Use content resolver openInputStream

app/src/main/java/eu/faircode/email/ActivityDSN.java

@@ -23,7 +23,6 @@ import android.Manifest;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
-import android.content.res.AssetFileDescriptor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.text.Spanned;
@@ -101,8 +100,7 @@ public class ActivityDSN extends ActivityBase {
                 Result result = new Result();
 
                 ContentResolver resolver = context.getContentResolver();
-                AssetFileDescriptor descriptor = resolver.openTypedAssetFileDescriptor(uri, "*/*", null);
-                try (InputStream is = descriptor.createInputStream()) {
+                try (InputStream is = resolver.openInputStream(uri)) {
                     ByteArrayOutputStream bos = new ByteArrayOutputStream();
                     byte[] buffer = new byte[Helper.BUFFER_SIZE];
                     int length;

app/src/main/java/eu/faircode/email/ActivityEML.java

@@ -24,7 +24,6 @@ import android.content.ContentResolver;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.content.res.AssetFileDescriptor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.text.Spanned;
@@ -158,8 +157,7 @@ public class ActivityEML extends ActivityBase {
                 Result result = new Result();
 
                 ContentResolver resolver = context.getContentResolver();
-                AssetFileDescriptor descriptor = resolver.openTypedAssetFileDescriptor(uri, "*/*", null);
-                try (InputStream is = descriptor.createInputStream()) {
+                try (InputStream is = resolver.openInputStream(uri)) {
 
                     Properties props = MessageHelper.getSessionProperties();
                     Session isession = Session.getInstance(props, null);
@@ -406,8 +404,7 @@ public class ActivityEML extends ActivityBase {
                                             throw new IllegalArgumentException(context.getString(R.string.title_no_folder));
 
                                         ContentResolver resolver = context.getContentResolver();
-                                        AssetFileDescriptor descriptor = resolver.openTypedAssetFileDescriptor(uri, "*/*", null);
-                                        try (InputStream is = descriptor.createInputStream()) {
+                                        try (InputStream is = resolver.openInputStream(uri)) {
 
                                             Properties props = MessageHelper.getSessionProperties();
                                             Session isession = Session.getInstance(props, null);

app/src/main/java/eu/faircode/email/ActivitySetup.java

@@ -32,7 +32,6 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.SharedPreferences;
-import android.content.res.AssetFileDescriptor;
 import android.content.res.Configuration;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
@@ -704,8 +703,7 @@ public class ActivitySetup extends ActivityBase implements FragmentManager.OnBac
                 StringBuilder data = new StringBuilder();
                 Log.i("Reading URI=" + uri);
                 ContentResolver resolver = context.getContentResolver();
-                AssetFileDescriptor descriptor = resolver.openTypedAssetFileDescriptor(uri, "*/*", null);
-                try (InputStream raw = new BufferedInputStream(descriptor.createInputStream())) {
+                try (InputStream raw = new BufferedInputStream(resolver.openInputStream(uri))) {
 
                     InputStream in;
                     if (TextUtils.isEmpty(password))

app/src/main/java/eu/faircode/email/FragmentRules.java

@@ -23,7 +23,6 @@ import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.AssetFileDescriptor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.text.TextUtils;
@@ -386,8 +385,7 @@ public class FragmentRules extends FragmentBase {
 
                 Log.i("Reading URI=" + uri);
                 ContentResolver resolver = context.getContentResolver();
-                AssetFileDescriptor descriptor = resolver.openTypedAssetFileDescriptor(uri, "*/*", null);
-                try (InputStream is = descriptor.createInputStream()) {
+                try (InputStream is = resolver.openInputStream(uri)) {
                     BufferedReader reader = new BufferedReader(new InputStreamReader(is));
                     String line;
                     while ((line = reader.readLine()) != null)