zoukankan      html  css  js  c++  java
  • startActivity时报错Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag

    原代码如下:

    Intent intent = new Intent();
    intent.setClass(mContext, PhotoView.class);
    Bundle bundle = new Bundle();
    intent.putExtras(bundle); 
    mContext.startActivity(intent);

    报错如下:

    06-28 11:24:40.359: E/AndroidRuntime(7397): android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.app.ContextImpl.startActivity(ContextImpl.java:617)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.content.ContextWrapper.startActivity(ContextWrapper.java:258)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at com.hotalk.ui.homepage.favorites.FavoritesListAdapter$7.onClick(FavoritesListAdapter.java:1509)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.view.View.performClick(View.java:2408)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.view.View$PerformClick.run(View.java:8816)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.os.Handler.handleCallback(Handler.java:587)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.os.Handler.dispatchMessage(Handler.java:92)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.os.Looper.loop(Looper.java:123)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at android.app.ActivityThread.main(ActivityThread.java:4627)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at java.lang.reflect.Method.invokeNative(Native Method)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at java.lang.reflect.Method.invoke(Method.java:521)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
    06-28 11:24:40.359: E/AndroidRuntime(7397):     at dalvik.system.NativeStart.main(Native Method)

    原因是:

      Context中有一个startActivity方法,Activity继承自Context,重载了startActivity方法。如果使用 Activity的startActivity方法,不会有任何限制,而如果使用Context的startActivity方法的话,就需要开启一个新的task,遇到上面那个异常的,都是因为使用了Context的startActivity方法。解决办法是,加一个flag。intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 

    修改后代码如下:

    Intent intent = new Intent();
    intent.setClass(mContext, PhotoView.class);
    Bundle bundle = new Bundle();
    intent.putExtras(bundle);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  
    mContext.startActivity(intent);
  • 相关阅读:
    C++雾中风景14:CRTP, 模板的黑魔法
    ClickHouse源码笔记1:聚合函数的实现
    C++雾中风景番外篇4:GCC升级二三事
    C++雾中风景13:volatile解惑
    AeroSpike踩坑手记1:Architecture of a Real Time Operational DBMS论文导读
    Linux 程序设计1:深入浅出 Linux 共享内存
    C++雾中风景番外篇3:GDB与Valgrind ,调试代码内存的工具
    C++雾中风景番外篇2:Gtest 与 Gmock,聊聊C++的单元测试
    C++雾中风景12:聊聊C++中的Mutex,以及拯救生产力的Boost
    用TensorFlow搭建一个万能的神经网络框架(持续更新)
  • 原文地址:https://www.cnblogs.com/shaweng/p/2570394.html
Copyright © 2011-2022 走看看