Android应用内升级App

太过爱你忘了你带给我的痛 2023-07-19 04:58 15阅读 0赞

![20200329185922696.gif][]

### 文章目录 ###

*   *   *  一、主要流程
         *  二、主要知识点
         *   *  1.利用OkHttpClient实现网络请求(包括下载和取消下载)
             *  2.自定义Dialog
             *  3.利用md5对文件做完整性校验
             *  4.App应用的安装
         *  三、遇到的一些问题及解决办法
         *  四、源码

### 一、主要流程 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NDUzMjY2_size_16_color_FFFFFF_t_70]

### 二、主要知识点 ###

#### 1.利用OkHttpClient实现网络请求(包括下载和取消下载) ####

访问`http://59.110.162.30/app_updater_version.json`，得到更新的apk版本信息.

1.  定义接口包含所需的方法

/** * 提供网络接口进行调用: * 1.接口隔离具体的实现，解耦合 * 2.方便多个开发者并行开发 */
    public interface INetManager { 
       void get(String url, INetCallBack callBack,Object tag);
    
       void download(String url, File targetFile, INetDownloadCallBack downloadCallBack,Object tag);
    
       void cancel(Object tag);
    }

1.  具体的网络请求实现类使用OkHttpClient框架来实现

/** * 网络请求具体实现类:使用OKHttpClient框架来实现 */
    public class OkHttpNetManager implements INetManager { 
       private static final String TAG = "Selenium";
       private OkHttpClient okHttpClient;
       private Handler mHandler = new Handler(Looper.getMainLooper());
    
       public OkHttpNetManager() { 
           OkHttpClient.Builder builder = new OkHttpClient.Builder();
           okHttpClient = builder.connectTimeout(15, TimeUnit.SECONDS)
                   .build();
       }
    
    
       @Override
       public void get(String url, final INetCallBack callBack, Object tag) { 
           Request.Builder requestBuilder = new Request.Builder();
           Request request = requestBuilder.url(url).tag(tag).get().build();
           Call call = okHttpClient.newCall(request);
           //同步请求
           // Response response = call.execute();
           //异步请求
           call.enqueue(new Callback() { 
               @Override
               public void onFailure(Call call, final IOException e) { 
                   mHandler.post(new Runnable() { 
                       @Override
                       public void run() { 
                           e.printStackTrace();
                           callBack.failed(e);
                       }
                   });
               }
    
               @Override
               public void onResponse(Call call, final Response response) throws IOException { 
                   final String result;
                   try { 
                       result = response.body().string();
                       mHandler.post(new Runnable() { 
                           @Override
                           public void run() { 
                               callBack.success(result);
                           }
                       });
                   } catch (Throwable e) { 
                       e.printStackTrace();
                       callBack.failed(e);
                   }
               }
           });
    
       }
    
       //下载文件
       @Override
       public void download(String url, final File targetFile, final INetDownloadCallBack downloadCallBack, Object tag) { 
           Request.Builder requestBuilder = new Request.Builder();
           Request request = requestBuilder.url(url).tag(tag).get().build();
           Call call = okHttpClient.newCall(request);
           //同步请求
           // Response response = call.execute();
           //异步请求
           call.enqueue(new Callback() { 
               @Override
               public void onFailure(Call call, IOException e) { 
                   if (call.isCanceled()) {  //任务取消掉后直接return，防止空指针异常
                       return;
                   }
                   e.printStackTrace();
                   downloadCallBack.failed(e);
               }
    
               @Override
               public void onResponse(Call call, Response response) throws IOException { 
                   InputStream is = null;
                   OutputStream os = null;
    
                   try { 
                       is = response.body().byteStream();
                       //总文件大小
                       final long totalSize = response.body().contentLength();
                       if (targetFile != null) { 
                       }
    
                       os = new FileOutputStream(targetFile);
                       byte[] buffer = new byte[1024];
                       int len = 0;
                       //已下载文件大小
                       long downloadSize = 0;
                       //读取网络字节流并写入文件
                       while ((len = is.read(buffer)) != -1) { 
                           os.write(buffer, 0, len);
                           os.flush();
                           downloadSize += len;
                           final long finalDownloadSize = downloadSize;
                           mHandler.post(new Runnable() { 
                               @Override
                               public void run() { 
                                   //乘以1.0f防止小数整除大数为0
                                   downloadCallBack.progress((int) (((finalDownloadSize * 1.0f) / totalSize) * 100))
                                   ;
                               }
                           });
                       }
    
                       //保险起见为文件设置可读可写可执行
                       targetFile.setExecutable(true, false);
                       targetFile.setReadable(true, false);
                       targetFile.setWritable(true, false);
    
                       mHandler.post(new Runnable() { 
                           @Override
                           public void run() { 
                               downloadCallBack.success(targetFile);
                           }
                       });
                   } catch (Exception e) { 
                       if (call.isCanceled()) { //任务取消掉后直接return，防止空指针异常
                           return;
                       }
                       e.printStackTrace();
                       downloadCallBack.failed(e);
                   } finally { 
                       //不要忘了关闭流
                       if (is != null) { 
                           is.close();
                       }
                       if (os != null) { 
                           os.close();
                       }
                   }
               }
           });
       }
    
       //取消下载
       @Override
       public void cancel(Object tag) { 
           List<Call> queuedCalls = okHttpClient.dispatcher().queuedCalls();
           List<Call> runningCalls = okHttpClient.dispatcher().runningCalls();
    
           //取消正在执行中的任务
           if (runningCalls != null) { 
               for (Call call : runningCalls) { 
                   call.cancel();
               }
           }
           //取消排队中的任务
           if (queuedCalls != null) { 
               for (Call call : queuedCalls) { 
                   call.cancel();
               }
           }
       }
    }

#### 2.自定义Dialog ####

1.  在layout下创建`dialog_show_app_info.xml`文件，对ui进行设计

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="400px" android:layout_height="wrap_content" android:orientation="vertical">
    
       <ImageView android:layout_width="400px" android:layout_height="wrap_content" android:scaleType="centerCrop" android:src="@mipmap/robot" />
    
       <LinearLayout android:layout_width="400px" android:layout_height="wrap_content" android:background="@android:color/white" android:orientation="vertical">
    
           <TextView android:id="@+id/tv_title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:layout_marginTop="5px" android:textAlignment="center" android:textColor="@android:color/black" android:textSize="40px" android:textStyle="bold" tools:text="我是标题" />
    
           <TextView android:id="@+id/tv_content" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="20px" android:layout_gravity="center_horizontal" android:textColor="@android:color/black" tools:text="我是内容" />
    
           <Button android:id="@+id/btn_update" android:layout_width="300px" android:layout_height="70px" android:layout_gravity="center" android:layout_marginTop="20px" android:layout_marginBottom="10px" android:background="@drawable/shape_show_app_info_dialog_btn" android:text="升级" android:textColor="@android:color/white"></Button>
       </LinearLayout>
    </LinearLayout>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NDUzMjY2_size_16_color_FFFFFF_t_70 1]

1.  继承`DialogFragment`,在`onCreateView()`中渲染view.

/** * 自定义Dialog */
    public class ShowAppInfoDialog extends DialogFragment { 
    
       public String FILE_SAVE_PATH = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Download/";
       String FILE_NAME = "download.apk";
       public static final String KEY_DOWNLOAD_APP_INFO = "download_app_info";
       public static AppInfo appInfo = null;
       private Handler mHandler = new Handler(Looper.getMainLooper());
       private static final String TAG = "selenium";
    
       @Override
       public void onCreate(@Nullable Bundle savedInstanceState) { 
           super.onCreate(savedInstanceState);
           //获取AppInfo数据
           Bundle arguments = getArguments();
           if (arguments != null) { 
               appInfo = arguments.getParcelable(KEY_DOWNLOAD_APP_INFO);
           }
       }
    
       @Nullable
       @Override
       public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
           View root = inflater.inflate(R.layout.dialog_show_app_info, null);
           TextView title = root.findViewById(R.id.tv_title);
           TextView content = root.findViewById(R.id.tv_content);
           Button updateBtn = root.findViewById(R.id.btn_update);
           title.setText(appInfo.getTitle());
           content.setText(appInfo.getContent());
           bindEvent(updateBtn);
           return root;
       }
    
       @Override
       public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) { 
           super.onViewCreated(view, savedInstanceState);
           getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);
           getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
       }
    
       protected void bindEvent(final Button updateBtn) { 
           updateBtn.setOnClickListener(new View.OnClickListener() { 
               @Override
               public void onClick(View v) { 
                   updateBtn.setEnabled(false);
                   //4.点击下载
                   //先创建文件夹再创建文件
                   File dir = new File(FILE_SAVE_PATH);
                   if (!dir.exists()) { 
                       dir.mkdirs();
                   }
                   File file = new File(dir, FILE_NAME);
                   if (!file.exists()) { 
                       try { 
                           file.createNewFile();
                       } catch (IOException e) { 
                           e.printStackTrace();
                       }
                   }
                   AppUpdater.getInstance().getNetManager().download(appInfo.getUrl(), file, new INetDownloadCallBack() { 
    
                       @Override
                       public void success(File apkFile) { 
                           updateBtn.setEnabled(true);
                           dismiss();
                           //check md5
                           String md5 = AppUtil.getFileMd5(apkFile);
                           Log.i(TAG, "md5: " + md5);
                           if (md5 == null || md5 != appInfo.getMd5()) { 
                               //安装下载程序
                               AppUtil.installApk(getActivity(), apkFile);
                           } else { 
                               mHandler.post(new Runnable() { 
                                   @Override
                                   public void run() { 
                                       Toast.makeText(getActivity(), "下载文件已损坏", Toast.LENGTH_SHORT).show();
                                   }
                               });
                           }
                       }
    
                       @Override
                       public void progress(int progress) { 
                           Log.i(TAG, "progress: " + progress);
                           updateBtn.setText(progress + "%");
                       }
    
                       @Override
                       public void failed(Throwable throwable) { 
                           updateBtn.setEnabled(true);
                           mHandler.post(new Runnable() { 
                               @Override
                               public void run() { 
                                   Toast.makeText(getActivity(), "文件下载失败", Toast.LENGTH_SHORT).show();
                               }
                           });
                       }
                   }, ShowAppInfoDialog.this);
               }
           });
       }
    
       public static void show(FragmentActivity activity, AppInfo appInfo) { 
           Bundle bundle = new Bundle();
           bundle.putParcelable(KEY_DOWNLOAD_APP_INFO, appInfo);
           ShowAppInfoDialog dialog = new ShowAppInfoDialog();
           dialog.setArguments(bundle);
           dialog.show(activity.getSupportFragmentManager(), "showAppInfoDialog");
       }
    
       @Override
       public void onDismiss(DialogInterface dialog) { 
           super.onDismiss(dialog);
           Log.i(TAG, "onDismiss: canceled");
           AppUpdater.getInstance().getNetManager().cancel(ShowAppInfoDialog.this);
       }
    }

#### 3.利用md5对文件做完整性校验 ####

两个文件的md5值相同，可以认为这两个文件完全相同.

1.  获取本地文件的md5值

public static String getFileMd5(File file) { 
           MessageDigest digest = null;
           FileInputStream is = null;
           try { 
               digest = MessageDigest.getInstance("MD5");
               is = new FileInputStream(file);
               byte[] buffer = new byte[1024];
               int len = 0;
               while ((len = is.read(buffer)) != -1) { 
                   digest.update(buffer, 0, len);
               }
               byte[] result = digest.digest();
               //转为16进制
               return new BigInteger(result).toString(16);
           } catch (Exception e) { 
               e.printStackTrace();
               return null;
           } finally { 
               try { 
                   is.close();
               } catch (IOException e) { 
                   e.printStackTrace();
               }
           }
       }

1.  在对比版本时，我们还可以获取本地文件的版本号.

/** * 获取当前应用版本 */
        public static long getVersionCode(Context context) { 
            PackageManager packageManager = null;
            PackageInfo packageInfo = null;
            try { 
                packageManager = context.getPackageManager();
                packageInfo = packageManager.getPackageInfo(context.getPackageName(), 0);
            } catch (PackageManager.NameNotFoundException e) { 
                e.printStackTrace();
            }
            if (packageInfo != null) {  //版本适配
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) { 
                    return packageInfo.getLongVersionCode();
                } else { 
                    return packageInfo.versionCode;
    
                }
            }
            return -1;
        }

#### 4.App应用的安装 ####

通过intent让下载的应用自动安装

/** * 安装应用 * */
        public static void installApk(Activity activity, File apkFile) { 
            Intent intent = new Intent();
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            intent.setAction(Intent.ACTION_VIEW);
            Uri uri = null;
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { 
                uri = FileProvider.getUriForFile(activity, activity.getPackageName() + ".fileprovider", apkFile);
                intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
            } else { 
                uri = Uri.fromFile(apkFile);
            }
            intent.setDataAndType(uri, "application/vnd.android.package-archive");
            activity.startActivity(intent);
        }

### 三、遇到的一些问题及解决办法 ###

1.  存储下载的文件到sd卡报错:[Android存储文件到SD卡中][Android_SD]
2.  网络请求控制台报错:[java.net.UnknownServiceException: CLEARTEXT communication to 59.110.162.30 not permitted by network][java.net.UnknownServiceException_ CLEARTEXT communication to 59.110.162.30 not permitted by network]
3.  网络请求控制台报错:[java.net.SocketException: socket failed: EPERM (Operation not permitted)][java.net.SocketException_ socket failed_ EPERM _Operation not permitted]
4.  安装文件时报错:[android.os.FileUriExposedException: file:///xxxx exposed beyond app through Intent.getData()][android.os.FileUriExposedException_ file_xxxx exposed beyond app through Intent.getData]

### 四、源码 ###

[https://github.com/wantao666/appUpdate][https_github.com_wantao666_appUpdate]

[20200329185922696.gif]: /images/20230528/b7bbd5b17e37445485f99145540d19d0.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NDUzMjY2_size_16_color_FFFFFF_t_70]: /images/20230528/157a0df2f3724a03ab51e0bd2c4f7528.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NDUzMjY2_size_16_color_FFFFFF_t_70 1]: /images/20230528/561e92b01ec4474991f82b8790d18c87.png
[Android_SD]: https://blog.csdn.net/qq_45453266/article/details/105129508
[java.net.UnknownServiceException_ CLEARTEXT communication to 59.110.162.30 not permitted by network]: https://blog.csdn.net/qq_45453266/article/details/105180085
[java.net.SocketException_ socket failed_ EPERM _Operation not permitted]: https://blog.csdn.net/qq_45453266/article/details/105181358
[android.os.FileUriExposedException_ file_xxxx exposed beyond app through Intent.getData]: https://blog.csdn.net/qq_45453266/article/details/105181680
[https_github.com_wantao666_appUpdate]: https://github.com/wantao666/appUpdate