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한 위치에서 다른 위치로 파일을 복사하려고했습니다. 내 이해에 내 프로그램의 복사 메커니즘이 제대로 작동하지만, 나는 끊임없이 파일 경로 오류가 발생하는 응용 프로그램을 실행할 때. xbmc 앱 내에서 데이터 파일로 작업하고 있습니다.Android 파일 복사 중 : 경로 오류
AssetManager -> CIP 경로 exsit하지 addDefaultAssets /data/data/org.xbmc.xbmc/.xbmc/userdata/guisettings.bak : ENOENT (없음 같은 파일 또는 디렉토리)
: 실패를 열지문자열 경로에 대한 File 개체를 만들 때 문제가 발생하는 것 같습니다. 다음은 프로그램의 해당 부분에 대한 코드 스 니펫입니다.
위의 오류가 계속 발생해도 계속 액세스합니다. 필자는 File, FileInputStream 및 Uri 라이브러리를 사용하여 파일 경로를 얻으려고했습니다. 쓰기 권한에 문제가 있거나 파일 경로를 올바르게 지정하지 않았습니까? 문제가 코드 내의 다른 곳에있을 경우를 대비하여 전체 솔루션을 게시하고 있습니다.
public class myActivity extends Activity {
private static final String TAG = "myActivity.java";
//The package name representing the application directory that is to be accessed
String packageName = "org.xbmc.xbmc";
//The input filename to read and copy
String inputFileName = "guisettings.bak";
//The output filename to append to
String outputFileName = "guisettings.xml";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
//Check the status of the external storage
if(isExternalReady()) {
//The external file system is ready
//Start the specific file operation
restoreFile();
} else {
//Not ready. Create a Broadcast Receiver and wait for the filesystem to mount
BroadcastReceiver mExternalInfoReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context arg0, Intent intent) {
//The external filesystem is now mounted
//Start the specific file operation
restoreFile();
}
};
//Get the IntentFilter Media Mounted
IntentFilter filter = new IntentFilter(Intent.ACTION_MEDIA_MOUNTED);
//Specify the filesystem data type
filter.addDataScheme("file");
//Register the receiver as "mExternalInfoReceiver" with the Media Mount filter
registerReceiver(mExternalInfoReceiver, new IntentFilter(filter));
}
}
//Restore the specific xml file
public void restoreFile() {
/*
//Get the internal storage of this app (Android/data/com.website.appname/files/)
String internalStorage = Environment.getFilesDir();
//Get the external storage path now that it is available
String externalStorage = Environment.getExternalStorageDirectory().toString();
//The directory of the file desired
String filePath = "Android/data/org.xbmc.xbmc/files/.xbmc/userdata/";
*/
//The information of the desired package
ApplicationInfo desiredPackage;
//Get the path of the application data folder if the application exists
try {
//Get the info of the desired application package
desiredPackage = getPackageInfo(packageName);
} catch (Exception e) {
//Output the stack trace
e.printStackTrace();
//Stop the function
return;
}
//Get the data dir of the package
String rootPackageDir = desiredPackage.dataDir;
//The path to the file in the package
String packageFilePath = "/.xbmc/userdata/";
//Construct the complete path of the input and output files respectively
//based on the application path
String inputPath = String.format("%s%s%s", rootPackageDir, packageFilePath, inputFileName);
String outputPath = String.format("%s%s%s", rootPackageDir, packageFilePath, outputFileName);
try {
//Copy the input file to the output file
if(copyFile(inputPath, outputPath)) {
//The file has been successfully copied
//Exit the application
System.exit(0);
}
} catch (IOException e) { e.printStackTrace(); return; }
}
//Is the external storage ready?
public boolean isExternalReady() {
//Get the current state of the external storage
//Check if the state retrieved is equal to MOUNTED
Boolean isMounted = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
if(isMounted) {
//The external storage is ready
return true;
}
//The external storage is not ready
return false;
}
//Get the data dir of a specific app if it exists
public ApplicationInfo getPackageInfo(String packageName) throws PackageNotFoundException {
List<ApplicationInfo> packages;
PackageManager pm;
//Init the package manager as pm
pm = getPackageManager();
//Get all installed applications
packages = pm.getInstalledApplications(0);
//Get the ApplicationInfo as packageInfo from each packages
for(ApplicationInfo packageInfo:packages) {
//Check for a name that matches the packageName
if(packageInfo.packageName.equals(packageName)) {
//The package exists
return packageInfo;
}
}
//The package was not found
//Throw an exception
throw new PackageNotFoundException("Package not found");
}
//Copy a file from an input directory to an output directory
public boolean copyFile(String inputPath, String outputPath) throws IOException {
//Construct the input and output paths as File objects with respective read/write privileges
//File inputFile = new File("/data/data/org.xbmc.xbmc/files/.xbmc/userdata/guisettings.bak");
//File outputFile = new File("/data/data/org.xbmc.xbmc/files/.xbmc/userdata/guisettings.xml");
//File inputFile = getDir(inputPath, MODE_PRIVATE);
//File outputFile = getDir(outputPath, MODE_PRIVATE);
File inputFile = new File(inputPath);
File outputFile = new File(outputPath);
//Check if the input and output files exist
if(!inputFile.exists()) {
return false;
}
if(!outputFile.exists()) {
//Create the output file
new File(outputPath);
}
//Get the input read state
boolean canReadInput = inputFile.canRead();
//Get the output write state
boolean canWriteOutput = outputFile.canWrite();
//Check if the input file can be read and if the output file can be written
if(canReadInput && canWriteOutput) {
//Open respective input and output buffer streams
InputStream in = new FileInputStream(inputFile);
OutputStream out = new FileOutputStream(outputFile);
//Create a byte array
byte[] buffer = new byte[1024];
//The current position of the byte buffer
int bufferPosition;
//While the bufferPosition is reading the file 1024 bytes at a time (-1 = no longer reading)
while((bufferPosition = in.read(buffer)) != -1) {
//Append the current buffer in memory to the output file
//With a pointer offset of 0 and a count of the current bufferPosition
out.write(buffer, 0, bufferPosition);
}
//Close the file streams
in.close();
out.close();
return true;
}
return false;
}
//The Package Error Class
private class PackageNotFoundException extends Exception {
//If an error is thrown with a message parameter
PackageNotFoundException(String m) {
//Pass the message to the super Exception class
super(m);
}
}
}