我想从sdcard文件路径获取文件名。例如 ：/storage/sdcard0/DCIM/Camera/1414240995236.jpg I want get 1414240995236.jpg 我已经编写了获取相同代码的代码，但是它不起作用。 请帮忙。

下面是我的代码：

@Override

protected void onActivityResult( int requestCode, int resultCode, Intent data)

{

if ( requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {

if ( resultCode == RESULT_OK) {

/*********** Load Captured Image And Data Start ****************/

String imageId = convertImageUriToFile( imageUri,CameraActivity);

// Create and excecute AsyncTask to load capture image

new LoadImagesFromSDCard().execute(""+imageId);

/*********** Load Captured Image And Data End ****************/

} else if ( resultCode == RESULT_CANCELED) {

Toast.makeText(this, " Picture was not taken ", Toast.LENGTH_SHORT).show();

} else {

Toast.makeText(this, " Picture was not taken ", Toast.LENGTH_SHORT).show();

}

}

}

/************ Convert Image Uri path to physical path **************/

public static String convertImageUriToFile ( Uri imageUri, Activity activity ) {

Cursor cursor = null;

int imageID = 0;

try {

/*********** Which columns values want to get *******/

String [] proj={

MediaStore.Images.Media.DATA,

MediaStore.Images.Media._ID,

MediaStore.Images.Thumbnails._ID,

MediaStore.Images.ImageColumns.ORIENTATION

};

cursor = activity.managedQuery(

imageUri, // Get data for specific image URI

proj, // Which columns to return

null, // WHERE clause; which rows to return (all rows)

null, // WHERE clause selection arguments (none)

null // Order-by clause (ascending by name)

);

// Get Query Data

int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);

int columnIndexThumb = cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);

int file_ColumnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

//int orientation_ColumnIndex = cursor.

// getColumnIndexOrThrow(MediaStore.Images.ImageColumns.ORIENTATION);

int size = cursor.getCount();

/******* If size is 0, there are no images on the SD Card. *****/

if (size == 0) {

imageDetails.setText("No Image");

}

else

{

int thumbID = 0;

if (cursor.moveToFirst()) {

/**************** Captured image details ************/

/***** Used to show image on view in LoadImagesFromSDCard class ******/

imageID = cursor.getInt(columnIndex);

thumbID = cursor.getInt(columnIndexThumb);

String Path = cursor.getString(file_ColumnIndex);

//String orientation = cursor.getString(orientation_ColumnIndex);

String CapturedImageDetails = " CapturedImageDetails : \n\n"

+" ImageID :"+imageID+"\n"

+" ThumbID :"+thumbID+"\n"

+" Path :"+Path+"\n";

full_path_name=Path;

//this is my path

//Path :/storage/sdcard0/DCIM/Camera/1414240995236.jpg i want get 1414240995236.jpg

// Show Captured Image detail on activity

imageDetails.setText(Path);

}

}

} finally {

if (cursor != null) {

cursor.close();

}

}

// Return Captured Image ImageID ( By this ImageID Image will load from sdcard )

return ""+imageID;

}

/**

* Async task for loading the images from the SD card.

*

* @author Android Example

*

*/

// Class with extends AsyncTask class

public class LoadImagesFromSDCard extends AsyncTask {

private ProgressDialog Dialog = new ProgressDialog(CameraPhotoCapture.this);

Bitmap mBitmap;

protected void onPreExecute() {

/****** NOTE: You can call UI Element here. *****/

// Progress Dialog

Dialog.setMessage(" Loading image from Sdcard..");

Dialog.show();

}

// Call after onPreExecute method

protected Void doInBackground(String... urls) {

Bitmap bitmap = null;

Bitmap newBitmap = null;

Uri uri = null;

try {

/** Uri.withAppendedPath Method Description

* Parameters

* baseUri Uri to append path segment to

* pathSegment encoded path segment to append

* Returns

* a new Uri based on baseUri with the given segment appended to the path

*/

uri = Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "" + urls[0]);

/************** Decode an input stream into a bitmap. *********/

bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));

if (bitmap != null) {

/********* Creates a new bitmap, scaled from an existing bitmap. ***********/

newBitmap = Bitmap.createScaledBitmap(bitmap, 170, 170, true);

bitmap.recycle();

if (newBitmap != null) {

mBitmap = newBitmap;

}

}

} catch (IOException e) {

// Error fetching image, try to recover

/********* Cancel execution of this task. **********/

cancel(true);

}

return null;

}

protected void onPostExecute(Void unused) {

// NOTE: You can call UI Element here.

// Close progress dialog

Dialog.dismiss();

if(mBitmap != null)

{

// Set Image to ImageView

showImg.setImageBitmap(mBitmap);

}

}

}