Android sd卡读取数据库实例代码

<span style="font-size:16px;"><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /></span> 

<span style="font-size:16px;">SQLiteDatabase db;   private final String DATABASE_PATH = android.os.Environment       .getExternalStorageDirectory().getAbsolutePath() + "/vote";   private String DATABASE_FILENAME = "db_vote.db";   // 初始化数据库   private SQLiteDatabase openDatabase() {     try {       String databaseFilename = DATABASE_PATH + "/" + DATABASE_FILENAME;       File dir = new File(DATABASE_PATH);       if (!dir.exists())         dir.mkdir();       if (!(new File(databaseFilename)).exists()) {         InputStream is = getResources().openRawResource(R.raw.db_vote);         FileOutputStream fos = new FileOutputStream(databaseFilename);         byte[] buffer = new byte[8192];         int count = 0;         while ((count = is.read(buffer)) > 0) {           fos.write(buffer, 0, count);         }         fos.close();         is.close();       }       db = SQLiteDatabase.openOrCreateDatabase(databaseFilename, null);       return db;     } catch (Exception e) {       e.printStackTrace();     }     return null;   }</span>