2

我是安卓新手。

我面临数组列表的问题。问题是,

我的数组是字符串数组列表。我需要的是什么?我有两个数组列表。QtnsArraylist1 包含 4 个元素(4 个问题),AnsArraylist2 包含 16 个元素(16 个答案,每个问题 4 个选项共 16 个元素)。对于 QtnsArraylist1 中的第一个问题,我必须从 AnsArraylist2 中获取前 4 个元素。同样适用于 2、3、4如果给出下一个按钮的问题。我怎么能得到?.

请帮我一个。

提前致谢。

      D/TAG(910): 1
      D/TAG(910): 2
      D/TAG(910): 3
      D/TAG(910): 4
      D/TAG(910): 5
      D/TAG(910): 6
      D/TAG(910): 1
      D/TAG(910): 2
      D/TAG(910): 3
      D/TAG(910): 4
      D/TAG(910): 5
      D/TAG(910): 6
      D/TAG(910): 1
      D/TAG(910): 2
      D/TAG(910): 3
      D/TAG(910): 4
      D/TAG(910): 5
      D/TAG(910): 6
      D/TAG(910): 1
      D/TAG(910): 2
      D/TAG(910): 3
      D/TAG(910): 4
      D/TAG(910): 5
      D/TAG(910): 6
      D/TAG(910): 1
      D/TAG(910): 2
      D/TAG(910): 3
      D/TAG(910): 4
      D/TAG(910): 5
      D/TAG(910): 6
      D/AndroidRuntime(910): Shutting down VM
      W/dalvikvm(910): threadid=1: thread exiting with uncaught exception 
      (group=0x40015560)
      E/AndroidRuntime(910): FATAL EXCEPTION: main
      E/AndroidRuntime(910): java.lang.IndexOutOfBoundsException: Invalid index 16, size 
      is 16
      E/AndroidRuntime(910):    at 
      java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257)
      E/AndroidRuntime(910):    at java.util.ArrayList.get(ArrayList.java:311)

代码

     protected void onPostExecute(String file_url) {
        pDialog.dismiss();  
        for ( int i = 0,j = 0; i < ques1.size(); i++) {
            String s1 = ques1.get(i).toString();
            Log.d("TAG", "1");
            TextView txtque = (TextView) findViewById(R.id.que_txt); 
            txtque.setText(s1);
            Log.d("TAG", "2");
            btn_practicerg =(RadioGroup) findViewById(R.id.rdgroup);
            Log.d("TAG", "3");
            btn_practice1 = (RadioButton) findViewById(R.id.RB1);
            Log.d("TAG", "4");
            btn_practice2 = (RadioButton) findViewById(R.id.RB2);
            Log.d("TAG", "5");
            btn_practice3 = (RadioButton) findViewById(R.id.RB3);
            Log.d("TAG", "6");
            btn_practice4 = (RadioButton) findViewById(R.id.RB4);
            String s2 = answ1.get(j++);
            btn_practice1.setText(s2);
            String s3 = answ1.get(j++);
            btn_practice1.setText(s3);
            String s4 = answ1.get(j++);
            btn_practice1.setText(s4);
            String s5 = answ1.get(j++);   
            btn_practice1.setText(s5);
            //Display them
        }     
    }
4

2 回答 2

1

我无法完全了解您的问题。如果要显示 ArrayList1 中的一个元素,然后显示 ArrayList2 的 4 个元素,那么它非常简单。

for ( int i = 0,j = 0; i < ArrayList1.size(); i++) {
    s1 = ArrayList1.get(i);
    s2 = ArrayList2.get(j++);
    s3 = ArrayList2.get(j++);
    s4 = ArrayList2.get(j++);
    s5 = ArrayList2.get(j++);   
    //Display them
}     

请随时提出任何疑问。

试试下面的代码

Log.d("TAG", "onCreate() entered");
    setContentView(R.layout.activity_main);
    ArrayList<String> questionsList = new ArrayList<String>();
    ArrayList<String> answersList = new ArrayList<String>();

    //Initializing the arrayLists
    for (int index = 0; index < 4; index++) {
        questionsList.add("ques" + index + 1);
    }
    for (int index = 0; index < 16; index++) {
        answersList.add("ans" + index + 1);
    }

    //Output
    for (int questionIndex = 0, answerIndex = 0; questionIndex < questionsList.size(); questionIndex++) {
        Log.d("TAG", questionsList.get(questionIndex));

        Log.d("TAG", answersList.get(answerIndex++));
        Log.d("TAG", answersList.get(answerIndex++));
        Log.d("TAG", answersList.get(answerIndex++));
        Log.d("TAG", answersList.get(answerIndex++));

    }

我将方法附加到 radioBtn 和 textViews 中。

在布局文件中设置 textView ids "@+id/questionView1" "@+id/questionView2" 等等,radioBtns 为

 "@+id/radioBtn1"
 "@+id/radioBtn2" 

以此类推直到16

节目中

 for (int questionIndex = 0, answerIndex = 0; questionIndex < questionsList.size(); questionIndex++) {
        TextView tv = (TextView) findViewById(R.id.questionView + questionIndex + 1);
        tv.setText(questionsList.get(questionIndex));

        RadioButton rb1 = (RadioButton) findViewById(R.id.radioBtn + answerIndex + 1);
        rb1.setText(answersList.get(answerIndex++));

        RadioButton rb2 = (RadioButton) findViewById(R.id.radioBtn + answerIndex + 1);
        rb2.setText(answersList.get(answerIndex++));

        RadioButton rb3 = (RadioButton) findViewById(R.id.radioBtn + answerIndex + 1);
        rb3.setText(answersList.get(answerIndex++));

        RadioButton rb4 = (RadioButton) findViewById(R.id.radioBtn + answerIndex + 1);
        rb4.setText(answersList.get(answerIndex++));


    }
于 2013-01-24T05:43:53.730 回答
1

你可以做类似的事情,

int j = 0;
for ( int i = 0; i < ArrayList1.size(); i++) {
    Log.d("ArrayList1", ArrayList1.get(i));
    Log.d("ArrayList2", ArrayList2.get(j));
    j++;
    Log.d("ArrayList2", ArrayList2.get(j));
    j++;
    Log.d("ArrayList2", ArrayList2.get(j));
    j++;
    Log.d("ArrayList2", ArrayList2.get(j));
    j++;
}
于 2013-01-24T05:49:27.533 回答