Webview: fix behaviour of toolbar back button and simplify.

app/src/main/AndroidManifest.xml

@@ -194,11 +194,7 @@
             android:label="@string/debug_info_title">
         </activity>
 
-        <activity
-            android:name=".ui.WebViewActivity"
-            android:label="@string/app_name"
-            android:theme="@style/AppTheme.NoActionBar"
-            android:parentActivityName=".ui.AccountsActivity"/>
+        <activity android:name=".ui.WebViewActivity" />
 
         <provider
             android:name="android.support.v4.content.FileProvider"

app/src/main/java/com/etesync/syncadapter/ui/WebViewActivity.java

@@ -7,9 +7,11 @@ import android.content.Intent;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
+import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.view.KeyEvent;
+import android.view.MenuItem;
 import android.view.View;
 import android.webkit.WebChromeClient;
 import android.webkit.WebResourceError;
@@ -28,7 +30,7 @@ public class WebViewActivity extends AppCompatActivity {
 
     private WebView mWebView;
     private ProgressBar mProgressBar;
-    private Toolbar mToolbar;
+    private ActionBar mToolbar;
 
     public static void openUrl(Context context, Uri uri) {
         Intent intent = new Intent(context, WebViewActivity.class);
@@ -41,9 +43,9 @@ public class WebViewActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_webview);
-        mToolbar = (Toolbar) findViewById(R.id.toolbar);
-        setSupportActionBar(mToolbar);
-        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+
+        mToolbar = getSupportActionBar();
+        mToolbar.setDisplayHomeAsUpEnabled(true);
 
         Uri uri = getIntent().getParcelableExtra(KEY_URL);
         uri = addQueryParams(uri);
@@ -86,7 +88,6 @@ public class WebViewActivity extends AppCompatActivity {
         mWebView.setWebChromeClient(new WebChromeClient() {
 
             public void onProgressChanged(WebView view, int progress) {
-                mToolbar = (Toolbar) findViewById(R.id.toolbar);
                 if (progress == 100) {
                     mToolbar.setTitle(view.getTitle());
                     mProgressBar.setVisibility(View.INVISIBLE);
@@ -194,4 +195,15 @@ public class WebViewActivity extends AppCompatActivity {
         }
         return super.onKeyDown(keyCode, event);
     }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == android.R.id.home) {
+            if (!getSupportFragmentManager().popBackStackImmediate()) {
+                finish();
+            }
+            return true;
+        }
+        return false;
+    }
 }

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

@@ -1,34 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:fitsSystemWindows="true"
     android:orientation="vertical">
 
-    <android.support.design.widget.AppBarLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        app:theme="@style/ThemeOverlay.AppCompat.ActionBar">
-
-        <android.support.v7.widget.Toolbar
-            android:id="@+id/toolbar"
-            android:layout_width="match_parent"
-            android:layout_height="?attr/actionBarSize"/>
-        <ProgressBar
-            android:id="@+id/progressBar"
-            style="?android:attr/progressBarStyleHorizontal"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_marginBottom="-8dp"
-            android:layout_marginTop="-8dp"
-            android:max="100"
-            android:maxHeight="1dp"/>
-    </android.support.design.widget.AppBarLayout>
     <WebView
         android:id="@+id/webView"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        style="?android:attr/progressBarStyleHorizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="-8dp"
+        android:layout_marginTop="-8dp"
+        android:max="100"
+        android:maxHeight="1dp" />
 </android.support.design.widget.CoordinatorLayout>