我有計數器,它會計算我點擊一個按鈕的次數。爲什麼我的字符串不能像我想要的那樣排序,當我從textview插入值時?
public void onClick(View v) {
counter++;
text.setText("Score"+counter);
}
然後我插入到我的DB值這個
text = (TextView) findViewById(R.id.textView1);
final String Score = text.getText().toString();
mySQLiteAdapter.openToWrite();
mySQLiteAdapter.insert("sccore="Score);
mySQLiteAdapter.close();
這是我的插入功能
public long insert(String content){
ContentValues contentValues = new ContentValues();
contentValues.put(KEY_CONTENT, content);
return sqLiteDatabase.insert(MYDATABASE_TABLE, null, contentValues);
}
所以所插入是 - 計數器值>分數= 2,分數= 1 ,分數= 111,分數= 3,分數= 21 < - (其計數器值)
然後我想看到t他在另一個texview所以分數:
mySQLiteAdapter = new SQLiteAdapter(this);
/*
* Open the same SQLite database
* and read all it's content.
*/
mySQLiteAdapter = new SQLiteAdapter(this);
mySQLiteAdapter.openToRead();
String contentRead = mySQLiteAdapter.queueAll();
listContent.setText(contentRead);
mySQLiteAdapter.close();
我溫控功能queueAll()看起來像:
public String queueAll(){
String[] columns = new String[]{KEY_CONTENT};
Cursor cursor = sqLiteDatabase.query(MYDATABASE_TABLE, columns,
null, null, null, null, KEY_CONTENT+" desc");
String result = "";
int index_CONTENT = cursor.getColumnIndex(KEY_CONTENT);
for(cursor.moveToFirst(); !(cursor.isAfterLast()); cursor.moveToNext()){
result = result + cursor.getString(index_CONTENT) + "\n";
}
return result;
}
確定,在文本視圖中我看到了這一點:
Score = 3 , Score=21 , Score=2 , Score=111, Score=1
,但我想
score=111, score=21, score=3, score=2, score=1.
爲什麼順序由DESC沒有排序這像我想在DESC?爲什麼這樣想?爲什麼我插入的計數器值沒有排序DESC?
public static final String MYDATABASE_NAME = "MY_DATABASE";
public static final String MYDATABASE_TABLE = "MY_TABLE";
public static final int MYDATABASE_VERSION = 1;
public static final String KEY_CONTENT = "Content";
//create table MY_DATABASE (ID integer primary key, Content text not null);
private static final String SCRIPT_CREATE_DATABASE =
"create table " + MYDATABASE_TABLE + " ("
+ KEY_CONTENT + " text not null);";
說實話,我的專欄KEY_CONTENT應該是NUMBER而不是STRING。如何改變這一點? 當我將str更改爲num時,會按照我想要的DESC工作順序進行排序?
感謝一個充分的準備問題。 – Szymon