Android数据存储和检索

Question

我开发了一个Android应用程序，其中用户在6个单独的文本框中提供6条信息（信息，例如名字，姓氏，中间名，手机号码电子邮件ID等）

当用户按下“ Save按钮时，我需要存储此信息，并且在按下“ Recall按钮时能够调用该信息。

下一步要完成什么

到目前为止，我的代码如下：

public class MainActivity extends Activity {


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


        final DatePicker date = (DatePicker) findViewById (R.id.datePicker1);
        final TextView tv1 = (TextView) findViewById (R.id.textView88);
        final TextView tv2 = (TextView) findViewById (R.id.textView89);
        final TextView tv3 = (TextView) findViewById (R.id.textView90);
        final TextView tv4 = (TextView) findViewById (R.id.textView91);
        final TextView tv5 = (TextView) findViewById (R.id.textView92);
        final TextView tv6 = (TextView) findViewById (R.id.textView93);
        final TextView tv7 = (TextView) findViewById (R.id.textView94);


        date.init(date.getYear(), date.getMonth(), date.getDayOfMonth(),new OnDateChangedListener()
        {


        @Override
        public void onDateChanged(DatePicker  arg0, int arg1, int arg2, int arg3) 
        {
            // TODO Auto-generated method stub



         String date=Integer.toString(arg3);
         String month=Integer.toString(arg2);
         String year=Integer.toString(arg1);

         tv1.setText(date+ month+1 +year);
         tv2.setText(month+1 + date);
         tv3.setText(year);
         tv4.setText(month+1);
         tv5.setText(date);
         tv6.setText(date + year);

        }   

    });}


    public void sum(View v)        
    {
        long sum1=0;
        long sum2=0;
        long sum3=0;
        long sum4=0;
        long sum5=0;
        long sum6=0;
        long sum7=0;
        long sum8=0;
        long sum=0;
        long sum11=0;
        long sum12=0;
        long sum13=0;
        long sum14=0;
        long sum100=0;




        EditText et1 = (EditText) findViewById (R.id.editText1);
        EditText et2 = (EditText) findViewById (R.id.editText2);
        EditText et3 = (EditText) findViewById (R.id.editText3);
        EditText et4 = (EditText) findViewById (R.id.editText4);
        EditText et5 = (EditText) findViewById (R.id.editText5);
        EditText et6 = (EditText) findViewById (R.id.editText6);


        final DatePicker date = (DatePicker) findViewById (R.id.datePicker1);
        final TextView tv1 = (TextView) findViewById (R.id.textView88);
        final TextView tv2 = (TextView) findViewById (R.id.textView89);
        final TextView tv3 = (TextView) findViewById (R.id.textView90);
        final TextView tv4 = (TextView) findViewById (R.id.textView91);
        final TextView tv5 = (TextView) findViewById (R.id.textView92);
        final TextView tv6 = (TextView) findViewById (R.id.textView93);
        final TextView tv7 = (TextView) findViewById (R.id.textView94);







        sum1=getSum(et1.getText().toString() + et2.getText().toString() + et3.getText().toString() + et4.getText().toString());
        sum2=getSum1(et1.getText().toString() + et2.getText().toString() + et3.getText().toString() + et4.getText().toString());
        sum3=getSum2(tv1.getText().toString());
        /*sum4=getSum3(tv2.getText().toString());*/
        sum5=getSum4(tv3.getText().toString());
        sum6=getSum5(tv4.getText().toString());
        sum8=getSum7(tv5.getText().toString());


        String yearf = tv3.getText().toString();
        int yearb = Integer.valueOf(yearf);

        int val = 2013 - yearb;
        long val1 = sum3;
        /*int val2 = Integer.valueOf(val1);*/
        long val3 = 36 - val1;
        int val4 = 9;
        long val5 = val3 + val4;
        long val6 = val5 + val4;
        long val7 = val6 + 50;


        sum = getSum3(tv2.getText().toString()) + getSum8(tv6.getText().toString());
        sum100 = getSum4(tv3.getText().toString()) + getSum5(tv4.getText().toString());



        if (val <= val3)
        {
            sum4=getSum3(tv2.getText().toString());
        }

        else if ((val <= val5) && (val > val3))
        {
            sum4=getSum8(tv6.getText().toString());
        }

        else if ((val<=val6) && (val > val5) && (val > val3))
        {
            /*sum = getSum3(tv2.getText().toString()) + getSum8(tv6.getText().toString());*/
             sum4=getSum9(Integer.toString((int) sum));


        }
        else 
        {
             sum4=getSum9(Integer.toString((int) sum100));
        }






        if (val <= val3)
        {



        if (sum8>sum6)
        {
            sum7 = (sum8 - sum6);
        }
        else 
        {
            sum7 = (sum6 - sum8);
        }

        }

        else if ((val <= val5) && (val > val3))
        {
            if(sum5>sum8)
            {
                sum7=(sum5 - sum8);
            }
            else
            {
                sum7 = (sum8 - sum5);
            }
        }


        else if ((val<=val6) && (val > val5) && (val > val3))
        {
            sum11 = (sum5 - sum8);
            sum12 = (sum8 - sum5);
            sum13 = (sum6 - sum8);
            sum14 = (sum8 - sum6);

            if ((sum11 > sum12) && (sum13 > sum14))
            {
                if (sum11 > sum13)
                {
                    sum7 = sum11 - sum13;
                }
                else 
                {
                    sum7 = sum13 - sum11;
                }
            }
            else if ((sum12 > sum11) && (sum13 > sum14))
            {
                if (sum12 > sum13)
                {
                    sum7 = sum12 - sum13;
                }
                else 
                {
                    sum7 = sum13 - sum12;
                }
            }
            else if ((sum11 > sum12) && (sum14 > sum13))
            {
                if (sum11 > sum14)
                {
                    sum7 = sum11 - sum14;
                }
                else 
                {
                    sum7 = sum14 - sum11;
                }
            }
            else if ((sum12 > sum11) && (sum14 > sum13))
            {
                if (sum12 > sum14)
                {
                    sum7 = sum12 - sum14;
                }
                else 
                {
                    sum7 = sum14 - sum12;
                }
            }

        }
            else 
            {

                if (sum5>sum6)
                {
                    sum7 = (sum5 - sum6);
                }
                else 
                {
                    sum7 = (sum6 - sum5);
                }

                }










        String edtxt1 = et1.getText().toString();
        String edtxt4 = et4.getText().toString();
        String edtxt5 = et5.getText().toString();
        String edtxt6 = et6.getText().toString();

        if(edtxt1.equals(""))
        {
            Toast.makeText(getApplicationContext(),"First Name should not be left blank, Please enter your First Name ", Toast.LENGTH_LONG).show();
        }

        else if(edtxt4.equals(""))
        {
            Toast.makeText(getApplicationContext(),"Last Name should not be left blank, Please enter your Last Name ", Toast.LENGTH_LONG).show();
        }
        else if(edtxt5.equals(""))
        {
            Toast.makeText(getApplicationContext(),"Mobile Number should not be left blank, Please enter your Mobile Number ", Toast.LENGTH_LONG).show();
        }
        else if(edtxt6.equals(""))
        {
            Toast.makeText(getApplicationContext(),"E-Mail id should not be left blank, Please enter your E-Mail id ", Toast.LENGTH_LONG).show();
        }

        else{

        Intent i = new Intent(this, result.class);
        i.putExtra("name", sum1 + "");
        i.putExtra("name1", sum2 + "");
        i.putExtra("name2", sum3 + "");
        i.putExtra("name3", sum4 + "");
        i.putExtra("name4", sum7 + "");



        startActivity(i);


        }


public long getSum(String text) 
    {
        // TODO Auto-generated method stub
        long sum1 = 0;
        char[] name = new char[text.length()];
        name = text.toCharArray();


        for(int i=0; i<text.length(); i++)
        {
            sum1 += value( name[i] );

        }
        while (sum1>9)
        {
            sum1 = findDigitSum(sum1);
        }

        return sum1;
    }



    public long getSum1(String text) 
    {
        // TODO Auto-generated method stub
        long sum2 = 0;
        char[] name1 = new char[text.length()];
        name1 = text.toCharArray();


        for(int i=0; i<text.length(); i++)
        {
            sum2 += value1( name1[i] );

        }
        while (sum2>9)
        {
            sum2 = findDigitSum(sum2);
        }

        return sum2;
    }

Answer 1

db = openOrCreateDatabase（“ MyDBI”，MODE_PRIVATE，null）;

    db.execSQL("CREATE TABLE IF NOT EXISTS TABLE1 ();");

您可以使用此代码创建数据库

db.execSQL（“ INSERT INTO TABLE1 VALUES（'” + fname“'）;

并且可以使用此代码将值插入此数据库。

可以创建表格布局，并且可以在此表格布局中显示保存的详细信息。 提供可点击的选项并单击所有详细信息可以使用意图转移到上一个活动。