我的程序运行不正常

Question

所以我的问题是我试图制作一个转换测量的应用程序，每次按下计算它只是一直给我我的吐司说＆＃34;无法转换为相同类型＆＃34 ;而且我没有转换成相同的类型！我不知道为什么这样做！我有一件事要把米改成厘米，它应该可以工作，但是当我在我的旋转器中这样做时，它并没有。我正在使用Android 4.1.2 API 16.在LG L9 p769 T-Mobile上进行测试。我还试过清理它一切都行不通我在代码中没有看到任何错误？

spin1 = (Spinner) findViewById(R.id.spinner1);
        et1 = (EditText) findViewById(R.id.editText1);
        et2 = (EditText) findViewById(R.id.editText2);
        spin2 = (Spinner) findViewById(R.id.spinner2);

        spin1.setOnItemSelectedListener (new OnItemSelectedListener() {

            public void onItemSelected(AdapterView<?> aparent, View arg1,
                    int pos, long arg3) {

                String selectedItem = spin1.getSelectedItem().toString();
                if(selectedItem.equals("meter")){
                    d4 = 1;
                }

                if(selectedItem.equals("centimeter")){
                    d4 = 2;
                }

                if(selectedItem.equals("milimeter")){
                    d4 = 3;
                }

                if(selectedItem.equals("yard")){
                    d4 = 4;
                }

                if(selectedItem.equals("foot")){
                    d4 = 5;
                }

                if(selectedItem.equals("inch")){
                    d4 = 6;
                }



            }

            public void onNothingSelected(AdapterView<?> aparent) {
                d4 = 99;
            }
        });

        spin2.setOnItemSelectedListener (new OnItemSelectedListener() {

            public void onItemSelected(AdapterView<?> aparent, View arg2,
                    int pos, long arg4) {

                String selectedItem1 = spin1.getSelectedItem().toString();
                if(selectedItem1.equals("meter")){
                    d7 = 1;
                }

                if(selectedItem1.equals("centimeter")){
                    d7 = 2;
                }

                if(selectedItem1.equals("milimeter")){
                    d7 = 3;
                }

                if(selectedItem1.equals("yard")){
                    d7 = 4;
                }

                if(selectedItem1.equals("foot")){
                    d7 = 5;
                }

                if(selectedItem1.equals("inch")){
                    d7 = 6;
                }



            }

            public void onNothingSelected(AdapterView<?> aparent) {
                d7 = 99;
            }
        });

    }



    @Override
    public boolean onCreateOptionsMenu(android.view.Menu menu) {
        super.onCreateOptionsMenu(menu);
        MenuInflater blowUp = getMenuInflater();
        blowUp.inflate(R.menu.cool_menu, menu);
        return true;

    }




    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        switch(item.getItemId()){

        case R.id.tcMenu:
            Intent e = new Intent(this, MainActivity.class);
            startActivity(e);
            break;
        case R.id.weightMenu:
            Intent f = new Intent(this, weight.class);
            startActivity(f);
            break;
        case R.id.mikmMenu:
            Intent g = new Intent(this, distance.class);
            startActivity(g);
            break;
        case R.id.measureMenu:
            Intent h = new Intent(this, measurement.class);
            startActivity(h);
            break;
        }
        return false;
    }




    public void calCulate(View view){
        String d1, d2;
        Double d5, d6;
        double d3;
        Toast itemdupe = Toast.makeText(measurement.this, "Can't convert to same type", Toast.LENGTH_SHORT);

        d1 = et1.getText().toString();
        d5 = Double.parseDouble(d1);

        if(d4 == d7){

            itemdupe.show();

        }

        if((d4 == 1) && (d7 ==2)){
            d3 = d5 / 0.010000;
            et2.setText("" + d3);
        }








    }

Answer 1

spin2.setOnItemSelectedListener (new OnItemSelectedListener() {

            public void onItemSelected(AdapterView<?> aparent, View arg2,
                    int pos, long arg4) {

                //Should be spin2 below, not spin1 I believe
                String selectedItem1 = spin1.getSelectedItem().toString();

你有很多代码重复...