自动检查更新

cbwang2016 · Dec 4, 2018 · 2e206e5 · 2e206e5
1 parent 7c11c52
commit 2e206e5
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Showing 4 changed files with 81 additions and 8 deletions.
diff --git a/app/build.gradle b/app/build.gradle
@@ -7,8 +7,8 @@ android {
  applicationId "edu_cn.pku.course.pkucourse"
  minSdkVersion 15
  targetSdkVersion 28
- versionCode 1
- versionName "1.0"
+ versionCode 1000
+ versionName "beta v0.1.5"
  testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  vectorDrawables.useSupportLibrary = true
  }

diff --git a/app/src/main/java/edu_cn/pku/course/Utils.java b/app/src/main/java/edu_cn/pku/course/Utils.java
@@ -38,7 +38,7 @@
 import edu_cn.pku.course.activities.SplashActivity;
 
 public class Utils {
- private static final String versionString = "beta v0.1.4";
+ public static final String versionString = "beta v0.1.5";
  public static final String errorPrefix = "Error: ";
  public static final String errorPasswordIncorrect = "Password Incorrect";
  private static final String errorSubstrings = "error when extracting substrings";
@@ -312,4 +312,24 @@ public static String getPortalSession() {
  }
  }
  }
+
+ static public String getGithubApiResponse() {
+ HttpURLConnection conn = null;
+ try {
+ String request = "https://api.github.com/repos/cbwang2016/PKUCourses/releases/latest";
+ URL url = new URL(request);
+ conn = (HttpURLConnection) url.openConnection();
+ conn.setRequestMethod("GET");
+ conn.setUseCaches(false);
+ InputStream in = conn.getInputStream();
+
+ return convertStreamToString(in);
+ } catch (Exception e) {
+ return errorPrefix + e.getMessage();
+ } finally {
+ if (conn != null) {
+ conn.disconnect();
+ }
+ }
+ }
 }
diff --git a/app/src/main/java/edu_cn/pku/course/activities/MainActivity.java b/app/src/main/java/edu_cn/pku/course/activities/MainActivity.java
@@ -5,6 +5,8 @@
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.net.Uri;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.support.annotation.NonNull;
@@ -21,9 +23,13 @@
 import android.view.View;
 import android.widget.TextView;
 
+import org.json.JSONException;
+import org.json.JSONObject;
+
 import java.util.ArrayList;
 import java.util.List;
 
+import edu_cn.pku.course.Utils;
 import edu_cn.pku.course.adapter.FragmentAdapter;
 import edu_cn.pku.course.fragments.AnnouncementListFragment;
 import edu_cn.pku.course.fragments.CourseListFragment;
@@ -111,6 +117,10 @@ protected void onCreate(Bundle savedInstanceState) {
  setTitle(navigationView.getMenu().getItem(launch_page_index).getTitle());
  navigationView.getMenu().getItem(launch_page_index).setChecked(true);
  view_pager_main.setCurrentItem(launch_page_index);
+
+ if (sp.getBoolean("auto_check_update", true)) {
+ new CheckUpdateTask().execute((Void) null);
+ }
  }
 
  private boolean checkLongPressHint() {
@@ -212,4 +222,47 @@ private void signOut() {
  startActivity(intent);
  finish();
  }
+
+ @SuppressLint("StaticFieldLeak")
+ private class CheckUpdateTask extends AsyncTask<Void, Void, String> {
+ CheckUpdateTask() {
+ }
+
+ @Override
+ protected String doInBackground(Void... params) {
+ return Utils.getGithubApiResponse();
+ }
+
+
+ @Override
+ protected void onPostExecute(final String str) {
+ if (!str.startsWith(Utils.errorPrefix)) {
+ try {
+ JSONObject jo = new JSONObject(str);
+ String latestVersionName = jo.getString("name");
+ if (!latestVersionName.equals(Utils.versionString)) {
+ String latestReleaseBody = jo.getString("body");
+ final String latestReleaseDownloadUrl = ((JSONObject) jo.getJSONArray("assets").get(0)).getString("browser_download_url");
+
+ AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this, R.style.AlertDialogTheme);
+ builder.setTitle("检测到新版本: " + latestVersionName);
+ builder.setMessage("更新内容：\n" + latestReleaseBody);
+ builder.setPositiveButton("下载", new DialogInterface.OnClickListener() {
+ public void onClick(DialogInterface dialog, int whichButton) {
+ Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(latestReleaseDownloadUrl));
+ startActivity(browserIntent);
+ }
+ });
+ builder.setNegativeButton("取消", null).show();
+ }
+ } catch (JSONException e) {
+// e.printStackTrace();
+ }
+ }
+ }
+
+ @Override
+ protected void onCancelled() {
+ }
+ }
 }
diff --git a/app/src/main/res/xml/preferences_settings.xml b/app/src/main/res/xml/preferences_settings.xml
@@ -2,11 +2,11 @@
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
 
  <PreferenceCategory android:title="@string/settings_category_basic">
- <!--<SwitchPreference-->
- <!--android:defaultValue="true"-->
- <!--android:key="example_switch"-->
- <!--android:summary="@string/settings_switch_preference_summary"-->
- <!--android:title="@string/settings_switch_preference_title" />-->
+ <SwitchPreference
+  android:defaultValue="true"
+  android:key="auto_check_update"
+  android:summary="每次程序启动时会检查更新"
+  android:title="自动检查更新" />
 
  <!-- NOTE: Hide buttons to simplify the UI. Users can touch outside the dialog to dismiss it. -->
  <!-- NOTE: ListPreference's summary should be set to its value by the activity code. -->