Question

在主要活动我有单选按钮，在方法public void onRadioButtonClicked（查看视图）我将选中的每个单选按钮与一个值相关联，所以我有两个变量a和b，之后我点击按钮bton i根据方法ajouter，a和b值进入database.Until现在一切都是okey，我决定使用OnResume和OnPause方法来保存活动状态，所以当我返回活动时我看到单选按钮被选中，问题来自我点击按钮保存信息，我得到0作为数据库中的a和b的值，而不是我看到选择的值，而奇怪的是，当我再次点击单选按钮，之后保存按钮，我得到正确的价值！我的问题是如何在不单击所选单选按钮的情况下创建a和b的值？

    public class ActivityUn extends Activity {
        public void  ajouter(View v) {
          db.open();               
          db.insertMENAGE(a,b);                   
          db.close();
          Toast.makeText(getApplicationContext(), "Données Enregistrées",Toast.LENGTH_SHORT).show();
              } 

   @Override
protected void onCreate(Bundle savedInstanceState) {

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

         Button bton = (Button)findViewById(R.id.ajoutUn);
         bton.setOnClickListener(new View.OnClickListener() {  

          @Override
             public void onClick(View v) {

                   ajouter(v);                                            }
         });

public void onRadioButtonClicked(View view) {
    // Is the button now checked?

        boolean checked = ((RadioButton) view).isChecked();

            // Check which radio button was clicked
            switch(view.getId()) {
                case R.id.rm_13_1:
                    if (checked)
                          a=1;
                        break;
                case R.id.rm_13_2:
                    if (checked)
                        a=2;
                        break;

                case R.id.rm_14_1:
                    if (checked)
                        b=1;

                    break;
                case R.id.rm_14_2:
                    if (checked)
                        b=2;
                       break;
                case R.id.rm_14_3:
                    if (checked)
                        b=3;
                    findViewById
                    break;
                case R.id.rm_14_4:
                    if (checked)
                        b=4;
                          break;
  }
}

@Override
protected void onPause() {
    super.onPause();
    SharedPreferences prefs3 = getSharedPreferences(PREFS_NAME,
        MODE_PRIVATE);
    SharedPreferences.Editor editor = prefs3.edit();
    editor.putBoolean("questionA", rm_13_1.isChecked());
    editor.putBoolean("questionB", rm_13_2.isChecked());
    editor.putBoolean("questionC", rm_14_1.isChecked());
    editor.putBoolean("questionD", rm_14_2.isChecked());
    editor.putBoolean("questionE", rm_14_3.isChecked());
    editor.commit();
}

@Override
protected void onResume() {
    super.onResume();
    SharedPreferences prefs3 = getSharedPreferences(PREFS_NAME,MODE_PRIVATE);
    rm_13_1 = (RadioButton) findViewById(R.id.rm_13_1);
    rm_13_2 = (RadioButton) findViewById(R.id.rm_13_2);
    rm_14_1 = (RadioButton) findViewById(R.id.rm_14_1);
    rm_14_2 = (RadioButton) findViewById(R.id.rm_14_2);
    rm_14_3 = (RadioButton) findViewById(R.id.rm_14_2);
    Boolean rm_13_1A = false;
    Boolean rm_13_2A = false;
    Boolean rm_14_1A = false;
    Boolean rm_14_2A = false;
    Boolean rm_14_3A = false;
    rm_13_1A = prefs3.getBoolean("questionA", false);
    rm_13_2A = prefs3.getBoolean("questionB", false);
    rm_14_1A = prefs3.getBoolean("questionC", false);
    rm_14_2A = prefs3.getBoolean("questionD", false);
    rm_14_3A = prefs3.getBoolean("questionE", false);
    rm_13_1.setChecked(rm_13_1A);
    rm_13_2.setChecked(rm_13_2A);
    rm_14_1.setChecked(rm_14_1A);
    rm_14_2.setChecked(rm_14_2A);
    rm_14_3.setChecked(rm_14_3A);
}

Answer 1

单选按钮应仅存在于单选按钮组中。单选按钮的特征是一次只能选择组中的一个。如果用户选择C，则取消选择所有其他单选按钮（考虑多项选择问题。您只能选择一个答案）如果您希望选择多个选项，请查看android的CheckBox view

保存单选按钮的状态和值

1 个答案: