Add analytics settings

app/src/main/java/com/hippo/ehviewer/Settings.java

@@ -392,7 +392,7 @@ public class Settings {
         putBoolean(KEY_ASK_ANALYTICS, value);
     }
 
-    private static final String KEY_ENABLE_ANALYTICS = "enable_analytics";
+    public static final String KEY_ENABLE_ANALYTICS = "enable_analytics";
     private static final boolean DEFAULT_ENABLE_ANALYTICS = false;
 
     public static boolean getEnableAnalytics() {

app/src/main/java/com/hippo/ehviewer/ui/fragment/AboutFragment.java

@@ -17,15 +17,32 @@
 package com.hippo.ehviewer.ui.fragment;
 
 import android.os.Bundle;
+import android.preference.Preference;
 import android.preference.PreferenceFragment;
 
+import com.hippo.ehviewer.Analytics;
 import com.hippo.ehviewer.R;
+import com.hippo.ehviewer.Settings;
 
-public class AboutFragment extends PreferenceFragment {
+public class AboutFragment extends PreferenceFragment implements Preference.OnPreferenceChangeListener {
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         addPreferencesFromResource(R.xml.about_settings);
+
+        Preference enableAnalytics = findPreference(Settings.KEY_ENABLE_ANALYTICS);
+        enableAnalytics.setOnPreferenceChangeListener(this);
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        String key = preference.getKey();
+        if (Settings.KEY_ENABLE_ANALYTICS.equals(key)) {
+            if (newValue instanceof Boolean && (Boolean) newValue) {
+                Analytics.start(getActivity());
+            }
+        }
+        return true;
     }
 }

app/src/main/java/com/hippo/preference/SimpleDialogPreference.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.preference;
+
+import android.annotation.TargetApi;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.os.Build;
+import android.preference.DialogPreference;
+import android.util.AttributeSet;
+
+import com.hippo.ehviewer.R;
+import com.hippo.text.Html;
+
+// TODO Add html attr
+// TODO Add url clickable
+public class SimpleDialogPreference extends DialogPreference {
+
+    private CharSequence mMessage;
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    public SimpleDialogPreference(Context context) {
+        super(context);
+        init(context, null, 0, 0);
+    }
+
+    public SimpleDialogPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context, attrs, 0, 0);
+    }
+
+    public SimpleDialogPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init(context, attrs, defStyleAttr, 0);
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    public SimpleDialogPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        init(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    public void init(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SimpleDialogPreference, defStyleAttr, defStyleRes);
+        setMessage(a.getString(R.styleable.SimpleDialogPreference_message));
+        a.recycle();
+    }
+
+    public void setMessage(String message) {
+        mMessage = Html.fromHtml(message);
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
+        super.onPrepareDialogBuilder(builder);
+        builder.setMessage(mMessage);
+        builder.setPositiveButton(android.R.string.ok, null);
+        builder.setNegativeButton(null, null);
+    }
+}