以下是我用来抓取存储在SQLite表中的所有结果的代码。我的问题是,它只返回单个行,而我知道DB中有21行。
public HashMap<String, String> fetchResults(String TABLE_NAME, String sql) {
HashMap<String, String> table = new HashMap<String, String>();
if(sql == null)
sql = "";
String selectQuery = "SELECT * FROM " + TABLE_NAME + " " + sql;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
String[] columns = null;
switch(TABLE_NAME ){
case "projects":
columns = dbTables.projectsColumns;
break;
}
// Move to first row
cursor.moveToFirst();
if (cursor.getCount() > 0) {
int n=1;
for(int i=0; i<columns.length; i++){
table.put(columns[i], cursor.getString(n));
n++;
}
}
//move to the next row
cursor.moveToNext();
cursor.close();
db.close();
// return user
Log.d(TAG, "Fetching " + TABLE_NAME + " from Sqlite: " + table.toString());
return table;
}
数据库调用在一个片段中进行,代码如下。
HashMap<String, String> projects = db.fetchResults(dbTables.TABLE_PROJECTS, null);
for (String key : projects.keySet()) {
if(key == "projectname"){
System.out.println("Key: " + key + ", Value: " + projects.get(key));
menuList.add(projects.get(key));
}
}
rawQuery
之后调试和检查cursor
的值吗? - mrtntable
,它应该存储了您表中的所有值。 - mrtn