Add a switch to disable notifications

app/src/main/java/dummydomain/yetanothercallblocker/CallReceiver.java

@@ -1,8 +1,10 @@
 package dummydomain.yetanothercallblocker;
 
 import android.content.BroadcastReceiver;
+import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.telephony.TelephonyManager;
 
 import org.slf4j.Logger;
@@ -17,6 +19,20 @@ public class CallReceiver extends BroadcastReceiver {
 
     private static final Logger LOG = LoggerFactory.getLogger(CallReceiver.class);
 
+    public static boolean isEnabled(Context context) {
+        return context.getPackageManager()
+                .getComponentEnabledSetting(new ComponentName(context, CallReceiver.class))
+                != PackageManager.COMPONENT_ENABLED_STATE_DISABLED;
+    }
+
+    public static void setEnabled(Context context, boolean enable) {
+        context.getPackageManager().setComponentEnabledSetting(
+                new ComponentName(context, CallReceiver.class),
+                enable ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
+                        : PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+                PackageManager.DONT_KILL_APP);
+    }
+
     // TODO: handle in-call calls
 
     @Override

app/src/main/java/dummydomain/yetanothercallblocker/MainActivity.java

@@ -3,6 +3,7 @@ package dummydomain.yetanothercallblocker;
 import android.content.Intent;
 import android.support.annotation.NonNull;
 import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.SwitchCompat;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -14,6 +15,11 @@ public class MainActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
+        SwitchCompat notificationsSwitch = findViewById(R.id.notificationsEnabledSwitch);
+        notificationsSwitch.setChecked(CallReceiver.isEnabled(this));
+        notificationsSwitch.setOnCheckedChangeListener((buttonView, isChecked)
+                -> CallReceiver.setEnabled(MainActivity.this, isChecked));
+
         PermissionHelper.checkPermissions(this);
     }
 

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

@@ -1,9 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
+    android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:padding="@dimen/text_margin"
     tools:context=".MainActivity">
 
-</android.support.constraint.ConstraintLayout>
+    <android.support.v7.widget.SwitchCompat
+        android:id="@+id/notificationsEnabledSwitch"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/incoming_call_notifications_enabled" />
+</LinearLayout>

app/src/main/res/values/strings.xml

@@ -40,6 +40,9 @@
     <string name="sia_category_safe_nonprofit">Safe nonprofit</string>
 
     <string name="title_activity_reviews">Reviews</string>
+
+    <string name="incoming_call_notifications_enabled">Incoming call notifications enabled</string>
+
     <string name="open_debug_activity">Open debug screen</string>
     <string name="debug_activity_label">Debug</string>