Implement file picker and install methods into Modules section.

Tested and working.

app/src/main/java/com/topjohnwu/magisk/ModulesFragment.java

@@ -1,8 +1,12 @@
 package com.topjohnwu.magisk;
 
+import android.app.Activity;
+import android.content.Intent;
+import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
+import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.TabLayout;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
@@ -17,8 +21,11 @@ import android.view.ViewGroup;
 import android.widget.ProgressBar;
 
 import com.topjohnwu.magisk.module.Module;
+import com.topjohnwu.magisk.utils.Shell;
 import com.topjohnwu.magisk.utils.Utils;
 
+import java.io.File;
+import java.io.FileNotFoundException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.ExecutionException;
@@ -30,8 +37,11 @@ public class ModulesFragment extends Fragment {
 
     public static List<Module> listModules = new ArrayList<>();
     public static List<Module> listModulesCache = new ArrayList<>();
+    private static final int FILE_SELECT_CODE = 0;
+    private File input;
 
     @BindView(R.id.progressBar) ProgressBar progressBar;
+    @BindView(R.id.fab) FloatingActionButton fabio;
     @BindView(R.id.pager) ViewPager viewPager;
     @BindView(R.id.tab_layout) TabLayout tabLayout;
 
@@ -51,8 +61,32 @@ public class ModulesFragment extends Fragment {
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         super.onCreateOptionsMenu(menu, inflater);
         inflater.inflate(R.menu.menu_module, menu);
+        fabio.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+
+                Intent intent = new Intent();
+                intent.setType("*/zip");
+                intent.setAction(Intent.ACTION_GET_CONTENT);
+                startActivityForResult(intent,FILE_SELECT_CODE);
+            }
+        });
     }
 
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+            case FILE_SELECT_CODE:
+                if (resultCode == Activity.RESULT_OK) {
+                    // Get the Uri of the selected file
+                    Uri uri = data.getData();
+                    String path = uri.getPath();
+                    String fileName = uri.getLastPathSegment();
+                    new Utils.FlashZIP(getActivity(), fileName, path).execute();
+
+                }
+                break;
+        }}
+
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {

app/src/main/res/drawable/ic_add.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
+</vector>