Question

我想向活动和服务发送一个parcelable对象。为了发送给我，我使用：

public void onClick(View view) {
    Intent intent = new Intent(mContext, MainActivity.class);
    Intent i = new Intent(mContext, OverlayService.class);
    intent.putExtra(ITEM_KEY, item);
    i.putExtra(ITEM_KEY, item);
    mContext.startActivity(intent);
}

然后在我的活动中接收：

DataItem item = getIntent().getExtras().getParcelable(DataItemAdapter.ITEM_KEY);
    if (item == null) {
        throw new AssertionError("Null data item received!");
    }

这完美无缺。但是对于我的服务，我使用：

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    DataItem item = intent.getExtras().getParcelable(DataItemAdapter.ITEM_KEY);
    if (item == null) {
        throw new AssertionError("Null data item received!");
    }else{
        Toast.makeText(this, "Item received", Toast.LENGTH_SHORT).show();
    }
    return START_STICKY;
}

结果是一个nullpointer异常：

Unable to start service com.madhatter.nat.test.OverlayService@7aae5dd with Intent { cmp=com.madhatter.nat.test/.OverlayService }: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Parcelable android.os.Bundle.getParcelable(java.lang.String)' on a null object reference
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3314)
at android.app.ActivityThread.-wrap21(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1565)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Parcelable android.os.Bundle.getParcelable(java.lang.String)' on a null object reference
at com.madhatter.nat.test.OverlayService.onStartCommand(OverlayService.java:46)
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3297)
at android.app.ActivityThread.-wrap21(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1565) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6077) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

以下是我用来启动服务的代码：

public void show(View view) {
    checkPermissionOverlay();
    Intent svc = new Intent(this, OverlayService.class);
    startService(svc);
    notificationService();
}

任何想法我做错了什么？谢谢你的帮助。

Answer 1

您需要以与开始活动相同的方式将额外内容包含在用于启动服务的意图中。

public void show(View view) {
    checkPermissionOverlay();
    Intent svc = new Intent(this, OverlayService.class);
    svc.putExtra(DataItemAdapter.ITEM_KEY, dataItem);
    startService(svc);
    notificationService();
}

Android parcelable对象传递给活动但不传递给服务

1 个答案: