增加一些注释

app/src/main/java/com/hnjc/wjtx/LaunchActivity.java

@@ -40,13 +40,18 @@ public class LaunchActivity extends Activity {
     private String baseVersion = ZERO_VERSION;
     // 远程的版本号
     private String remoteVersion = ZERO_VERSION;
+    // 在检查版本阶段, 进度条下显示的文字
     private String versionStr;
+    // 在下载更新版本阶段, 进度条下显示的文字
     private String downloadStr;
+    // 在解压版本阶段, 进度条下显示的文字
     private String unzipStr;
-
-    private TaskInfo info;//任务信息
-    private DownloadRunnable runnable;//下载任务
-    private UnzipRunnable unzipRunnable; // 解压任务
+    //任务信息
+    private TaskInfo info;
+    //下载任务
+    private DownloadRunnable runnable;
+    // 解压任务
+    private UnzipRunnable unzipRunnable;
 
     private static final String[] permissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
 
@@ -98,12 +103,22 @@ public class LaunchActivity extends Activity {
         compareVersions();
     }
 
+    /**
+     * 更新进度条的进度
+     * @param val 进度 0 - 100
+     */
     private void updateProgress(int val) {
         progressBar.setProgress(val);
     }
+
+    /**
+     * 更新进度条下面的文字
+     * @param title 要显示的内容
+     */
     private void changeLoadTxt(String title) {
         progressLabel.setText(title);
     }
+    // 获取代码包, 预加载目录和远程的版本
     private void compareVersions() {
         changeLoadTxt(versionStr);
         updateProgress(10);
@@ -157,6 +172,7 @@ public class LaunchActivity extends Activity {
      */
     private void getRemoteVersionInfo() {
         webApi.getVersionInfo((success, message, err) -> {
+            boolean needUpdate = false;
             if (success) {
                 try {
                     remoteVersion = message.getString("version");
@@ -165,7 +181,6 @@ public class LaunchActivity extends Activity {
                     Log.i(TAG, "local version: " + localVersion);
                     Log.i(TAG, "remote version: " + remoteVersion);
                     Log.i(TAG, "remote resource: " + zipUrl);
-                    boolean needUpdate = false;
                     if (StringUtil.compareAppVersion(baseVersion, localVersion) >= 0) {
                         if (StringUtil.compareAppVersion(remoteVersion, baseVersion) > 0) {
                             needUpdate = true;
@@ -175,6 +190,11 @@ public class LaunchActivity extends Activity {
                             needUpdate = true;
                         }
                     }
+
+                } catch (JSONException e) {
+                    e.printStackTrace();
+                }
+            }
             if (needUpdate) {
                 if (StringUtil.isBlank(zipUrl)) {
                     Log.e(TAG, "远程版本高于代码包版本和预加载版本, 需要更新, 但未获取到远程资源地址");
@@ -187,16 +207,9 @@ public class LaunchActivity extends Activity {
             } else {
                 startMain();
             }
-
-                } catch (JSONException e) {
-                    e.printStackTrace();
-                    startMain();
-                }
-            } else {
-                startMain();
-            }
         });
     }
+    // 更新远程资源
     private void preloadGame() {
         String dir = preloadPath + getFileDirByUrl(gameUrl);
         File dirFile = new File(dir);
@@ -205,7 +218,7 @@ public class LaunchActivity extends Activity {
         }
         downloadGameRes(zipUrl, dir);
     }
-
+    // 下载资源
     private void downloadGameRes(final String zipUrl, String targetDir) {
         updateProgress(0);
         changeLoadTxt(downloadStr);
@@ -217,7 +230,7 @@ public class LaunchActivity extends Activity {
         //开始Handler循环
         handler.sendEmptyMessageDelayed(1, 200);
     }
-
+    // 解压资源
     private void unzip(File file) {
         updateProgress(0);
         changeLoadTxt(unzipStr);
@@ -229,12 +242,20 @@ public class LaunchActivity extends Activity {
         handler.sendEmptyMessageDelayed(1, 200);
     }
 
-
+    /**
+     * 根据url生成在预加载目录中的路径
+     * @param urlString 资源的url
+     * @return  资源对应的本地路径
+     */
     private static String getFileDirByUrl(String urlString) {
         int lastSlash = urlString.lastIndexOf('/');
         String server = urlString.substring(0, lastSlash + 1);
         return server.replaceFirst("://", "/").replace(":", "#0A");
     }
+
+    /**
+     * 清空本地预加载目录
+     */
     private void emptyPreload() {
         File dirFile = new File(preloadPath);
         if (dirFile.exists() && dirFile.isDirectory()) {
@@ -244,6 +265,11 @@ public class LaunchActivity extends Activity {
             }
         }
     }
+
+    /**
+     * 遍历删除文件夹和子文件夹
+     * @param file  要删除的文件或文件夹路径
+     */
     private void deletePreloadFile(File file) {
         if (file.isDirectory()) {
             File[] files = file.listFiles();
@@ -255,11 +281,16 @@ public class LaunchActivity extends Activity {
             file.delete();
         }
     }
+
+    /**
+     * 切换至game activity
+     */
     private void startMain() {
         Intent intent = new Intent(LaunchActivity.this, MainActivity.class);
         intent.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
         intent.putExtra("preloadPath", preloadPath);
         startActivity(intent);
+        // 移除activity的进场动画
         overridePendingTransition(0, 0);
         finish();
     }
@@ -275,6 +306,7 @@ public class LaunchActivity extends Activity {
     @Override
     public void finish() {
         super.finish();
+        // 移除activity的移出场动画
         overridePendingTransition(0, 0);
     }