• 在应用中更新App版本

    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.

    Github下载地址

    更新

    1. 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:

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    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.

    2. 网络请求

    更新请求, 参数是App代号和当前版本号.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    /**
     * 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&lt;UpdateInfo&gt; getUpdateInfo(
                @Query("appName") String appName,
                @Query("version") String version);
    }

    创建服务的工厂类.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    /**
     * 创建Retrofit服务
     * <p>
     * Created by wangchenlong on 16/1/4.
     */
    public class ServiceFactory {
        public static &lt;T&gt; T createServiceFrom(final Class&lt;T&gt; 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Json类.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    /**
     * 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;
        }
    }

    3. 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.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    72
    73
    74
    75
    76
    77
    78
    79
    80
    81
    82
    83
    84
    85
    86
    87
    88
    89
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    /**
     * 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 -&gt; onNext(updateInfo, updateCallback),
                            throwable -&gt; 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 &gt;= 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 &gt;= 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.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    /**
      * 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 -&gt; onNext(updateInfo, updateCallback),
                         throwable -&gt; 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.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    /**
     * 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 &gt;= 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.

    4.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.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    /**
     * 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.

    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.

    Github下载地址

    更新

    1. 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:

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    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.

    2. 网络请求

    更新请求, 参数是App代号和当前版本号.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    /**
     * 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&lt;UpdateInfo&gt; getUpdateInfo(
                @Query("appName") String appName,
                @Query("version") String version);
    }

    创建服务的工厂类.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    /**
     * 创建Retrofit服务
     * <p>
     * Created by wangchenlong on 16/1/4.
     */
    public class ServiceFactory {
        public static &lt;T&gt; T createServiceFrom(final Class&lt;T&gt; 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Json类.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    /**
     * 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;
        }
    }

    3. 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.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    72
    73
    74
    75
    76
    77
    78
    79
    80
    81
    82
    83
    84
    85
    86
    87
    88
    89
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    /**
     * 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 -&gt; onNext(updateInfo, updateCallback),
                            throwable -&gt; 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 &gt;= 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 &gt;= 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.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    /**
      * 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 -&gt; onNext(updateInfo, updateCallback),
                         throwable -&gt; 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.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    /**
     * 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 &gt;= 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.

    4.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.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    /**
     * 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.
  • 相关阅读:
    WPF 关于拖拽打开文件的注意事项
    asp.net core 3.1中对Mongodb BsonDocument的序列化和反序列化支持
    用百度webuploader分片上传大文件
    多线程学习笔记
    web.config数据库连接字符串加密
    Visual Studio 2010 常用快捷方式
    Team Foundation Server 2013 日常使用使用手册（四）分支与合并
    Team Foundation Server 2013 日常使用使用手册（三）上传新工程、创建任务、创建bug、设置预警
    Team Foundation Server 2013 日常使用使用手册（二）修改、签入、撤销、回滚、对比代码变更
    Team Foundation Server 2013 日常使用使用手册（一）-本地连接TFS、查看任务
  • 原文地址：https://www.cnblogs.com/qianyukun/p/5193501.html
Copyright © 2020-2023  润新知