我的res/raw
文件夹中有一些音频文件。出于某些原因,我想将这些文件复制到我的SDCard当我的应用程序启动时。
我怎么能这样做?有人指导我吗?
答案 0 :(得分:43)
从资源中读取,写入SD卡上的文件:
InputStream in = getResources().openRawResource(R.raw.myresource);
FileOutputStream out = new FileOutputStream(somePathOnSdCard);
byte[] buff = new byte[1024];
int read = 0;
try {
while ((read = in.read(buff)) > 0) {
out.write(buff, 0, read);
}
} finally {
in.close();
out.close();
}
答案 1 :(得分:2)
这是我用来完成这项工作的方法,此方法接收资源ID和存储所需的名称,例如:
copyFiletoExternalStorage(R.raw.mysound, "jorgesys_sound.mp3");
方法:
private void copyFiletoExternalStorage(int resourceId, String resourceName){
String pathSDCard = Environment.getExternalStorageDirectory() + "/Android/data/" + resourceName;
try{
InputStream in = getResources().openRawResource(resourceId);
FileOutputStream out = null;
out = new FileOutputStream(pathSDCard);
byte[] buff = new byte[1024];
int read = 0;
try {
while ((read = in.read(buff)) > 0) {
out.write(buff, 0, read);
}
} finally {
in.close();
out.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
答案 2 :(得分:1)
环境。 getExternalStorageDirectory() API级别29中已弃用,将不允许创建 给定路径上的目录/文件。
以下代码可用于创建目录并从/ res / raw目录下载文件。
如果您的设备具有 Android 10(API级别29)或更高版本,它将 在以下位置下载文件
文件管理器->存储-> Android->数据-> com.yourapp.packagename->文件-> FOLDER_NAME -> file_name.png
private void downloadFileFromRawFolder(){
try {
InputStream in = getResources().openRawResource(
getResources().getIdentifier("file_name",
"raw", getPackageName())); // use only file name here, don't use extension
File fileWithinMyDir = new File(checkFolder(), "file_name.png"); //Getting a file within the dir.
Log.e("FILEPATH ", "fileWithinMyDir " + fileWithinMyDir);
FileOutputStream out = new FileOutputStream(fileWithinMyDir);
byte[] buff = new byte[1024 * 1024 * 2]; //2MB file
int read = 0;
try {
while ((read = in.read(buff)) > 0) {
out.write(buff, 0, read);
}
} finally {
in.close();
out.close();
}
Log.d(TAG, "Download Done ");
} catch (IOException e) {
Log.e(TAG, "Download Failed " + e.getMessage());
e.printStackTrace();
}
}
/ *创建目录* /
private File checkFolder() {
String path;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
path = getExternalFilesDir(null).getAbsolutePath() + "FOLDER_NAME";
} else {
path = Environment.getExternalStorageDirectory() + "FOLDER_NAME";
}
File dir = new File(path);
boolean isDirectoryCreated = dir.exists();
if (!isDirectoryCreated) {
isDirectoryCreated = dir.mkdir();
Log.d("Folder", "Created = " + isDirectoryCreated);
}
Log.d("Folder", "Created ? " + isDirectoryCreated);
return dir;
}
}