Register app as a way to share text

Author: Sam1301

app/src/main/AndroidManifest.xml

@@ -50,14 +50,16 @@
             android:launchMode="singleTask">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.SEND" />
-
                 <category android:name="android.intent.category.DEFAULT" />
-
+                <data android:mimeType="text/plain" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
                 <data android:mimeType="image/*" />
             </intent-filter>
         </activity>

app/src/main/java/com/zulip/android/activities/ZulipActivity.java

@@ -539,6 +539,9 @@ public Cursor runQuery(CharSequence charSequence) {
             if (type.startsWith("image/")) {
                 // Handle single image being sent
                 handleSentImage(intent);
+            } else if ("text/plain".equals(type)) {
+                // Handle text being sent
+                handleSentText(intent);
             }
         }
         // if device doesn't have camera, disable camera button
@@ -866,6 +869,9 @@ protected void onNewIntent(Intent intent) {
             if (type.startsWith("image/")) {
                 // Handle single image being sent
                 handleSentImage(intent);
+            } else if ("text/plain".equals(type)) {
+                // Handle text being sent
+                handleSentText(intent);
             }
         }
 
@@ -904,6 +910,20 @@ protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         }
     }
 
+    /**
+     * Function invoked when a user shares a text with the zulip app
+     * @param intent passed to the activity with action SEND
+     */
+    private void handleSentText(Intent intent) {
+        String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
+        if (sharedText != null) {
+            // Update UI to reflect text being shared
+            displayFAB(false);
+            displayChatBox(true);
+            messageEt.append(" " + sharedText);
+        }
+    }
+
     /**
      * Function invoked when a user shares an image with the zulip app
      *