mvp for logger warning

app/src/main/java/net/headlezz/notificationlogger/MainActivity.java

@@ -1,22 +1,25 @@
 package net.headlezz.notificationlogger;
 
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.Snackbar;
 import android.support.v7.app.AppCompatActivity;
+import android.support.v7.preference.PreferenceManager;
 import android.support.v7.widget.Toolbar;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 
 import net.headlezz.notificationlogger.createnotification.NotificationCreationFragment;
+import net.headlezz.notificationlogger.presenter.LoggerWarningPresenter;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
-import timber.log.Timber;
 
-public class MainActivity extends AppCompatActivity {
+public class MainActivity extends AppCompatActivity implements SharedPreferences.OnSharedPreferenceChangeListener, LoggerWarningPresenter.LoggerWarningView {
 
     @Bind(R.id.toolbar)
     Toolbar mToolbar;
@@ -24,14 +27,21 @@ public class MainActivity extends AppCompatActivity {
     @Bind(R.id.main_menu_fab_add_notification)
     FloatingActionButton mFAB;
 
+    SharedPreferences mSharedPrefs;
+
+    LoggerWarningPresenter mLoggerWarningPresenter;
+    Snackbar mLoggerWarningView;
+
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main_activity);
         ButterKnife.bind(this);
-
         setSupportActionBar(mToolbar);
 
+        mSharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);
+        mLoggerWarningPresenter = new LoggerWarningPresenter(this);
+
         mFAB.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -53,6 +63,19 @@ public class MainActivity extends AppCompatActivity {
             mFAB.setVisibility(View.GONE);
     }
 
+    @Override
+    protected void onStart() {
+        super.onStart();
+        mSharedPrefs.registerOnSharedPreferenceChangeListener(this);
+        mLoggerWarningPresenter.setCurrentLoggerPreference(mSharedPrefs.getBoolean("pref_logging_enabled", true));
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        mSharedPrefs.unregisterOnSharedPreferenceChangeListener(this);
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         getMenuInflater().inflate(R.menu.main_activity, menu);
@@ -94,4 +117,41 @@ public class MainActivity extends AppCompatActivity {
         }
         super.onBackPressed();
     }
+
+    @Override
+    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+        if (key.equals("pref_logging_enabled"))
+            mLoggerWarningPresenter.setCurrentLoggerPreference(sharedPreferences.getBoolean("pref_logging_enabled", true));
+    }
+
+    @Override
+    public void showLoggerWarning() {
+        if (mLoggerWarningView == null) {
+            mLoggerWarningView = Snackbar.make(findViewById(R.id.viewholder), R.string.main_snack_logging_disabled_warning, Snackbar.LENGTH_INDEFINITE);
+            mLoggerWarningView.setAction(R.string.main_snack_logging_disabled_warning_action, new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    mSharedPrefs.edit().putBoolean("pref_logging_enabled", true).apply();
+                }
+            });
+            // fix for FAB not moving down after dismiss
+            mLoggerWarningView.getView().addOnAttachStateChangeListener(new View.OnAttachStateChangeListener() {
+                @Override
+                public void onViewAttachedToWindow(View v) {
+                }
+
+                @Override
+                public void onViewDetachedFromWindow(View v) {
+                    mFAB.setTranslationY(0);
+                }
+            });
+        }
+        mLoggerWarningView.show();
+    }
+
+    @Override
+    public void hideLoggerWarning() {
+        if (mLoggerWarningView != null && mLoggerWarningView.isShownOrQueued())
+            mLoggerWarningView.dismiss();
+    }
 }

app/src/main/java/net/headlezz/notificationlogger/presenter/LoggerWarningPresenter.java

@@ -0,0 +1,23 @@
+package net.headlezz.notificationlogger.presenter;
+
+public class LoggerWarningPresenter {
+
+    public interface LoggerWarningView {
+        void showLoggerWarning();
+        void hideLoggerWarning();
+    }
+
+    LoggerWarningView mView;
+
+    public LoggerWarningPresenter(LoggerWarningView lwv) {
+        mView = lwv;
+    }
+
+    public void setCurrentLoggerPreference(boolean loggingEnabled) {
+        if(loggingEnabled)
+            mView.hideLoggerWarning();
+        else
+            mView.showLoggerWarning();
+    }
+
+}

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

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/viewholder"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent">

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

@@ -3,6 +3,9 @@
     <string name="menu_item_settings">Settings</string>
     <string name="title_settings">Settings</string>
 
+    <string name="main_snack_logging_disabled_warning">Logging is disabled.</string>
+    <string name="main_snack_logging_disabled_warning_action">Enable</string>
+
     <string name="pref_category_notification_settings">Notification Settings</string>
     <string name="pref_category_support">Support</string>
     <string name="pref_logging_enabled_title">Notification Logging</string>