Android: ¿qué elegir para los valores de la petición?

Métodos como ActivityCompat.requestPermissions requieren que les paso un código de solicitud que puedo probar más tarde en una devolución de llamada (en este caso onRequestPermissionsResult ). ¿Hay algún tipo de valor de las mejores prácticas que debo pasar en el código de solicitud? Me he dado cuenta de que si simplemente ingreso un int azar a veces tengo un error como este:

 java.lang.IllegalArgumentException: Can only use lower 8 bits for requestCode 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: FATAL EXCEPTION: main 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: Process: my package, PID: 8315 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{mypackage.myactivity}: java.lang.IllegalArgumentException: Can only use lower 8 bits for requestCode 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:148) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: Caused by: java.lang.IllegalArgumentException: Can only use lower 8 bits for requestCode 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.support.v4.app.FragmentActivity.validateRequestPermissionsRequestCode(FragmentActivity.java:799) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.support.v4.app.ActivityCompatApi23.requestPermissions(ActivityCompat23.java:29) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.support.v4.app.ActivityCompat.requestPermissions(ActivityCompat.java:316) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at mypackage.myactivity.checkReadPhoneState(PermissionsGatewayActivity.java:48) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at mypackage.myactivity.onCreate(PermissionsGatewayActivity.java:36) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.Activity.performCreate(Activity.java:6237) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.ActivityThread.-wrap11(ActivityThread.java) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.os.Looper.loop(Looper.java:148) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5417) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 10-25 16:47:43.652 8315-8315/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

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  /** * Modifies the standard behavior to allow results to be delivered to fragments. * This imposes a restriction that requestCode be <= 0xffff. */ @Override public void startActivityForResult(Intent intent, int requestCode) { if (requestCode != -1 && (requestCode&0xffff0000) != 0) { throw new IllegalArgumentException("Can only use lower 16 bits for requestCode"); } super.startActivityForResult(intent, requestCode); } 

 @Override public final void validateRequestPermissionsRequestCode(int requestCode) { // We use 16 bits of the request code to encode the fragment id when // requesting permissions from a fragment. Hence, requestPermissions() // should validate the code against that but we cannot override it as // we can not then call super and also the ActivityCompat would call // back to this override. To handle this we use dependency inversion // where we are the validator of request codes when requesting // permissions in ActivityCompat. if (!mRequestedPermissionsFromFragment && requestCode != -1 && (requestCode & 0xffff0000) != 0) { throw new IllegalArgumentException("Can only use lower 16 bits for requestCode"); } }