Android determines whether the SD card and SIM card are available

Sdcard and SIM card are used in a project. When using sdcard, You need to determine whether the status can be read and written. When using a SIM card, you must determine whether it is readable. For how to do this, see the following two functions:

// Whether sdcard can be read/written
Public Boolean iscanusesdcard (){
Try {
Return environment. getexternalstoragestate (). Equals (
Environment. media_mounted );
} Catch (exception e ){
E. printstacktrace ();
}
Return false;
}
// Whether the SIM card is readable
Public Boolean iscanusesim (){
Try {
Telephonymanager Mgr = (telephonymanager) getsystemservice (context. telephony_service );

Return telephonymanager. sim_state_ready = Mgr
. Getsimstate ();
} Catch (exception e ){
E. printstacktrace ();
}
Return false;
}

Mainly used: Android. telephony. telephonymanager, Android. OS. Environment, and Android. App. activity. getsystemservice

Excerpt from: spiritual pure earth column