Retrofit实现App更新

Github代码：https://github.com/SpikeKing/wcl-update-request-demo

逻辑

访问服务器, 根据是否包含新版本, 判断是否需要更新.
下载Apk, 下载完成后, 自动安装, 高版本会覆盖低版本.

逻辑:

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);            }        });    }}

UpdateAppUtils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.

网络请求

更新请求, 参数是App代号和当前版本号.

/** * 更新服务 * <p> * Created by wangchenlong on 16/1/4. */public interface UpdateService {    String ENDPOINT = "http://www.chunyuyisheng.com";    // 获取App版本信息    @GET("/cmsapi/app/update")    Observable<UpdateInfo> getUpdateInfo(            @Query("appName") String appName,            @Query("version") String version);}

创建服务的工厂类.

/** * 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);    }}

更新信息的实体类.

/** * 更新信息 * <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;    }}

请求和下载

更新库的主类, 包含检查更新(checkUpdate)和下载Apk(downloadApk)两个重要方法.

/** * 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();    }}

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.

/**     * 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));    }

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.

/**     * 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();    }

使用DownloadManager下载文件是Android的推荐方式.
存储下载Id(manager.enqueue(request))是为了在安装应用时, 找到Apk.
默认存储地址/storage/sdcard0/Download.

自动安装

注册广播接收器, 接收消息ACTION_DOWNLOAD_COMPLETE, 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.

/** * 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");            }        }    }}

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.
下载失败, 也会发送下载完成(ACTION_DOWNLOAD_COMPLETE)广播, Uri可能为空, 需要判断, 否则发生崩溃.

Github下载地址
转自：http://blog.csdn.net//caroline_wendy/article/details/50475854