英文:
i can't read the user storage,
问题
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final String TAG = "MainActivity";
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = findViewById(R.id.button);
button.setOnClickListener(this);
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.READ_EXTERNAL_STORAGE }, 123);
} else {
Log.d(TAG, "onCreate: Permission Granted");
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case 123:
if (grantResults != null && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "Permission Granted", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Permission Denied", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button:
String path = "/";
File dir = new File(path);
if (dir.isDirectory()) {
Log.d(TAG, "dir: Yes, I am!");
}
if (dir.canRead()) {
Log.d(TAG, "dir: Read me!");
} else {
Log.d(TAG, "dir: you can't read me!");
}
if (dir.canWrite()) {
Log.d(TAG, "dir: use me!");
} else {
Log.d(TAG, "dir: You Can't write me");
}
}
}
}
log cat: D/MainActivity: onCreate: Permission Granted 2020-05-04
D/MainActivity: dir: Yes, I am! 2020-05-04 07:21:09.680
D/MainActivity: dir: you can't read me! 2020-05-04 07:21:09.680
D/MainActivity: dir: You Can't write me
英文:
I' am trying to list all the folders and files from user storage, I've declared the READ_EXTERNAL_STORAGE permission in android.manifest file but I don't what's wrong, I can't read the user storage
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final String TAG = "MainActivity";
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = findViewById(R.id.button);
button.setOnClickListener(this);
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[] {
Manifest.permission.READ_EXTERNAL_STORAGE
}, 123);
} else {
Log.d(TAG, "onCreate: Permission Granted");
}
}
@Override
public void onRequestPermissionsResult(int requestCode,
@NonNull String[] permissions,
@NonNull int[] grantResults) {
switch (requestCode) {
case 123:
if (grantResults != null && grantResults[0] ==
PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "Permission Granted", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "Permission Denied",
Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button:
String path = "/";
File dir = new File(path);
if (dir.isDirectory()) {
Log.d(TAG, "dir: Yes, I am!");
}
if (dir.canRead()) {
Log.d(TAG, "dir: Read me!");
} else {
Log.d(TAG, "dir: you can't read me!");
}
if (dir.canWrite()) {
Log.d(TAG, "dir: use me!");
} else {
Log.d(TAG, "dir: You Can't write me");
}
}
}
}
> log cat: D/MainActivity: onCreate: Permission Granted 2020-05-04
> 07:21:09.680 27634-27634/co.ak.externalstorage D/MainActivity: dir:
> Yes, I am! 2020-05-04 07:21:09.680 27634-27634/co.ak.externalstorage
> D/MainActivity: dir: you can't read me! 2020-05-04 07:21:09.680
> 27634-27634/co.ak.externalstorage D/MainActivity: dir: You Can't write
> me
答案1
得分: 0
"/"根目录自Android 7起不可读。
为什么要称呼那个用户存储？
英文:
The "/" root directory is not readable since Android 7.
Why are you calling that user storage?
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