Environment.getExternalStorageDirectory（）。getAbsolutePath（）不工作并给予/存储 [英] Environment.getExternalStorageDirectory().getAbsolutePath() not working and giving /storage

问题描述

我的code

  MYDB = openOrCreateDatabase（/ SD卡/ FashionGirl / ImagesDB.db，Context.MODE_PRIVATE，NULL）;
MYDB = openOrCreateDatabase（DBPATH，Context.MODE_PRIVATE，NULL）;
 

完美地工作，但被给予警告不要硬code/ SD卡/;使用Environment.getExternalStorageDirectory（）的getPath（），而不是

所以，我想，

 字符串DBPATH = Environment.getExternalStorageDirectory（）getAbsolutePath（）+FashionGirl / ImagesDB.db。
MYDB = openOrCreateDatabase（DBPATH，Context.MODE_PRIVATE，NULL）;
 

但奇怪的是，它不工作，在那里Environment.getExternalStorageDirectory（）。getAbsolutePath（）的值为 /存储

因此​​，它给错误，

  19 12-17：32：02.230：E / SqliteDatabaseCpp（15620）：sqlite3_open_v2（/ storageFashionGirl / ImagesDB.db，＆安培;手柄，6，NULL）失败
12-17 19：32：02.230：E / SQLiteDatabase（15620）：无法打开数据库。关闭它。
12-17 19：32：02.230：E / SQLiteDatabase（15620）：android.database.sqlite.SQLiteCantOpenDatabaseException：无法打开数据库文件
12-17 19：32：02.230：E / SQLiteDatabase（15620）：在android.database.sqlite.SQLiteDatabase.dbopen（本机方法）
12-17 19：32：02.230：E / SQLiteDatabase（15620）：在android.database.sqlite.SQLiteDatabase.openDatabase（SQLiteDatabase.java:983）
12-17 19：32：02.230：E / SQLiteDatabase（15620）：在android.database.sqlite.SQLiteDatabase.openDatabase（SQLiteDatabase.java:956）
12-17 19：32：02.230：E / SQLiteDatabase（15620）：在android.database.sqlite.SQLiteDatabase.openDatabase（SQLiteDatabase.java:932）
 

那么，为什么一些由Android不工作建议，我该怎么办？

解决方案

 字符串DBPATH = Environment.getExternalStorageDirectory（）getAbsolutePath（）+FashionGirl / ImagesDB.db。
MYDB = openOrCreateDatabase（DBPATH，Context.MODE_PRIVATE，NULL）;
 

请不要使用串联构造的文件路径。尝试：

 文件DBPATH =新的文件（Environment.getExternalStorageDirectory（），FashionGirl / ImagesDB.db）;
MYDB = openOrCreateDatabase（dbPath.getAbsolutePath（），Context.MODE_PRIVATE，NULL）;
 

  

但奇怪的是，它不工作，在那里Environment.getExternalStorageDirectory（）。getAbsolutePath（）有值/存储

这是因为 / SD卡已去precated了近三年。

My code

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

worked perfectly, but was giving warning Do not hardcode "/sdcard/"; use Environment.getExternalStorageDirectory().getPath() instead

So I tried,

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

But strangely, its not working, where Environment.getExternalStorageDirectory().getAbsolutePath() has value /storage

So its giving error,

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)

So why something recommended by Android is not working, what should I do?

解决方案

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

Please do not use concatenation for constructing file paths. Try:

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

But strangely, its not working, where Environment.getExternalStorageDirectory().getAbsolutePath() has value /storage

That is because /sdcard has been deprecated for nearly three years.

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