当应用程序在后台运行时，从通知中打开片段 [英] Open fragment from notification when the app in background
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问题描述
我正在使用解析将带有自定义接收器的Json通知推送到我的应用中，因为我想导航到应用中的不同位置，这取决于我收到的Json值，我有两种情况可以导航:
a)7
b)1、2、3、4、5、6
案例a打开一个activity，它可以正常工作.
case b在MainActivity中打开fragment. 这是问题所在."
我试图以正常的意图打开MainActivity，然后用片段替换它的容器.
当我尝试打开大小写b时，我在此代码段的第三行中找到了ClassCastException，因为它无法将BaseClass上下文强制转换为v4片段.
当我只给它属于接收者上下文的context时，就会遇到同样的异常.
intent = new Intent(context, MainScreen.class);
Fragment fragment = new NotificationFragment();
FragmentTransaction transaction = ((FragmentActivity) context.getApplicationContext()).getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.container, fragment).commit();
那是一个例外:
FATAL EXCEPTION: main
Process: com.myapp.SomeApp, PID: 9639
java.lang.RuntimeException: Unable to start receiver com.myapp.SomeApp.Receivers.NotifyReceiver: java.lang.ClassCastException: com.myapp.SomeApp.utils.BaseClass cannot be cast to android.support.v4.app.FragmentActivity
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2616)
at android.app.ActivityThread.access$1700(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1380)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:114)
Caused by: java.lang.ClassCastException: com.myapp.SomeApp.utils.BaseClass cannot be cast to android.support.v4.app.FragmentActivity
at com.myapp.SomeApp.Receivers.NotifyReceiver.onReceive(NotifyReceiver.java:52)
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2609)
at android.app.ActivityThread.access$1700(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1380)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:114)
这是完整的接收者代码:
public class NotifyReceiver extends BroadcastReceiver {
private String title, itemID, notifyType;
private int id;
@Override
public void onReceive(Context context, Intent intent) {
if (intent != null) {
try {
String response = intent.getExtras().getString("com.parse.Data");
JSONObject data = new JSONObject(response);
itemID = data.getString("ItemID");
notifyType = data.getString("NotificationTypeID");
title = data.getString("alert");
id = Integer.parseInt(notifyType);
} catch (JSONException e) {
Log.e("NotifyReceiver", e.getMessage());
}
}
if (id == 7) {
intent = new Intent(context, TendersActivity.class);
} else {
intent = new Intent(context, MainScreen.class);
Fragment fragment = new NotificationFragment();
FragmentTransaction transaction =
((FragmentActivity) context.getApplicationContext())
.getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.container, fragment).commit();
}
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
Notification notify = new NotificationCompat.Builder(context)
.setContentTitle(context.getResources().getString(R.string.app_name))
.setContentText(title)
.setSmallIcon(R.drawable.ic_stat_notify)
.setContentIntent(pendingIntent)
.setVibrate(new long[]{250, 250, 250, 250})
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setAutoCancel(true)
.build();
NotificationManager manager = (NotificationManager)
context.getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(0, notify);
}
}
解决方案
请用以下代码替换您的else部分:
else {
intent = new Intent(context, MainScreen.class);
resultIntent.putExtra("From", "notifyFrag");
}
然后在您的MainScreen.class中，检查该活动是否使用以下代码从通知键调用:
String type = getIntent().getStringExtra("From");
if (type != null) {
switch (type) {
case "notifyFrag":
Fragment fragment = new NotificationFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.container, fragment).commit();
break;
}
}
希望这会有所帮助.
I am using parse to push Json notifications to my app with custom receiver because I want to navigate to different places in the app and that's depends on Json value I receive, I have 2 cases to navigate:
a) 7
b) 1, 2, 3, 4, 5, 6
case a opens an activity and that's works as normal.
case b open a fragment in the `MainActivity. "Here's the problem."
I tried to open the MainActivity with normal intent then replace the container of it with the fragment.
When I try to open case b I got ClassCastException in the third line from this snippet because it's cannot cast the BaseClass context to v4 fragment.
I got the same exception when I give it just the context that belongs to the receiver context.
intent = new Intent(context, MainScreen.class);
Fragment fragment = new NotificationFragment();
FragmentTransaction transaction = ((FragmentActivity) context.getApplicationContext()).getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.container, fragment).commit();
That's the exception:
FATAL EXCEPTION: main
Process: com.myapp.SomeApp, PID: 9639
java.lang.RuntimeException: Unable to start receiver com.myapp.SomeApp.Receivers.NotifyReceiver: java.lang.ClassCastException: com.myapp.SomeApp.utils.BaseClass cannot be cast to android.support.v4.app.FragmentActivity
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2616)
at android.app.ActivityThread.access$1700(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1380)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:114)
Caused by: java.lang.ClassCastException: com.myapp.SomeApp.utils.BaseClass cannot be cast to android.support.v4.app.FragmentActivity
at com.myapp.SomeApp.Receivers.NotifyReceiver.onReceive(NotifyReceiver.java:52)
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2609)
at android.app.ActivityThread.access$1700(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1380)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:114)
That's the full receiver code:
public class NotifyReceiver extends BroadcastReceiver {
private String title, itemID, notifyType;
private int id;
@Override
public void onReceive(Context context, Intent intent) {
if (intent != null) {
try {
String response = intent.getExtras().getString("com.parse.Data");
JSONObject data = new JSONObject(response);
itemID = data.getString("ItemID");
notifyType = data.getString("NotificationTypeID");
title = data.getString("alert");
id = Integer.parseInt(notifyType);
} catch (JSONException e) {
Log.e("NotifyReceiver", e.getMessage());
}
}
if (id == 7) {
intent = new Intent(context, TendersActivity.class);
} else {
intent = new Intent(context, MainScreen.class);
Fragment fragment = new NotificationFragment();
FragmentTransaction transaction =
((FragmentActivity) context.getApplicationContext())
.getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.container, fragment).commit();
}
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
Notification notify = new NotificationCompat.Builder(context)
.setContentTitle(context.getResources().getString(R.string.app_name))
.setContentText(title)
.setSmallIcon(R.drawable.ic_stat_notify)
.setContentIntent(pendingIntent)
.setVibrate(new long[]{250, 250, 250, 250})
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setAutoCancel(true)
.build();
NotificationManager manager = (NotificationManager)
context.getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(0, notify);
}
}
解决方案
Please replace your else section by this code:
else {
intent = new Intent(context, MainScreen.class);
resultIntent.putExtra("From", "notifyFrag");
}
And in your MainScreen.class check that if the activity called from notification key using this code:
String type = getIntent().getStringExtra("From");
if (type != null) {
switch (type) {
case "notifyFrag":
Fragment fragment = new NotificationFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.container, fragment).commit();
break;
}
}
Hope this helps.
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