[android] add refresh on swipe in webconsole

Signed-off-by: R4SAS <r4sas@i2pmail.org>

android/AndroidManifest.xml

@@ -18,6 +18,10 @@
         android:requestLegacyExternalStorage="true"
         android:theme="@android:style/Theme.Holo.Light.DarkActionBar"
         android:usesCleartextTraffic="true">
+        <meta-data
+            android:name="android.webkit.WebView.MetricsOptOut"
+            android:value="true"/>
+
         <activity android:name=".WebConsoleActivity"></activity>
 
         <receiver android:name=".NetworkStateChangeReceiver">

android/build.gradle

@@ -21,6 +21,7 @@ repositories {
 
 dependencies {
     implementation 'androidx.core:core:1.0.2'
+    implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
 }
 
 android {

android/res/layout/activity_web_console.xml

@@ -1,14 +1,22 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout android:id="@+id/layout_prompt"
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     tools:context=".WebConsoleActivity">
 
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent"
+        android:id="@+id/swipe">
+
         <WebView
             android:id="@+id/webview1"
             android:layout_width="fill_parent"
             android:layout_height="fill_parent" />
-</LinearLayout>
 
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
+
+</LinearLayout>

android/src/org/purplei2p/i2pd/WebConsoleActivity.java

@@ -2,14 +2,18 @@ package org.purplei2p.i2pd;
 
 import android.app.Activity;
 import android.os.Bundle;
+import android.os.Handler;
 import android.view.MenuItem;
 import android.webkit.WebSettings;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 
 import java.util.Objects;
 
 public class WebConsoleActivity extends Activity {
+    private WebView webView;
+    private SwipeRefreshLayout swipeRefreshLayout;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -18,19 +22,43 @@ public class WebConsoleActivity extends Activity {
 
         Objects.requireNonNull(getActionBar()).setDisplayHomeAsUpEnabled(true);
 
-        final WebView webView = findViewById(R.id.webview1);
+        webView = (WebView) findViewById(R.id.webview1);
         webView.setWebViewClient(new WebViewClient());
 
         final WebSettings webSettings = webView.getSettings();
         webSettings.setBuiltInZoomControls(true);
         webSettings.setJavaScriptEnabled(false);
         webView.loadUrl("http://127.0.0.1:7070"); // TODO: instead 7070 I2Pd....HttpPort
+
+        swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe);
+        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
+            @Override
+            public void onRefresh() {
+                swipeRefreshLayout.setRefreshing(true);
+                new Handler().postDelayed(new Runnable() {
+                    @Override
+                    public void run() {
+                        swipeRefreshLayout.setRefreshing(false);
+                        webView.reload();
+                    }
+                }, 1000);
+            }
+        });
+    }
+
+    @Override
+    public void onBackPressed() {
+        if (webView.canGoBack()) {
+            webView.goBack();
+        } else {
+            super.onBackPressed();
+        }
     }
 
     public boolean onOptionsItemSelected(MenuItem item) {
         int id = item.getItemId();
 
-        if (id==android.R.id.home) {
+        if (id == android.R.id.home) {
             finish();
             return true;
         }