将位图保存到SD卡时出现FileNotFoundException

Question

I tried to save "viewBitmap" into SD card.

Here is my code:

try{
String mPath = Environment.getExternalStorageDirectory().toString();
imageFile = new File(mPath, "/snapshot.png");
FileOutputStream outputStream = new FileOutputStream(imageFile);
viewBitmap.compress(Bitmap.CompressFormat.JPEG,100,outputStream);
outputStream.flush();
outputStream.close();
Toast.makeText(Share.this, "Collage was saved.",Toast.LENGTH_SHORT).show();
}catch(Throwable e) {
 e.printStackTrace();
}

At the line "FileOutputStream outputStream = new FileOutputStream(imageFile);", an exception was thrown:

Answer 1

In your AndroidManifest.XML file did you add permission

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

If the device is running Android 6.0 (API level 23) or higher, and the app's targetSdkVersion is 23 or higher, refer to the documentation to request the permission at run time.