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java - getExternalStorageDirectory() 到 getExternalFilesDir()

转载 作者:塔克拉玛干 更新时间:2023-11-02 21:00:22 25 4
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所以,基本上我有这段代码(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;
}
};
}

抱歉,时间太长了。我只想问为什么不能通过将文件路径更改为:

File path = getExternalFilesDir(null);

或者您如何实现它,以便我可以将我的文件存储到我预留的外部 SD 卡中。

编辑:

实际上,自从我关注了这个 blog 之后,我发现我指向的是 assets 文件夹。发布。

这是指向 Assets 文件夹的方法 https://gist.github.com/huxaiphaer/268b94a0e7959822fa679a7523701187

最佳答案

这基本上是可能的,但您的应用程序的外部存储位置在不同的设备上是不同的(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 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);
}
}

关于java - getExternalStorageDirectory() 到 getExternalFilesDir(),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18169429/

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