Help installing OpenKeychain

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

@@ -316,6 +316,9 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
         iff.addAction(ACTION_SHOW_PRO);
         lbm.registerReceiver(receiver, iff);
 
+        if (!pgpService.isBound())
+            pgpService.bindToService();
+
         Intent intent = getIntent();
         String action = intent.getAction();
         Log.i(Helper.TAG, "View intent=" + intent + " action=" + action);
@@ -899,12 +902,24 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
 
     private void onDecrypt(Intent intent) {
         if (Helper.isPro(this)) {
+            if (pgpService.isBound()) {
                 Intent data = new Intent();
                 data.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
                 data.putExtra(OpenPgpApi.EXTRA_USER_IDS, new String[]{intent.getStringExtra("to")});
                 data.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
 
                 decrypt(data, intent.getLongExtra("id", -1));
+            } else {
+                Snackbar snackbar = Snackbar.make(view, R.string.title_no_openpgp, Snackbar.LENGTH_LONG);
+                if (Helper.getIntentOpenKeychain().resolveActivity(getPackageManager()) != null)
+                    snackbar.setAction(R.string.title_fix, new View.OnClickListener() {
+                        @Override
+                        public void onClick(View v) {
+                            startActivity(Helper.getIntentOpenKeychain());
+                        }
+                    });
+                snackbar.show();
+            }
         } else
             onShowPro(intent);
     }
@@ -927,9 +942,6 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
                 long id = args.getLong("id");
                 Intent data = args.getParcelable("data");
 
-                if (!pgpService.isBound())
-                    throw new IllegalArgumentException(getString(R.string.title_no_openpgp));
-
                 DB db = DB.getInstance(context);
 
                 // Find encrypted data

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

@@ -367,6 +367,14 @@ public class FragmentCompose extends FragmentEx {
         }
     }
 
+    @Override
+    public void onResume() {
+        super.onResume();
+
+        if (!pgpService.isBound())
+            pgpService.bindToService();
+    }
+
     @Override
     public void onPause() {
         if (autosave)
@@ -488,7 +496,8 @@ public class FragmentCompose extends FragmentEx {
     }
 
     private void onEncrypt() {
-        if (Helper.isPro(getContext()))
+        if (Helper.isPro(getContext())) {
+            if (pgpService.isBound())
                 try {
                     String to = etTo.getText().toString();
                     InternetAddress ato[] = (TextUtils.isEmpty(to) ? new InternetAddress[0] : InternetAddress.parse(to));
@@ -512,6 +521,17 @@ public class FragmentCompose extends FragmentEx {
                         Helper.unexpectedError(getContext(), ex);
                 }
             else {
+                Snackbar snackbar = Snackbar.make(view, R.string.title_no_openpgp, Snackbar.LENGTH_LONG);
+                if (Helper.getIntentOpenKeychain().resolveActivity(getContext().getPackageManager()) != null)
+                    snackbar.setAction(R.string.title_fix, new View.OnClickListener() {
+                        @Override
+                        public void onClick(View v) {
+                            startActivity(Helper.getIntentOpenKeychain());
+                        }
+                    });
+                snackbar.show();
+            }
+        } else {
             FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
             fragmentTransaction.replace(R.id.content_frame, new FragmentPro()).addToBackStack("pro");
             fragmentTransaction.commit();
@@ -530,9 +550,6 @@ public class FragmentCompose extends FragmentEx {
                 long id = args.getLong("id");
                 Intent data = args.getParcelable("data");
 
-                if (!pgpService.isBound())
-                    throw new IllegalArgumentException(getString(R.string.title_no_openpgp));
-
                 DB db = DB.getInstance(context);
 
                 // Get attachments

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

@@ -109,6 +109,12 @@ public class Helper {
         return intent;
     }
 
+    static Intent getIntentOpenKeychain() {
+        Intent intent = new Intent(Intent.ACTION_VIEW);
+        intent.setData(Uri.parse("https://f-droid.org/en/packages/org.sufficientlysecure.keychain/"));
+        return intent;
+    }
+
     static int resolveColor(Context context, int attr) {
         int[] attrs = new int[]{attr};
         TypedArray a = context.getTheme().obtainStyledAttributes(attrs);