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[英]How to create directory in external storage in android which show external storage path as “storage/emulated/0”?
[英]Android 9 can't create directory inside Android external public path("storage/emulated/0/MyImages")
我想在 Android 外部公共路径( "storage/emulated/0/MyImages"
)中创建一个目录。
代码在 Android 9 上运行。授予在外部存储上写入的所有运行时权限。
试过这样的代码。
File dir = new File(Environment.getExternalStorageDirectory() + File.separator + "MyImages");
if (!dir.exists) {
dir.mkdirs();
}
dir
变量具有路径 - "/storage/emulated/0/MyImages"
。
dir.mkdirs()
总是返回false
。 LogCat 有一个简短的日志:
W/System.err: java.io.IOException: No such file or directory
W/System.err: at java.io.UnixFileSystem.createFileExclusively0(Native Method)
W/System.err: at java.io.UnixFileSystem.createFileExclusively(UnixFileSystem.java:281)
W/System.err: at java.io.File.createNewFile(File.java:1008)
首先,如果是的话检查权限然后调用你的函数来调用 showPhoneStatePermission
在清单中添加权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
private void showPhoneStatePermission() {
int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
showExplanation("Permission Needed", "Rationale", Manifest.permission.WRITE_EXTERNAL_STORAGE, REQUEST_PERMISSION_WRITE_EXTERNAL_STORAGE);
} else {
requestPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE, REQUEST_PERMISSION_WRITE_EXTERNAL_STORAGE);
}
} else {
Toast.makeText(MainActivity.this, "Permission (already) Granted!", Toast.LENGTH_SHORT).show();
}
}
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