add Share button to "Installed Apps" to export CSV list

refs #1484

app/src/main/java/org/fdroid/fdroid/views/installed/InstalledAppListAdapter.java

@@ -6,7 +6,6 @@ import android.support.annotation.Nullable;
 import android.support.v7.widget.RecyclerView;
 import android.view.View;
 import android.view.ViewGroup;
-
 import org.fdroid.fdroid.R;
 import org.fdroid.fdroid.data.App;
 import org.fdroid.fdroid.data.Schema;
@@ -58,4 +57,13 @@ class InstalledAppListAdapter extends RecyclerView.Adapter<InstalledAppListItemC
         this.cursor = cursor;
         notifyDataSetChanged();
     }
+
+    @Nullable
+    public App getItem(int position) {
+        if (cursor == null) {
+            return null;
+        }
+        cursor.moveToPosition(position);
+        return new App(cursor);
+    }
 }

app/src/main/java/org/fdroid/fdroid/views/installed/InstalledAppsActivity.java

@@ -22,17 +22,20 @@ package org.fdroid.fdroid.views.installed;
 import android.database.Cursor;
 import android.os.Bundle;
 import android.support.v4.app.LoaderManager;
+import android.support.v4.app.ShareCompat;
 import android.support.v4.content.CursorLoader;
 import android.support.v4.content.Loader;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.Toolbar;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.view.View;
 import android.widget.TextView;
-
 import org.fdroid.fdroid.FDroidApp;
 import org.fdroid.fdroid.R;
+import org.fdroid.fdroid.data.App;
 import org.fdroid.fdroid.data.AppProvider;
 import org.fdroid.fdroid.data.Schema;
 
@@ -100,4 +103,35 @@ public class InstalledAppsActivity extends AppCompatActivity implements LoaderMa
         adapter.setApps(null);
     }
 
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.installed_apps, menu);
+        return super.onCreateOptionsMenu(menu);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+
+        switch (item.getItemId()) {
+            case R.id.menu_share:
+                StringBuilder stringBuilder = new StringBuilder();
+                stringBuilder.append("packageName,versionCode,versionName\n");
+                for (int i = 0; i < adapter.getItemCount(); i++) {
+                    App app = adapter.getItem(i);
+                    if (app != null) {
+                        stringBuilder.append(app.packageName).append(',')
+                                .append(app.installedVersionCode).append(',')
+                                .append(app.installedVersionName).append('\n');
+                    }
+                }
+                ShareCompat.IntentBuilder intentBuilder = ShareCompat.IntentBuilder.from(this)
+                        .setSubject(getString(R.string.send_installed_apps))
+                        .setChooserTitle(R.string.send_installed_apps)
+                        .setText(stringBuilder.toString())
+                        .setType("text/csv");
+                startActivity(intentBuilder.getIntent());
+                break;
+        }
+        return super.onOptionsItemSelected(item);
+    }
 }

app/src/main/res/menu/installed_apps.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+            android:id="@+id/menu_share"
+            android:icon="@drawable/ic_share_white"
+            android:title="@string/menu_share"
+            app:showAsAction="ifRoom"/>
+
+</menu>

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

@@ -110,6 +110,8 @@ This often occurs with apps installed via Google Play or other sources, if they
     <string name="app_list__dismiss_downloading_app">Download canceled</string>
 
     <string name="installed_apps__activity_title">Installed Apps</string>
+    <string name="send_installed_apps">Share installed apps</string>
+    <string name="send_installed_apps_csv">Apps installed by F-Droid as CSV file</string>
     <string name="installed_app__updates_ignored">Updates ignored</string>
     <string name="installed_app__updates_ignored_for_suggested_version">Updates ignored for Version %1$s</string>
     <!-- The inline download button shown in the "Updates" screen only uses an icon and so requires