Question

我如何随机选择radiobutton？

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        List<Integer> objects = new ArrayList<Integer>();
        objects.add(0);
        objects.add(1);
        objects.add(2);
        objects.add(3);
        objects.add(4);

        Collections.shuffle(objects);

        List<Button> buttons = new ArrayList<Button>();
        buttons.add((Button)findViewById(R.id.button0));
        buttons.add((Button)findViewById(R.id.button1)); 
        buttons.add((Button)findViewById(R.id.button2));
        buttons.add((Button)findViewById(R.id.button3));
        buttons.add((Button)findViewById(R.id.button4));

        for (int i = 0; i < objects.size(); i++) {
        buttons.get(i).setText(objects.get(i).toString());
        }

    }

代码不是单选按钮的“GROUP”，它是如何成为RadioGroup的？并以随机顺序显示。有人帮忙吗？

Answer 1

这是一个创建带有无线电组的单选按钮的例子....

 private void createRadioButton() {

 List<Integer> objects = new ArrayList<Integer>();
        objects.add(0);
        objects.add(1);
        objects.add(2);
        objects.add(3);
        objects.add(4);

        Collections.shuffle(objects);

            final RadioButton[] rb = new RadioButton[5];
            RadioGroup rg = new RadioGroup(this); //create the RadioGroup
            rg.setOrientation(RadioGroup.HORIZONTAL);//or RadioGroup.VERTICAL
            for(int i=0; i<5; i++){
                rb[i]  = new RadioButton(this);
                rg.addView(rb[i]); //the RadioButtons are added to the radioGroup instead of the layout
                rb[i].setText(objects.get(i)+"");
            }
            ll.addView(rg);//you add the whole RadioGroup to the layout
            ll.addView(submit); 
            submit.setOnClickListener(new View.OnClickListener() {
                public void onClick(View v) {
                    for(int i = 0; i < 5; i++) { 
                        rg.removeView(rb[i]);//now the RadioButtons are in the RadioGroup
                    }  
                    ll.removeView(submit);

                }
            });   
        }

radiobutton的随机“GROUP”？

1 个答案: