Android没有这样的文件或目录例外
我试图按照此教程https://developer.android.com/training/camera/photobasics.html#TaskPath拍摄图像并保存文件。 它会打开相机，拍摄照片，单击复选标记，然后崩溃。 我在StackOverflow上发现了几篇文章，并尝试了我可以理解的所有解决方案（它们分别是file.mkdirs() ， file.getParentFile().mkdirs() ）。
看来，即使它是一个RuntimeException，根本问题是IOException（我捕获并打印该消息）。 我正在使用Genymotion，不确定这是否相关。 我错过了什么让我无法创建文件？
我已经为我的清单添加了权限：
<uses-feature android:name="android.hardware.camera"
android:required="true" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
点击我的按钮：
public void onClick(View v) {
Log.d("DebugMySocks", "Change photo button clicked");
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
try {
// CHANGED THIS
mImageUri = FileProvider.getUriForFile(getApplicationContext(), getApplicationContext().getPackageName() + "socks", createImageFile());
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mImageUri);
} catch (Exception e) {
Log.d("DebugMySocks", "Error creating file " + e.getMessage());
}
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
和问题代码（我认为）：
private File createImageFile() throws IOException {
//ADDED THIS
int permissionCheck = ContextCompat.checkSelfPermission(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
5);
}
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Environment.getExternalStorageDirectory();
Log.d("DebugMySocks", "Storage directory is: " + storageDir);
File image = new File(Environment.getExternalStorageDirectory() + File.separator + "socks"+ File.separator + imageFileName);
Log.d("DebugMySocks", "getAbsoluteFile: " + image.getAbsoluteFile());
image.getParentFile().mkdirs();
image.mkdirs();
image.createNewFile();
//File image = File.createTempFile(
// imageFileName, /* prefix */
// ".jpg", /* suffix */
// storageDir /* directory */
//);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
LogCat的输出：
12-14 08:05:01.411 4967-4967/com.example.kevin.moresocksplease D/DebugMySocks: Change photo button clicked
12-14 08:05:01.412 4967-4967/com.example.kevin.moresocksplease D/DebugMySocks: Storage directory is: /storage/emulated/0
12-14 08:05:01.413 4967-4967/com.example.kevin.moresocksplease D/DebugMySocks: getAbsoluteFile: /storage/emulated/0/socks/JPEG_20171214_080501_
12-14 08:05:01.416 4967-4967/com.example.kevin.moresocksplease D/DebugMySocks: Error creating file No such file or directory
并且例外：
FATAL EXCEPTION: main
Process: com.example.kevin.moresocksplease, PID: 4967
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=111, result=-1, data=Intent { act=inline-data (has extras) }} to activity {com.example.kevin.moresocksplease/com.example.kevin.moresocksplease.EditProfileActivity}: java.lang.NullPointerException: uri
at android.app.ActivityThread.deliverResults(ActivityThread.java:4089)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4132)
at android.app.ActivityThread.-wrap20(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1533)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.NullPointerException: uri
at com.android.internal.util.Preconditions.checkNotNull(Preconditions.java:111)
at android.content.ContentResolver.notifyChange(ContentResolver.java:1714)
at android.content.ContentResolver.notifyChange(ContentResolver.java:1693)
at com.example.kevin.moresocksplease.EditProfileActivity.onActivityResult(EditProfileActivity.java:254)
at android.app.Activity.dispatchActivityResult(Activity.java:6932)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4085)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4132)
at android.app.ActivityThread.-wrap20(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1533)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
最后，包括因为它在异常堆栈中：
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.d("DebugMySocks", "onActivityResult in EditProfileActivity");
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == this.RESULT_OK) {
this.getContentResolver().notifyChange(mImageUri, null); // <-- THIS IS LINE 254!
ContentResolver cr = this.getContentResolver();
Bitmap bitmap;
try
{
bitmap = android.provider.MediaStore.Images.Media.getBitmap(cr, mImageUri);
mProfileImage.setImageBitmap(bitmap);
saveToFirebase(bitmap);
}
catch (Exception e)
{
Toast.makeText(this, "Failed to load", Toast.LENGTH_SHORT).show();
Log.d("DebugMySocks", "Failed to load", e);
}
}
}
我一直在绘制信息的其他链接：
File.createNewFile（）throws IOException没有这样的文件或目录
Android相机意图：如何获得全尺寸照片？
编辑1：
查看完这些之后，我将日志添加到mkdir请求中，并且它们都返回false。 据这位绅士说，这意味着目录已经存在，所以这只是创建失败的文件？ 在/ sdcard中创建目录失败
Log.d("DebugMySocks", "parentfile mkdirs: " + image.getParentFile().mkdirs());
Log.d("DebugMySocks", "image.mkdirs: " + image.mkdirs());
Log.d("DebugMySocks", "create file: " + image.createNewFile());
DebugMySocks: parentfile mkdirs: false
DebugMySocks: image.mkdirs: false
DebugMySocks: Error creating file No such file or directory
编辑2：我现在有：
public void onClick(View v) {
Log.d("DebugMySocks", "Change photo button clicked");
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
try {
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)== PackageManager.PERMISSION_GRANTED) {
mImageUri = FileProvider.getUriForFile(getApplicationContext(), getApplicationContext().getPackageName() + "socks", createImageFile());
} else {
Log.v("DebugMySocks","Permission is revoked");
ActivityCompat.requestPermissions(getParent(), new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
}
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mImageUri);
} catch (Exception e) {
Log.d("DebugMySocks", "Error creating file " + e.getMessage());
}
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case 0:
boolean permissionsGranted = true;
if (grantResults.length > 0 && permissions.length==grantResults.length) {
for (int i = 0; i < permissions.length; i++){
if (grantResults[i] != PackageManager.PERMISSION_GRANTED){
permissionsGranted=false;
}
}
} else {
permissionsGranted=false;
}
if(permissionsGranted){
try {
mImageUri = FileProvider.getUriForFile(getApplicationContext(), getApplicationContext().getPackageName() + "socks", createImageFile());
} catch (Exception e) {
Log.d("DebugMySocks", "Permissions granted but exception happened " + e.getMessage());
}
}
break;
}
}
但我得到Error creating file Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference
如果被用户授予，您需要检查权限。
private void checkPermission(){
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)== PackageManager.PERMISSION_GRANTED) {
createFile();
} else {
Log.v(TAG,"Permission is revoked");
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case 0:
boolean permissionsGranted = true;
if (grantResults.length > 0 && permissions.length==grantResults.length) {
for (int i = 0; i < permissions.length; i++){
if (grantResults[i] != PackageManager.PERMISSION_GRANTED){
permissionsGranted=false;
}
}
} else {
permissionsGranted=false;
}
if(permissionsGranted){
createFile();
}
break;
}
}
private void createFile(){
ContentResolver cr = this.getContentResolver();
Bitmap bitmap;
try{
bitmap = android.provider.MediaStore.Images.Media.getBitmap(cr, mImageUri);
mProfileImage.setImageBitmap(bitmap);
saveToFirebase(bitmap);
}catch (Exception e){
Toast.makeText(this, "Failed to load", Toast.LENGTH_SHORT).show();
Log.d("DebugMySocks", "Failed to load", e);
}
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.d("DebugMySocks", "onActivityResult in EditProfileActivity");
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == this.RESULT_OK) {
this.getContentResolver().notifyChange(mImageUri, null); // <-- THIS IS LINE 254!
checkPermission();
}
}