!(show_equation.toString().equals("错误"))){ signal = 1;//表示在输入结果上 char temp = show_equation.charAt(show_equation.length() - 1);//把运算式的最后一个字符赋给temp if (show_equation.charAt(0) == '-')//如果运算式的第一个字符是'-',说明用户是想输入一个负数 show_equation.insert(0, "0");//此时在运算式的最前面加一个0,用'0-运算数'表示负数 if (temp == '+' || temp == '-')//若为加减 show_equation.append("0");//则结尾默认加减零 if (temp == '*' || temp == '/')//若为乘除 show_equation.append("1");//则结尾默认乘除1 StringBuilder temp1=new StringBuilder(); //从头遍历运算式 for(int i=0;i<show_equation.length();i++){ if(show_equation.charAt(i)>='0'&&show_equation.charAt(i)<='9'||show_equation.charAt(i)=='.'){ //如果是连着的数字和小数点,那就一个一个的拼到temp1中,作为一个完整的运算数 temp1.append(String.valueOf(show_equation.charAt(i))); }else if(show_equation.charAt(i)=='N'){ //如果是NaN就直接把'NaN'加进计算式里 calculate_equation.add("NaN"); //跳过2个字符 i=i+2; }else if(show_equation.charAt(i)=='∞'){ //如果是∞就直接把'∞'加进计算式里 calculate_equation.add("∞"); } else//这种就是遍历到'+''-''*''/'这四种运算符的情况 { //如果temp1长度不为0,说明运算符前有运算数,则把该运算数添加进计算式中并清空temp1中的内容 if(temp1.length()!=0){ calculate_equation.add(temp1.toString()); temp1.delete(0,temp1.length()); } //把运算符添加进去 calculate_equation.add(String.valueOf(show_equation.charAt(i))); } } //把最后一个运算数加进运算式里 if(temp1.length()!=0){ calculate_equation.add(temp1.toString()); } calculate_equation.add("#"); //调用calculate计算出结果返回给temp8 String temp8=calculate(calculate_equation); result.setText(temp8); result.setSelection(result.getText().length()); //清空运算式和计算式 show_equation.delete(0,show_equation.length()); calculate_equation.clear(); //将结果赋给运算式 show_equation.append(temp8); } } }); add.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //判断用户是否输入了内容 if(!(show_equation.toString().equals(""))&&!(show_equation.toString().equals("错误"))) { signal=0; char temp=show_equation.charAt(show_equation.length()-1); if(temp=='+'||temp=='-'||temp=='*'||temp=='/') { show_equation.deleteCharAt(show_equation.length()-1); show_equation.append("+"); } else show_equation.append("+"); result.setText(show_equation); result.setSelection(result.getText().length()); } } }); sub.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //判断用户是否输入了内容 if(!(show_equation.toString().equals(""))&&!(show_equation.toString().equals("错误"))) { signal=0; char temp=show_equation.charAt(show_equation.length()-1); if(temp=='+'||temp=='-'||temp=='*'||temp=='/') { show_equation.deleteCharAt(show_equation.length()-1); show_equation.append("-"); } else show_equation.append("-"); result.setText(show_equation); result.setSelection(result.getText().length()); } else if(!(show_equation.toString().equals("错误"))){ signal=0; show_equation.append("-"); result.setText(show_equation); result.setSelection(result.getText().length()); } } }); mul.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //判断用户是否输入了内容 if(!(show_equation.toString().equals(""))&&!(show_equation.toString().equals("错误"))) { signal=0; char temp=show_equation.charAt(show_equation.length()-1); if(temp=='+'||temp=='-'||temp=='*'||temp=='/') { show_equation.deleteCharAt(show_equation.length()-1); show_equation.append("*"); } else show_equation.append("*"); result.setText(show_equation); result.setSelection(result.getText().length()); } } }); div.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //判断用户是否输入了内容 if(!(show_equation.toString().equals(""))&&!(show_equation.toString().equals("错误"))) { signal=0; char temp=show_equation.charAt(show_equation.length()-1); if(temp=='+'||temp=='-'||temp=='*'||temp=='/') { show_equation.deleteCharAt(show_equation.length()-1); show_equation.append("/"); } else show_equation.append("/"); result.setText(show_equation); result.setSelection(result.getText().length()); } } }); } protected boolean operatorPriorityCompare(char operator1,char operator2) { int o1=0; int o2=0; switch (operator1){ case '+':{o1=0;break;} case '-':{o1=0;break;} case '*':{o1=1;break;} case '/':{o1=1;break;} } switch (operator2){ case '+':{o2=0;break;} case '-':{o2=0;break;} case '*':{o2=1;break;} case '/':{o2=1;break;} } if(o1<=o2) { return false; } else return true; } //相加 public static Double Add(Double d1,Double d2) { if(d1==Double.NEGATIVE_INFINITY||d1==Double.POSITIVE_INFINITY||d2==Double.NEGATIVE_INFINITY||d2==Double.POSITIVE_INFINITY){ return d1+d2; } if(String.valueOf(d1).equals("NaN")||String.valueOf(d1).equals("NaN")){ //如果两个运算数只要有一个是非数'NaN',就直接运算即可 return d1+d2; } //BigDecimal为精确计算的一个数据类型,你可以理解为使用它进行计算结果将更准确 BigDecimal b1 = new BigDecimal(Double.toString(d1)); BigDecimal b2 = new BigDecimal(Double.toString(d2)); //进行计算并将结果转为double返回 return b1.add(b2).doubleValue(); } //相减 public static Double Sub(Double d1,Double d2){ if(d1==Double.NEGATIVE_INFINITY||d1==Double.POSITIVE_INFINITY||d2==Double.NEGATIVE_INFINITY||d2==Double.POSITIVE_INFINITY){ return d1-d2; } if(String.valueOf(d1).equals("NaN")||String.valueOf(d1).equals("NaN")){ return d1-d2; } if(String.valueOf(d1).equals("NaN")||String.valueOf(d1).equals("NaN")){ return d1*d2; } BigDecimal b1=new BigDecimal(Double.toString(d1)); BigDecimal b2=new BigDecimal(Double.toString(d2)); return b1.subtract(b2).doubleValue(); } //相乘 public static Double Mul(Double d1,Double d2){ if(d1==Double.NEGATIVE_INFINITY||d1==Double.POSITIVE_INFINITY||d2==Double.NEGATIVE_INFINITY||d2==Double.POSITIVE_INFINITY){ return d1*d2; } if(String.valueOf(d1).equals("NaN")||String.valueOf(d1).equals("NaN")){ return d1*d2; } BigDecimal b1=new BigDecimal(Double.toString(d1)); BigDecimal b2=new BigDecimal(Double.toString(d2)); return b1.multiply(b2).setScale(8).doubleValue(); } //相除 public static Double Div(Double d1,Double d2){ if(d1==Double.NEGATIVE_INFINITY||d1==Double.POSITIVE_INFINITY||d2==Double.NEGATIVE_INFINITY||d2==Double.POSITIVE_INFINITY){ return d1/d2; } if(String.valueOf(d1).equals("NaN")||String.valueOf(d1).equals("NaN")){ return d1/d2; } if(d1==0.0&&d2==0.0){ return Double.NaN; } if(d2==0.0){ return d1/d2; } BigDecimal b1=new BigDecimal(Double.toString(d1)); BigDecimal b2=new BigDecimal(Double.toString(d2)); return b1.divide(b2,8,BigDecimal.ROUND_HALF_UP).doubleValue(); } //这个方法就是用来计算结果的,在344行被调用,参数为计算式 //里面过程比较复杂,你需先弄懂后缀表达式,然后可对照理解大概流程意思即可 protected String calculate(ArrayList equation){ Double temp2; Double temp3; Double result; List operator=new ArrayList(); List<Double> operand=new ArrayList(); for(int i=0;i<equation.size();i++) { String temp4=(String) equation.get(i); if(temp4.equals("+")||temp4.equals("-")||temp4.equals("*")||temp4.equals("/")) { if(operator.size()>0) { String temp5=operator.get(operator.size()-1).toString(); while(!(operatorPriorityCompare(temp4.charAt(0),temp5.charAt(0)))&&operator.size()>0) { operator.remove(operator.size()-1); temp3=operand.get(operand.size()-1); operand.remove(operand.size()-1); temp2=operand.get(operand.size()-1); operand.remove(operand.size()-1); switch (temp5.charAt(0)){ case '+':{result=Add(temp2,temp3);operand.add(result);break;} case '-':{result=Sub(temp2,temp3);operand.add(result);break;} case '*':{result=Mul(temp2,temp3);operand.add(result);break;} case '/':{result=Div(temp2,temp3);operand.add(result);break;} } if(operator.size()>0) { temp5=operator.get(operator.size()-1).toString(); } else break; } operator.add(temp4); } else operator.add(temp4); } else if(temp4.equals("#")) { while(operator.size()>0) { String temp6=(String)operator.get(operator.size()-1); operator.remove(operator.size()-1); temp3=operand.get(operand.size()-1); operand.remove(operand.size()-1); temp2=operand.get(operand.size()-1); operand.remove(operand.size()-1); switch (temp6.charAt(0)){ case '+':{result=Add(temp2,temp3);operand.add(result);break;} case '-':{result=Sub(temp2,temp3);operand.add(result);break;} case '*':{result=Mul(temp2,temp3);operand.add(result);break;} case '/':{result=Div(temp2,temp3);operand.add(result);break;} } } } else { if(temp4.equals("NaN")){ operand.add(Double.NaN); }else if(temp4.equals("∞")){ operand.add(Double.POSITIVE_INFINITY); }else if(temp4.equals(".")){ return "错误"; }else{ operand.add(Double.parseDouble(temp4)); } } } if(operand.get(0)==Double.NEGATIVE_INFINITY) return "-∞"; if(operand.get(0)==Double.POSITIVE_INFINITY) return "∞"; return operand.get(0).toString(); } //当API最低版小于21时使用这个函数实现点击文本框不弹出键盘 public void disableShowInput(EditText et) { Class<EditText> cls = EditText.class; Method method; try { method = cls.getMethod("setShowSoftInputOnFocus", boolean.class); method.setAccessible(true); method.invoke(et, false); } catch (Exception e) { e.printStackTrace(); } } }
buttonstytle.xml
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" > <!-- 主体背景颜色值 --> <solid android:color="#666666" /> <!-- 连框宽度和颜色值 --> <stroke android:width="0.01dp" android:color="#FFFFFF" /> </shape>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <!--镶嵌一个标题栏--> <EditText android:id="@+id/result" android:layout_width="match_parent" android:layout_height="wrap_content" android:singleLine="true" android:textSize="40sp" /> <LinearLayout android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:orientation="horizontal"> <Button android:id="@+id/cls" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="C" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/div" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="/" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/mul" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="*" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/Backspace" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="Backspace" android:textAllCaps="false" android:textColor="#ffffff" android:textSize="20sp" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:orientation="horizontal"> <Button android:id="@+id/seven" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="7" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/eight" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="8" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/nine" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="9" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/sub" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="-" android:textColor="#ffffff" android:textSize="20sp" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:orientation="horizontal"> <Button android:id="@+id/four" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="4" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/five" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="5" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/six" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="6" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/add" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="+" android:textColor="#ffffff" android:textSize="20sp" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="2" android:orientation="horizontal"> <LinearLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:orientation="vertical"> <LinearLayout android:layout_width="match_parent" android:layout_height="1dp" android:layout_weight="1" android:orientation="horizontal"> <Button android:id="@+id/one" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="1" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/two" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="2" android:textColor="#ffffff" android:textSize="20sp" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="1dp" android:layout_weight="1"> <Button android:id="@+id/zero" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/buttonstytle" android:text="0" android:textColor="#ffffff" android:textSize="20sp" /> </LinearLayout> </LinearLayout> <LinearLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:orientation="horizontal"> <LinearLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:orientation="vertical"> <Button android:id="@+id/three" android:layout_width="match_parent" android:layout_height="1dp" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="3" android:textColor="#ffffff" android:textSize="20sp" /> <Button android:id="@+id/spot" android:layout_width="match_parent" android:layout_height="1dp" android:layout_weight="1" android:background="@drawable/buttonstytle" android:text="." android:textColor="#ffffff" android:textSize="20sp" /> </LinearLayout> <LinearLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1"> <Button android:id="@+id/equal" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/buttonstytle" android:text="=" android:textColor="#ffffff" android:textSize="20sp" /> </LinearLayout> </LinearLayout> </LinearLayout> </LinearLayout>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。
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