我正在使用Cordova构建应用程序,现在我专注于后台服务。我需要为Notifcations服务并定期更新它们,这已经很好用了。当用户点击通知时,它应该打开应用程序,就像使用Spotify一样。现在有一个独立的应用程序,我通常会这样做:
Intent intent = new Intent(this, MyActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
PendingIntent contentIntent = PendingIntent.getActivity(this,0,
intent, Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, myChannelID)
.setContentIntent(contentIntent);
然后构建通知等。问题是,我无法从服务中访问Cordova Activity。我尝试过这样的事情:
Intent intent = new Intent(this, MyPlugin.class);
但由于插件没有扩展活动(它扩展了CordovaPlugin),这似乎不起作用。我可以从插件中访问活动,但我似乎无法将活动传递给服务。任何帮助,将不胜感激 :)。
您可以将插件实例公开为公共类属性,从而从中访问Cordova Activity:
public class MyPlugin extends CordovaPlugin{
public static MyPlugin instance = null;
static CordovaWebView cordovaWebView;
static CordovaInterface cordovaInterface;
@Override
public void initialize(CordovaInterface cordova, CordovaWebView webView) {
super.initialize(cordova, webView);
instance = this;
cordovaWebView = webView;
cordovaInterface = cordova;
}
@Override
public void onDestroy() {
instance = null;
}
}
然后您的服务可以通过该公共静态属性引用它,如下所示:
public class MyService {
public static void myMethod(){
if(MyPlugin.instance != null){
Activity cordovaActivity = MyPlugin.instance.cordovaInterface.getActivity();
Context applicationContext = cordovaActivity.getApplicationContext();
Intent intent = new Intent(applicationContext, cordovaActivity.getClass());
intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
PendingIntent contentIntent = PendingIntent.getActivity(applicationContext,0, intent, Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(applicationContext, myChannelID).setContentIntent(contentIntent);
}
}
}
请务必将<param name="onload" value="true" />
添加到<feature>
中的plugin.xml
定义中,以确保在app启动时调用initialize()
(请参阅Plugin Initialization and Lifetime):
<feature name="MyPlugin">
<param name="android-package" value="cordova.plugin.MyPlugin" />
<param name="onload" value="true" />
</feature>