Question

我有一个自定义的无线电组对话框，我正在动态充气。
在我的onCreate()我正在做这个

super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
alarmType1 = (TextView) findViewById(R.id.tvAlarmType);
View view = LayoutInflater.from(this).inflate(R.layout.custom_layout, null, false);

        radioAlarmtype = (RadioGroup) view.findViewById(R.id.radiogroup);
initRadioDialog();

然后使用以下代码初始化对话框

String string_Alarmtype[]={"Melody","Vibration","Melody and Vibration"};

    public void initRadioDialog()
    {
        Context context=AlarmActivity.this;
        dialog_radio=new Dialog(context);
        dialog_radio.requestWindowFeature(Window.FEATURE_NO_TITLE);

        View view = LayoutInflater.from(context).inflate(R.layout.custom_layout, null, false);
        radioAlarmtype = (RadioGroup) view.findViewById(R.id.radiogroup);
        RadioGroup.LayoutParams layoutParams = new RadioGroup.LayoutParams(
                RadioGroup.LayoutParams.WRAP_CONTENT,
                RadioGroup.LayoutParams.WRAP_CONTENT);

        // add 3 radio buttons to the group
        RadioButton rb;
        for (int i = 0; i < 3; i++){
            rb = new RadioButton(context);
            rb.setText(string_Alarmtype[i]);
            rb.setId(i);
            radioAlarmtype.addView(rb, layoutParams);
        }

        radioAlarmtype.check(2);
        radioAlarmtype.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                // checkedId is the RadioButton selected
                RadioButton rb = (RadioButton) findViewById(checkedId);
                //alarmType1.setText(rb.getText());
                Toast.makeText(AlarmActivity.this, checkedId + "", Toast.LENGTH_SHORT).show();

            }
        });

        dialog_radio.setContentView(view);
    }

但在评论行//alarmType1.setText(rb.getText());上方导致 nullpointerException 所以我在我的textview onClickListener上尝试了它像这样

View.OnClickListener alarmTypeListener = new View.OnClickListener() {


    public void onClick(View v) {

        dialog_radio.show();
        RadioButton rb = (RadioButton) findViewById(radioAlarmtype.getCheckedRadioButtonId());
        alarmType1.setText(rb.getText());//NUllpointerException here
       Toast.makeText(AlarmActivity.this,"HEllo"+rb.getText(),Toast.LENGTH_SHORT).show();
//here also nullpointerException if I comment above line
    }

};

但问题仍然存在，所以我如何将textview更改为对话框中单选按钮选择的更改。

从动态radiogroup对话框中获取单选按钮指针

0 个答案: