private SQLiteDatabase db;public long getCountsTable(String tableName){
String sql = "SELECT COUNT(*) FROM "+tableName;
SQLiteStatement statement = db.compileStatement(sql);
long count = statement.simpleQueryForLong();
return count;
}
注:量少時可以這樣,量大時上電時獲取,然後添加時加1,這樣不用多次去取,因爲取一次的時間比較長