什么是以降序显示我的数据的最有效的方法?
public String getRank() { String[] rank = new String[]{ KEY_ROWID }; Cursor c = scoreDb.query(DATABASE_TABLE,rank,null,null); //reading information from db. String rankResult = ""; int iRow = c.getColumnIndex(KEY_ROWID); //Cursor looking for column setting equal to these ints. for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { //Move to first row - where cursor starts and moves to next row as long it is not after last row. rankResult = rankResult + c.getString(iRow) + "\n"; //Returning value of row that it is currently on. } return rankResult; //returning result } public String getName() { String[] name = new String[]{ KEY_NAME }; Cursor c = scoreDb.query(DATABASE_TABLE,name,null); //reading information from db. String nameResult = ""; int iRow1 = c.getColumnIndex(KEY_NAME); //Cursor looking for column setting equal to these ints. for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { //Move to first row - where cursor starts and moves to next row as long it is not after last row. nameResult = nameResult + c.getString(iRow1) + "\n"; //Returning value of row that it is currently on. } return nameResult; //returning result } public String getscore() { String[] score = new String[]{ KEY_score }; Cursor c = scoreDb.query(DATABASE_TABLE,score,null); //reading information from db. String scoreResult = ""; int iRow2 = c.getColumnIndex(KEY_score); //Cursor looking for column setting equal to these ints. for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { //Move to first row - where cursor starts and moves to next row as long it is not after last row. scoreResult = scoreResult + c.getString(iRow2) + "\n"; //Returning value of row that it is currently on. } return scoreResult; //returning result }