让我的Android单选按钮被选中

Question

当我运行这段代码并点击对话框时，我的单选按钮没有像预期的那样被选中。

    package edu.elon.cs.mobile;



public class PTCalculator extends Activity{

    private RadioButton maleRadioButton;
    private RadioButton femaleRadioButton;

    private EditText ageEdit;
    private EditText pushUpsEdit;
    private EditText sitUpsEdit;
    private EditText mileMinEdit;
    private EditText mileSecEdit;

    private Button calculate;

    private TextView score;

    protected AlertDialog genderAlert;
    private int currScore;

    private int age;
    private int sitUps;
    private int runTime;
    private int pushUps;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.pt);
        maleRadioButton = (RadioButton) findViewById(R.id.male);
        femaleRadioButton = (RadioButton) findViewById(R.id.female);

        ageEdit = (EditText) findViewById(R.id.ageEdit);
        pushUpsEdit = (EditText) findViewById(R.id.pushupEdit);
        sitUpsEdit = (EditText) findViewById(R.id.situpEdit);
        mileMinEdit = (EditText) findViewById(R.id.minEdit);
        mileSecEdit = (EditText) findViewById(R.id.secEdit);

        calculate = (Button) findViewById(R.id.calculateButton);
        calculate.setOnClickListener(calculateButtonListener);

        score = (TextView) findViewById(R.id.scoreView);

        genderAlert = makeGenderDialog().create();
    }


    private OnClickListener calculateButtonListener = new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            age = (Integer.parseInt(ageEdit.getText().toString()));
            pushUps = (Integer.parseInt(pushUpsEdit.getText().toString()));
            sitUps = (Integer.parseInt(sitUpsEdit.getText().toString()));

            int min = (Integer.parseInt(mileMinEdit.getText().toString())*60);
            int sec = (Integer.parseInt(mileSecEdit.getText().toString()));
            runTime = min + sec;

            if(maleRadioButton.isChecked()){
                MalePTTest mPTTest = new MalePTTest(age, pushUps, sitUps, runTime);
                currScore = mPTTest.malePTScore();
                score.setText((Integer.toString(currScore)));

            }else if(femaleRadioButton.isChecked()){ 
                FemalePTTest fPTTest = new FemalePTTest(age, pushUps, sitUps, runTime);
                currScore = fPTTest.femalePTScore();
                score.setText((Integer.toString(currScore)));

            }else
                genderAlert.show();
        }
    };

    public AlertDialog.Builder makeGenderDialog(){

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("Select a Gender")
        .setCancelable(false)

        .setPositiveButton("Female", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                femaleRadioButton.setSelected(true);
                FemalePTTest fPTTest = new FemalePTTest(age, pushUps, sitUps, runTime);
                currScore = fPTTest.femalePTScore();
                score.setText((Integer.toString(currScore)));
            }
        })
        .setNegativeButton("Male", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                maleRadioButton.setSelected(true);
                MalePTTest mPTTest = new MalePTTest(age, pushUps, sitUps, runTime);
                currScore = mPTTest.malePTScore();
                score.setText((Integer.toString(currScore)));
            }
        });

        return builder;
    }


}

有什么建议吗？

- user180825

Answer 1

更改：

maleRadioButton.setSelected(true);

收件人：

maleRadioButton.setChecked(true); 

"Selected"表示视图被突出显示（类似于具有焦点），而setChecked设置了项目的状态，根据API：

public void setSelected(boolean selected) Since: API Level 1

更改此视图的选择状态。视图可以被选择或未选择。请注意，选择并不等同于焦点。视图通常在像ListView或GridView这样的AdapterView的上下文中被选择；所选视图是突出显示的视图。 参数selected 如果必须选择视图，则为true，否则为false。

- stealthcopter