Question

我正在研究如何在任何应用程序中发生任何下载时触发我的应用程序。我有使用DownloadManager的代码片段，只有当我的应用程序执行了任何下载时才会通知我，但是我从来没有找到任何解决方案，在我的手机中发生任何下载，必须通知我的应用程序。 Pl建议我是否可以这样做。谢谢

Answer 1

1-您必须在后台下载任何文件Service。

    public class DownloadService extends Service {

    private static final String TAG = "DownloadService";
    public static final int UPDATE_PROGRESS = 8344;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        if (intent == null) {
        } else {

            final String urlToDownload = intent.getStringExtra("url");
            final ResultReceiver receiver = (ResultReceiver) intent
                    .getParcelableExtra("receiver");

            new Thread(new Runnable() {

                @Override
                public void run() {
                    try {
                        URL url = new URL(urlToDownload);
                        URLConnection connection = url.openConnection();
                        connection.connect();

                        int fileLength = connection.getContentLength();

                        // download the file
                        InputStream input = new BufferedInputStream(url
                                .openStream());
                        String localPath = Environment
                                .getExternalStorageDirectory()
                                .getAbsoluteFile()
                                + File.separator
                                + Constant.ROOT_FOLDER_NAME
                                + File.separator
                                + Constant.FOLDER_IMAGE
                                + File.separator
                                + urlToDownload.substring(urlToDownload
                                        .lastIndexOf('/') + 1);

                        AppLog.Log(TAG, "Path :: " + localPath);

                        OutputStream output = new FileOutputStream(localPath);

                        byte data[] = new byte[1024];
                        long total = 0;
                        int count;
                        while ((count = input.read(data)) != -1) {
                            total += count;
                            // publishing the progress....
                            Bundle resultData = new Bundle();
                            resultData.putInt("progress",
                                    (int) (total * 100 / fileLength));
                            receiver.send(UPDATE_PROGRESS, resultData);
                            output.write(data, 0, count);
                        }

                        output.flush();
                        output.close();
                        input.close();
                    } catch (IOException e) {
                        AppLog.Log(TAG, "********* EXCEPTION *****");
                        e.printStackTrace();
                    }

                    Bundle resultData = new Bundle();
                    resultData.putInt("progress", 100);
                    receiver.send(UPDATE_PROGRESS, resultData);
                    stopSelf();
                }
            }).start();
        }

        return START_STICKY;
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

2-然后你必须让ResultReceiver在下载完成时获得通知。

private class DownloadReceiver extends ResultReceiver {

    public DownloadReceiver(Handler handler) {
        super(handler);
    }

    @Override
    protected void onReceiveResult(int resultCode, Bundle resultData) {
        super.onReceiveResult(resultCode, resultData);
        if (resultCode == DownloadService.UPDATE_PROGRESS) {
            int progress = resultData.getInt("progress");

            if (progress == 100) {
                // Download Complete
            }
        }
    }
}

3-致电下载服务

Intent intent = new Intent(context, DownloadService.class);
intent.putExtra("url", "url to download");
intent.putExtra("receiver", new DownloadReceiver(new Handler()));
startService(intent);

Manifest.xml中的更改

在应用程序标记内的清单文件中添加标记：

<application >
------
------

<service android:name="PACKAGENAME.DownloadService" />

------
------
</application>

接收器下载 - Android

1 个答案: