在应用中更新App版本
jopen
9年前
<blockquote> <p>欢迎Follow我的<a href="/misc/goto?guid=4959652813041333444" target="_blank">GitHub</a>, 关注我的<a href="/misc/goto?guid=4959652813131126148" target="_blank">简书</a>.</p> </blockquote> <p>在应用中, 为了提高用户体验, 会提供更新版本的功能. 那么如何实现呢? 我写了一个简单的Demo, 说明一下, 需要注意几个细节. 使用了Retrofit和Rx处理网络请求.</p> <p>Github<a href="/misc/goto?guid=4959652813209103367" target="_blank">下载地址</a></p> <div class="image-package" href="https://simg.open-open.com/show/bef33667ddb6b01419222a103e8ba887.png"> <img src="https://simg.open-open.com/show/bef33667ddb6b01419222a103e8ba887.png" width="700" height="550.2777777777777" data-original-src="https://simg.open-open.com/show/807837f2091a3d4a52b647cf71ad51a2.png" /> <br /> <div class="image-caption"> 更新 </div> </div> <h1>1. 逻辑</h1> <p>访问服务器, 根据是否包含新版本, 判断是否需要更新.<br /> 下载Apk, 下载完成后, 自动安装, 高版本会覆盖低版本.</p> <p>逻辑:</p> <pre class="brush:java; toolbar: true; auto-links: false;">public class MainActivity extends AppCompatActivity { private static final String APP_NAME = "Ped_android"; private static final String VERSION = "1.0.0"; private static final String INFO_NAME = "计步器"; private static final String STORE_APK = "chunyu_apk"; @Bind(R.id.main_b_install_apk) Button mBInstallApk; private UpdateAppUtils.UpdateCallback mUpdateCallback; // 更新回调 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ButterKnife.bind(this); mUpdateCallback = new UpdateAppUtils.UpdateCallback() { @Override public void onSuccess(UpdateInfo updateInfo) { Toast.makeText(MainActivity.this, "有更新", Toast.LENGTH_SHORT).show(); UpdateAppUtils.downloadApk(MainActivity.this, updateInfo, INFO_NAME, STORE_APK); } @Override public void onError() { Toast.makeText(MainActivity.this, "无更新", Toast.LENGTH_SHORT).show(); } }; mBInstallApk.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { UpdateAppUtils.checkUpdate(APP_NAME, VERSION, mUpdateCallback); } }); } }</pre> <p><code>UpdateAppUtils</code>是核心下载类. 输入App的代号, 版本号, 异步回调, 发送到服务器, 判断是否需要更新. 如果存在新版本, 则下载Apk, 并自动安装更新. </p> <h1>2. 网络请求</h1> <p>更新请求, 参数是App代号和当前版本号.</p> <pre class="brush:java; toolbar: true; auto-links: false;">/** * 更新服务 * <p> * Created by wangchenlong on 16/1/4. */ public interface UpdateService { String ENDPOINT = "http://www.chunyuyisheng.com"; // 获取个人信息 @GET("/cmsapi/app/update") Observable<UpdateInfo> getUpdateInfo( @Query("appName") String appName, @Query("version") String version); }</pre> <p>创建服务的工厂类.</p> <pre class="brush:java; toolbar: true; auto-links: false;">/** * 创建Retrofit服务 * <p> * Created by wangchenlong on 16/1/4. */ public class ServiceFactory { public static <T> T createServiceFrom(final Class<T> serviceClass, String endpoint) { Retrofit adapter = new Retrofit.Builder() .baseUrl(endpoint) .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) // 添加Rx适配器 .addConverterFactory(GsonConverterFactory.create()) // 添加Gson转换器 .build(); return adapter.create(serviceClass); } }</pre> <p>更新信息的Json类.</p> <pre class="brush:java; toolbar: true; auto-links: false;">/** * 更新信息(JSON) * <p> * Created by wangchenlong on 16/1/4. */ public class UpdateInfo { public Data data; // 信息 public Integer error_code; // 错误代码 public String error_msg; // 错误信息 public static class Data { public String curVersion; // 当前版本 public String appURL; // 下载地址 public String description; // 描述 public String minVersion; // 最低版本 public String appName; // 应用名称 } @Override public String toString() { return "当前版本: " + data.curVersion + ", 下载地址: " + data.appURL + ", 描述信息: " + data.description + ", 最低版本: " + data.minVersion + ", 应用代称: " + data.appName + ", 错误代码: " + error_code + ", 错误信息: " + error_msg; } }</pre> <h1>3. 请求和下载</h1> <p>更新库的主类, 包含<code>检查更新(checkUpdate)</code>和<code>下载Apk(downloadApk)</code>两个重要方法.</p> <pre class="brush:java; toolbar: true; auto-links: false;">/** * 更新管理器 * <p> * Created by wangchenlong on 16/1/6. */ @SuppressWarnings("unused") public class UpdateAppUtils { @SuppressWarnings("unused") private static final String TAG = "DEBUG-WCL: " + UpdateAppUtils.class.getSimpleName(); /** * 检查更新 */ @SuppressWarnings("unused") public static void checkUpdate(String appCode, String curVersion, UpdateCallback updateCallback) { UpdateService updateService = ServiceFactory.createServiceFrom(UpdateService.class, UpdateService.ENDPOINT); updateService.getUpdateInfo(appCode, curVersion) .subscribeOn(Schedulers.newThread()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(updateInfo -> onNext(updateInfo, updateCallback), throwable -> onError(throwable, updateCallback)); } // 显示信息 private static void onNext(UpdateInfo updateInfo, UpdateCallback updateCallback) { Log.e(TAG, "返回数据: " + updateInfo.toString()); if (updateInfo.error_code != 0 || updateInfo.data == null || updateInfo.data.appURL == null) { updateCallback.onError(); // 失败 } else { updateCallback.onSuccess(updateInfo); } } // 错误信息 private static void onError(Throwable throwable, UpdateCallback updateCallback) { updateCallback.onError(); } /** * 下载Apk, 并设置Apk地址, * 默认位置: /storage/sdcard0/Download * * @param context 上下文 * @param updateInfo 更新信息 * @param infoName 通知名称 * @param storeApk 存储的Apk */ @SuppressWarnings("unused") public static void downloadApk( Context context, UpdateInfo updateInfo, String infoName, String storeApk ) { if (!isDownloadManagerAvailable()) { return; } String description = updateInfo.data.description; String appUrl = updateInfo.data.appURL; if (appUrl == null || appUrl.isEmpty()) { Log.e(TAG, "请填写\"App下载地址\""); return; } appUrl = appUrl.trim(); // 去掉首尾空格 if (!appUrl.startsWith("http")) { appUrl = "http://" + appUrl; // 添加Http信息 } Log.e(TAG, "appUrl: " + appUrl); DownloadManager.Request request; try { request = new DownloadManager.Request(Uri.parse(appUrl)); } catch (Exception e) { e.printStackTrace(); return; } request.setTitle(infoName); request.setDescription(description); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { request.allowScanningByMediaScanner(); request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); } request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, storeApk); Context appContext = context.getApplicationContext(); DownloadManager manager = (DownloadManager) appContext.getSystemService(Context.DOWNLOAD_SERVICE); // 存储下载Key SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(appContext); sp.edit().putLong(PrefsConsts.DOWNLOAD_APK_ID_PREFS, manager.enqueue(request)).apply(); } // 最小版本号大于9 private static boolean isDownloadManagerAvailable() { return Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD; } // 错误回调 public interface UpdateCallback { void onSuccess(UpdateInfo updateInfo); void onError(); } }</pre> <p>检查更新: 创建服务, 在新线程中发送请求, 在主线程中接收数据, 判断成功和失败.</p> <pre class="brush:java; toolbar: true; auto-links: false;"> /** * 检查更新 */ @SuppressWarnings("unused") public static void checkUpdate(String appCode, String curVersion, UpdateCallback updateCallback) { UpdateService updateService = ServiceFactory.createServiceFrom(UpdateService.class, UpdateService.ENDPOINT); updateService.getUpdateInfo(appCode, curVersion) .subscribeOn(Schedulers.newThread()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(updateInfo -> onNext(updateInfo, updateCallback), throwable -> onError(throwable, updateCallback)); }</pre> <p>下载Apk: 转换和解析Url, 设置通知信息和存储位置, 存储下载Id, 自动安装更新.</p> <pre class="brush:java; toolbar: true; auto-links: false;"> /** * 下载Apk, 并设置Apk地址, * 默认位置: /storage/sdcard0/Download * * @param context 上下文 * @param updateInfo 更新信息 * @param infoName 通知名称 * @param storeApk 存储的Apk */ @SuppressWarnings("unused") public static void downloadApk( Context context, UpdateInfo updateInfo, String infoName, String storeApk ) { if (!isDownloadManagerAvailable()) { return; } String description = updateInfo.data.description; String appUrl = updateInfo.data.appURL; if (appUrl == null || appUrl.isEmpty()) { Log.e(TAG, "请填写\"App下载地址\""); return; } appUrl = appUrl.trim(); // 去掉首尾空格 if (!appUrl.startsWith("http")) { appUrl = "http://" + appUrl; // 添加Http信息 } Log.e(TAG, "appUrl: " + appUrl); DownloadManager.Request request; try { request = new DownloadManager.Request(Uri.parse(appUrl)); } catch (Exception e) { e.printStackTrace(); return; } request.setTitle(infoName); request.setDescription(description); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { request.allowScanningByMediaScanner(); request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); } request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, storeApk); Context appContext = context.getApplicationContext(); DownloadManager manager = (DownloadManager) appContext.getSystemService(Context.DOWNLOAD_SERVICE); // 存储下载Key SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(appContext); sp.edit().putLong(PrefsConsts.DOWNLOAD_APK_ID_PREFS, manager.enqueue(request)).apply(); }</pre> <blockquote> <p>使用<code>DownloadManager</code>下载文件是Android的推荐方式.<br /> 存储<code>下载Id(manager.enqueue(request))</code>是为了在安装应用时, 找到Apk.<br /> 默认存储地址<code>/storage/sdcard0/Download</code>.</p> </blockquote> <h1>4.自动安装</h1> <p>注册广播接收器, 接收消息<code>ACTION_DOWNLOAD_COMPLETE</code>, 下载完成会发送广播. 获取下载文件的Uri, 进行匹配, 发送安装消息, 自动安装.</p> <pre class="brush:java; toolbar: true; auto-links: false;">/** * 安装下载接收器 * <p> * Created by wangchenlong on 16/1/5. */ public class InstallReceiver extends BroadcastReceiver { private static final String TAG = "DEBUG-WCL: " + InstallReceiver.class.getSimpleName(); // 安装下载接收器 @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(DownloadManager.ACTION_DOWNLOAD_COMPLETE)) { long downloadApkId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1); installApk(context, downloadApkId); } } // 安装Apk private void installApk(Context context, long downloadApkId) { // 获取存储ID SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context); long id = sp.getLong(PrefsConsts.DOWNLOAD_APK_ID_PREFS, -1L); if (downloadApkId == id) { DownloadManager dManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE); Intent install = new Intent(Intent.ACTION_VIEW); Uri downloadFileUri = dManager.getUriForDownloadedFile(downloadApkId); if (downloadFileUri != null) { install.setDataAndType(downloadFileUri, "application/vnd.android.package-archive"); install.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(install); } else { Log.e(TAG, "下载失败"); } } } }</pre> <blockquote> <p>安装本应用下载的Apk, 不安装其他Apk, 存储下载Id, 与广播Id进行匹配.<br /> 下载失败, 也会发送<code>下载完成(ACTION_DOWNLOAD_COMPLETE)</code>广播, Uri可能为空, 需要判断, 否则发生崩溃.</p> </blockquote> <p>OK, that's all! Enjoy It!</p> <p>来自： <a href="/misc/goto?guid=4959652813293124879" rel="nofollow" target="_blank">http://www.jianshu.com/p/5a6501a934cb</a></p>