Added PGP key import button

app/build.gradle

@@ -163,6 +163,7 @@ android {
             buildConfigField "String", "GPA_URI", localProperties.getProperty("gpa.uri", "\"\"")
             buildConfigField "String", "INFO_URI", localProperties.getProperty("info.uri", "\"\"")
             buildConfigField "String", "DEV_DOMAIN", localProperties.getProperty("dev.domain", "\"\"")
+            buildConfigField "String", "FDROID", "\"https://f-droid.org/packages/%s/\""
         }
         fdroid {
             dimension "all"
@@ -179,6 +180,7 @@ android {
             buildConfigField "String", "GPA_URI", "\"\""
             buildConfigField "String", "INFO_URI", "\"\""
             buildConfigField "String", "DEV_DOMAIN", "\"\""
+            buildConfigField "String", "FDROID", "\"https://f-droid.org/packages/%s/\""
         }
         play {
             dimension "all"
@@ -196,6 +198,7 @@ android {
             buildConfigField "String", "GPA_URI", "\"\""
             buildConfigField "String", "INFO_URI", "\"\""
             buildConfigField "String", "DEV_DOMAIN", "\"\""
+            buildConfigField "String", "FDROID", "\"\""
         }
         amazon {
             dimension "all"
@@ -213,6 +216,7 @@ android {
             buildConfigField "String", "GPA_URI", "\"\""
             buildConfigField "String", "INFO_URI", "\"\""
             buildConfigField "String", "DEV_DOMAIN", "\"\""
+            buildConfigField "String", "FDROID", "\"\""
         }
     }
 

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

@@ -94,6 +94,7 @@ public class FragmentOptionsEncryption extends FragmentBase
     private SwitchCompat swAutocrypt;
     private SwitchCompat swAutocryptMutual;
     private SwitchCompat swEncryptSubject;
+    private Button btnImportPgp;
 
     private Spinner spSignAlgoSmime;
     private Spinner spEncryptAlgoSmime;
@@ -142,6 +143,7 @@ public class FragmentOptionsEncryption extends FragmentBase
         swAutocrypt = view.findViewById(R.id.swAutocrypt);
         swAutocryptMutual = view.findViewById(R.id.swAutocryptMutual);
         swEncryptSubject = view.findViewById(R.id.swEncryptSubject);
+        btnImportPgp = view.findViewById(R.id.btnImportPgp);
 
         spSignAlgoSmime = view.findViewById(R.id.spSignAlgoSmime);
         spEncryptAlgoSmime = view.findViewById(R.id.spEncryptAlgoSmime);
@@ -287,6 +289,24 @@ public class FragmentOptionsEncryption extends FragmentBase
             }
         });
 
+        btnImportPgp.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                String provider = prefs.getString("openpgp_provider", Helper.PGP_OPENKEYCHAIN_PACKAGE);
+
+                PackageManager pm = v.getContext().getPackageManager();
+                Intent intent = pm.getLaunchIntentForPackage(provider);
+                if (intent == null)
+                    if (TextUtils.isEmpty(BuildConfig.FDROID))
+                        intent = new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + provider));
+                    else
+                        intent = new Intent(Intent.ACTION_VIEW, Uri.parse(String.format(BuildConfig.FDROID, provider)));
+                else
+                    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                v.getContext().startActivity(intent);
+            }
+        });
+
         // S/MIME
 
         spSignAlgoSmime.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@@ -585,7 +605,7 @@ public class FragmentOptionsEncryption extends FragmentBase
         swAutoDecrypt.setChecked(prefs.getBoolean("auto_decrypt", false));
         swAutoUndoDecrypt.setChecked(prefs.getBoolean("auto_undecrypt", false));
 
-        String provider = prefs.getString("openpgp_provider", "org.sufficientlysecure.keychain");
+        String provider = prefs.getString("openpgp_provider", Helper.PGP_OPENKEYCHAIN_PACKAGE);
         spOpenPgp.setTag(provider);
         for (int pos = 0; pos < openPgpProvider.size(); pos++)
             if (provider.equals(openPgpProvider.get(pos))) {

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

@@ -175,6 +175,7 @@ public class Helper {
     static final int AUTOLOCK_GRACE = 7; // seconds
     static final long PIN_FAILURE_DELAY = 3; // seconds
 
+    static final String PGP_OPENKEYCHAIN_PACKAGE = "org.sufficientlysecure.keychain";
     static final String PGP_BEGIN_MESSAGE = "-----BEGIN PGP MESSAGE-----";
     static final String PGP_END_MESSAGE = "-----END PGP MESSAGE-----";
 
@@ -535,7 +536,7 @@ public class Helper {
 
     static String getOpenKeychainPackage(Context context) {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
-        return prefs.getString("openpgp_provider", "org.sufficientlysecure.keychain");
+        return prefs.getString("openpgp_provider", Helper.PGP_OPENKEYCHAIN_PACKAGE);
     }
 
     static boolean isOpenKeychainInstalled(Context context) {

app/src/main/res/layout/fragment_options_encryption.xml

@@ -243,6 +243,18 @@
                     app:layout_constraintStart_toStartOf="parent"
                     app:layout_constraintTop_toBottomOf="@id/swAutocryptMutual"
                     app:switchPadding="12dp" />
+
+                <Button
+                    android:id="@+id/btnImportPgp"
+                    style="?android:attr/buttonStyleSmall"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:drawableEnd="@drawable/twotone_add_24"
+                    android:drawablePadding="6dp"
+                    android:text="@string/title_advanced_import_pgp"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/swEncryptSubject" />
             </eu.faircode.email.ConstraintLayoutEx>
         </androidx.cardview.widget.CardView>
 

app/src/main/res/values/strings.xml

@@ -670,10 +670,13 @@
     <string name="title_advanced_encrypt_default">Encrypt by default</string>
     <string name="title_advanced_auto_decrypt">Automatically decrypt messages</string>
     <string name="title_advanced_auto_undo_decrypt">Undo decryption on closing conversation</string>
+
     <string name="title_advanced_openpgp">OpenPGP provider</string>
     <string name="title_advanced_autocrypt">Use Autocrypt</string>
     <string name="title_advanced_autocrypt_mutual">Autocrypt mutual mode</string>
     <string name="title_advanced_encrypt_subject">Encrypt subject</string>
+    <string name="title_advanced_import_pgp">Import key</string>
+
     <string name="title_advanced_sign_algo">Signature algorithm</string>
     <string name="title_advanced_encrypt_algo">Encryption algorithm</string>
     <string name="title_advanced_remark_algo">
@@ -689,6 +692,7 @@
         This will open to the Android security settings.
         Keys and certificates can generally be found under Advanced - Encryption and credentials.
     </string>
+
     <string name="title_advanced_aes_key_size" translatable="false">Max AES key size: %1$s</string>
 
     <string name="title_advanced_power_menu">Add actions to the Android power menu</string>