changelog popup initial working draft

app/src/main/java/org/mian/gitnex/activities/MainActivity.java

@@ -32,6 +32,7 @@ import org.mian.gitnex.fragments.SettingsFragment;
 import org.mian.gitnex.fragments.StarredRepositoriesFragment;
 import org.mian.gitnex.helpers.AlertDialogs;
 import org.mian.gitnex.helpers.Authorization;
+import org.mian.gitnex.helpers.ChangeLog;
 import org.mian.gitnex.helpers.Toasty;
 import org.mian.gitnex.models.GiteaVersion;
 import org.mian.gitnex.models.UserInfo;
@@ -285,6 +286,10 @@ public class MainActivity extends BaseActivity implements NavigationView.OnNavig
 
         }
 
+        // Changelog popup
+        ChangeLog changelogDialog = new ChangeLog(this);
+        changelogDialog.showDialog();
+
     }
 
     public void setActionBarTitle (@NonNull String title) {

app/src/main/java/org/mian/gitnex/helpers/ChangeLog.java

@@ -0,0 +1,102 @@
+package org.mian.gitnex.helpers;
+
+import java.io.IOException;
+import java.util.Objects;
+import org.mian.gitnex.R;
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+import android.app.Activity;
+import android.content.pm.PackageManager;
+import android.content.res.Resources;
+import android.content.res.XmlResourceParser;
+import android.text.Html;
+import android.util.Log;
+import androidx.appcompat.app.AlertDialog;
+
+/**
+ * Author M M Arif
+ */
+
+public class ChangeLog {
+
+    static final private String TAG = "ChangeLog";
+    static final private String CHANGELOG_XML_NODE = "changelog";
+	
+    private Activity changelogActivity;
+    
+	public ChangeLog(Activity context) {
+		changelogActivity = context;
+    }
+
+	private String ParseReleaseTag(XmlResourceParser aXml) throws XmlPullParserException, IOException {
+
+		StringBuilder strBuilder = new StringBuilder(aXml.getAttributeValue(null, "version") + "<br>");
+		int eventType = aXml.getEventType();
+
+		while ((eventType != XmlPullParser.END_TAG) || (aXml.getName().equals("change"))) {
+
+			if ((eventType == XmlPullParser.START_TAG) &&(aXml.getName().equals("change"))) {
+				eventType = aXml.next();
+				strBuilder.append(aXml.getText()).append("<br>");
+			}
+			eventType = aXml.next();
+
+		}
+		strBuilder.append("<br>");
+
+		return strBuilder.toString();
+
+	}
+
+	private String getChangelog(int resId, Resources res) {
+
+		StringBuilder strBuilder = new StringBuilder();
+		try (XmlResourceParser xml = res.getXml(resId)) {
+
+			int eventType = xml.getEventType();
+			while (eventType != XmlPullParser.END_DOCUMENT) {
+
+				if ((eventType == XmlPullParser.START_TAG) && (xml.getName().equals("release"))) {
+					strBuilder.append(ParseReleaseTag(xml));
+
+				}
+				eventType = xml.next();
+
+			}
+
+		}
+		catch (XmlPullParserException | IOException e) {
+			Log.e(TAG, Objects.requireNonNull(e.getMessage()));
+		}
+
+		return strBuilder.toString();
+
+	}
+
+	public void showDialog() {
+
+		String packageName = changelogActivity.getPackageName();
+		Resources res = null;
+
+		try {
+			res = changelogActivity.getPackageManager().getResourcesForApplication(packageName);
+		}
+		catch (PackageManager.NameNotFoundException e) {
+			Log.e(TAG, Objects.requireNonNull(e.getMessage()));
+		}
+
+		assert res != null;
+		int resId = res.getIdentifier(CHANGELOG_XML_NODE, "xml", packageName);
+
+		String changelogMessage = getChangelog(resId, res);
+
+		androidx.appcompat.app.AlertDialog.Builder builder = new AlertDialog.Builder(changelogActivity);
+		builder.setTitle(R.string.changelogTitle);
+		builder.setMessage(Html.fromHtml("<small>" + changelogMessage + "</small>"));
+		builder.setNegativeButton(R.string.okButton, (dialog, which) -> dialog.cancel());
+		builder.create();
+		builder.show();
+
+	}
+
+}

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

@@ -560,4 +560,7 @@
     <string name="shareIssue">Share Issue</string>
     <string name="shareRepository">Share Repository</string>
     <string name="createRepository">Create Repository</string>
+
+    <string name="changelogTitle" translatable="false">Changelog</string>
+
 </resources>

app/src/main/res/xml/changelog.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<changelog>
+
+    <release version="2.4.0" versioncode="90">
+        <change>New: Light theme (choose from settings)</change>
+        <change>New: Icons</change>
+        <change>New: Download files in Fileviewer (needs write permission)</change>
+        <change>New: Custom fonts (choose from settings)</change>
+        <change>New: PDF support in Fileviewer</change>
+        <change>New: Night mode for PDF in Fileviewer (choose from settings)</change>
+        <change>New: Default list of repositories in Explore screen</change>
+        <change>New: Latvian language support</change>
+        <change>Improvement: Support more files in file viewer syntax highlighter</change>
+        <change>Improvement: Exclude BIN files rendering in diff viewer</change>
+        <change>Improvement: Exclude specific files in Fileviewer like doc, xls etc</change>
+        <change>Improvement: Single issue id and support copy title and description to clipboard</change>
+        <change>Improvement: Translation updates</change>
+        <change>Bugfix: Don’t refresh repositories without action</change>
+    </release>
+
+    <release version="2.3.2" versioncode="82">
+        <change>Bugfix: Slashes in URL(file viewer)</change>
+        <change>Bugfix: No milestones when creating issue if user has other language selected</change>
+    </release>
+
+</changelog>