在使用Image-Loade框架中的listview加载图片出现的空指针异常

[KingGourod]

12-12 01:29:49.336: E/AndroidRuntime(1803): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.my_img_loder/com.example.my_img_loder.MainActivity}: java.lang.NullPointerException
12-12 01:29:49.336: E/AndroidRuntime(1803): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
12-12 01:29:49.336: E/AndroidRuntime(1803): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
12-12 01:29:49.336: E/AndroidRuntime(1803): at android.app.ActivityThread.access$800(ActivityThread.java:135)
12-12 01:29:49.336: E/AndroidRuntime(1803): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
12-12 01:29:49.336: E/AndroidRuntime(1803): at android.os.Handler.dispatchMessage(Handler.java:102)
12-12 01:29:49.336: E/AndroidRuntime(1803): at android.os.Looper.loop(Looper.java:136)
12-12 01:29:49.336: E/AndroidRuntime(1803): at android.app.ActivityThread.main(ActivityThread.java:5001)
12-12 01:29:49.336: E/AndroidRuntime(1803): at java.lang.reflect.Method.invokeNative(Native Method)
12-12 01:29:49.336: E/AndroidRuntime(1803): at java.lang.reflect.Method.invoke(Method.java:515)
12-12 01:29:49.336: E/AndroidRuntime(1803): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
12-12 01:29:49.336: E/AndroidRuntime(1803): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
12-12 01:29:49.336: E/AndroidRuntime(1803): at dalvik.system.NativeStart.main(Native Method)
12-12 01:29:49.336: E/AndroidRuntime(1803): Caused by: java.lang.NullPointerException
12-12 01:29:49.336: E/AndroidRuntime(1803): at com.example.my_img_loder.MainActivity.onCreate(MainActivity.java:65)
12-12 01:29:49.336: E/AndroidRuntime(1803): at android.app.Activity.performCreate(Activity.java:5231)
12-12 01:29:49.336: E/AndroidRuntime(1803): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
12-12 01:29:49.336: E/AndroidRuntime(1803): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
12-12 01:29:49.336: E/AndroidRuntime(1803): ... 11 more
下面是代码
错误日志指向listView.setAdapter(new imageadapter()); 这让我有点想不通为什么这里报了空，在适配器里面的代码应该是没有错的。求各位大大帮助，求各位大大告诉错误原因

public class MainActivity extends Activity {
	private static final String TAG = MainActivity.class.getSimpleName();
	DisplayImageOptions options;
	private ListView listView;
	private ViewHoaler mHoaler;
	String[] imageUrls = Constants.IMAGES;
//	private boolean pauseOnScroll = false;
//	private boolean pauseOnFling = true;

	private LayoutInflater inflater;

//	private void applyScrollListener() {
//		listView.setOnScrollListener(new PauseOnScrollListener(ImageLoader
//				.getInstance(), pauseOnScroll, pauseOnFling));
//	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		inflater=LayoutInflater.from(this);
		options = new DisplayImageOptions.Builder()
				.showImageOnLoading(R.drawable.ic_launcher)
				.showImageForEmptyUri(R.drawable.ic_launcher)
				.showImageOnFail(R.drawable.ic_launcher).cacheInMemory(true)
				.cacheOnDisk(true).considerExifParams(true)
				.displayer(new RoundedBitmapDisplayer(20)).build();
		listView = (ListView) findViewById(android.R.id.list);
		for (int i = 0; i < imageUrls.length; i++) {
			String[] imgString=imageUrls;
			Log.d(TAG, "msg"+imgString);
		}
		listView.setAdapter(new imageadapter());
	
	}

	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		AnimateFirstDisplayListener.displayedImages.clear();
	}

	@Override
	protected void onResume() {
		// TODO Auto-generated method stub
		super.onResume();
		Log.d(TAG, "onResume");

	}

	class imageadapter extends BaseAdapter {
		//LayoutInflater inflater;
		//private ImageLoadingListener loadingListener = new AnimateFirstDisplayListener();


		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return imageUrls.length;

		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return imageUrls[position];
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			View view = convertView;
			final ViewHoaler holder;
			if (convertView == null) {
				view = inflater.inflate(R.layout.list_iage, parent, false);
				holder = new ViewHoaler();
				holder.tView = (TextView) view.findViewById(R.id.text);
				holder.iView = (ImageView) view.findViewById(R.id.image);
				view.setTag(holder);
			} else {
				holder = (ViewHoaler) view.getTag();
			}

			holder.tView.setText("Item " + (position + 1));

			ImageLoader.getInstance().displayImage(imageUrls[position], holder.iView, options, null);

			return view;
			// Log.d(TAG, "");
		}

	}

	private static class AnimateFirstDisplayListener extends
			SimpleImageLoadingListener {
		static final List<String> displayedImages = Collections
				.synchronizedList(new LinkedList<String>());

		@Override
		public void onLoadingComplete(String imageUri, View view,
				Bitmap loadedImage) {
			if (loadedImage != null) {
				ImageView imageView = (ImageView) view;
				boolean firstDisplay = !displayedImages.contains(imageUri);
				if (firstDisplay) {
					FadeInBitmapDisplayer.animate(imageView, 500);
					displayedImages.add(imageUri);
					Log.d(TAG, "displayedimages");
				}
			}
			// TODO Auto-generated method stub
			super.onLoadingComplete(imageUri, view, loadedImage);
		}

	}

	private static class ViewHoaler {
		private TextView tView;
		private ImageView iView;
	}

[KingGourod]

Android新手小白求各位大神帮助啊

[jklwan]

listView = (ListView) findViewById(android.R.id.list); android.R.id.list这是系统的R文件，而不是你的R文件，所以你的listview是null。

[KingGourod]

额！对！这个list是系统的。框架中的布局直接用系统的list来应用，我们用的时候是要加载自己的listview布局，谢了哈