Apps cannot request to install certificates anymore on Android 11

Why need everything to be so hard?

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

@@ -52,6 +52,7 @@ import android.os.Handler;
 import android.os.OperationCanceledException;
 import android.provider.ContactsContract;
 import android.provider.MediaStore;
+import android.provider.Settings;
 import android.security.KeyChain;
 import android.security.KeyChainException;
 import android.text.Editable;
@@ -1620,7 +1621,9 @@ public class FragmentCompose extends FragmentBase {
                             @Override
                             public void onNothingSelected() {
                                 Snackbar snackbar = Snackbar.make(view, R.string.title_no_key, Snackbar.LENGTH_LONG);
-                                final Intent intent = KeyChain.createInstallIntent();
+                                final Intent intent = (Build.VERSION.SDK_INT < Build.VERSION_CODES.R
+                                        ? KeyChain.createInstallIntent()
+                                        : new Intent(Settings.ACTION_SECURITY_SETTINGS));
                                 PackageManager pm = getContext().getPackageManager();
                                 if (intent.resolveActivity(pm) != null) // package whitelisted
                                     snackbar.setAction(R.string.title_fix, new View.OnClickListener() {

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

@@ -54,6 +54,7 @@ import android.print.PrintAttributes;
 import android.print.PrintDocumentAdapter;
 import android.print.PrintManager;
 import android.provider.ContactsContract;
+import android.provider.Settings;
 import android.security.KeyChain;
 import android.security.KeyChainException;
 import android.text.SpannableString;
@@ -5104,7 +5105,9 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                         @Override
                         public void onNothingSelected() {
                             Snackbar snackbar = Snackbar.make(view, R.string.title_no_key, Snackbar.LENGTH_LONG);
-                            final Intent intent = KeyChain.createInstallIntent();
+                            final Intent intent = (Build.VERSION.SDK_INT < Build.VERSION_CODES.R
+                                    ? KeyChain.createInstallIntent()
+                                    : new Intent(Settings.ACTION_SECURITY_SETTINGS));
                             PackageManager pm = getContext().getPackageManager();
                             if (intent.resolveActivity(pm) != null) // system whitelisted
                                 snackbar.setAction(R.string.title_fix, new View.OnClickListener() {

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

@@ -25,6 +25,7 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
+import android.os.Build;
 import android.os.Bundle;
 import android.provider.Settings;
 import android.security.KeyChain;
@@ -212,6 +213,7 @@ public class FragmentOptionsEncryption extends FragmentBase implements SharedPre
 
         final Intent importKey = KeyChain.createInstallIntent();
         btnImportKey.setEnabled(importKey.resolveActivity(pm) != null); // system whitelisted
+        btnImportKey.setVisibility(Build.VERSION.SDK_INT < Build.VERSION_CODES.R ? View.VISIBLE : View.GONE);
         btnImportKey.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {