Add top activity and top scene for Crash

app/src/main/java/com/hippo/ehviewer/ui/EhActivity.java

@@ -0,0 +1,64 @@
+/*
+ * 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.ehviewer.ui;
+
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+
+import com.google.analytics.tracking.android.EasyTracker;
+import com.hippo.ehviewer.EhApplication;
+import com.hippo.ehviewer.Settings;
+
+public class EhActivity extends AppCompatActivity {
+
+    private boolean mTrackStarted;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        ((EhApplication) getApplication()).registerActivity(this);
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+
+        ((EhApplication) getApplication()).unregisterActivity(this);
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+
+        if (Settings.getEnableAnalytics()) {
+            EasyTracker.getInstance(this).activityStart(this);
+            mTrackStarted = true;
+        }
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+
+        if (mTrackStarted) {
+            EasyTracker.getInstance(this).activityStop(this);
+            mTrackStarted = false;
+        }
+    }
+}