如果 Spinner 下拉列表中的條件

Question

我使用微調器創建了一個下拉列表，但現在我希望在選擇某個值時顯示一條特定消息，並在輸入某個關鍵字時顯示一個 EditText。 我嘗試使用 if 條件，但它不起作用。 場景是這樣的：當用戶輸入自己的age超過 18 歲並從下拉hire中選擇“是”時，會出現一條消息，必須同時滿足兩個條件

 public void stan(View hiring){
        ArrayAdapter<CharSequence> hire=ArrayAdapter.createFromResource(this,R.array.decide, android.R.layout.simple_spinner_item);
        hire.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(hire);
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                String decide =spinner.getSelectedItem().toString()
            }
            @Override
            public void onNothingSelected(AdapterView<?> parent) {
            }
        });
        int age= Integer.parseInt(aged.getText().toString());
        if(age>18 && spinner.equals("Yes")){
            Toast.makeText(this,"Ok, go eat cabbage sauce",Toast.LENGTH_LONG).show();
        }else{
            Toast.makeText(this,"no",Toast.LENGTH_LONG).show();
        }

Answer 1

嘗試這個

public void stan(View hiring){
        ArrayAdapter<CharSequence> hire=ArrayAdapter.createFromResource(this,R.array.decide, android.R.layout.simple_spinner_item);
        hire.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(hire);
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                String decide =spinner.getSelectedItem().toString();
                int age= Integer.parseInt(aged.getText().toString());
                if(age>18 && decide.equals("Yes")){
                Toast.makeText(this,"Ok, go eat cabbage sauce",Toast.LENGTH_LONG).show();
                }else{
                Toast.makeText(this,"no",Toast.LENGTH_LONG).show();
                }
            }
            @Override
            public void onNothingSelected(AdapterView<?> parent) {
            }
        });

Answer 2

使用spinner.getSelectedItem().toString()

最后，您的情況將是

if(age>18 && spinner.getSelectedItem().toString().equals("Yes")){
             Toast.makeText(YourActivityName.this,"Ok, go eat cabbage sauce",Toast.LENGTH_LONG).show();
            }else{
             Toast.makeText(YourActivityName.this,"no",Toast.LENGTH_LONG).show();
            }