我创建了一个创建文本文件并写入设备本地存储的 android 应用程序。它在所有其他设备上工作正常,我可以在内部存储中看到创建的文件。但是在 LG-D850(更新到 android 版本 7.1)中,应用程序运行良好,但无法在内部存储中创建/显示文件。我已经检查了 storage/emulated/0 但它不存在。
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37 次
1 回答
0
解决方案
尝试在您的创建中使用此调用此方法并接受许可,您应该能够看到您放置它的文本文件。
public boolean isStoragePermissionGranted() {
if (Build.VERSION.SDK_INT >= 23) {
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
== PackageManager.PERMISSION_GRANTED) {
Log.v(TAG,"Permission is granted");
return true;
} else {
Log.v(TAG,"Permission is revoked");
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
return false;
}
}
else { //permission is automatically granted on sdk<23 upon installation
Log.v(TAG,"Permission is granted");
return true;
}
}
检查用户单击的内容并在他们选择后决定如何处理应用程序的方法。
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case 1: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(MainActivity.this, "Permission denied to read your External storage", Toast.LENGTH_SHORT).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
于 2017-08-16T15:59:47.757 回答