android-external-storage

问题 UPDATE: My initial question may be misleading so I want to rephrase it: I want to traverse through the hierarchy tree from an MTP connected device through Android's Storage Access Framework. I can't seem to achieve this because I get a SecurityException stating that a subnode is not a descendant of its parent node. Is there a way to workaround this issue? Or is this a known issue? Thanks. I'm writing an Android application that attempts to traverse and access documents through the hierarchy

问题 I'm trying to save images from the apps local data folders to external storage. My manifest contains the following (before the manifest's application tags): <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="23" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="18"/> When I try the following try { InputStream in = new FileInputStream(filePath); File outPath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY

问题 getExternalStorageDirectory() return SD card path on my phone. ( Huawei Y320 - android 4.2.2 ). now, how to get path Phone Storage path for all devices and all API? loot at bottom screenshot. 回答1: I'm using this method: public static final String SD_CARD = "sdCard"; public static final String EXTERNAL_SD_CARD = "externalSdCard"; private static final String ENV_SECONDARY_STORAGE = "SECONDARY_STORAGE"; public static Map<String, File> getAllStorageLocations() { Map<String, File> storageLocations

问题 My app ( Android API 15 ) makes a picture and stores it in the internal memory's folder. Now, I want to copy this file to another folder inside of the external storage, e.g. /sdcard/myapp . I tried the following approaches: Approach #1: private void copyFile(File src, File dst) throws IOException { File from = new File(src.getPath()); File to = new File(dst.getPath()); from.renameTo(to); } Approach #2: private void copyFile(File src, File dst) throws IOException { FileChannel inChannel = null

问题 I am trying to implement a File Chooser. I am using Android File Explore for file chooser in my app. When I run the app, it shows me Internal storage and returns me the file path, but it doesn't show External Storage at all. This is my AndroidManifest.xml file. <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.unicloud.mittal" > <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name=

问题 Background Android had a lot of changes as to how to handle the SD-card and storage in general: API 3 - you get all access, no permission needed API 4-15 - you need to use WRITE_EXTERNAL_STORAGE, and you get all access. API 16-18 - if you wish only to read, use READ_EXTERNAL_STORAGE API 19-20 - you can't read or write to secondary external storage (SD-card), unless your app is a system app, or you have root. API 21-22 - in order to access the SD-card, you need to ask the user for permission,

问题 I have a simple application that attempts to save some data to external storage on Android device (Nexus 4) to be later retrieved on PC (Windows or Mac). The writing succeeds but when i try to retrieve the file using Android File Transfer on Mac or by Explorer on Windows the MyApp directory just isn't there. If i use 'Root Explorer' app on the device itself i can see the directory and the file and all permissions look ok. The application code is along the following lines: File extStorageDir =

问题 /*Files will be clicked here*/ @Override protected void onListItemClick(ListView l,View v, final int position, long id){ filePosition=new File(path1.get(position)); System.out.println("File position:"+filePosition); if(filePosition.isDirectory()){ if(filePosition.canRead()) getDirectories(path1.get(position)); else { new AlertDialog.Builder(VideoSDcard.this) .setIcon(R.drawable.folder) .setTitle("["+filePosition.getName()+"]folder can't be read!") .setPositiveButton("Ok", new DialogInterface

问题 I'm goig to be mad with a strange issue. If i create a folder inside my code as directory_path = Environment.getExternalStorageDirectory() + "/" + context.getResources().getString(R.string.app_name); directory = new File(directory_path); if (!directory.exists()) { directory.mkdirs(); } a new folder is created inside /sdcard/ . If i try to print on logcat directory_path variable, the path is different: /storage/emulated/0/ and if i go to that path, i found another folder with the same name of

问题 The following code snippet is trying to store a Gesture object. private Gesture mGesture; private GestureLibrary store; store.addGesture("test", mGesture); store.save(); I'm wondering where is mGesture stored? Just followed by the above code, the author gives the following code: final String path = new File(Environment.getExternalStorageDirectory(), "gestures").getAbsolutePath(); Toast.makeText(this, getString(R.string.save_success, path), Toast.LENGTH_LONG).show(); So I guess the mGesture is