android - 如何在AlertDialog android中获取RadioGroup的选定索引

Question

我正在做一个应用程序，它根据按下的按钮改变背景颜色，但我遇到了一个问题。我想要做的是在我的 AlertDialog 上的 RadioGroup 中获取选定的颜色，我尝试了很多方法但我无法获取它，我找不到类似的答案。

public void alertDialogColors()
{

    final View toDisplayInDialog = getLayoutInflater().inflate(R.layout.radiogroup, null);

    AlertDialog.Builder builder2 = new AlertDialog.Builder(this);
    builder2.setView(toDisplayInDialog);
    builder2.setMessage("Choose Startup Color");
    builder2.setPositiveButton("Set Startup Color", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            // TODO Auto-generated method stub

            RadioGroup myRadioGroup = (RadioGroup)toDisplayInDialog.findViewById(R.id.RadioGroup);
            int radioGroupId = myRadioGroup.getCheckedRadioButtonId();
            RadioButton myCheckedButton = (RadioButton)toDisplayInDialog.findViewById(radioGroupId);
            int index = myRadioGroup.indexOfChild(myCheckedButton);

            switch(index)
            {
                case 0:
                    saveColors(KEY_COLOR, Color.WHITE);
                    break;

                case 1: 
                    saveColors(KEY_COLOR, Color.BLACK);
                    break;

                case 2:
                    saveColors(KEY_COLOR, Color.RED);
                    break;

                case 3: 
                    saveColors(KEY_COLOR, Color.YELLOW);
                    break;

                case 4:
                    saveColors(KEY_COLOR, Color.GREEN);
                    break;

            }

        }
    })

    .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            // TODO Auto-generated method stub

        }
    })
    .create()
    .show();
}

Answer 1

试试这个..

    public void saveButtons(String temp, boolean bool)
{
    SharedPreferences.Editor ed = myPrefs.edit();
    ed.putBoolean(temp, bool);
    ed.commit();
}

//Alert Dialog Colors
public void alertDialogColors()
{

    final View toDisplayInDialog = getLayoutInflater().inflate(R.layout.radiogroup, null);
    final RadioGroup myRadioGroup = (RadioGroup)toDisplayInDialog.findViewById(R.id.RadioGroup);
    RadioButton checkRadioButton = (RadioButton) myRadioGroup.getChildAt(indexCheckRadioButton);
    checkRadioButton.setChecked(true);

    AlertDialog.Builder builder2 = new AlertDialog.Builder(this);
    builder2.setView(toDisplayInDialog);
    builder2.setMessage("Choose Startup Color");
    builder2.setPositiveButton("Set Startup Color", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {
            // TODO Auto-generated method stub

            int radioGroupId = myRadioGroup.getCheckedRadioButtonId();
            RadioButton myCheckedButton = (RadioButton)toDisplayInDialog.findViewById(radioGroupId);
            int index = myRadioGroup.indexOfChild(myCheckedButton);
            indexCheckRadioButton = index;

            switch(index)
            {
                case 0:
                    saveColors(KEY_COLOR, Color.WHITE);
                    saveRadioButton(KEY_RADIOBUTTON, indexCheckRadioButton);
                    break;

                case 1: 
                    saveColors(KEY_COLOR, Color.BLACK);
                    saveRadioButton(KEY_RADIOBUTTON, indexCheckRadioButton);
                    break;

                case 2:
                    saveColors(KEY_COLOR, Color.RED);
                    saveRadioButton(KEY_RADIOBUTTON, indexCheckRadioButton);
                    break;

                case 3: 
                    saveColors(KEY_COLOR, Color.YELLOW);
                    saveRadioButton(KEY_RADIOBUTTON, indexCheckRadioButton);
                    break;

                case 4:
                    saveColors(KEY_COLOR, Color.GREEN);
                    saveRadioButton(KEY_RADIOBUTTON, indexCheckRadioButton);
                    break;

            }
        }
    })

    .setNegativeButton("Cancel", null)
    .create()
    .show();
}


public void saveRadioButton(String temp3, int color2)
{
    SharedPreferences.Editor ed3 = myPrefs.edit();
    ed3.putInt(temp3, color2);
    ed3.commit();
}