android进制计算器

以下是一个简单的Android进制计算器的代码实现，可以进行二进制、八进制、十进制和十六进制的转换和计算：

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {
    EditText etDec, etHex, etOct, etBin;
    Button btnDec, btnHex, btnOct, btnBin, btnCls, btnDel;
    TextView tvResult;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        etDec = findViewById(R.id.etDec);
        etHex = findViewById(R.id.etHex);
        etOct = findViewById(R.id.etOct);
        etBin = findViewById(R.id.etBin);
        btnDec = findViewById(R.id.btnDec);
        btnHex = findViewById(R.id.btnHex);
        btnOct = findViewById(R.id.btnOct);
        btnBin = findViewById(R.id.btnBin);
        btnCls = findViewById(R.id.btnCls);
        btnDel = findViewById(R.id.btnDel);
        tvResult = findViewById(R.id.tvResult);

        // 十进制转换
        btnDec.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String decStr = etDec.getText().toString().trim();
                if (!decStr.equals("")) {
                    int dec = Integer.parseInt(decStr);
                    etHex.setText(Integer.toHexString(dec));
                    etOct.setText(Integer.toOctalString(dec));
                    etBin.setText(Integer.toBinaryString(dec));
                }
            }
        });

        // 十六进制转换
        btnHex.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String hexStr = etHex.getText().toString().trim();
                if (!hexStr.equals("")) {
                    int dec = Integer.parseInt(hexStr, 16);
                    etDec.setText(String.valueOf(dec));
                    etOct.setText(Integer.toOctalString(dec));
                    etBin.setText(Integer.toBinaryString(dec));
                }
            }
        });

        // 八进制转换
        btnOct.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String octStr = etOct.getText().toString().trim();
                if (!octStr.equals("")) {
                    int dec = Integer.parseInt(octStr, 8);
                    etDec.setText(String.valueOf(dec));
                    etHex.setText(Integer.toHexString(dec));
                    etBin.setText(Integer.toBinaryString(dec));
                }
            }
        });

        // 二进制转换
        btnBin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String binStr = etBin.getText().toString().trim();
                if (!binStr.equals("")) {
                    int dec = Integer.parseInt(binStr, 2);
                    etDec.setText(String.valueOf(dec));
                    etHex.setText(Integer.toHexString(dec));
                    etOct.setText(Integer.toOctalString(dec));
                }
            }
        });

        // 清空输入框
        btnCls.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                etDec.setText("");
                etHex.setText("");
                etOct.setText("");
                etBin.setText("");
                tvResult.setText("");
            }
        });

        // 删除最后一个字符
        btnDel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String decStr = etDec.getText().toString().trim();
                String hexStr = etHex.getText().toString().trim();
                String octStr = etOct.getText().toString().trim();
                String binStr = etBin.getText().toString().trim();

                if (!decStr.equals("")) {
                    etDec.setText(decStr.substring(0, decStr.length() - 1));
                }
                if (!hexStr.equals("")) {
                    etHex.setText(hexStr.substring(0, hexStr.length() - 1));
                }
                if (!octStr.equals("")) {
                    etOct.setText(octStr.substring(0, octStr.length() - 1));
                }
                if (!binStr.equals("")) {
                    etBin.setText(binStr.substring(0, binStr.length() - 1));
                }
            }
        });

        // 计算结果
        tvResult.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String decStr = etDec.getText().toString().trim();
                String hexStr = etHex.getText().toString().trim();
                String octStr = etOct.getText().toString().trim();
                String binStr = etBin.getText().toString().trim();

                if (!decStr.equals("") && hexStr.equals("") && octStr.equals("") && binStr.equals("")) {
                    tvResult.setText(decStr);
                } else if (decStr.equals("") && !hexStr.equals("") && octStr.equals("") && binStr.equals("")) {
                    tvResult.setText(hexStr);
                } else if (decStr.equals("") && hexStr.equals("") && !octStr.equals("") && binStr.equals("")) {
                    tvResult.setText(octStr);
                } else if (decStr.equals("") && hexStr.equals("") && octStr.equals("") && !binStr.equals("")) {
                    tvResult.setText(binStr);
                } else {
                    tvResult.setText("请输入正确的数值");
                }
            }
        });
    }
}

此代码实现了四种进制之间的转换和计算，并且支持清空输入框和删除最后一个字符的功能。可以根据需要进一步完善。