Question

我有一个试图访问(TelephonyManager) getActivity().getSystemService(Context.TELEPHONY_SERVICE);的登录片段，这适用于Lollipop 5.1之前的设备。当我在Marshmallow 6.01中尝试它时，它显示了安全性异常。所以我从android docs添加了代码来请求运行时权限。这是代码

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，很快我的软件包安装程序崩溃了。这是日志

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，程序包安装程序会崩溃。我已在我的清单

中添加了<uses-permission android:name="android.permission.READ_SMS"/>

Answer 1

您已将READ_SMS清单权限限制为API 22及以下版本。

<uses-permission android:name="android.permission.READ_SMS" android:maxSdkVersion="22" />

正如我在评论中提到的，除了运行时请求之外，Marshmallow及以上版本仍然需要此清单权限。从权限元素中删除maxSdkVersion属性。

Answer 2

在清单中声明权限，如下所示：

<uses-permission android:name="android.permission.READ_SMS" />

请注意，没有maxSdkVersion属性。 Reference

请求权限READ_SMS后，包安装程序在Android M中崩溃

2 个答案: