增加了一个获取版本名的方法，自动获取，无需每次手动更改代码，并修改版本号至6--1.41

Android-final-exam-2020 · Jul 2, 2020 · adcc85b · adcc85b
1 parent 72f6208
commit adcc85b
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Showing 2 changed files with 28 additions and 3 deletions.
diff --git a/app/build.gradle b/app/build.gradle
@@ -8,8 +8,8 @@ android {
         applicationId "com.example.toolbox"
         minSdkVersion 21
         targetSdkVersion 29
-        versionCode 5
-        versionName "1.4"
+        versionCode 6
+        versionName "1.41"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

diff --git a/app/src/main/java/com/example/toolbox/MainActivity.java b/app/src/main/java/com/example/toolbox/MainActivity.java
@@ -1,7 +1,11 @@
 package com.example.toolbox;
 
+import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -72,7 +76,7 @@ public boolean onOptionsItemSelected(MenuItem item) {
                 AlertDialog.Builder builder = new AlertDialog.Builder(this)
                         .setTitle("关于")
                         .setIcon(R.mipmap.ic_launcher)
-                        .setMessage("版　本：1.2\n开发者：李德银 于小雨 张守华")
+                        .setMessage("版　本：" + getAppVersionName(this) + "\n开发者：李德银 于小雨 张守华")
                         .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                             @Override
                             public void onClick(DialogInterface dialog, int which) {
@@ -85,4 +89,25 @@ public void onClick(DialogInterface dialog, int which) {
         }
         return super.onOptionsItemSelected(item);
     }
+
+    /**
+     * 返回当前程序版本名
+     */
+    public static String getAppVersionName(Context context) {
+        String versionName = "";
+        int versioncode = 0;
+        try {
+            // ---get the package info---
+            PackageManager pm = context.getPackageManager();
+            PackageInfo pi = pm.getPackageInfo(context.getPackageName(), 0);
+            versionName = pi.versionName;
+            versioncode = pi.versionCode;
+            if (versionName == null || versionName.length() <= 0) {
+                return "";
+            }
+        } catch (Exception e) {
+            Log.e("VersionInfo", "Exception", e);
+        }
+        return versionName;
+    }
 }