Android APP更新_後臺下載、自動安裝

之前看了好多博客，拿過來用了用，都不是特別理想
自己手擼一個得了，拿去直接用就OK

public class UpdateService  {
    private DownloadManager mDownloadManager;
    private Context mContext;
    private long downloadId;
    private String apkName;

    public UpdateService() {

    }
    public UpdateService(Context context) {
        mContext = context;
    }

    public void download(String url, String name) {
        final String packageName = "com.android.providers.downloads";
        int state = mContext.getPackageManager().getApplicationEnabledSetting(packageName);
        //檢測下載管理器是否被禁用
        if (state == PackageManager.COMPONENT_ENABLED_STATE_DISABLED
                || state == PackageManager.COMPONENT_ENABLED_STATE_DISABLED_USER
                || state == PackageManager.COMPONENT_ENABLED_STATE_DISABLED_UNTIL_USED) {
            AlertDialog.Builder builder = new AlertDialog.Builder(mContext).setTitle("溫馨提示").setMessage
                    ("系統下載管理器被禁止，需手動打開").setPositiveButton("確定", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                    try {
                        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                        intent.setData(Uri.parse("package:" + packageName));
                        mContext.startActivity(intent);
                    } catch (ActivityNotFoundException e) {
                        Intent intent = new Intent(Settings.ACTION_MANAGE_APPLICATIONS_SETTINGS);
                        mContext.startActivity(intent);
                    }
                }
            }).setNegativeButton("取消", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            });
            builder.create().show();
        } else {
            //正常下載流程
            apkName = name;
            DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
            request.setAllowedOverRoaming(false);

            //通知欄顯示
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
            request.setTitle(AppUtil.getAppName(mContext));
            request.setDescription("正在下載中...");
            request.setVisibleInDownloadsUi(true);

            //設置下載的路徑
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, apkName);

            //獲取DownloadManager
            mDownloadManager = (DownloadManager) mContext.getSystemService(Context.DOWNLOAD_SERVICE);
            downloadId = mDownloadManager.enqueue(request);

            mContext.registerReceiver(mReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
        }
    }

    private BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            checkStatus();
        }
    };

    /**
     * 檢查下載狀態
     */
    private void checkStatus() {
        DownloadManager.Query query = new DownloadManager.Query();
        query.setFilterById(downloadId);
        Cursor cursor = mDownloadManager.query(query);
        if (cursor.moveToFirst()) {
            int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
            switch (status) {
                //下載暫停
                case DownloadManager.STATUS_PAUSED:
                    break;
                //下載延遲
                case DownloadManager.STATUS_PENDING:
                    break;
                //正在下載
                case DownloadManager.STATUS_RUNNING:
                    break;
                //下載完成
                case DownloadManager.STATUS_SUCCESSFUL:
                    installAPK();
                    break;
                //下載失敗
                case DownloadManager.STATUS_FAILED:
                    Toast.makeText(mContext, "下載失敗", Toast.LENGTH_SHORT).show();
                    break;
            }
        }
        cursor.close();
    }

    /**
     * 7.0兼容
     */
    private void installAPK() {
        File apkFile =
                new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), apkName);
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            Uri apkUri = FileProvider.getUriForFile(mContext, mContext.getPackageName() + ".provider", apkFile);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.setDataAndType(apkUri, "application/vnd.android.package-archive");
        } else {
            intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
        }
        mContext.startActivity(intent);
    }

}

版本對比

 /**
     * 版本號比較
     *
     * @param version1
     * @param version2
     * @return
     */
    public static int compareVersion(String version1, String version2) {
        if (version1.equals(version2)) {
            return 0;
        }
        String[] version1Array = version1.split("\\.");
        String[] version2Array = version2.split("\\.");
        Log.d("HomePageActivity", "version1Array=="+version1Array.length);
        Log.d("HomePageActivity", "version2Array=="+version2Array.length);
        int index = 0;
        // 獲取最小長度值
        int minLen = Math.min(version1Array.length, version2Array.length);
        int diff = 0;
        // 循環判斷每位的大小
        Log.d("HomePageActivity", "verTag2=2222="+version1Array[index]);
        while (index < minLen
                && (diff = Integer.parseInt(version1Array[index]) - Integer.parseInt(version2Array[index])) == 0) {
            index++;
        }
        if (diff == 0) {
            // 如果位數不一致，比較多餘位數
            for (int i = index; i < version1Array.length; i++) {
                if (Integer.parseInt(version1Array[i]) > 0) {
                    return 1;
                }
            }

            for (int i = index; i < version2Array.length; i++) {
                if (Integer.parseInt(version2Array[i]) > 0) {
                    return -1;
                }
            }
            return 0;
        } else {
            return diff > 0 ? 1 : -1;
        }
    }

調用：
檢測應用的當前版本號。與服務端最新版本號進行比較。

xie