Question

     public class ques1 extends AppCompatActivity {
        SQLiteDatabase sql2;
        TextView txtv2;
        RadioButton rb1,rb2;
        Button btn2;
        Cursor c;
        String Ans="";

这些是我的3阵列列表

       @Override
     protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ques1);

 ArrayList<String> q = new ArrayList<String>(3);
    q.add("1.who is the fastest man on Earth?");
    q.add("2.how many days are there in a leap year?");
    q.add("3.what is the national animal of India");

    ArrayList<String> options1 = new ArrayList<String>(3);
    options1.add("Nikhil sudan");
    options1.add("365");
    options1.add("Lion");

    ArrayList<String> options2 = new ArrayList<String>(3);
    options2.add("Usain Bolt");
    options2.add("366");
    options2.add("Tiger");

   ArrayList<String> answer = new ArrayList<String>(3);
    answer.add("Usain BOlt");
    answer.add("365");
    answer.add("Tiger");

以及我如何将其插入到我的表中

    sql2 = openOrCreateDatabase("ddb", MODE_PRIVATE, null);
    sql2.execSQL("create table if not exists bank(question varchar,option1 varchar,option2 varchar,answ varchar)");

    for (int i = 0; i < q.size(); i++){
        sql2.execSQL("insert into bank values('" + q.get(i) + "','" + options1.get(i) + "','" + options2.get(i) + "','"+answer.get(i)+"')");
    }

和原始查询将问题和选项添加到我的android活动并提交按钮以使用 Ans

检查单选按钮的文本值

    c=sql2.rawQuery("Select * from bank where q="+q.get(1).charAt(1),null);
    c.moveToFirst();
    txtv2.setText(c.getString(c.getColumnIndex("question")));
    rb1.setText(c.getString(c.getColumnIndex("option1")));
    rb2.setText(c.getString(c.getColumnIndex("option2")));
    Ans=c.getString(c.getColumnIndex("answ"));

    btn2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (rb1.isChecked()){
                if (rb1.getText().equals(Ans)){
                    Toast.makeText(ques1.this,"Right answer",Toast.LENGTH_SHORT).show();
                }
                else
                    Toast.makeText(ques1.this,"wrong choice",Toast.LENGTH_SHORT).show();
            }

            if (rb2.isChecked()){
                if (rb1.getText().equals(Ans)){
                    Toast.makeText(ques1.this,"right Ans",Toast.LENGTH_SHORT).show();
                }
                else
                    Toast.makeText(ques1.this,"Wrong choice",Toast.LENGTH_SHORT).show();
            }
        }
    });

我的日志（已更新）：

致命的例外：主要过程：com.nikhil.dingdong，PID：26739 java.lang.RuntimeException：无法启动活动ComponentInfo {com.nikhil.dingdong / com.nikhil.dingdong.ques1}：android.database.sqlite.SQLiteException：near＆＃34;。＆＃34;：语法错误（代码1）:,编译时：从bank中选择*，其中question =。在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2416）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2476）在android.app.ActivityThread.-wrap11（ActivityThread.java）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1344）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:148）在android.app.ActivityThread.main（ActivityThread.java:5417） at java.lang.reflect.Method.invoke（Native Method）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:726）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:616）引起：android.database.sqlite.SQLiteException：near＆＃34;。＆＃34 ;:语法错误（代码1）:,同时编译：select * from bank where question =。在android.database.sqlite.SQLiteConnection.nativePrepareStatement（本机方法）在android.database.sqlite.SQLiteConnection.acquirePreparedStatement（SQLiteConnection.java:887）在android.database.sqlite.SQLiteConnection.prepare（SQLiteConnection.java:498）在android.database.sqlite.SQLiteSession.prepare（SQLiteSession.java:588）在android.database.sqlite.SQLiteProgram。（SQLiteProgram.java:58）在android.database.sqlite.SQLiteQuery。（SQLiteQuery.java:37）在android.database.sqlite.SQLiteDirectCursorDriver.query（SQLiteDirectCursorDriver.java:44）在android.database.sqlite.SQLiteDatabase.rawQueryWithFactory（SQLiteDatabase.java:1316）在android.database.sqlite.SQLiteDatabase.rawQuery（SQLiteDatabase.java:1255）在com.nikhil.dingdong.ques1.onCreate（ques1.java:67）在android.app.Activity.performCreate（Activity.java:6237）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1107）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2369）

Answer 1

首先纠正你的答案的arraylist所以它不会给出arrayindexoutofboundexception

ArrayList<String> answer = new ArrayList<String>(3);
answer .add("Usain BOlt");
answer .add("365");
answer .add("Tiger");

编辑如下：

btn2.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        if (rb1.isChecked()){
            if (rb1.getText().equals(Ans)){
                Toast.makeText(ques1.this,"Right answer",Toast.LENGTH_SHORT).show();
            }
            else
                Toast.makeText(ques1.this,"wrong choice",Toast.LENGTH_SHORT).show();
        }

        if (rb2.isChecked()){
            if (rb2.getText().equals(Ans)){
                Toast.makeText(ques1.this,"right Ans",Toast.LENGTH_SHORT).show();
            }
            else
                Toast.makeText(ques1.this,"Wrong choice",Toast.LENGTH_SHORT).show();
        }
    }
});

在你的rawQuery中删除.charAt（1）

在rawquery

中将q = q.get（1）替换为question = q.get（1）

我有3个ArrayList，我想将值放入SQLite数据库的表中？我尝试了下面的代码，但活动没有打开

1 个答案: