Seekbar听众

Question

谢谢你们帮我解决了搜索栏问题...我相信大部分问题都已修复，但有2个新错误...我很抱歉。

public class MainActivity extends Activity {
private RadioGroup rgsexo;
EditText editPeso;
EditText editAltura;
TextView imcView;
SeekBar alterarAltura;
SeekBar alterarPeso;

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    alterarAltura.setOnSeekBarChangeListener(alteraralturaListener);
    editPeso = (EditText)findViewById(R.id.editPeso);
    editAltura = (EditText)findViewById(R.id.editAltura);
    imcView = (TextView)findViewById(R.id.imcView);
    alterarAltura = (SeekBar)findViewById(R.id.alterarAltura);
    alterarPeso = (SeekBar)findViewById(R.id.alterarPeso);
    alterarAltura.setOnSeekBarChangeListener(alteraralturaListener);

}

private OnSeekBarChangeListener alteraralturaListener = new OnSeekBarChangeListener() {

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress,
    boolean fromUser) {
        // TODO Auto-generated method stub
        // Calcula o novo valor do TIP
        editAltura=(alterarAltura.getProgress()) * .01;
        // mostra na caixa o valor novo
        alterarAltura.setText(String.format("%.02f", editAltura).replace(',', '.'));
    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {

    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {

    }
};

错误是

“editAltura =（alterarAltura.getProgress（））* .01;” 输入missmatch，无法将edittext转换为double

“alterarAltura.setText（String.format（”％。02f“，editAltura）.replace（'，'，'。'））;” 对于SeekBar类型

，未定义setText（String）的方法

我做错了吗？

Answer 1

alterarAltura.setOnSeekBarChangeListener(alteraralturaListener);需要位于方法内（例如onCreate(...)）。

Answer 2

你设置了错误的变量：alterarAltura是一个SeekBar。将其复制到onProgressChanged：

double myDouble = (alterarAltura.getProgress()) * .01d;
// mostra na caixa o valor novo
editAltura.setText(String.format("%.02f", myDouble).replace(',', '.'));

Answer 3

首先，重新排列您的活动代码，然后说出您面临的问题。

public class MainActivity extends Activity {
    private RadioGroup rgsexo;
    EditText editPeso;
    EditText editAltura;
    TextView imcView;
    SeekBar alterarAltura;
    SeekBar alterarPeso;
    alterarAltura.setOnSeekBarChangeListener(alteraralturaListener);

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.your_layout);

        editPeso = (EditText)findViewById(R.id.editPeso);
        editAltura = (EditText)findViewById(R.id.editAltura);
        imcView = (TextView)findViewById(R.id.imcView);
        alterarAltura = (SeekBar)findViewById(R.id.alterarAltura);
        alterarPeso = (SeekBar)findViewById(R.id.alterarPeso);
        alterarAltura.setOnSeekBarChangeListener(alteraralturaListener);

    }

    private OnSeekBarChangeListener alteraralturaListener = new OnSeekBarChangeListener() {

        @Override
        public void onProgressChanged(SeekBar seekBar, int progress,
        boolean fromUser) {
            // TODO Auto-generated method stub
            // Calcula o novo valor do TIP
            editAltura=(alterarAltura.getProgress()) * .01;
            // mostra na caixa o valor novo
            alterarAltura.setText(String.format("%.02f", editAltura).replace(',', '.'));
        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {

        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {

        }
    };
}