4

我的代码

myDb = openOrCreateDatabase("/sdcard/FashionGirl/ImagesDB.db", Context.MODE_PRIVATE, null);
myDb = openOrCreateDatabase(dbPath, Context.MODE_PRIVATE, null);

工作完美，但发出警告Do not hardcode "/sdcard/"; use Environment.getExternalStorageDirectory().getPath() instead

所以我尝试了，

String dbPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "FashionGirl/ImagesDB.db";
myDb = openOrCreateDatabase(dbPath, Context.MODE_PRIVATE, null);

但奇怪的是，它不起作用，其中 Environment.getExternalStorageDirectory().getAbsolutePath() 具有价值/storage

所以它给出错误，

12-17 19:32:02.230: E/SqliteDatabaseCpp(15620): sqlite3_open_v2("/storageFashionGirl/ImagesDB.db", &handle, 6, NULL) failed
12-17 19:32:02.230: E/SQLiteDatabase(15620): Failed to open the database. closing it.
12-17 19:32:02.230: E/SQLiteDatabase(15620): android.database.sqlite.SQLiteCantOpenDatabaseException: unable to open database file
12-17 19:32:02.230: E/SQLiteDatabase(15620):    at android.database.sqlite.SQLiteDatabase.dbopen(Native Method)
12-17 19:32:02.230: E/SQLiteDatabase(15620):    at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:983)
12-17 19:32:02.230: E/SQLiteDatabase(15620):    at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:956)
12-17 19:32:02.230: E/SQLiteDatabase(15620):    at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:932)

那么为什么Android推荐的东西不起作用，我该怎么办？

4

3 回答 3

5 
String dbPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "FashionGirl/ImagesDB.db";
myDb = openOrCreateDatabase(dbPath, Context.MODE_PRIVATE, null);

请不要使用连接来构建文件路径。尝试：

File dbPath = new File(Environment.getExternalStorageDirectory(), "FashionGirl/ImagesDB.db");
myDb = openOrCreateDatabase(dbPath.getAbsolutePath(), Context.MODE_PRIVATE, null);

但奇怪的是，它不起作用，其中 Environment.getExternalStorageDirectory().getAbsolutePath() 有值 /storage

那是因为/sdcard已经被弃用了将近三年。

于 2012-12-17T14:12:10.220 回答
2

在 Fashiongirl 之前添加/

String dbPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/FashionGirl/ImagesDB.db";
于 2012-12-17T14:10:16.257 回答
0 
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

listView = (ListView) findViewById(R.id.list);
List<Employee> employees = null;
try {
    XMLPullParserHandler parser = new XMLPullParserHandler();

    File f = new File("/mnt/extsd/kmls/mykml.kml");

    InputStream is = new FileInputStream(f);

            employees = parser.parse(is);

       ArrayAdapter<Employee> adapter = new ArrayAdapter<Employee>     

this,R.layout.list_item, employees);

    listView.setAdapter(adapter);

    } catch (IOException e) {
        e.printStackTrace();
    }
}

Note : "/mnt/extsd/kmls/mykml.kml" this is the complete path to reach my kml fiel.
   for this first you need to open your sdcard in your device then you find the path   
then the path need to insert into your app.

thanks
于 2013-11-21T14:20:03.040 回答