Android Studio（java）代码的冗余错误

Question

这是一个计算器程序，其中有几个输入用于创建多个输出。我正在编写的应用程序上的单个按钮运行所有计算然后给出输出。

我在public void onClick

下的行上得到一个一致的“警告”

警告是：Variable 'aResult' initializer 'Double.parseDouble(tvaResult.getText().toString())'是多余的

    package com.example.ericallenbellville.rcbeamdesign;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private Button btnCalc;
    private TextView tvaResult;
    private TextView tvcResult;
    private TextView tvetResult;
    private TextView tvphiResult;
    private TextView tvMnResult;
    private TextView tvphiMnResult;
    private TextView tvbeta1Result;
    private EditText etB,etD,etAs,etFc,etFy;

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

    private void init() {
        btnCalc = (Button)findViewById(R.id.btnCalc);
        etB = (EditText)findViewById(R.id.etB);
        etD = (EditText)findViewById(R.id.etD);
        etAs = (EditText)findViewById(R.id.etAs);
        etFc = (EditText)findViewById(R.id.etFc);
        etFy = (EditText)findViewById(R.id.etFy);
        tvaResult = (TextView)findViewById(R.id.tvaResult);
        tvcResult = (TextView)findViewById(R.id.tvcResult);
        tvetResult = (TextView)findViewById(R.id.tvetResult);
        tvphiResult = (TextView)findViewById(R.id.tvphiResult);
        tvMnResult = (TextView)findViewById(R.id.tvMnResult);
        tvphiMnResult = (TextView)findViewById(R.id.tvphiMnResult);
        tvbeta1Result = (TextView)findViewById(R.id.tvbeta1Result);
        btnCalc.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
            btnCalc = (Button)findViewById(R.id.btnCalc);
            Double B = Double.parseDouble(etB.getText().toString());
            Double  D = Double.parseDouble(etD.getText().toString());
            Double As = Double.parseDouble(etAs.getText().toString());
            Double Fc = Double.parseDouble(etFc.getText().toString());
            Double Fy = Double.parseDouble(etFy.getText().toString());
            Double aResult = Double.parseDouble(tvaResult.getText().toString());
            Double cResult = Double.parseDouble(tvcResult.getText().toString());
            Double etResult = Double.parseDouble(tvetResult.getText().toString());
            Double beta1Result = Double.parseDouble(tvbeta1Result.getText().toString());
            Double phiResult = Double.parseDouble(tvphiResult.getText().toString());
            Double MnResult = Double.parseDouble(tvMnResult.getText().toString());
            Double phiMnResult = Double.parseDouble(tvphiMnResult.getText().toString());
            switch(view.getId() ) {
                case R.id.btnCalc:
                    if (Fc <= 4000) {
                        beta1Result = (0.85);
                    } else if (4000 < Fc && Fc <= 8000) {
                        beta1Result = ((0.85)-(0.05 * ((Fc - 4000) / (1000))));
                    } else {
                        beta1Result = 0.65;
                    }
                    aResult = ((Fy * As) / (0.85 * Fc * B));
                    cResult = (aResult / beta1Result);
                    etResult = (((D - cResult) / (cResult)) * 0.003);
                    if (etResult >= 0.005) {
                        phiResult = (0.9);
                    } else if (0.002 <= etResult && etResult < 0.005) {
                        phiResult = (0.65 + (etResult - 0.002) * 0.25 / (0.005 - 0.002));
                    } else {
                        phiResult = (0.00);
                    }
                    MnResult = (((Fy * As) * (D - (aResult / 2.0))));
                    phiMnResult = phiResult * MnResult;
                    tvaResult.setText(String.valueOf(aResult));
                    tvcResult.setText(String.valueOf(cResult));
                    tvetResult.setText(String.valueOf(etResult));
                    tvphiResult.setText(String.valueOf(phiResult));
                    tvMnResult.setText(String.valueOf(MnResult));
                    tvphiMnResult.setText(String.valueOf(phiMnResult));

            }}
    }