<uses-feature> and <uses-permisstion> analysis and comparison
Regarding the self-understanding of <uses-feature> and <uses-permisstion>, declaring the software and hardware features that an application needs to use.
1. <uses- feature> It is generally only effective when APP is published on GooglePlay. It helps GooglePlay to filter your application. It clearly describes what hardware or software-related functions your program must use in the program. If some devices search for applications on GooglePlay or on the details page of a program, programs that do not support your device will be filtered out.
For example: <uses-featrue android="" /> Your device does not have the camera hardware, and the function list of a certain app clearly states that my program needs to use the camera, so your device will not be allowed to install the application. If you have used GooglePlay, you should have experienced this. Not all devices can install the programs on GooglePlay.
2. Generally, we will not list all <uses-feature> in the program, or for some reason, <uses-feature> will not appear in our program at all.
If the camera function is just an auxiliary function of our program, it is not necessary, that is, the user can install it without the camera hardware, then you need to write it like this:
<uses-featrue android="" android:requied="false"/>
3. <uses-permisstion> is for use on your Android system. If you want to use a certain hardware device or software function, you must apply for this permission.
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