使用多个 activity 将值插入同一个 regist/row

Question

我将举例说明我想要实现的目标：

假设我有一个名为“5Fruits”的 table 有 6 个营地：

ID - Fruit1 - Fruit2 - Fruit3 - Fruit4 - Fruit5

使用 3 种不同的活动（或更多）我想先插入 activity fruit1，然后我有一个按钮 "next" 打开另一个 activity 我插入 fruit2 和fruit 3 然后又是一个按钮 "next" 打开最后一个 activity 我插入 fruit4 和 fruit5.

并将五个水果保存在同一行，注册，随便什么。

我怎样才能做到这一点？它一定很简单，但我没有弄明白。谢谢

Answer 1

您可以使用 putExtra 方法在活动之间传输一些数据。就这样。

Define a stringArray in your mainActivity. And put Fruit1 in.

       String[] myFruits= new String[6];
       myFruits[0] = "apple";

       //Start your second activity.
       Intent intent = new Intent(this, secondActivity.class); 
       intent.putExtra("myExtras", myFruits); 
       startActivity(intent);

For your other activities.

String[] myFruits;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.bla_bla_bla);

              //gets oldFruits.
    Intent intent = getIntent();
    myFruits = intent.getStringArrayExtra("myExtras");
}
private void sendFruits()
{
    myFurits[i] = "banana";  // "i" is your fruit number;
    Intent intent = new Intent(this, otherActivities.class);
    intent.putExtra("myExtras", myFruits);    //sends new fruits
    startActivity(intent);
}

Your Last Activity

private SQLiteDatabase sqw;
String[] myFruits;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.bla_bla_bla);

              //gets oldFruits.
    Intent intent = getIntent();
    myFruits = intent.getStringArrayExtra("myExtras");
}



//if your id column is not AUTOINCREMENT, you can add query in.

String query = "INSERT INTO YOURTABLE (Fruit1,Fruit2,Fruit3,Fruit4,Fruit5)
        VALUES("'+myFruits[0]+'","'+myFruits[1]+'","'+myFruits[2]+'","'+myFruits[3]+'","'+myFruits[4]+'");";
sqw = new YOURDB().getWritableDatabas();   //get your db openhelper instance 
sqw.execSQL(query);    //your fruits inserted

It's not good way. Because using multiple activities for a just process that decreases your application performance. You can use with Fragments or dynamically creation Buttons and EditTexts and your process in a one Activity.

使用多个 activity 将值插入同一个 regist/row

Insert values into same regist/row using more than one activity

mysql

android

android-database