Java getExternalStorageDirectory() 到 getExternalFilesDir()
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/18169429/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
getExternalStorageDirectory() to getExternalFilesDir()
提问by Nino Belgica
So, basically I have this code (all credits to mburhman's File Explorer - https://github.com/mburman/Android-File-Explore):
所以，基本上我有这个代码（所有功劳都归功于 mburhman 的文件资源管理器 - https://github.com/mburman/Android-File-Explore）：
private File path = new File(Environment.getExternalStorageDirectory() + "");
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.start);
loadFileList();
showDialog(DIALOG_LOAD_FILE);
Log.d(TAG, path.getAbsolutePath());
readDir = (Button) findViewById(R.id.btnReadDirectory);
readDir.setOnClickListener(this);
}
private void loadFileList() {
try {
path.mkdirs();
} catch (SecurityException e) {
Log.e(TAG, "unable to write on the sd card ");
}
if (path.exists()) {
FilenameFilter filter = new FilenameFilter() {
@Override
public boolean accept(File dir, String filename) {
// TODO Auto-generated method stub
File sel = new File(dir, filename);
// Filters based on whether the file is hidden or not
return (sel.isFile() || sel.isDirectory())
&& !sel.isHidden();
}
};
String[] fList = path.list(filter);
fileList = new Item[fList.length];
for (int i = 0; i < fList.length; i++) {
fileList[i] = new Item(fList[i], R.drawable.file_icon);
File sel = new File(path, fList[i]);
if (sel.isDirectory()) {
fileList[i].icon = R.drawable.directory_icon;
Log.d("DIRECTORY", fileList[i].file);
} else {
Log.d("FILE", fileList[i].file);
}
}
if (!firstLvl) {
Item temp[] = new Item[fileList.length + 1];
for (int i = 0; i < fileList.length; i++) {
temp[i + 1] = fileList[i];
}
temp[0] = new Item("Up", R.drawable.directory_up);
fileList = temp;
}
} else {
Log.e(TAG, "path does not exist");
UIHelper.displayText(this, R.id.tvPath, "Path does not exist");
}
adapter = new ArrayAdapter<Item>(this,
android.R.layout.select_dialog_item, android.R.id.text1,
fileList) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
TextView textView = (TextView) view
.findViewById(android.R.id.text1);
textView.setCompoundDrawablesWithIntrinsicBounds(
fileList[position].icon, 0, 0, 0);
int dp5 = (int) (5 * getResources().getDisplayMetrics().density + 0.5f);
textView.setCompoundDrawablePadding(dp5);
return view;
}
};
}
Sorry for it being long. I just want to ask why is it not possible by changing File path to:
对不起，时间长了。我只是想问为什么不能通过将文件路径更改为：
File path = getExternalFilesDir(null);
or how do you make it happen so I can store my files to my reserved external SD Card.
或者你如何做到这一点，以便我可以将我的文件存储到我保留的外部 SD 卡中。
采纳答案by Boris Strandjev
It basically is possible, but the place of the external storage for your application is different on different devices (basically because some devices have the external as part of their integrated storage). I have taken the code below from somewhere on SO and it works for me:
这基本上是可能的，但是您的应用程序的外部存储位置在不同设备上是不同的（主要是因为某些设备将外部存储作为其集成存储的一部分）。我从 SO 上的某个地方获取了下面的代码，它对我有用：
private File getAbsoluteFile(String relativePath, Context context) {
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
return new File(context.getExternalFilesDir(null), relativePath);
} else {
return new File(context.getFilesDir(), relativePath);
}
}
