Then, click Show Advanced Settings in the bottom-left of the window. Intent intent = new Intent(getContext(), DatePickerActivity. Note: If you are running the app in the Emulator, you may need to edit the camera settings on your AVD.To do this, click ToolsAndroidAVD Manager and then click the green pencil to the right of the virtual device you want to use. There are the number of value types that can be included into the extras of intent (for instance, int, int, Bundle, Parcelable, and so on). This information is represented as tuple (key, value). Here, we are going to see an example to call one activity from another and vice-versa. If you want add information to your intent you can use this method. We can also pass the information from one activity to another using explicit intent. In other words, we can call another activity in android by explicit intent. Use a putExtra() method with a key to put data into the Intent extras. Android Explicit intent specifies the component to be invoked from activity. : Unable to start activity ComponentInfo: : Attempt to invoke virtual method ‘long ()’ on a null object referenceĪs can be seen in the LogCat output date and id are fine:ĬrimeFragment: id is 5ebc3a88-caa1-46c2-a0b4-d02dc9fd6e81 Android Studio creates this Intent filter for the MainActivity in your project.
The next chapter (Android Implicit Intents A Worked Example) will demonstrate the use of implicit intents. I have rewritten the code and am still getting a null pointer exception error message and can’t figure out why: The example Android Studio application project created in this chapter will demonstrate the use of an explicit intent to launch an activity, including the transfer of data between sending and receiving activities.
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