title: Attempt to invoke virtual method 'void android.widget.ImageView.setImageBitmap(android.graphics.Bitmap)' on a null object reference
body: <p>I keep getting this error and i'm not sure why. I've tried googling it but no luck there.</p>
  
  <blockquote>
    <p>04-21 15:43:24.822    2461-2461/com.example.s.myapplication D/AndroidRuntime﹕ Shutting down VM
        04-21 15:43:24.823    2461-2461/com.example.s.myapplication E/AndroidRuntime﹕ FATAL EXCEPTION: main
            Process: com.example.s.myapplication, PID: 2461
            java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.example.s.myapplication/com.example.s.myapplication.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setImageBitmap(android.graphics.Bitmap)' on a null object reference
                    at android.app.ActivityThread.deliverResults(ActivityThread.java:3539)
                    at android.app.ActivityThread.handleSendResult(ActivityThread.java:3582)
                    at android.app.ActivityThread.access$1300(ActivityThread.java:144)
                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1327)
                    at android.os.Handler.dispatchMessage(Handler.java:102)
                    at android.os.Looper.loop(Looper.java:135)
                    at android.app.ActivityThread.main(ActivityThread.java:5221)
                    at java.lang.reflect.Method.invoke(Native Method)
                    at java.lang.reflect.Method.invoke(Method.java:372)
                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
             Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setImageBitmap(android.graphics.Bitmap)' on a null object reference
                    at com.example.s.myapplication.MainActivity.onActivityResult(MainActivity.java:46)
                    at android.app.Activity.dispatchActivityResult(Activity.java:6139)
                    at android.app.ActivityThread.deliverResults(ActivityThread.java:3535)
                    at android.app.ActivityThread.handleSendResult(ActivityThread.java:3582)
                    at android.app.ActivityThread.access$1300(ActivityThread.java:144)
                    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1327)
                    at android.os.Handler.dispatchMessage(Handler.java:102)
                    at android.os.Looper.loop(Looper.java:135)
                    at android.app.ActivityThread.main(ActivityThread.java:5221)
                    at java.lang.reflect.Method.invoke(Native Method)
                    at java.lang.reflect.Method.invoke(Method.java:372)
                    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
                    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
        a</p>
  </blockquote>
  
  <p>This is my main activity. What the application is meant to do is: </p>
  
  <ol>
  <li>Take a photo</li>
  <li>Save the photo in a tmp location</li>
  <li>load the photo into a imageview</li>
  </ol>
  
  <p>.</p>
  
  <pre><code>package com.example.s.myapplication;
  
  import android.app.Activity;
  import android.content.Intent;
  import android.graphics.Bitmap;
  import android.graphics.BitmapFactory;
  import android.net.Uri;
  import android.os.Environment;
  import android.provider.MediaStore;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.ImageView;
  
  import java.io.File;
  
  
  public class MainActivity extends Activity {
  
      static final int REQUEST_IMAGE_CAPTURE = 1;
      private ImageView imageView;
  
  
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          openCamera();
          setContentView(R.layout.activity_main);
      }
  
      public void openCamera() {
          Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
          File file = new File(Environment.getExternalStorageDirectory() + File.separator + "image.jpg");
          takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
          startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
      }
  
  
  
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
          //Check that request code matches ours:
          if (requestCode == REQUEST_IMAGE_CAPTURE) {
              //Get our saved file into a bitmap object:
              File file = new File(Environment.getExternalStorageDirectory() + File.separator + "image.jpg");
              Bitmap image = decodeSampledBitmapFromFile(file.getAbsolutePath(), 1000, 700);
              imageView.setImageBitmap(image);
          }
      }
  
      public boolean isExternalStorageWritable() {
          String state = Environment.getExternalStorageState();
          if (Environment.MEDIA_MOUNTED.equals(state)) {
              return true;
          }
          return false;
      }
  
      public static Bitmap decodeSampledBitmapFromFile(String path, int reqWidth, int reqHeight) { 
  
          //First decode with inJustDecodeBounds=true to check dimensions
          final BitmapFactory.Options options = new BitmapFactory.Options();
          options.inJustDecodeBounds = true;
          BitmapFactory.decodeFile(path, options);
  
          // Calculate inSampleSize, Raw height and width of image
          final int height = options.outHeight;
          final int width = options.outWidth;
          options.inPreferredConfig = Bitmap.Config.RGB_565;
          int inSampleSize = 1;
  
          if (height &gt; reqHeight) {
              inSampleSize = Math.round((float) height / (float) reqHeight);
          }
          int expectedWidth = width / inSampleSize;
  
          if (expectedWidth &gt; reqWidth) {
              //if(Math.round((float)width / (float)reqWidth) &gt; inSampleSize) // If bigger SampSize..
              inSampleSize = Math.round((float) width / (float) reqWidth);
          }
  
          options.inSampleSize = inSampleSize;
  
          // Decode bitmap with inSampleSize set
          options.inJustDecodeBounds = false;
  
          return BitmapFactory.decodeFile(path, options);
      }
  
      public void capture_btn(View v) {
          Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
          File file = new File(Environment.getExternalStorageDirectory() + File.separator + "image.jpg");
          takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
          startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
      }
  }
  </code></pre>