android - Capture with camera and Crop the Image Capture -

i learning cropping image. follow tutorial.

i follow tutorial throughly, , run code in android studio, when click button, force closed. please me, here code follow website.

import android.content.activitynotfoundexception; import android.content.intent; import android.graphics.bitmap; import android.net.uri; import android.os.bundle; import android.provider.mediastore; import android.support.v7.app.appcompatactivity; import android.view.view; import android.widget.button; import android.widget.imageview; import android.widget.toast;  public class mainactivity extends appcompatactivity implements view.onclicklistener {      final int pic_crop = 2;     final int camera_capture = 1;     private uri picuri;       @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);         //retrieve reference ui button         button capturebtn = (button) findviewbyid(r.id.capture_btn);         //handle button clicks         capturebtn.setonclicklistener(this);       }      public void onclick(view v) {         if (v.getid() == r.id.capture_btn) {             try {                 //use standard intent capture image                 intent captureintent = new intent(mediastore.action_image_capture);                 //we handle returned data in onactivityresult                 startactivityforresult(captureintent, camera_capture);             } catch (activitynotfoundexception anfe) {                 //display error message                 string errormessage = "whoops - device doesn't support capturing images!";                 toast toast = toast.maketext(this, errormessage, toast.length_short);                 toast.show();             }          }     }       protected void onactivityresult(int requestcode, int resultcode, intent data) {         super.onactivityresult(requestcode, resultcode, data);          if (resultcode == result_ok) {             if (requestcode == camera_capture) {                 picuri = data.getdata();                 performcrop();             } else if (requestcode == pic_crop) {                   //get returned data                 bundle extras = data.getextras();                 //get cropped bitmap                 bitmap thepic = extras.getparcelable("data");                 //retrieve reference imageview                 imageview picview = (imageview) findviewbyid(r.id.picture);                 //display returned cropped image                 picview.setimagebitmap(thepic);             }           }     }      private void performcrop() {         try {              intent cropintent = new intent("com.android.camera.action.crop");             cropintent.setdataandtype(picuri, "image/*");             cropintent.putextra("crop", "true");             cropintent.putextra("aspectx", 1);             cropintent.putextra("aspecty", 1);             cropintent.putextra("outputx", 256);             cropintent.putextra("outputd", 256);             cropintent.putextra("return-data", true);             startactivityforresult(cropintent, pic_crop);          } catch (activitynotfoundexception anfe) {             string errormessage = "whoops";             toast toast = toast.maketext(this, errormessage, toast.length_short);             toast.show();         }     } } 

this logcat

05-09 18:26:49.013 2323-2323/com.don.cropping e/androidruntime: fatal exception: main process: com.don.cropping, pid: 2323 java.lang.runtimeexception: failure delivering result resultinfo{who=null, request=1, result=0, data=null} activity {com.don.cropping/com.don.cropping.mainactivity}: java.lang.nullpointerexception: attempt invoke virtual method 'android.net.uri android.content.intent.getdata()' on null object reference @ android.app.activitythread.deliverresults(activitythread.java:3539) @ android.app.activitythread.handlesendresult(activitythread.java:3582) @ android.app.activitythread.access$1300(activitythread.java:144) @ android.app.activitythread$h.handlemessage(activitythread.java:1327) @ android.os.handler.dispatchmessage(handler.java:102) @ android.os.looper.loop(looper.java:135) @ android.app.activitythread.main(activitythread.java:5221) @ java.lang.reflect.method.invoke(native method) @ java.lang.reflect.method.invoke(method.java:372) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:899) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:694) caused by: java.lang.nullpointerexception: attempt invoke virtual method 'android.net.uri android.content.intent.getdata()' on null object reference @ com.don.cropping.mainactivity.onactivityresult(mainactivity.java:56) @ android.app.activity.dispatchactivityresult(activity.java:6139) @ android.app.activitythread.deliverresults(activitythread.java:3535) @ android.app.activitythread.handlesendresult(activitythread.java:3582)  @ android.app.activitythread.access$1300(activitythread.java:144)  @ android.app.activitythread$h.handlemessage(activitythread.java:1327)  @ android.os.handler.dispatchmessage(handler.java:102)  @ android.os.looper.loop(looper.java:135)  @ android.app.activitythread.main(activitythread.java:5221)  @ java.lang.reflect.method.invoke(native method)  @ java.lang.reflect.method.invoke(method.java:372)  @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:899)  @ com.android.internal.os.zygoteinit.main(zygoteinit.java:694) 

activity.xml

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical"     android:paddingtop="@dimen/activity_vertical_margin"     tools:context="com.don.cropping.mainactivity">      <textview         android:id="@+id/tv"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/app_name" />      <button         android:id="@+id/capture_btn"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/capture" />      <imageview         android:id="@+id/picture"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_below="@+id/capture_btn"         android:layout_margin="5dp"         android:background="@drawable/pic_border"         android:contentdescription="@string/picture" />  </linearlayout>