Pebble: add a FAB in App Manager which launches a file manager to chose a file

This is similar to #247 but simpler and using a FAB, also it explicitly targets our Activity instead of allowing to open a video in a video player which using this feature
Also suggested in #520

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/appmanager/AppManagerActivity.java

@@ -1,16 +1,19 @@
 package nodomain.freeyourgadget.gadgetbridge.activities.appmanager;
 
+import android.app.Activity;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.os.Bundle;
+import android.support.design.widget.FloatingActionButton;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.NavUtils;
 import android.support.v4.content.LocalBroadcastManager;
 import android.support.v4.view.ViewPager;
 import android.view.MenuItem;
+import android.view.View;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -28,6 +31,7 @@ import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.R;
 import nodomain.freeyourgadget.gadgetbridge.activities.AbstractFragmentPagerAdapter;
 import nodomain.freeyourgadget.gadgetbridge.activities.AbstractGBFragmentActivity;
+import nodomain.freeyourgadget.gadgetbridge.activities.FwAppInstallerActivity;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.util.FileUtils;
 
@@ -35,6 +39,7 @@ import nodomain.freeyourgadget.gadgetbridge.util.FileUtils;
 public class AppManagerActivity extends AbstractGBFragmentActivity {
 
     private static final Logger LOG = LoggerFactory.getLogger(AbstractAppManagerFragment.class);
+    private int READ_REQUEST_CODE = 42;
 
     private GBDevice mGBDevice = null;
 
@@ -68,6 +73,18 @@ public class AppManagerActivity extends AbstractGBFragmentActivity {
             throw new IllegalArgumentException("Must provide a device when invoking this activity");
         }
 
+        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
+        assert fab != null;
+        fab.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
+                intent.addCategory(Intent.CATEGORY_OPENABLE);
+                intent.setType("*/*");
+                startActivityForResult(intent, READ_REQUEST_CODE);
+            }
+        });
+
         IntentFilter filterLocal = new IntentFilter();
         filterLocal.addAction(GBApplication.ACTION_QUIT);
         filterLocal.addAction(GBDevice.ACTION_DEVICE_CHANGED);
@@ -93,7 +110,7 @@ public class AppManagerActivity extends AbstractGBFragmentActivity {
 
     public class SectionsPagerAdapter extends AbstractFragmentPagerAdapter {
 
-        public SectionsPagerAdapter(FragmentManager fm) {
+        SectionsPagerAdapter(FragmentManager fm) {
             super(fm);
         }
 
@@ -179,6 +196,16 @@ public class AppManagerActivity extends AbstractGBFragmentActivity {
         return uuids;
     }
 
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent resultData) {
+        if (requestCode == READ_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
+            Intent startIntent = new Intent(AppManagerActivity.this, FwAppInstallerActivity.class);
+            startIntent.setAction(Intent.ACTION_VIEW);
+            startIntent.setDataAndType(resultData.getData(), null);
+            startActivity(startIntent);
+        }
+    }
+
     @Override
     protected void onDestroy() {
         LocalBroadcastManager.getInstance(this).unregisterReceiver(mReceiver);

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

@@ -1,17 +1,10 @@
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     xmlns:tools="http://schemas.android.com/tools"
     tools:context="nodomain.freeyourgadget.gadgetbridge.activities.appmanager.AbstractAppManagerFragment">
-
-    <FrameLayout
-        android:layout_width="match_parent"
-        android:layout_height="fill_parent">
-
         <com.woxthebox.draglistview.DragListView
             android:id="@+id/appListView"
             android:layout_width="match_parent"
             android:layout_height="fill_parent" />
-    </FrameLayout>
+</RelativeLayout>
-
-</FrameLayout>

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

@@ -2,6 +2,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:paddingBottom="0px"
     android:paddingLeft="0px"
     android:paddingRight="0px"
@@ -28,5 +29,17 @@
         </android.support.v4.view.ViewPager>
 
     </LinearLayout>
+    <android.support.design.widget.FloatingActionButton
+        android:id="@+id/fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentEnd="true"
+        android:layout_gravity="bottom|end"
+        android:src="@drawable/ic_add_white"
+        app:elevation="6dp"
+        app:pressedTranslationZ="12dp"
+        android:layout_marginBottom="10dp"
+        android:layout_marginRight="10dp" />
 
 </android.widget.RelativeLayout>