在“活动"上下文之外启动新的“活动". [英] Start new Activity outside the Activity context.

问题描述

我尝试启动 Activity 并在我的 AsyncTask 类( onPostExecute())中关闭其他项目.

I tried to start an Activity and close other in my AsyncTask class (onPostExecute()).

我的代码:

Intent i = new Intent(parentActivity, ThunderHunter.class);
c.startActivity(i);
parentActivity.finish();

但是它不起作用，logcat显示:

But it doesn't work, logcat shows :

08-01 18:01:27.640: E/AndroidRuntime(12398): android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
08-01 18:01:27.640: E/AndroidRuntime(12398):    at android.app.ContextImpl.startActivity(ContextImpl.java:1029)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at android.app.ContextImpl.startActivity(ContextImpl.java:1023)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at android.content.ContextWrapper.startActivity(ContextWrapper.java:283)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at com.radzik.thunter.FunkcjeAPI$Logowanie.onPostExecute(FunkcjeAPI.java:151)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at com.radzik.thunter.FunkcjeAPI$Logowanie.onPostExecute(FunkcjeAPI.java:1)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at android.os.AsyncTask.finish(AsyncTask.java:631)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at android.os.AsyncTask.access$600(AsyncTask.java:177)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at android.os.Handler.dispatchMessage(Handler.java:99)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at android.os.Looper.loop(Looper.java:137)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at android.app.ActivityThread.main(ActivityThread.java:4898)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at java.lang.reflect.Method.invokeNative(Native Method)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at java.lang.reflect.Method.invoke(Method.java:511)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
08-01 18:01:27.640: E/AndroidRuntime(12398):    at dalvik.system.NativeStart.main(Native Method)

所以我将代码更改为:

Intent i = new Intent(context, ThunderHunter.class);
c.startActivity(i);
parentActivity.finish();

但是没有例外的结果(仍然是相同的错误).

But without excepted results (still same error).

有什么办法可以解决这个问题吗?

Is there any way to that properly ?

推荐答案

logcat告诉您第一行出现了什么问题

The logcat tells you what the problem is in the first line

Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag

添加该标志

Intent i = new Intent(context, ThunderHunter.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
c.startActivity(i);
parentActivity.finish();

您可以在文档中的此处获取所有可用的 Intent Flags 此处的列表

You can get a list of all available Intent Flags here in the docs

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