问题描述
我正在尝试通过以下代码保存位图图像:
I`m trying to save Bitmap image by this code:
File sdcard = Environment.getExternalStorageDirectory();
String filename = "test";
File folder = new File(sdcard, "/Download");
Log.v("ImageStorage1", "EXiST?: " + folder.exists());
folder.mkdirs();
Log.v("ImageStorage2", "EXIST!: " + folder.exists());
Log.v("ImageStorage", "Folder: " + folder);
File file = new File(folder, filename + ".jpg");
try {
FileOutputStream out = new FileOutputStream(file.getAbsoluteFile());
result.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
我也在清单文件中使用
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
但是我要得到这个:
V/ImageStorage1: EXiST?: true
V/ImageStorage2: EXIST!: true
W/System.err: java.io.FileNotFoundException:
/storage/emulated/0/Download/test.jpg (Permission denied)
W/System.err: at java.io.FileOutputStream.open0(Native Method)
W/System.err: at java.io.FileOutputStream.open(FileOutputStream.java:287)
W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:223)
W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:171)
实际上,我的任务是存储到另一个文件夹,当我使用此文件夹时:
Actually, my task is to store to another folder and when I`m using this:
File folder = new File(sdcard, "/kpi/test/a");
我要得到
V/ImageStorage1: EXiST?: false
V/ImageStorage2: EXIST!: false
(No such file or directory)
即使:
folder.mkdirs();
我尝试了很多,冲浪了很多,但是还没有找到答案:(
I tried a lot and surfed a lot, but haven`t found an answer :(
推荐答案
运行时权限让用户在运行时允许或拒绝任何许可.请使用此lib Dexter 库.还要检查可用的示例此处
runtime permissions letting user to allow or deny any permission at runtime. use this lib Dexter library.also check an working exmple here
将库包含在您的build.gradle
dependencies{
implementation 'com.karumi:dexter:4.2.0'
}
此示例请求WRITE_EXTERNAL_STORAGE.
Dexter.withActivity(this)
.withPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)
.withListener(new PermissionListener() {
@Override
public void onPermissionGranted(PermissionGrantedResponse response) {
// permission is granted, open the camera
}
@Override
public void onPermissionDenied(PermissionDeniedResponse response) {
// check for permanent denial of permission
if (response.isPermanentlyDenied()) {
// navigate user to app settings
}
}
@Override
public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token) {
token.continuePermissionRequest();
}
}).check();
请求多个权限若要同时请求多个权限,可以使用withPermissions()
方法.下面的代码请求STORAGE
和LOCATION
permissions
.
Requesting Multiple PermissionsTo request multiple permissions at the same time, you can use withPermissions()
method. Below code requests STORAGE
and LOCATION
permissions
.
Dexter.withActivity(this)
.withPermissions(
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.ACCESS_FINE_LOCATION)
.withListener(new MultiplePermissionsListener() {
@Override
public void onPermissionsChecked(MultiplePermissionsReport report) {
// check if all permissions are granted
if (report.areAllPermissionsGranted()) {
// do you work now
}
// check for permanent denial of any permission
if (report.isAnyPermissionPermanentlyDenied()) {
// permission is denied permenantly, navigate user to app settings
}
}
@Override
public void onPermissionRationaleShouldBeShown(List<PermissionRequest> permissions, PermissionToken token) {
token.continuePermissionRequest();
}
})
.onSameThread()
.check();
这篇关于得到所有时间“拒绝权限".或“没有这样的文件或目录";通过尝试保存位图图像.我该怎么办?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!