OneSignal Android NotificationOpenedHandler – 启动活动

尝试从Parse迁移到OneSignal，我坚持在用户点击推送通知后如何启动新的Activity。 我的处理程序正在运行，日志显示文本，问题似乎是如何从我的推送打开处理程序中获取对应用程序上下文的访问权限。 示例代码含糊不清，如果没有getApplicationContext()其他事情， getApplicationContext()就无法工作。

我发现的一篇与OneSignal无关的post建议扩展Application类以获取对应用程序上下文的访问权限。 这没有产生任何语法错误，但我的应用程序崩溃。

码：

 package com.linkedresponder.onesignal; import android.app.Activity; import android.app.Application; import android.content.Context; import android.content.Intent; import android.util.Log; import android.widget.Toast; import com.onesignal.OSNotificationAction; import com.onesignal.OSNotificationOpenResult; import com.onesignal.OneSignal; import org.json.JSONObject; class NotificationOpenHandler extends Application implements OneSignal.NotificationOpenedHandler { // This fires when a notification is opened by tapping on it. private Context mContext; @Override public void onCreate() { this.mContext = getApplicationContext(); } @Override public void notificationOpened(OSNotificationOpenResult result) { OSNotificationAction.ActionType actionType = result.action.type; JSONObject data = result.notification.payload.additionalData; String customKey; if (data != null) { customKey = data.optString("customkey", null); if (customKey != null) { Log.i("OneSignalExample", "customkey set with value: " + customKey); } else { Log.i("OneSignalExample", "No data"); } } if (actionType == OSNotificationAction.ActionType.ActionTaken) Log.i("OneSignalExample", "Button pressed with id: " + result.action.actionID); Intent intent = new Intent(mContext, PushClicked.class); intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT | Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); } } 

错误：

 er.onesignal E/AndroidRuntime: FATAL EXCEPTION: main Process: com.linkedresponder.onesignal, PID: 5680 java.lang.RuntimeException: Unable to start receiver com.onesignal.NotificationOpenedReceiver: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Context.getPackageName()' on a null object reference at android.app.ActivityThread.handleReceiver(ActivityThread.java:3018) at android.app.ActivityThread.-wrap18(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1544) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$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 'java.lang.String android.content.Context.getPackageName()' on a null object reference at android.content.ComponentName.(ComponentName.java:128) at android.content.Intent.(Intent.java:4868) at com.linkedresponder.onesignal.NotificationOpenHandler.notificationOpened(NotificationOpenHandler.java:41) at com.onesignal.OneSignal.fireNotificationOpenedHandler(OneSignal.java:1009) at com.onesignal.OneSignal.runNotificationOpenedCallback(OneSignal.java:954) at com.onesignal.OneSignal.handleNotificationOpen(OneSignal.java:1041) at com.onesignal.NotificationOpenedProcessor.processIntent(NotificationOpenedProcessor.java:101) at com.onesignal.NotificationOpenedProcessor.processFromActivity(NotificationOpenedProcessor.java:57) at com.onesignal.NotificationOpenedReceiver.onReceive(NotificationOpenedReceiver.java:11) at android.app.ActivityThread.handleReceiver(ActivityThread.java:3011) at android.app.ActivityThread.-wrap18(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1544) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 

Answer 1

这是我如何使它工作：

 public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); OneSignal.startInit(this) .setNotificationOpenedHandler(new MyNotificationOpenedHandler(this)) .init(); } } 

NotificationOpenedHandler自定义类

 public class MyNotificationOpenedHandler implements OneSignal.NotificationOpenedHandler { private Application application; public MyNotificationOpenedHandler(Application application) { this.application = application; } @Override public void notificationOpened(OSNotificationOpenResult result) { // Get custom datas from notification JSONObject data = result.notification.payload.additionalData; if (data != null) { String myCustomData = data.optString("key", null); } // React to button pressed OSNotificationAction.ActionType actionType = result.action.type; if (actionType == OSNotificationAction.ActionType.ActionTaken) Log.i("OneSignalExample", "Button pressed with id: " + result.action.actionID); // Launch new activity using Application object startApp(); } private void startApp() { Intent intent = new Intent(application, MyActivity.class) .setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT | Intent.FLAG_ACTIVITY_NEW_TASK); application.startActivity(intent); } } 

不要忘记将其添加到清单中：

Answer 2

这个问题的简短答案是在初始化OneSignal的同一个类中包含推送通知的处理程序：

 public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Init OneSignal OneSignal.startInit(this).setNotificationOpenedHandler(new NotificationOpenHandler()).init(); Toolbar mToolbar = (Toolbar) findViewById(R.id.app_bar); setSupportActionBar(mToolbar); getSupportActionBar().setDisplayUseLogoEnabled(true); getSupportActionBar().setLogo(R.drawable.ic_launcher); getSupportActionBar().setDisplayShowTitleEnabled(false); if (savedInstanceState == null) { getFragmentManager().beginTransaction() .add(R.id.container, new RecordingsFragment()) .commit(); } } class NotificationOpenHandler implements OneSignal.NotificationOpenedHandler { // This fires when a notification is opened by tapping on it. @Override public void notificationOpened(OSNotificationOpenResult result) { OSNotificationAction.ActionType actionType = result.action.type; JSONObject data = result.notification.payload.additionalData; String stationName = data.optString("stationName"); String timestamp = data.optString("timestamp"); String filename = data.optString("filename"); String url = getString(R.string.callResourceUrl) + filename; Intent intent = new Intent(getApplicationContext(), CallActivity.class); intent.putExtra("stationName", stationName); intent.putExtra("time", timestamp); intent.putExtra("url", url); // intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT | Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); } } }