Question

我需要使用editText连接微调器以获取转换器的结果

微调器和我的转换器之间没有连接。

public class A01Acre extends Activity {
    Spinner spinnerarea;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.a01acre);  


        final    EditText editAcre = (EditText) findViewById(R.id.editAcre);        
        final    EditText editHectar = (EditText) findViewById(R.id.editHectar);        
        final    EditText editSquareinch = (EditText) findViewById(R.id.editSquareinch);
        final    EditText editSquarekm = (EditText) findViewById(R.id.editSquarekm);
        final    EditText editSquaremeter = (EditText) findViewById(R.id.editSquaremeter);
        final    EditText editSquaremile = (EditText) findViewById(R.id.editSquaremile);
        final    EditText editSquareyard = (EditText) findViewById(R.id.editSquareyard);

        Button buttonConvert = (Button) findViewById (R.id.buttonConvertAcre);
        buttonConvert.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                //try
                try {
                    //    
                    double acre = Double.valueOf (editAcre.getText().toString());
                    double hectar = acre * 0.404686;
                    double squareinch = acre * 6.273e+6;
                    double squarekm = acre * 0.00404686;
                    double squaremeter = acre * 4046.86;
                    double squaremile = acre * 0.0015625;
                    double squareyard = acre * 4840;


                    editHectar.setText (String.valueOf(hectar));
                    editSquareinch.setText (String.valueOf(squareinch));
                    editSquarekm.setText (String.valueOf(squarekm));                    
                    editSquaremeter.setText (String.valueOf(squaremeter));
                    editSquaremile.setText (String.valueOf(squaremile));                    
                    editSquareyard.setText (String.valueOf(squareyard));        

                    //catch
                } catch (NumberFormatException ex) {
                    // write a message to users
                    editHectar.setText ("");
                }
            }


        });


        spinnerarea = (Spinner) findViewById(R.id.spinnerarea);

        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                this, R.array.spinnerTestArray, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinnerarea.setAdapter(adapter);
        spinnerarea.setOnItemSelectedListener(new MyOnItemSelectdListerne());
    }

    @Override
    public void onDestroy(){
        super.onDestroy();
    }


    public class MyOnItemSelectdListerne implements OnItemSelectedListener {

        @Override
        public void onItemSelected(AdapterView<?> patent,
                View view, int pos, long id) {
            String str = patent.getItemAtPosition(pos).toString().toUpperCase();
        }

        @Override
        public void onNothingSelected(AdapterView parent) {




        }
    }
}

Answer 1

在onItemSelected()方法中添加切换语句 - 启用pos。

对于每个单元（每个case），您可以重新计算然后将值输出给用户。

类似的东西，

switch(pos) {
    case 0:
        //acre - redo calculation
        break;
    case 1:
        //hectare - redo calculation
        break;
    case 2:
        //squareinch - redo calculation
        break;
    //...
    default:
        throw new UnexpectedException();
}

//display results to user

如何将微调器连接到我的转换器

1 个答案: