Java 将数据从服务发送到活动
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Sending data from service to activity
提问by Sam97305421562
I am having issue when sending data from Service to Activity through Notification , I click a Notification an Activity get invoked but when i try to add some parameters through bundle i am not able to get the parameters in that called intent , I have gone through the link How to send parameters from a notification-click to an activity?
我在通过通知将数据从 Service 发送到 Activity 时遇到问题，我单击了一个通知，一个 Activity 被调用，但是当我尝试通过 bundle 添加一些参数时，我无法在该调用的意图中获取参数，我已经完成了链接 如何将参数从通知点击发送到活动？
But still no luck.
但仍然没有运气。
Has the same issue occurred with somebody else ?
其他人是否也出现过同样的问题？
Thanks in advance.
提前致谢。
采纳答案by Niko Gamulin
You have to modify the Manifest file as well.
您还必须修改 Manifest 文件。
Here is the example that works:
这是有效的示例：
These variables and methods are members of Service class:
这些变量和方法是 Service 类的成员：
public static final String MOVEMENT_UPDATE = "com.client.gaitlink.AccelerationService.action.MOVEMENT_UPDATE";
public static final String ACCELERATION_X = "com.client.gaitlink.AccelerationService.ACCELERATION_X";
public static final String ACCELERATION_Y = "com.client.gaitlink.AccelerationService.ACCELERATION_Y";
public static final String ACCELERATION_Z = "com.client.gaitlink.AccelerationService.ACCELERATION_Z";
private void announceAccelerationChanges()//this method sends broadcast messages
{
Intent intent = new Intent(MOVEMENT_UPDATE);
intent.putExtra(ACCELERATION_X, accelerationX);
intent.putExtra(ACCELERATION_Y, accelerationY);
intent.putExtra(ACCELERATION_Z, accelerationZ);
sendBroadcast(intent);
}
And this are the methods from Main activity:
这是来自主要活动的方法：
You have to register receiver in the onResume method:
您必须在 onResume 方法中注册接收器：
@Override
public void onResume()
{
IntentFilter movementFilter;
movementFilter = new IntentFilter(AccelerationService.MOVEMENT_UPDATE);
accelerationReceiver = new AccelerationServiceReceiver();
registerReceiver(accelerationReceiver, movementFilter);
startAccelerationService();
super.onResume();
}
private void startAccelerationService()
{
startService(new Intent(this, AccelerationService.class));
}
public class AccelerationServiceReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent)//this method receives broadcast messages. Be sure to modify AndroidManifest.xml file in order to enable message receiving
{
accelerationX = intent.getDoubleExtra(AccelerationService.ACCELERATION_X, 0);
accelerationY = intent.getDoubleExtra(AccelerationService.ACCELERATION_Y, 0);
accelerationZ = intent.getDoubleExtra(AccelerationService.ACCELERATION_Z, 0);
announceSession();
updateGUI();
}
}
This is the part of AndroidManifest.xml file that has to be set in order to receive broadcast messages:
这是 AndroidManifest.xml 文件的一部分，必须设置以接收广播消息：
<activity android:name=".GaitLink"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<action android:name="com.client.gaitlink.CommunicationService.action.ACTIVITY_STATUS_UPDATE" />
</intent-filter>
</activity>
