在Activity中申请权限时首先要在清单文件中明确要申请的权限,否则会出现如下异常。
FATAL EXCEPTION: main Process: com.google.android.packageinstaller, PID: 27498 java.lang.RuntimeException:
Unable to start activity ComponentInfo{com.google.android.packageinstaller/com.android.packageinstaller.permission.ui.GrantPermissionsActivity}:java.lang.NullPointerException: Attempt to get length of null array at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)