Question

我正在尝试下载文件，下载后想在数据库中更新它，但出于我的意图，服务广播接收器正在创建此问题：

android.app.IntentReceiverLeaked: Service com.dev.newtermain.services.intent_service.DownloadService has leaked IntentReceiver com.dev.newtermain.services.intent_service.DownloadService$DownloadCompleteReceiver@d4fdde9 that was originally registered here. Are you missing a call to unregisterReceiver()?
    at android.app.LoadedApk$ReceiverDispatcher.<init>(LoadedApk.java:969)
    at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:731)
    at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1179)
    at android.app.ContextImpl.registerReceiver(ContextImpl.java:1159)
    at android.app.ContextImpl.registerReceiver(ContextImpl.java:1153)
    at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:554)
    at com.dev.newtermain.services.intent_service.DownloadService.onStartCommand(DownloadService.java:70)
    at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3228)
    at android.app.ActivityThread.-wrap17(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1591)
    at android.os.Handler.dispatchMessage(Handler.java:111)
    at android.os.Looper.loop(Looper.java:207)
    at android.app.ActivityThread.main(ActivityThread.java:5769)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)

这是我的意图服务代码：

public class DownloadService extends IntentService {
 public DownloadService() {
    super("Download Service");
}

Long downloadId;
private DownloadManager downloadManager;

@Override public void onCreate() {
    super.onCreate();
    downloadManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
    completeReceiver = new DownloadCompleteReceiver();
}

@Override public int onStartCommand(@Nullable Intent intent, int flags, int startId) {
    onHandleIntent(intent);
    this.intent = intent;
    return START_STICKY;
}

@Override
protected void onHandleIntent(Intent intent) {

    String key = intent.getStringExtra(DOWNLOAD_KEY);
    messageId = intent.getStringExtra(MESSAGE_ID);
    mReactionId = intent.getStringExtra(REACTION_ID);
    int messageType = intent.getIntExtra(MESSAGE_TYPE, 3);
    initDownload(key, messageType);
}

private void initDownload(String key, int messageType) {
    DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
    request.addRequestHeader("Authorization", SharedPref.User.getToken());

    // In order for this if to run, you must use the Android 3.2 to
    // compile your app
    request.allowScanningByMediaScanner();
    request.setAllowedOverMetered(true);
    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
    request.setDestinationInExternalPublicDir(path, fileName);

    // Get download service and enqueue file
    downloadId = downloadManager.enqueue(request);

    Logs.e("file download", "downloading begin");
    IntentFilter intentFilter = new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE);
    this.registerReceiver(completeReceiver, intentFilter);
}

public class DownloadCompleteReceiver extends BroadcastReceiver {
    public DownloadCompleteReceiver() {
    }

    @Override public void onReceive(Context context, Intent intent) {
        Logs.e("file download", "broadcast received");
        DownloadManager.Query query = new DownloadManager.Query().setFilterById(downloadId);
        Cursor cursor = downloadManager.query(query);
        if (cursor.moveToFirst()) {
            int columnIndex = cursor.getColumnIndex(DownloadManager.COLUMN_STATUS);
            int status = cursor.getInt(columnIndex);
            cursor.close();

            switch (status) {
                case DownloadManager.STATUS_SUCCESSFUL:
                    Logs.e("file download", "download successful");
                    updateDb(fileName, messageId, Id);
                    break;
                case DownloadManager.STATUS_FAILED:
                    Logs.e("file download", "download Fail");
                    break;
                case DownloadManager.STATUS_PENDING:
                    Logs.e("file download", "STATUS_PENDING");
                    break;
                case DownloadManager.STATUS_RUNNING:
                    Logs.e("file download", "STATUS_RUNNING");
                    break;
            }
        }
    }
}

@Override public void onDestroy() {
    Logs.e("file download", "stopping service");
    this.unregisterReceiver(completeReceiver);
    downloadManager.remove(downloadId);
    super.onDestroy();
}

正如广播接收器的文档所建议的那样，我正在取消广播接收器的注册，但是我不明白为什么会出现此问题。

编辑

我已应用所有建议答案的新问题：如果添加广播接收器，它将给出成功响应，但不会保存文件，但是当我成功删除广播接收器文件后，下载

Answer 1

问题：

您面临此问题的原因是，IntentService在下载完成之前运行完毕，并且您的DownloadCompleteReceiver仍在注册。

downloadId = downloadManager.enqueue(request);不能以同步方式下载。结果，IntentService运行完毕。

解决方案

如果必须要具有状态，则可以启动ForegroundService而不是IntentService，然后注册接收器。在服务的onDestory()中，取消注册接收者。

Answer 2

只需通过更改广播注销功能的位置来替换代码

@Override public void onDestroy() {
    downloadManager.remove(downloadId);
    this.unregisterReceiver(completeReceiver);
    super.onDestroy();
}

广播接收器IntentReceiver泄漏

2 个答案: