通知栏显示下载进度

[ze_lin_huang]

使用自定义的通知栏布局，实现的功能：点击按钮，从网络下载一张图片，通知栏显示下载进度，下载完毕就显示图片。

我的代码是只是用AsyncTask去下载，暂时不考虑Service。

我的问题是：在通知栏里面可以显示下载进度，可以下载成功显示，但是在下载过程中，打开通知栏有卡死问题。

我不知道是代码问题，还是要用Service，那位大牛帮我看下，谢谢。

代码清单：

public class CustomProgressNoticeActivity extends Activity {

	private Button button1;
	private ImageView imageView;
	private NotificationCompat.Builder mBuilder;
	private NotificationManager mNotificationManager;
	private int id = 1000;
	private RemoteViews contentViews;
	private String picPath = "http://pic1a.nipic.com/2008-11-12/2008111215916645_2.jpg";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_custom_progress_notice);

		button1 = (Button) findViewById(R.id.button1);
		imageView = (ImageView) findViewById(R.id.imageView1);

		contentViews = new RemoteViews(getPackageName(), R.layout.notice_download);
		// 通过控件的Id设置属性
		contentViews.setImageViewResource(R.id.imageNo, R.drawable.ic_launcher);
		contentViews.setTextViewText(R.id.tv_title, "图片下载");

		mBuilder = new NotificationCompat.Builder(CustomProgressNoticeActivity.this).setSmallIcon(R.drawable.ic_launcher).setTicker("图片下载...");
		mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
		mBuilder.setContent(contentViews);
		mBuilder.setAutoCancel(true);

		button1.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				new DownImage().execute(picPath);
			}
		});
	}

	class DownImage extends AsyncTask<String, Integer, Bitmap> {

		@Override
		protected Bitmap doInBackground(String... params) {
			InputStream input = null;
			Bitmap bitmap = null;
			ByteArrayOutputStream bos = new ByteArrayOutputStream();
			try {

				HttpClient httpClient = new DefaultHttpClient();
				HttpGet httpGet = new HttpGet(params[0]);
				HttpResponse httpResponse = httpClient.execute(httpGet);
				if (httpResponse.getStatusLine().getStatusCode() == 200) {
					input = httpResponse.getEntity().getContent();
					byte data[] = new byte[1024];
					long fileLength = httpResponse.getEntity().getContentLength();
					long total = 0;
					int count;
					while ((count = input.read(data)) != -1) {
						total += count;
						publishProgress((int) (total * 100 / fileLength));
						bos.write(data, 0, count);
					}
				}

				bos.flush();
				byte[] imgBytes = bos.toByteArray();
				bitmap = BitmapFactory.decodeByteArray(imgBytes, 0, imgBytes.length);

			} catch (Exception e) {
				e.printStackTrace();
			} finally {
				try {
					if (input != null)
						input.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return bitmap;
		}

		@Override
		protected void onPostExecute(Bitmap result) {
			imageView.setImageBitmap(result);
			// mBuilder.setDefaults(Notification.DEFAULT_SOUND);
		}

		@Override
		protected void onProgressUpdate(Integer... values) {
			contentViews.setProgressBar(R.id.pb_download, 100, values[0], false);
			contentViews.setTextViewText(R.id.tv_currentPos, values[0] + "%");
			mNotificationManager.notify(id, mBuilder.build());
		}

		@Override
		protected void onPreExecute() {
			contentViews.setProgressBar(R.id.pb_download, 100, 0, false);
			contentViews.setTextViewText(R.id.tv_currentPos, "0%");
			mNotificationManager.notify(id, mBuilder.build());
		}

	}
}

[tracy_basket]

代码没看出哪里有问题。只是感觉通知栏一边在不停的刷新。一边又要响应你的触摸事件。是比较忙。