private TextView tvHeight,tvWeight,tvBmi,tvResult;
    private double height,weight,bmi;
    private int photoId;

        tvHeight=findViewById(R.id.tvHeight);
        tvWeight=findViewById(R.id.tvWeight);
        tvBmi=findViewById(R.id.tvBmi);
        tvResult=findViewById(R.id.tvResult);

        Intent intent=getIntent();
        Bundle bundle=intent.getExtras();
        height=bundle.getDouble("height");
        weight=bundle.getDouble("weight");
        getResult();//計算與實做方法