工具-下载并安装Apk

下载并安装apk

/**
 * 1.从服务器下载apk
 * 
 * @param path
 * @param pd
 */
public static File getFileFromServer(String path, @NonNull ProgressDialog pd) throws Exception{
    // 如果相等的话表示当前的sdcard挂载在手机上并且是可用的
        HttpURLConnection conn;
        
        if(path.indexOf("https") != -1){//独立打包的地址为https，因此需要用Https方式下载
            int lastIndex = path.lastIndexOf("/");
            if(lastIndex == -1){
                File file = new File(pd.getContext().getExternalCacheDir(), "updata.apk");
                 return file;
            }

            String preScheme = path.substring(0, lastIndex);
            String name = path.substring(lastIndex, path.length());
            URL url = new URL(preScheme + URLEncoder.encode(name,"UTF-8"));//独立打包的包名时utf-8的

            TrustHttpsHostHelper.trustAllHosts();
            conn = (HttpsURLConnection)url.openConnection();
            TrustHttpsHostHelper.setHostVerifier((HttpsURLConnection) conn);
            conn.connect();
        }else{
            URL url = new URL(path);
            conn = (HttpURLConnection) url.openConnection();
        }

        conn.setConnectTimeout(5000);

        // 获取到文件的大小
        int fileSize = conn.getContentLength();
        int newFileSize = FormetFileSize(fileSize);
        pd.setMax(newFileSize);

        InputStream is = conn.getInputStream();

        File file = new File(pd.getContext().getExternalCacheDir(), "updata.apk");

        FileOutputStream fos = new FileOutputStream(file);
        BufferedInputStream bis = new BufferedInputStream(is);
        byte[] buffer = new byte[1024];
        int len;
        int total = 0;
        while ((len = bis.read(buffer)) != -1){
            fos.write(buffer, 0, len);
            total += len;
            // 获取当前已下载量
            int newTotal = FormetFileSize(total);
            pd.setProgress(newTotal);
            pd.setProgressNumberFormat(newTotal + " kb/" + newFileSize + " kb");
        }
        fos.close();
        bis.close();
        is.close();
        return file;
}

注意：这一段中URL url = new URL(preScheme + URLEncoder.encode(name,"UTF-8"));//独立打包的包名时utf-8的（其中 name 是带一个斜杆的，比如”/byldy_1.1.2.apk”）会把最后一个”/“转成”%2F”，而这会有个问题：七牛的链接比如https://qiniudownload.byjxj.com%2Fbyldy_1.1.2.apk放到浏览器上也无法下载；而https://qiniudownload.byjxj.com/20191219%2Fbyldy_1.1.3.apk就可以下载；目前还无法确定是不是七牛的问题。

//下载并安装
public void downLoadApk(final UpdataInfoModel info) {
    if (info == null) {
        return;
    }

    final ProgressDialog pd; // 进度条对话框
    pd = new ProgressDialog(activity);
    pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
    pd.setMessage("正在下载更新");
    pd.setCanceledOnTouchOutside(false);// 设置点击屏幕Dialog不消失
    pd.show();
    new Thread() {
        @Override
        public void run() {
            try {
                File file = DownLoadManager.getFileFromServer(info.getUpdateUrl(), pd);
                sleep(3000);
                installApk(file);
                pd.dismiss(); // 结束掉进度条对话框
            } catch (Exception e) {
                e.printStackTrace();

                // 下载apk失败
                ToastUtil.showToastLong(activity.getApplicationContext(), "下载新版本失败");
                if (!info.isForceUpdate() && versionUpdateListener != null) {
                    //后台设置非强制升级，又更新失败，那么直接进入下一步
                    versionUpdateListener.onNormal(false);
                }
            }
        }
    }.start();
}

// 安装apk
private void installApk(File file) {
    Intent intent = new Intent(Intent.ACTION_VIEW);
//判断是否是AndroidN以及更高的版本
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        Uri contentUri = FileProvider.getUriForFile(activity, BuildConfig.APPLICATION_ID + ".updateProvider", file);
        intent.setDataAndType(contentUri, "application/vnd.android.package-archive");
        //这个要加 return，否则可能会出现安装完毕点返回又到安装页面的问题
        return;
    } else {
        intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    }

    activity.startActivityForResult(intent, 999, false);
}