How to remove departures from Android 7?

Mistake:

Android App has stopped. Open app again.

I use the code:

Android Manifest:

<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme" android:hardwareAccelerated="true"> <activity android:name="riddle.russia.MainActivity" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> 

MainActivity:

 public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); String url ="file:///android_asset/index.html"; WebView view= (WebView) this.findViewById(R.id.webView); view.getSettings().setJavaScriptEnabled(true); view.loadUrl(url); view.getSettings().setDomStorageEnabled(true); view.getSettings().setLoadWithOverviewMode(true); view.getSettings().setUseWideViewPort(true); view.getSettings().setBuiltInZoomControls(true); view.setInitialScale(1); } } 

activity_main:

 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="riddle.russia.MainActivity"> <WebView android:id="@+id/webView" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_alignParentTop="true" android:layout_alignParentStart="true" /> </RelativeLayout> 

How to solve this problem?