improve "show QR" screen

src/main/java/org/thoughtcrime/securesms/qr/QrActivity.java

@@ -12,10 +12,10 @@
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.core.view.MenuCompat;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentStatePagerAdapter;
@@ -42,7 +42,7 @@
 import java.io.FileNotFoundException;
 import java.io.InputStream;
 
-public class QrActivity extends BaseActionBarActivity {
+public class QrActivity extends BaseActionBarActivity implements View.OnClickListener {
 
     private final static String TAG = QrActivity.class.getSimpleName();
     private final static int REQUEST_CODE_IMAGE = 46243;
@@ -64,7 +64,7 @@ protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
         setContentView(R.layout.activity_qr);
-        qrShowFragment = new QrShowFragment();
+        qrShowFragment = new QrShowFragment(this);
         tabLayout = ViewUtil.findById(this, R.id.tab_layout);
         viewPager = ViewUtil.findById(this, R.id.pager);
         ProfilePagerAdapter adapter = new ProfilePagerAdapter(this, getSupportFragmentManager());
@@ -118,7 +118,6 @@ public boolean onPrepareOptionsMenu(Menu menu) {
       menu.findItem(R.id.new_classic_contact).setVisible(!DcHelper.getContext(this).isChatmail());
       if(tabLayout.getSelectedTabPosition() == TAB_SCAN) {
         menu.findItem(R.id.withdraw).setVisible(false);
-        menu.findItem(R.id.copy).setVisible(false);
       }
       return super.onPrepareOptionsMenu(menu);
     }
@@ -141,12 +140,6 @@ public boolean onOptionsItemSelected(MenuItem item) {
             case R.id.new_classic_contact:
                 this.startActivity(new Intent(this, NewContactActivity.class));
                 break;
-            case R.id.share:
-                qrShowFragment.shareInviteURL();
-                break;
-            case R.id.copy:
-                qrShowFragment.copyQrData();
-                break;
             case R.id.withdraw:
                 qrShowFragment.withdrawQr();
                 break;
@@ -216,6 +209,11 @@ public void onActivityResult(int reqCode, int resultCode, final Intent data) {
         }
     }
 
+    @Override
+    public void onClick(View v) {
+        viewPager.setCurrentItem(TAB_SCAN);
+    }
+
     private class ProfilePagerAdapter extends FragmentStatePagerAdapter {
 
         private final QrActivity activity;

src/main/java/org/thoughtcrime/securesms/qr/QrShowActivity.java

@@ -85,12 +85,6 @@ public boolean onOptionsItemSelected(MenuItem item) {
             case android.R.id.home:
                 finish();
                 return true;
-            case R.id.share:
-                fragment.shareInviteURL();
-                break;
-            case R.id.copy:
-                fragment.copyQrData();
-                break;
             case R.id.withdraw:
                 fragment.withdrawQr();
                 break;

src/main/java/org/thoughtcrime/securesms/qr/QrShowFragment.java

@@ -9,6 +9,8 @@
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowManager;
+import android.widget.Button;
+import android.widget.TextView;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
@@ -46,6 +48,17 @@ public class QrShowFragment extends Fragment implements DcEventCenter.DcEventDel
 
     private DcContext dcContext;
 
+    private View.OnClickListener scanClicklistener;
+
+    public QrShowFragment() {
+        this(null);
+    }
+
+    public QrShowFragment(View.OnClickListener scanClicklistener) {
+        super();
+        this.scanClicklistener = scanClicklistener;
+    }
+
     @Override
     public void onCreate(Bundle bundle) {
         super.onCreate(bundle);
@@ -86,7 +99,14 @@ public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
             e.printStackTrace();
         }
 
-        view.findViewById(R.id.share_link_button).setOnClickListener((v) -> shareInviteURL());
+        view.findViewById(R.id.share_link_button).setOnClickListener((v) -> showInviteLinkDialog());
+        Button scanBtn = view.findViewById(R.id.scan_qr_button);
+        if (scanClicklistener != null) {
+            scanBtn.setVisibility(View.VISIBLE);
+            scanBtn.setOnClickListener(scanClicklistener);
+        } else {
+            scanBtn.setVisibility(View.GONE);
+        }
 
         return view;
     }
@@ -129,6 +149,19 @@ public void withdrawQr() {
         builder.create().show();
     }
 
+    public void showInviteLinkDialog() {
+      View view = View.inflate(getActivity(), R.layout.dialog_share_invite_link, null);
+      String inviteURL = Util.QrDataToInviteURL(dcContext.getSecurejoinQr(chatId));
+      ((TextView)view.findViewById(R.id.invite_link)).setText(inviteURL);
+      new AlertDialog.Builder(getActivity())
+        .setView(view)
+        .setNegativeButton(R.string.cancel, null)
+        .setNeutralButton(R.string.menu_copy_to_clipboard, (d, b) -> copyQrData())
+        .setPositiveButton(R.string.menu_share, (d, b) -> shareInviteURL())
+        .create()
+        .show();
+    }
+
     @Override
     public void onResume() {
         super.onResume();

src/main/res/drawable/ic_link_24.xml

@@ -0,0 +1,8 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#FFFFFF" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+    <group
+        android:translateX="29"
+        android:translateY="12"
+        android:rotation="135">
+      <path android:fillColor="@android:color/white" android:pathData="M3.9,12c0,-1.71 1.39,-3.1 3.1,-3.1h4L11,7L7,7c-2.76,0 -5,2.24 -5,5s2.24,5 5,5h4v-1.9L7,15.1c-1.71,0 -3.1,-1.39 -3.1,-3.1zM8,13h8v-2L8,11v2zM17,7h-4v1.9h4c1.71,0 3.1,1.39 3.1,3.1s-1.39,3.1 -3.1,3.1h-4L13,17h4c2.76,0 5,-2.24 5,-5s-2.24,-5 -5,-5z"/>
+    </group>
+</vector>

src/main/res/drawable/ic_qr_code_scanner_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#FFFFFF" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+
+    <path android:fillColor="@android:color/white" android:pathData="M9.5,6.5v3h-3v-3H9.5M11,5H5v6h6V5L11,5zM9.5,14.5v3h-3v-3H9.5M11,13H5v6h6V13L11,13zM17.5,6.5v3h-3v-3H17.5M19,5h-6v6h6V5L19,5zM13,13h1.5v1.5H13V13zM14.5,14.5H16V16h-1.5V14.5zM16,13h1.5v1.5H16V13zM13,16h1.5v1.5H13V16zM14.5,17.5H16V19h-1.5V17.5zM16,16h1.5v1.5H16V16zM17.5,14.5H19V16h-1.5V14.5zM17.5,17.5H19V19h-1.5V17.5zM22,7h-2V4h-3V2h5V7zM22,22v-5h-2v3h-3v2H22zM2,22h5v-2H4v-3H2V22zM2,2v5h2V4h3V2H2z"/>
+
+</vector>

src/main/res/layout/dialog_share_invite_link.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+  <LinearLayout
+      android:layout_width="match_parent"
+      android:layout_height="wrap_content"
+      android:paddingLeft="20dp"
+      android:paddingRight="20dp"
+      android:paddingTop="16dp"
+      android:paddingBottom="10dp"
+      android:orientation="vertical">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="16sp"
+        android:paddingBottom="16dp"
+        android:text="@string/share_invite_link_explain" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:gravity="center_vertical"
+        android:padding="16dp"
+        android:background="@drawable/delete_account_item_background">
+
+      <TextView
+          android:id="@+id/invite_link"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content"
+          android:ellipsize="marquee"
+          android:fontFamily="sans-serif"
+          android:textSize="16sp"
+          tools:text="https://i.delta.chat/#9AF055DB87EC48A1C009B6CA55E3712A6F7D346F&amp;a=botsindex%40nine.testrun.org&amp;n=Public%20Bots&amp;i=QpBSronexvP&amp;s=nAfQ0q_JomN"
+          />
+
+    </LinearLayout>
+
+  </LinearLayout>
+
+</ScrollView>
+

src/main/res/layout/qr_show_fragment.xml

@@ -6,36 +6,68 @@
 	android:layout_width="match_parent"
 	android:layout_height="match_parent">
 
+  <androidx.constraintlayout.widget.Guideline
+      android:id="@+id/guideline"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:orientation="horizontal"
+      app:layout_constraintGuide_percent="0.6"/>
+
     <org.thoughtcrime.securesms.components.ScaleStableImageView
         android:id="@+id/background"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:scaleType="centerCrop"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
+        tools:src="@drawable/background_hd"
         tools:ignore="ContentDescription" />
 
 	<com.caverock.androidsvg.SVGImageView
 		android:id="@+id/qrImage"
 		android:layout_width="match_parent"
         android:layout_height="0dp"
 		android:layout_gravity="center"
+        android:padding="16dp"
         android:contentDescription="@string/qrscan_title"
-        app:layout_constraintBottom_toTopOf="@id/share_link_button"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="@id/guideline"
+        />
 
-    <Button
-        android:id="@+id/share_link_button"
-        style="@style/ButtonPrimary"
-        android:layout_width="wrap_content"
+    <LinearLayout
+        android:id="@+id/buttons_group"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginBottom="16dp"
-        android:paddingLeft="24dp"
-        android:paddingRight="24dp"
-        android:text="@string/share_invite_link"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent" />
+        android:gravity="center"
+        app:layout_constraintTop_toBottomOf="@id/qrImage"
+        >
+
+      <Button
+          android:id="@+id/share_link_button"
+          style="@style/ButtonPrimary"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content"
+          android:paddingLeft="16dp"
+          android:paddingRight="16dp"
+          android:text="@string/link"
+          android:drawableStart="@drawable/ic_link_24"
+          />
+
+      <Button
+          android:id="@+id/scan_qr_button"
+          style="@style/ButtonPrimary"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content"
+          android:layout_marginStart="16dp"
+          android:paddingLeft="16dp"
+          android:paddingRight="16dp"
+          android:text="@string/scan"
+          android:drawableStart="@drawable/ic_qr_code_scanner_24"
+          android:drawablePadding="4dp"
+          />
+
+    </LinearLayout>
 
 </androidx.constraintlayout.widget.ConstraintLayout>

src/main/res/menu/qr_show.xml

@@ -2,19 +2,10 @@
 
 <menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto">
 
-    <item android:title="@string/menu_share"
-          android:id="@+id/share"
-          android:icon="@drawable/ic_share_white_24dp"
-          app:showAsAction="ifRoom"/>
-
     <item android:title="@string/menu_new_classic_contact"
           android:id="@+id/new_classic_contact"
           app:showAsAction="never"/>
 
-    <item android:title="@string/menu_copy_to_clipboard"
-          android:id="@+id/copy"
-          app:showAsAction="never"/>
-
     <item android:title="@string/paste_from_clipboard"
           android:id="@+id/paste"
           app:showAsAction="never"/>

src/main/res/values/strings.xml

@@ -7,6 +7,8 @@
    <!-- deprecated, the word "or" to separate blocks in the user interface that are mutually exclusive -->
     <string name="or_separator">or</string>
     <string name="clear_search">Clear Search</string>
+    <string name="link">Link</string>
+    <string name="scan">Scan</string>
     <string name="yes">Yes</string>
     <string name="no">No</string>
     <string name="select">Select</string>
@@ -230,6 +232,7 @@
     <string name="menu_message_details">Message Info</string>
     <string name="menu_copy_to_clipboard">Copy to Clipboard</string>
     <string name="share_invite_link">Share Invite Link</string>
+    <string name="share_invite_link_explain">Anyone with this link can view your profile and start a chat with you. Only share it with people you trust.</string>
     <string name="invite_friends">Invite Friends</string>
     <!-- %1$s is replaced by the user's invitation link ("https://i.delta.chat/...") -->
     <string name="invite_friends_text">Contact me on Delta Chat:\n%1$s</string>