爲什麼onResume（）在活動啓動時調用？

我有一個應用程序，在登錄後將它引發到歡迎屏幕。我把吐司時看到的onResume火災，但它也激發後的onCreate爲什麼onResume（）在活動啓動時調用？

protected void onResume(){ 
    super.onResume(); 
    Database openHelper = new Database(this);//create new Database to take advantage of the SQLiteOpenHelper class 
    myDB2 = openHelper.getReadableDatabase(); // or getWritableDatabase(); 
    myDB2=SQLiteDatabase.openDatabase("data/data/com.example.login2/databases/aeglea", null, SQLiteDatabase.OPEN_READONLY);//set myDB to aeglea 
     cur = fetchOption("SELECT * FROM user_login");//use above to execute SQL query 
     msg.setText("Username: "+cur.getString(cur.getColumnIndex("username")) 
        +"\nFull name: "+cur.getString(cur.getColumnIndex("name"))+" "+cur.getString(cur.getColumnIndex("last")) 
        +"\ne-mail: "+cur.getString(cur.getColumnIndex("email")) 
        +"\nAeglea id:"+cur.getString(cur.getColumnIndex("uid"))); 

     Toast.makeText(getApplicationContext(), "RESUMED", Toast.LENGTH_SHORT).show(); 
}

它來源於：

//create new intent 
Intent log = new Intent(getApplicationContext(), Welcome.class); 
// Close all views before launching logged 
    log.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
    startActivity(log); 
    // Close Login Screen 
    finish();

我百思不得其解。請提供一些在這裏的經驗

來源

2012-08-30 MayTheSchwartzBeWithYou

'onPause'或'onResume'？ – zapl

@zapl對不起，我會編輯我的問題 – MayTheSchwartzBeWithYou