java代码
packagecom.djzzhq.app;/* 手机编程王APP & AIDE编译器联合出品 官方微信2133688724 微信公众号：手机编程APP 官网：www.shoujibiancheng.com */importandroidx.appcompat.app.AppCompatActivity;importandroid.os.Bundle;importandroid.view.View;importandroid.widget.AdapterView;importandroid.widget.ArrayAdapter;importandroid.widget.Button;importandroid.widget.EditText;importandroid.widget.Spinner;importandroid.widget.TextView;importandroid.widget.Toast;publicclassMainActivityextendsAppCompatActivity{privateEditTextetInput;privateSpinnerspinnerFrom,spinnerTo;privateTextViewtvResult;// 新增3/9/36/62进制选项privateString[]radixArray={"二进制","三进制","八进制","九进制","十进制","十六进制","三十六进制","六十二进制"};privateintfromRadix=2,toRadix=10;// 62进制字符映射表：0-9,a-z,A-ZprivatestaticfinalStringCHAR62="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);etInput=findViewById(R.id.et_input);spinnerFrom=findViewById(R.id.spinner_from);spinnerTo=findViewById(R.id.spinner_to);tvResult=findViewById(R.id.tv_result);ButtonbtnConvert=findViewById(R.id.btn_convert);ArrayAdapter<String>adapter=newArrayAdapter<>(this,android.R.layout.simple_spinner_item,radixArray);adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);spinnerFrom.setAdapter(adapter);spinnerTo.setAdapter(adapter);spinnerFrom.setOnItemSelectedListener(newAdapterView.OnItemSelectedListener(){@OverridepublicvoidonItemSelected(AdapterView<?>parent,Viewview,intposition,longid){fromRadix=getRadixByPosition(position);}@OverridepublicvoidonNothingSelected(AdapterView<?>parent){}});spinnerTo.setOnItemSelectedListener(newAdapterView.OnItemSelectedListener(){@OverridepublicvoidonItemSelected(AdapterView<?>parent,Viewview,intposition,longid){toRadix=getRadixByPosition(position);}@OverridepublicvoidonNothingSelected(AdapterView<?>parent){}});btnConvert.setOnClickListener(v->convertRadix());}// 映射Spinner选项到对应进制数privateintgetRadixByPosition(intposition){switch(position){case0:return2;case1:return3;case2:return8;case3:return9;case4:return10;case5:return16;case6:return36;case7:return62;default:return10;}}// 核心转换方法：统一转十进制再转目标进制privatevoidconvertRadix(){StringinputStr=etInput.getText().toString().trim();if(inputStr.isEmpty()){Toast.makeText(this,"请输入要转换的数值",Toast.LENGTH_SHORT).show();return;}try{// 输入转十进制longdecimal=strToDecimal(inputStr,fromRadix);// 十进制转目标进制Stringresult=decimalToStr(decimal,toRadix);tvResult.setText("转换结果："+result);}catch(Exceptione){Toast.makeText(this,"输入数值与原进制不匹配",Toast.LENGTH_SHORT).show();tvResult.setText("转换失败");}}// 自定义任意进制字符串转十进制privatelongstrToDecimal(Strings,intradix)throwsException{if(radix<=16){returnLong.parseLong(s,radix);}longnum=0;s=s.toLowerCase();// 36/62进制统一小写处理for(charc:s.toCharArray()){intindex=CHAR62.indexOf(c);if(index==-1||index>=radix){thrownewException("非法字符");}num=num*radix+index;}returnnum;}// 自定义十进制转任意进制字符串privateStringdecimalToStr(longnum,intradix){if(radix<=16){returnLong.toString(num,radix).toUpperCase();}if(num==0)return"0";StringBuildersb=newStringBuilder();while(num>0){intremainder=(int)(num%radix);sb.append(CHAR62.charAt(remainder));num=num/radix;}returnsb.reverse().toString();}}activity_main.xml代码<?xml version="1.0"encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:padding="20dp"><!--输入数值--><EditTextandroid:id="@+id/et_input"android:layout_width="match_parent"android:layout_height="wrap_content"android:hint="请输入要转换的数值"android:inputType="text"/><!--原进制选择--><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginTop="15dp"android:orientation="horizontal"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="原进制："/><Spinnerandroid:id="@+id/spinner_from"android:layout_width="match_parent"android:layout_height="wrap_content"/></LinearLayout><!--目标进制选择--><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginTop="15dp"android:orientation="horizontal"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="目标进制："/><Spinnerandroid:id="@+id/spinner_to"android:layout_width="match_parent"android:layout_height="wrap_content"/></LinearLayout><!--转换按钮--><Buttonandroid:id="@+id/btn_convert"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginTop="20dp"android:text="转换"/><!--结果显示--><TextViewandroid:id="@+id/tv_result"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginTop="20dp"android:textSize="18sp"/></LinearLayout>
