问题描述
我想从SD卡的文件路径文件名。例如： /storage/sdcard0/DCIM/Camera/1414240995236.jpg我想要得到1414240995236.jpg 我已经写了code，以获取相同的，但它不工作。请大家帮帮忙。结果下面是我的code：
@覆盖保护无效的onActivityResult（INT申请code，INT结果code，意图数据）{ 如果（要求code == CAPTURE_IMAGE_ACTIVITY_REQUEST_ code）{ 如果（结果code == RESULT_OK）{ / ***********装入捕捉的图像和数据开始**************** / 字符串imageId = convertImageUriToFile（imageUri，CameraActivity）; //创建并excecute的AsyncTask加载捕获映像 新LoadImagesFromSDCard（）执行（+ imageId）; / ***********装入捕捉的图像和数据结束**************** / }否则如果（结果code == RESULT_CANCELED）{ Toast.makeText（这一点，照片是没有采取Toast.LENGTH_SHORT）.show（）; }其他{ Toast.makeText（这一点，照片是没有采取Toast.LENGTH_SHORT）.show（）; } }}/ ************转换图像URI路径到物理路径************** /公共静态字符串convertImageUriToFile（URI imageUri，活动活动）{ 光标光标= NULL; INT imageID = 0; 尝试{ / ***********的列值想得到******* / 的String [] = PROJ { MediaStore.Images.Media.DATA， MediaStore.Images.Media._ID， MediaStore.Images.Thumbnails._ID， MediaStore.Images.ImageColumns.ORIENTATION }; 光标= activity.managedQuery（ imageUri，//获取特定的图像数据URI PROJ，//哪些列返回 空，// WHERE子句;该行返回（所有行） 空，// WHERE子句选择参数（无） 空//订单by子句（按名称升序） ）; //获取查询数据 INT参数：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 =光标。 // getColumnIndexOrThrow（MediaStore.Images.ImageColumns.ORIENTATION）; INT大小= cursor.getCount（）; / *******如果大小为0，则对SD卡没有图像。 ***** / 如果（大小== 0）{ imageDetails.setText（无图）; } 其他 { INT thumbID = 0; 如果（cursor.moveToFirst（））{ / ****************捕获的图像细节************ / / *****用于显示在视图中LoadImagesFromSDCard一流的图像****** / imageID = cursor.getInt（参数：columnIndex）; thumbID = cursor.getInt（columnIndexThumb）; 字符串路径= cursor.getString（file_ColumnIndex）; //字符串方向= cursor.getString（orientation_ColumnIndex）; 字符串CapturedImageDetails =CapturedImageDetails：\\ n \\ n +ImageID：+ imageID +\\ n +ThumbID：+ thumbID +\\ n +路径：+路径+\\ n; full_path_name =路径; //这是我的路 //路径：/storage/sdcard0/DCIM/Camera/1414240995236.jpg我想要得到1414240995236.jpg //上的活动显示拍摄的图像细节 imageDetails.setText（路径）; } } } {最后 如果（指针！= NULL）{ cursor.close（）; } } //返回捕捉到的图像ImageID（通过这种ImageID图像从SD卡装载） 返回+ imageID;}/ ** *异步任务从SD卡中加载图像。 * * @author Android示例 * * ///使用类扩展的AsyncTask类公共类LoadImagesFromSDCard扩展的AsyncTask＆LT;弦乐，太虚，太虚＆GT; { 私人ProgressDialog对话=新ProgressDialog（CameraPhotoCapture.this）; 位图mBitmap; 在preExecute保护无效（）{ / ******注意：您可以在这里称之为UI元素。 ***** / //进度对话框 Dialog.setMessage（加载SD卡从形象..）; Dialog.show（）; } //后呼吁preExecute方法 保护无效doInBackground（字符串的URL ...）{ 位图位图= NULL; 位图newBitmap = NULL; URI URI = NULL; 尝试{ / ** Uri.withAppendedPath方法说明 *参数 *开放的基本URI追加路径段 * pathSegment EN codeD路径段追加 *回报 *新的URI的基础上与基本URI附加到路径的给定段 * / URI = Uri.withAppendedPath（MediaStore.Images.Media.EXTERNAL_CONTENT_URI，+网址[0]）; / **************德code的输入流中的位图。 ********* / 位= BitmapFactory.de codeStream（getContentResolver（）openInputStream（URI））; 如果（位图！= NULL）{ / *********创建一个新的位图，从现有的位图进行缩放。 *********** / newBitmap = Bitmap.createScaledBitmap（位图，170，170，TRUE）; bitmap.recycle（）; 如果（newBitmap！= NULL）{ mBitmap = newBitmap; } } }赶上（IOException异常五）{ //错误获取图像，尝试恢复 / *********取消对此任务的执行。 ********** / 取消（真）; } 返回null; } 保护无效onPostExecute（虚空未使用）{ //注意：您可以在这里称之为UI元素。 //关闭进度对话框 Dialog.dismiss（）; 如果（mBitmap！= NULL） { //设置图像到的ImageView showImg.setImageBitmap（mBitmap）; } }} 解决方案
我认为你可以使用子串梅索德从路径字符串获取文件的名称。
字符串PATH =：/存储/ sdcard0 / DCIM /摄像机/ 1414240995236.jpg;用一个临时字符串//它包含你image..im的路径.. 字符串文件名= path.substring（path.lastIndexOf（/）+ 1）; I want to get file name from sdcard file path.
e.g. :/storage/sdcard0/DCIM/Camera/1414240995236.jpg I want get 1414240995236.jpg
I have written the code to fetch the same but it is not working. Please help.
Below is my code:
@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<String, Void, Void> {
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);
}
}
}
解决方案
i think you can use substring methode to get name of file from the path string.
String path=":/storage/sdcard0/DCIM/Camera/1414240995236.jpg";//it contain your path of image..im using a temp string..
String filename=path.substring(path.lastIndexOf("/")+1);