内容观察者读取短信数据库报错 Could not execute method for android:onClick

11-25 03:42:42.187 4547-4547/com.example.gongxin2.sms E/AndroidRuntime: FATAL EXCEPTION: main
                                                                        Process: com.example.gongxin2.sms, PID: 4547
                                                                        java.lang.IllegalStateException: Could not execute method for android:onClick
                                                                            at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
                                                                            at android.view.View.performClick(View.java:5198)
                                                                            at android.view.View$PerformClick.run(View.java:21147)
                                                                            at android.os.Handler.handleCallback(Handler.java:739)
                                                                            at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                            at android.os.Looper.loop(Looper.java:148)
                                                                            at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                            at java.lang.reflect.Method.invoke(Native Method)
                                                                            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                                                                         Caused by: java.lang.reflect.InvocationTargetException
                                                                            at java.lang.reflect.Method.invoke(Native Method)
                                                                            at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
                                                                            at android.view.View.performClick(View.java:5198) 
                                                                            at android.view.View$PerformClick.run(View.java:21147) 
                                                                            at android.os.Handler.handleCallback(Handler.java:739) 
                                                                            at android.os.Handler.dispatchMessage(Handler.java:95) 
                                                                            at android.os.Looper.loop(Looper.java:148) 
                                                                            at android.app.ActivityThread.main(ActivityThread.java:5417) 
                                                                            at java.lang.reflect.Method.invoke(Native Method) 
                                                                            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                                                                            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
                                                                         Caused by: java.lang.SecurityException: Permission Denial: reading com.android.providers.telephony.SmsProvider uri content://sms/ from pid=4547, uid=10063 requires android.permission.READ_SMS, or grantUriPermission()
                                                                            at android.os.Parcel.readException(Parcel.java:1599)
                                                                            at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:183)
                                                                            at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
                                                                            at android.content.ContentProviderProxy.query(ContentProviderNative.java:421)
                                                                            at android.content.ContentResolver.query(ContentResolver.java:491)
                                                                            at android.content.ContentResolver.query(ContentResolver.java:434)
                                                                            at com.example.gongxin2.sms.MainActivity.click(MainActivity.java:25)
                                                                            at java.lang.reflect.Method.invoke(Native Method) 
                                                                            at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
                                                                            at android.view.View.performClick(View.java:5198) 
                                                                            at android.view.View$PerformClick.run(View.java:21147) 
                                                                            at android.os.Handler.handleCallback(Handler.java:739) 
                                                                            at android.os.Handler.dispatchMessage(Handler.java:95) 
                                                                            at android.os.Looper.loop(Looper.java:148) 
                                                                            at android.app.ActivityThread.main(ActivityThread.java:5417) 
                                                                            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) 
                                                                        
                                                                        
                                                                        --------- beginning of system