在imageview中設置位圖時出現NullPointerException

Question

大家好，我在設置ImageView時得到了一個N​​PE位圖。位圖已經從字節數組解碼並且不爲空或空。有任何想法嗎？感謝

public class LoadPic extends Activity{ 

    private static final String TAG = "Loadpic"; 
    private ImageView imageview; 
    private File tempFile; 
    private byte[] imageArray; 

    public void onCreate(Bundle icicle) { 
     super.onCreate(icicle); 

     Log.e(TAG, " loadpic onCreate"); 
     setContentView(R.layout.load); 

     imageview = (ImageView)findViewById(R.id.imageView1); 

     tempFile = new File(Environment.getExternalStorageDirectory(). 
      getAbsolutePath() + "/"+"image.jpg"); 

     imageArray = new byte[(int)tempFile.length()]; 

    try{ 

     InputStream is = new FileInputStream(tempFile); 
     BufferedInputStream bis = new BufferedInputStream(is); 
     DataInputStream dis = new DataInputStream(bis); 


     int i = 0; 

     while (dis.available() > 0) { 
     imageArray[i] = dis.readByte(); 
     i++; 
     } 

     dis.close(); 

    } catch (Exception e) { 

      e.printStackTrace(); 
     } 

     BitmapFactory.Options bfo = new BitmapFactory.Options(); 
     bfo.inSampleSize = 5; 
     Bitmap bm = BitmapFactory.decodeByteArray(imageArray, 0, imageArray.length, bfo); 
     Log.e(TAG, bm.toString()); 
     imageview.setImageBitmap(bm); 

    }// end of onCreate 


}//end of Activity 








<?xml version="1.0" encoding="UTF-8"?> 
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
        android:orientation="vertical" android:layout_width="match_parent" 
        android:layout_height="wrap_content" android:gravity="fill"> 


     <ImageView android:id="@+id/imageView1" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"></ImageView> 


    </RelativeLayout>    

Answer 1

確保與android:id="@+id/imageView1"的ImageView居然出現在res/layout/load.xml。