我想从 PHP（服务器）下载 SQLITE 数据库并将其复制到 Android（客户端）的 assets 文件夹中。我没有得到所需的输出。谁能告诉我我在哪里做错或错过了什么？谢谢你的帮助。
代码：
boolean downloadDatabase(Context context) {
try {
Log.d("test", "downloading database");
URL url = new URL("http://10.0.2.2/SvcEnggPlanner/" + "Services.sqlite");
URLConnection ucon = url.openConnection();
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
ByteArrayBuffer baf = new ByteArrayBuffer(50);
int current = 0;
while ((current = bis.read()) != -1) {
baf.append((byte) current);
}
FileOutputStream fos = null;
fos = context.openFileOutput("Services.sqlite", Context.MODE_PRIVATE);
if(fos!=null){
fos.write(baf.toByteArray());
fos.close();
Log.d("test", "downloaded");
}
} catch (IOException e) {
Log.e("test", "downloadDatabase Error: " , e);
return false;
} catch (NullPointerException e) {
Log.e("test", "downloadDatabase Error: " , e);
return false;
} catch (Exception e){
Log.e("test", "downloadDatabase Error: " , e);
return false;
}
return true;
}
public void copyServerDatabase() {
SQLiteDatabase db = getReadableDatabase();
db.close();
OutputStream os = null;
InputStream is = null;
try {
Log.d("test", "Copying DB from server version into app");
is = context.openFileInput("Services.sqlite");
Log.d("test", ""+is);
os = new FileOutputStream("/data/data/com.sever/databases/");
Log.d("test", ""+os);
copyFile(os, is);
} catch (Exception e) {
Log.d("test", "Server Database was not found - did it download correctly?");
}
finally {
try {
if(os != null){
os.close();
}
if(is != null){
is.close();
}
} catch (IOException e) {
Log.d("test", "failed to close databases");
}
}
Log.d("test", "Done Copying DB from server");
}
private void copyFile(OutputStream os, InputStream is) throws IOException {
Log.d("test", "In CopyFile");
byte[] buffer = new byte[1024];
int length;
while((length = is.read(buffer))>0){
os.write(buffer, 0, length);
}
os.flush();
}
}