问题描述
我有一个尝试访问(TelephonyManager) getActivity().getSystemService(Context.TELEPHONY_SERVICE);的登录片段，这在Lollipop 5.1之前的设备上运行良好.当我在棉花糖6.01中尝试过时，它显示了安全异常.所以我从android docs添加了代码以请求运行时权限.这是代码
I have a Login Fragment that tries to access (TelephonyManager) getActivity().getSystemService(Context.TELEPHONY_SERVICE); this works well with devices up to Lollipop 5.1. And when I tried it in Marshmallow 6.01 it showed security exception. So I added code from android docs to request permission on runtime. Here is the code
int permissionCheck = ContextCompat.checkSelfPermission(getActivity(),Manifest.permission.READ_SMS);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(), Manifest.permission.READ_SMS)) {
// Show an expanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(getActivity(),new String[]{Manifest.permission.READ_SMS},REQUEST_SMS);
// REQUEST_SMS is an
// app-defined int constant. The callback method gets the
// result of the request.
}
}else {
tMgr = (TelephonyManager) getActivity().getSystemService(Context.TELEPHONY_SERVICE);
}
现在我的应用程序启动，并且我的软件包安装程序很快崩溃了.这是日志
Now my app starts and soon my package installer crashes. Here is the log
03-23 12:12:13.618 8949-8949/com.android.packageinstaller E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.android.packageinstaller, PID: 8949
Theme: themes:{default=overlay:system, iconPack:system, fontPkg:system, com.android.systemui=overlay:system}
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.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:2450)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2520)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5466)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to get length of null array
at com.android.packageinstaller.permission.ui.GrantPermissionsActivity.computePermissionGrantState(GrantPermissionsActivity.java:293)
at com.android.packageinstaller.permission.ui.GrantPermissionsActivity.updateDefaultResults(GrantPermissionsActivity.java:343)
at com.android.packageinstaller.permission.ui.GrantPermissionsActivity.onCreate(GrantPermissionsActivity.java:100)
at android.app.Activity.performCreate(Activity.java:6251)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2403)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2520)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5466)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
我认为，当应用程序尝试显示用于请求权限的UI时，程序包安装程序将崩溃.我已经在清单
I think the package installer is crashing when the app is trying to display UI for requesting permissions.I have already added <uses-permission android:name="android.permission.READ_SMS"/> in my manifest
推荐答案
您已将READ_SMS清单权限限制为API 22及更低版本.
You've restricted the READ_SMS manifest permission to API 22 and below.
<uses-permission android:name="android.permission.READ_SMS" android:maxSdkVersion="22" />
正如我在评论中提到的那样，除了运行时请求外，在棉花糖及更高版本中仍需要此清单权限.从权限元素中删除maxSdkVersion属性.
As I mentioned in the comments, this manifest permission is still needed in Marshmallow and above, in addition to the runtime request. Remove the maxSdkVersion attribute from the permission element.
这篇关于请求权限READ_SMS后，Android M中的Package Installer崩溃的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！