前言

　　此部落格正在整理中。。。

　　參考：https://www.jianshu.com/p/e0496200769c

程式碼

請求

                DownloadManager downloadManager = (DownloadManager) MainActivity.this.getApplication().getSystemService(Context.DOWNLOAD_SERVICE);
                DownloadManager.Request request = new DownloadManager.Request(Uri.parse("https://dl.hdslb.com/mobile/latest/iBiliPlayer-html5_app_bili.apk"));
                request.setDestinationInExternalPublicDir(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getPath(), 
 
"iBiliPlayer-html5_app_bili.apk");
                request.setTitle("測試下載");//設定標題
                request.setDescription("下載中");//設定描述
                request.addRequestHeader("token","11");//新增頭 key： value
                request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI);//
 
設定網路型別
                request.setVisibleInDownloadsUi(false);//是否顯示下載 從Android Q開始會被忽略
//                request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);//僅在下載中時顯示在通知中,完成後會自動隱藏
                request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);//
 
下載中與下載完成後都會在通知中顯示
                id = downloadManager.enqueue(request);//加入佇列，會返回一個唯一下載id

查詢

private void queryFileName(long id){
        DownloadManager downloadManager = (DownloadManager) MainActivity.this.getApplication().getSystemService(Context.DOWNLOAD_SERVICE);
        DownloadManager.Query query = new DownloadManager.Query();
        query.setFilterById(id);
        Cursor cursor = downloadManager.query(query);
        if (cursor.moveToFirst()) {
            String file = cursor.getString(cursor.getColumnIndexOrThrow(DownloadManager.COLUMN_LOCAL_URI));
            Log.e("除錯_臨時_log", "this_" + file);
        }
    }

監聽

                AppDownReceiver appDownReceiver = new AppDownReceiver();
                registerReceiver(appDownReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));

class AppDownReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        long completeDownloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
        Log.e("除錯_臨時_log", "this_ id = " + completeDownloadId);
        DownloadManager downloadManager = (DownloadManager) context.getApplicationContext().getSystemService(Context.DOWNLOAD_SERVICE);
        Uri uri = downloadManager.getUriForDownloadedFile(completeDownloadId);
        installApk(context, uri);

    }

    private void installApk(Context context, Uri uri) {
        Intent intent = new Intent(Intent.ACTION_VIEW);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.setDataAndType(uri, "application/vnd.android.package-archive");
        } else {
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            intent.setDataAndType(uri, "application/vnd.android.package-archive");

        }
        context.startActivity(intent);
    }
}