Show version name in about

app/src/main/java/com/hippo/ehviewer/preference/VersionPreference.java

@@ -0,0 +1,57 @@
+/*
+ * 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.preference;
+
+import android.content.Context;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.preference.Preference;
+import android.util.AttributeSet;
+
+import com.hippo.ehviewer.R;
+
+public class VersionPreference extends Preference {
+
+    public VersionPreference(Context context) {
+        super(context);
+        init(context);
+    }
+
+    public VersionPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context);
+    }
+
+    public VersionPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init(context);
+    }
+
+    private void init(Context context) {
+        setTitle(R.string.settings_about_version);
+
+        String version;
+        try {
+            PackageInfo pInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
+            version = pInfo.versionName;
+        } catch (PackageManager.NameNotFoundException e) {
+            e.printStackTrace();
+            version = context.getString(R.string.error_unknown);
+        }
+        setSummary(version);
+    }
+}