本文介绍了将图像从FilePicker / Intent复制到另一个目录的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试图将Image i从Intent复制到另一个目录。但我不能得到它的工作。需要帮助。
我的Logcat：
56：22.778 31620-31620 / com.example.krupal.sqlitetest I /编舞：跳过42帧！应用程序可能在其主线程上做太多的工作。
04-29 14：56：24.944 31620-31633 / com.example.krupal.sqlitetest W / EGL_emulation：eglSurfaceAttrib not implemented
04-29 14：56：24.944 31620-31633 / com.example。 krupal.sqlitetest W / OpenGLRenderer：无法在表面0x7f5170636740上设置EGL_SWAP_BEHAVIOR，错误= EGL_SUCCESS
04-29 14：56：26.370 31620-31633 / com.example.krupal.sqlitetest E /表面：getSlotFromBufferLocked：未知缓冲区： 0x7f517631a550
04-29 14：56：26.381 31620-31620 / com.example.krupal.sqlitetest W / InputEventReceiver：尝试完成输入事件，但输入事件接收器已处理。
04-29 14：56：26.381 31620-31620 / com.example.krupal.sqlitetest W / ViewRootImpl：删除根视图时删除事件：MotionEvent {action = ACTION_HOVER_ENTER，actionButton = 0，id [0] = 0，flags [0] = 322.27295，y [0] = 447.5，toolType [0] = TOOL_TYPE_FINGER，buttonState = 0，metaState = 0，flags = 0x0，edgeFlags = 0x0，pointerCount = 1，historySize = 4168947，downTime = 4168760，deviceId = 0，source = 0x1002}
04-29 14：56：26.381 31620-31620 / com.example.krupal.sqlitetest W / InputEventReceiver：尝试完成输入事件，事件接收器已经被处理。
04-29 14：56：26.381 31620-31620 / com.example.krupal.sqlitetest W / ViewRootImpl：删除根视图时删除事件：MotionEvent {action = ACTION_HOVER_ENTER，actionButton = 0，id [0] = 0，flags [0] = 322.27295，y [0] = 447.5，toolType [0] = TOOL_TYPE_FINGER，buttonState = 0，metaState = 0，flags = 0x0，edgeFlags = 0x0，pointerCount = 1，historySize = 4168947，downTime = 4168760，deviceId = 0，source = 0x1002}
04-29 14：56：26.381 31620-31620 / com.example.krupal.sqlitetest W / InputEventReceiver：尝试完成输入事件，事件接收器已经被处理。
04-29 14：56：26.381 31620-31620 / com.example.krupal.sqlitetest W / ViewRootImpl：删除根视图时删除事件：MotionEvent {action = ACTION_HOVER_MOVE，actionButton = 0，id [0] = 0，flags [0] = 322.27295，y [0] = 447.5，toolType [0] = TOOL_TYPE_FINGER，buttonState = 0，metaState = 0，flags = 0x0，edgeFlags = 0x0，pointerCount = 1，historySize = 4168947，downTime = 4168760，deviceId = 0，source = 0x1002}
04-29 14：56：26.381 31620-31620 / com.example.krupal.sqlitetest W / InputEventReceiver：尝试完成输入事件，事件接收器已经被处理。
04-29 14：56：27.652 31620-31633 / com.example.krupal.sqlitetest E / Surface：getSlotFromBufferLocked：unknown buffer：0x7f517631a710
04-29 14：56：29.935 31620-31630 / com .example.krupal.sqlitetest I / art：后台粘性并发标记扫描GC释放7247（862KB）AllocSpace对象，0（0B）LOS对象，0％免费，10MB / 10MB，暂停10.778ms总计53.218ms
04 -29 14：56：30.051 31620-31620 / com.example.krupal.sqlitetest D / BuildVersion：Build version> = 19
04-29 14：56：30.070 31620-31620 / com.example.krupal。 sqlitetest D / AndroidRuntime：关闭VM
---------崩溃开始
04-29 14：56：30.071 31620-31620 / com。 example.krupal.sqlitetest E / AndroidRuntime：FATAL EXCEPTION：main
进程：com.example.krupal.sqlitetest，PID：31620
** java.lang.RuntimeException：传递结果失败ResultInfo {who = null ，request = 1，result = -1，data = Intent {dat = content：//com.android.externalstorage.documents/document/primary：Download / 2015-09-09.jpg flg = 0x1}} to activity {com .example.krupal.sqlitetest / com.example.krupal.sqlitetest.MainActivity}：java.lang.NullPointerException：尝试在空对象引用上调用虚拟方法'char [] java.lang.String.toCharArray（）'
at android.app.ActivityThread.deliverResults（ActivityThread.java:3699）
在android.app.ActivityThread.handleSendResult（ActivityThread.java:3742）
在android.app.ActivityThread.- wrap16（ActivityThread.java）
在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1393）
在android.os.Handler.dispatchMessage（Handler.java:102）
在android.os.Looper.loop（Looper.java:148）
在android.app.ActivityThread.main（ActivityThread.java:5417）
在java.lang.reflect.Method.invoke（Native方法）
at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:726）
at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:616）
Caused by：java.lang.NullPointerException：尝试在空对象引用上调用虚拟方法'char [] java.lang.String.toCharArray（）'
at java.io.File.fixSlashes File.java:183）
at java.io.File。< init>（File.java:130）
at com.example.krupal.sqlitetest.MainActivity.onActivityResult（MainActivity.java:160 ）
at android.app.Activity.dispatchActivityResult（Activity.java:6428）
在android.app.ActivityThread.deliverResults（ActivityThread.java:3695）
在android.app.ActivityThread。 handleSendResult（ActivityThread.java:3742）
在android.app.ActivityThread.-wrap16（ActivityThread.java）
在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1393）
在android.os.Handler.dispatchMessage（Handler.java:102）
在android.os.Looper.loop（Looper.java:148）
在android.app.ActivityThread.main（ActivityThread。 java：5417）
在java.lang.reflect.Method.invoke（本地方法）
at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:726）
at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:616）
04-29 14：56：32.316 31620-31620 / com.example.krupal.sqlitetest I /过程：发送信号。 PID：31620 SIG：9
资料来源：
protected void onActivityResult（int requestCode，int resultCode，Intent data）{
super.onActivityResult（requestCode，resultCode，data）;
if（resultCode == Activity.RESULT_OK）{
switch（requestCode）{
case SELECT_PICTURE：{
Uri selectedImageURI = data.getData（）;
if（Build.VERSION.SDK_INT< 19）{
String selectedImagePath = getPath（selectedImageURI）;
Bitmap bitmap = BitmapFactory.decodeFile（selectedImagePath）;
avatar.setImageBitmap（bitmap）;
copyImageToInternalStorage（new File（getPath（selectedImageURI）））;
Log.d（BuildVersion，Build version< 19）;
} else {
ParcelFileDescriptor parcelFileDescriptor;
try {
parcelFileDescriptor = getContentResolver（）。openFileDescriptor（selectedImageURI，r）;
FileDescriptor fileDescriptor = null;
if（parcelFileDescriptor！= null）{
fileDescriptor = parcelFileDescriptor.getFileDescriptor（）;
}
Bitmap image = BitmapFactory.decodeFileDescriptor（fileDescriptor）;
avatar.setImageBitmap（image）;
Log.d（BuildVersion，Build version> = 19）;
copyImageToInternalStorage（new File（getPath（selectedImageURI）））;
} catch（FileNotFoundException e）{
e.printStackTrace（）;
}
}
break;
}
（其他）
}
复制方法：
private void copyImageToInternalStorage（File sourcefile）{
String timeStamp = new SimpleDateFormat（ddMMyyyy_HHmmss）。format日期（））;
文件夹= getExternalFilesDir（ImageDatabase）;
文件file =新文件（文件夹，IMG _+ timeStamp +。jpg）;
if（！sourcefile.exists（））{
return;
}
FileChannel source = null;
FileChannel dest = null;
try {
source = new FileInputStream（sourcefile）.getChannel（）;
dest = new FileOutputStream（file）.getChannel（）;
if（source！= null&& dest！= null）{
dest.transferFrom（source，0，source.size（））;
}
if（source！= null）{
source.close（）;
}
if（dest！= null）{
dest.close（）;
}
} catch（FileNotFoundException e）{
e.printStackTrace（）;
} catch（IOException e）{
e.printStackTrace（）;
}
}
GetPath方法：
public String getPath（Uri uri）{
String [] projection = {MediaStore.Images.Media.DATA};
//游标cursor = managedQuery（uri，projection，null，null，null）;
@SuppressWarnings（deprecation）
Cursor cursor = managedQuery（uri，projection，null，null，null）;
int column_index = cursor.getColumnIndexOrThrow（MediaStore.Images.Media.DATA）;
cursor.moveToFirst（）;
return cursor.getString（column_index）;
}
但这是给我NullPointerException。需要改变什么？
解决方案
这是一个工作代码，我已经用于点击图像后复制文件。您必须先为其创建目录结构。
@Override
protected void onActivityResult（int requestCode，int resultCode ，Intent data）{
super.onActivityResult（requestCode，resultCode，data）;
if（resultCode == RESULT_OK）{
switch（requestCode）{
case CLICK_PHOTO：
imageUri = data.getData（）;
path = Utils.getRealPathFromURI（Photos.this，imageUri）;
picturePath = path.toString（）;
fileName = picturePath.substring（picturePath.lastIndexOf（/）+ 1）;
mFile = new File（Utils.getPath（getDIR），fileName）;
try {
copyFile（new File（picturePath），mFile）;
} catch（IOException e）{
e.printStackTrace（）;
}
saveBitmapToFile（mFile）;
PhotoBeans bean = new PhotoBeans（）;
bean.setThumbImageUrl（mFile.getAbsolutePath（））;
bean.setIsImageSelected（false）;
arrayListPhoto.add（bean）;
adapter.notifyDataSetChanged（）; //这将尝试加载您的新图像
gvImages.invalidateViews（）; // then you are refreshing views and setting the adapter again below
gvImages.setAdapter（adapter）;
//初始化适配器
break;
case SELECT_PHOTO：
imageUri = data.getData（）;
path = Utils.getRealPathFromURI（Photos.this，imageUri）;
picturePath = path.toString（）;
fileName = picturePath.substring（picturePath.lastIndexOf（/）+ 1）;
mFile = new File（Utils.getPath（getDIR），fileName）;
try {
copyFile（new File（picturePath），mFile）;
} catch（IOException e）{
e.printStackTrace（）;
}
saveBitmapToFile（mFile）;
PhotoBeans beans = new PhotoBeans（）;
beans.setThumbImageUrl（mFile.getAbsolutePath（））;
beans.setIsImageSelected（false）;
arrayListPhoto.add（beans）;
adapter.notifyDataSetChanged（）; //这将尝试加载您的新图像
gvImages.invalidateViews（）; // then you are refreshing views and setting the adapter again below
gvImages.setAdapter（adapter）;
//初始化适配器
break;
}
}
}
CopyFile ）
private void copyFile（File sourceFile，File destFile）throws IOException {
//创建现有文件
if（！sourceFile.exists（））{
return;
}
FileChannel source = null;
FileChannel destination = null;
source = new FileInputStream（sourceFile）.getChannel（）;
destination = new FileOutputStream（destFile）.getChannel（）;
if（destination！= null&& source！= null）{
destination.transferFrom（source，0，source.size（））;
}
if（source！= null）{
source.close（）;
}
if（destination！= null）{
destination.close（）;
}
}
目录结构
private void createDirectoryStructure（）{
try {
createDirectory（Environment.getExternalStorageDirectory（）+，YourDirecrtoryName）;
createDirectory（Environment.getExternalStorageDirectory（）+/+YourDirecrtoryName，FolderInsideDirectory）;
} catch（Exception e）{
e.printStackTrace（）;
}
}
private void createDirectory（String filePath，String directoryName）{
try {
File mfile = new File（filePath，directoryName）;
if（！mfile.exists（））{
mfile.mkdirs（）;
Log.e（In error，createDirectory）;
} else {
Log.e（In nottt error，createDirectory）;
}
} catch（Exception e）{
e.printStackTrace（）;
}
}
Utils.getPath（）
public static String getPath（String getDIR）{
String path =;
if（Environment.getExternalStorageState（）。equals（
Environment.MEDIA_MOUNTED））{
path = Environment.getExternalStorageDirectory（）。getAbsolutePath（）;
}
if（getDIR.equalsIgnoreCase（images））{
return path +/ YourDirectoryName / YourDirectoryName Images;
} else if（getDIR.equalsIgnoreCase（videos））{
return path +/ YourDirectoryName / YourDirectoryName Videos;
} else {
return path +/ YourDirectoryName / YourDirectoryName Documents;
}
}
从Uri获取图像的路径。 / p>
public static String getRealPathFromURI（Context context，Uri contentUri）{
Cursor cursor = null;
try {
String [] proj = {MediaStore.Images.Media.DATA};
cursor = context.getContentResolver（）。query（contentUri，proj，null，null，null）;
Log.e（Cursor，+ cursor）;
if（cursor！= null）{
int column_index = cursor.getColumnIndexOrThrow（MediaStore.Images.Media.DATA）;
cursor.moveToFirst（）;
return cursor.getString（column_index）;
}
else {
返回null;
}
} finally {
if（cursor！= null）{
cursor.close（）;
}
}
}
希望这有助于： / p>
I am trying to copy Image i receive from Intent to another directory. But I am unable to get it working yet. Need Help.
My Logcat:
04-29 14:56:22.778 31620-31620/com.example.krupal.sqlitetest I/Choreographer: Skipped 42 frames! The application may be doing too much work on its main thread.
04-29 14:56:24.944 31620-31633/com.example.krupal.sqlitetest W/EGL_emulation: eglSurfaceAttrib not implemented
04-29 14:56:24.944 31620-31633/com.example.krupal.sqlitetest W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0x7f5170636740, error=EGL_SUCCESS
04-29 14:56:26.370 31620-31633/com.example.krupal.sqlitetest E/Surface: getSlotFromBufferLocked: unknown buffer: 0x7f517631a550
04-29 14:56:26.381 31620-31620/com.example.krupal.sqlitetest W/InputEventReceiver: Attempted to finish an input event but the input event receiver has already been disposed.
04-29 14:56:26.381 31620-31620/com.example.krupal.sqlitetest W/ViewRootImpl: Dropping event due to root view being removed: MotionEvent { action=ACTION_HOVER_ENTER, actionButton=0, id[0]=0, x[0]=322.27295, y[0]=447.5, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=4168947, downTime=4168760, deviceId=0, source=0x1002 }
04-29 14:56:26.381 31620-31620/com.example.krupal.sqlitetest W/InputEventReceiver: Attempted to finish an input event but the input event receiver has already been disposed.
04-29 14:56:26.381 31620-31620/com.example.krupal.sqlitetest W/ViewRootImpl: Dropping event due to root view being removed: MotionEvent { action=ACTION_HOVER_ENTER, actionButton=0, id[0]=0, x[0]=322.27295, y[0]=447.5, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=4168947, downTime=4168760, deviceId=0, source=0x1002 }
04-29 14:56:26.381 31620-31620/com.example.krupal.sqlitetest W/InputEventReceiver: Attempted to finish an input event but the input event receiver has already been disposed.
04-29 14:56:26.381 31620-31620/com.example.krupal.sqlitetest W/ViewRootImpl: Dropping event due to root view being removed: MotionEvent { action=ACTION_HOVER_MOVE, actionButton=0, id[0]=0, x[0]=322.27295, y[0]=447.5, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=4168947, downTime=4168760, deviceId=0, source=0x1002 }
04-29 14:56:26.381 31620-31620/com.example.krupal.sqlitetest W/InputEventReceiver: Attempted to finish an input event but the input event receiver has already been disposed.
04-29 14:56:27.652 31620-31633/com.example.krupal.sqlitetest E/Surface: getSlotFromBufferLocked: unknown buffer: 0x7f517631a710
04-29 14:56:29.935 31620-31630/com.example.krupal.sqlitetest I/art: Background sticky concurrent mark sweep GC freed 7247(862KB) AllocSpace objects, 0(0B) LOS objects, 0% free, 10MB/10MB, paused 10.778ms total 53.218ms
04-29 14:56:30.051 31620-31620/com.example.krupal.sqlitetest D/BuildVersion: Build version >=19
04-29 14:56:30.070 31620-31620/com.example.krupal.sqlitetest D/AndroidRuntime: Shutting down VM
--------- beginning of crash
04-29 14:56:30.071 31620-31620/com.example.krupal.sqlitetest E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.krupal.sqlitetest, PID: 31620
** java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://com.android.externalstorage.documents/document/primary:Download/2015-09-09.jpg flg=0x1 }} to activity {com.example.krupal.sqlitetest/com.example.krupal.sqlitetest.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'char[] java.lang.String.toCharArray()' on a null object reference **
at android.app.ActivityThread.deliverResults(ActivityThread.java:3699)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3742)
at android.app.ActivityThread.-wrap16(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'char[] java.lang.String.toCharArray()' on a null object reference
at java.io.File.fixSlashes(File.java:183)
at java.io.File.<init>(File.java:130)
at com.example.krupal.sqlitetest.MainActivity.onActivityResult(MainActivity.java:160)
at android.app.Activity.dispatchActivityResult(Activity.java:6428)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3695)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3742)
at android.app.ActivityThread.-wrap16(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1393)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
04-29 14:56:32.316 31620-31620/com.example.krupal.sqlitetest I/Process: Sending signal. PID: 31620 SIG: 9
Source:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {
switch (requestCode) {
case SELECT_PICTURE: {
Uri selectedImageURI = data.getData();
if (Build.VERSION.SDK_INT < 19) {
String selectedImagePath = getPath(selectedImageURI);
Bitmap bitmap = BitmapFactory.decodeFile(selectedImagePath);
avatar.setImageBitmap(bitmap);
copyImageToInternalStorage(new File(getPath(selectedImageURI)));
Log.d("BuildVersion","Build version <19");
} else {
ParcelFileDescriptor parcelFileDescriptor;
try {
parcelFileDescriptor = getContentResolver().openFileDescriptor(selectedImageURI, "r");
FileDescriptor fileDescriptor = null;
if (parcelFileDescriptor != null) {
fileDescriptor = parcelFileDescriptor.getFileDescriptor();
}
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
avatar.setImageBitmap(image);
Log.d("BuildVersion","Build version >=19");
copyImageToInternalStorage(new File(getPath(selectedImageURI)));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
break;
}
(everything else)
}
Copy Method:
private void copyImageToInternalStorage(File sourcefile) {
String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date());
File folder = getExternalFilesDir("ImageDatabase");
File file = new File(folder, "IMG_"+timeStamp+".jpg");
if(!sourcefile.exists()){
return;
}
FileChannel source = null;
FileChannel dest = null;
try {
source = new FileInputStream(sourcefile).getChannel();
dest = new FileOutputStream(file).getChannel();
if(source != null && dest != null){
dest.transferFrom(source,0,source.size());
}
if(source != null){
source.close();
}
if(dest != null){
dest.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
GetPath Method:
public String getPath(Uri uri) {
String[] projection = {MediaStore.Images.Media.DATA};
// Cursor cursor=managedQuery(uri, projection, null, null, null);
@SuppressWarnings("deprecation")
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
But this is giving me NullPointerException. What needs to be changed?
解决方案
This is a working code which i Have used to copy the file after clicking an image. You have to create a directory structure for it before.
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case CLICK_PHOTO:
imageUri = data.getData();
path = Utils.getRealPathFromURI(Photos.this, imageUri);
picturePath = path.toString();
fileName = picturePath.substring(picturePath.lastIndexOf("/") + 1);
mFile = new File(Utils.getPath(getDIR), fileName);
try {
copyFile(new File(picturePath), mFile);
} catch (IOException e) {
e.printStackTrace();
}
saveBitmapToFile(mFile);
PhotoBeans bean = new PhotoBeans();
bean.setThumbImageUrl(mFile.getAbsolutePath());
bean.setIsImageSelected(false);
arrayListPhoto.add(bean);
adapter.notifyDataSetChanged(); // This will try to load your new Image
gvImages.invalidateViews(); // then you are refreshing views and setting the adapter again below
gvImages.setAdapter(adapter);
//Initialize Adapter
break;
case SELECT_PHOTO:
imageUri = data.getData();
path = Utils.getRealPathFromURI(Photos.this, imageUri);
picturePath = path.toString();
fileName = picturePath.substring(picturePath.lastIndexOf("/") + 1);
mFile = new File(Utils.getPath(getDIR), fileName);
try {
copyFile(new File(picturePath), mFile);
} catch (IOException e) {
e.printStackTrace();
}
saveBitmapToFile(mFile);
PhotoBeans beans = new PhotoBeans();
beans.setThumbImageUrl(mFile.getAbsolutePath());
beans.setIsImageSelected(false);
arrayListPhoto.add(beans);
adapter.notifyDataSetChanged(); // This will try to load your new Image
gvImages.invalidateViews(); // then you are refreshing views and setting the adapter again below
gvImages.setAdapter(adapter);
//Initialize Adapter
break;
}
}
}
CopyFile()
private void copyFile(File sourceFile, File destFile) throws IOException {
//Creates a copy of the existing file
if (!sourceFile.exists()) {
return;
}
FileChannel source = null;
FileChannel destination = null;
source = new FileInputStream(sourceFile).getChannel();
destination = new FileOutputStream(destFile).getChannel();
if (destination != null && source != null) {
destination.transferFrom(source, 0, source.size());
}
if (source != null) {
source.close();
}
if (destination != null) {
destination.close();
}
}
Directory Structure
private void createDirectoryStructure() {
try {
createDirectory(Environment.getExternalStorageDirectory() + "", "YourDirecrtoryName");
createDirectory(Environment.getExternalStorageDirectory() + "/" + "YourDirecrtoryName", "FolderInsideDirectory");
} catch (Exception e) {
e.printStackTrace();
}
}
private void createDirectory(String filePath, String directoryName) {
try {
File mfile= new File(filePath, directoryName);
if (!mfile.exists()) {
mfile.mkdirs();
Log.e("In error", "createDirectory");
} else {
Log.e("In nottt error", "createDirectory");
}
} catch (Exception e) {
e.printStackTrace();
}
}
Utils.getPath()
public static String getPath(String getDIR) {
String path = "";
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
path = Environment.getExternalStorageDirectory().getAbsolutePath();
}
if(getDIR.equalsIgnoreCase("images")) {
return path + "/YourDirectoryName/YourDirectoryName Images";
}else if(getDIR.equalsIgnoreCase("videos")){
return path + "/YourDirectoryName/YourDirectoryName Videos";
}else {
return path + "/YourDirectoryName/YourDirectoryName Documents";
}
}
To get the path of the image from Uri.
public static String getRealPathFromURI(Context context, Uri contentUri) {
Cursor cursor = null;
try {
String[] proj = {MediaStore.Images.Media.DATA};
cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
Log.e("Cursor", "" + cursor);
if (cursor != null) {
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
else {
return null;
}
} finally {
if (cursor != null) {
cursor.close();
}
}
}
Hope this Helps :)
这篇关于将图像从FilePicker / Intent复制到另一个目录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！