[英]How to reference a File in raw folder in Android
I just want to create a File object like this 我只想创建一个像这样的File对象
File myImageFile = new File ("image1") ;
but it is giving me exception of FileNotFoundException 但它给了我FileNotFoundException异常
How can i reference a file inside my raw Folder 我如何引用原始文件夹中的文件
EDIT: Actually i wanted to do something like this 编辑:其实我想做这样的事情
MultipartEntity multipartEntity= new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE); multipartEntity.addPart("uploaded", new FileBody(new File("myimage")));
Generally you access the files through getResources().openRawResource(R.id._your_id). 通常,您通过getResources()。openRawResource(R.id._your_id)访问文件。 If you absolutely need a File reference to it, one option is to copy it over to internal storage: 如果您绝对需要文件引用,可以选择将其复制到内部存储:
File file = new File(this.getFilesDir() + File.separator + "DefaultProperties.xml");
try {
InputStream inputStream = resources.openRawResource(R.id._your_id);
FileOutputStream fileOutputStream = new FileOutputStream(file);
byte buf[]=new byte[1024];
int len;
while((len=inputStream.read(buf))>0) {
fileOutputStream.write(buf,0,len);
}
fileOutputStream.close();
inputStream.close();
} catch (IOException e1) {}
Now you have a File
that you can access anywhere you need it. 现在您有了一个可以在任何需要的地方访问的File
。
here are 2 functions. 这里有2个功能。 one to read from RAW and one from the Assets 一个从RAW读取,一个从Assets读取
/**
* Method to read in a text file placed in the res/raw directory of the
* application. The method reads in all lines of the file sequentially.
*/
public static void readRaw(Context ctx,int res_id) {
InputStream is = ctx.getResources().openRawResource(res_id);
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr, 8192); // 2nd arg is buffer
// size
// More efficient (less readable) implementation of above is the
// composite expression
/*
* BufferedReader br = new BufferedReader(new InputStreamReader(
* this.getResources().openRawResource(R.raw.textfile)), 8192);
*/
try {
String test;
while (true) {
test = br.readLine();
// readLine() returns null if no more lines in the file
if (test == null)
break;
}
isr.close();
is.close();
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
and from Assets folder 从Assets文件夹
/**
* Read a file from assets
*
* @return the string from assets
*/
public static String getQuestions(Context ctx,String file_name) {
AssetManager assetManager = ctx.getAssets();
ByteArrayOutputStream outputStream = null;
InputStream inputStream = null;
try {
inputStream = assetManager.open(file_name);
outputStream = new ByteArrayOutputStream();
byte buf[] = new byte[1024];
int len;
try {
while ((len = inputStream.read(buf)) != -1) {
outputStream.write(buf, 0, len);
}
outputStream.close();
inputStream.close();
} catch (IOException e) {
}
} catch (IOException e) {
}
return outputStream.toString();
}
You can open it as InputStream, I don't know if possible as a file: 您可以将其作为InputStream打开,我不知道是否可以作为文件:
int rid = resources.getIdentifier(packageName + ":raw/" + fileName, null, null);
//get the file as a stream
InputStrea is = resources.openRawResource(rid);
You can use InputStreamBody instead of FileBody so you can use it like this: 您可以使用InputStreamBody而不是FileBody,因此您可以像这样使用它:
InputStream inputStream = resources.openRawResource(R.raw.yourresource);
MultipartEntity multipartEntity= new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
multipartEntity.addPart("uploaded", new InputStreamBody(inputStream));
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