我们如何让编辑框默认为空，显示微调器的结果？

Question

 String[] categories = {"All", "Surgeon", "Pediatrician", "Cardiologist", "Dermatologist"};
        String[][] dca={
                {"Dr Chandiram","Dr Hamza","Dr Pervaiz","Dr Naeem","Dr Rajesh","Dr Sami"},
                {"Dr Chandiram","Dr Hamza",},
                {"Dr Pervaiz"},{"Dr Naeem","Dr Rajesh"},
                {"Dr Sami"}
                };
        ArrayAdapter aa = new ArrayAdapter(this,android.R.layout.simple_spinner_item,categories);
        aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        drspin.setAdapter(aa);
        drspin.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                String a = drspin.getSelectedItem().toString();
                if(a.equals("All")){
                    ArrayAdapter myad = new ArrayAdapter(getApplicationContext(),R.layout.support_simple_spinner_dropdown_item,dca[0]);
                    drcat.setAdapter(myad);
                }else if(a.equals("Surgeon")){
                    ArrayAdapter myad = new ArrayAdapter(getApplicationContext(),R.layout.support_simple_spinner_dropdown_item,dca[1]);
                    drcat.setAdapter(myad);
                }else if(a.equals("Pediatrician")){
                    ArrayAdapter myad = new ArrayAdapter(getApplicationContext(),R.layout.support_simple_spinner_dropdown_item,dca[2]);
                    drcat.setAdapter(myad);
                }
                else if(a.equals("Cardiologist")){
                    ArrayAdapter myad = new ArrayAdapter(getApplicationContext(),R.layout.support_simple_spinner_dropdown_item,dca[3]);
                    drcat.setAdapter(myad);
                }
                else if(a.equals("Dermatologist")){
                    ArrayAdapter myad = new ArrayAdapter(getApplicationContext(),R.layout.support_simple_spinner_dropdown_item,dca[4]);
                    drcat.setAdapter(myad);
                }

//                sd.setText(a);
            }
            @Override
            public void onNothingSelected(AdapterView<?> parent) {
            }
        });
        drcat.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                    sd.setText(drcat.getSelectedItem().toString());
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });

如何保持编辑框默认为空，显示微调器的结果，当我们点击微调器的任何项目时，只有它必须在编辑框中显示结果，否则它必须保持为空

Answer 1

您的解决方案之一如下：

String[] categories = {"Select","All", "Surgeon", "Pediatrician", "Cardiologist", "Dermatologist"};


 drspin.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            String a = drspin.getSelectedItem().toString();
            if(a.equals("Select")){
                editText.setText("");
            } else if(a.equals("All")){
                ArrayAdapter myad = new ArrayAdapter(getApplicationContext(),R.layout.support_simple_spinner_dropdown_item,dca[0]);
                drcat.setAdapter(myad);
            }else if(a.equals("Surgeon")){
                ArrayAdapter myad = new ArrayAdapter(getApplicationContext(),R.layout.support_simple_spinner_dropdown_item,dca[1]);
                drcat.setAdapter(myad);
            }else if(a.equals("Pediatrician")){
                ArrayAdapter myad = new ArrayAdapter(getApplicationContext(),R.layout.support_simple_spinner_dropdown_item,dca[2]);
                drcat.setAdapter(myad);
            }
            else if(a.equals("Cardiologist")){
                ArrayAdapter myad = new ArrayAdapter(getApplicationContext(),R.layout.support_simple_spinner_dropdown_item,dca[3]);
                drcat.setAdapter(myad);
            }
            else if(a.equals("Dermatologist")){
                ArrayAdapter myad = new ArrayAdapter(getApplicationContext(),R.layout.support_simple_spinner_dropdown_item,dca[4]);
                drcat.setAdapter(myad);
            }

        }