Android设立Notification从网络中加载图片,解决点击无法消失的bug

Notification的构造函数中只支持使用资源文件的图片作为图片，但是如果我们想用网络中的图片怎么办呢。

我们知道，给Notification设置内容的时候调用的是setLatestEventInfo方法，当我们点击去看该方法的时候，所有的结果都一目了然了。

public void setLatestEventInfo(Context context,            CharSequence contentTitle, CharSequence contentText, PendingIntent contentIntent) {        // TODO: rewrite this to use Builder        RemoteViews contentView = new RemoteViews(context.getPackageName(),                R.layout.notification_template_base);        if (this.icon != 0) {            contentView.setImageViewResource(R.id.icon, this.icon);        }        if (priority < PRIORITY_LOW) {            contentView.setInt(R.id.icon,                    "setBackgroundResource", R.drawable.notification_template_icon_low_bg);            contentView.setInt(R.id.status_bar_latest_event_content,                    "setBackgroundResource", R.drawable.notification_bg_low);        }        if (contentTitle != null) {            contentView.setTextViewText(R.id.title, contentTitle);        }        if (contentText != null) {            contentView.setTextViewText(R.id.text, contentText);        }        if (this.when != 0) {            contentView.setViewVisibility(R.id.time, View.VISIBLE);            contentView.setLong(R.id.time, "setTime", when);        }        if (this.number != 0) {            NumberFormat f = NumberFormat.getIntegerInstance();            contentView.setTextViewText(R.id.info, f.format(this.number));        }        this.contentView = contentView;        this.contentIntent = contentIntent;    }

  this.contentView = contentView;  this.contentIntent = contentIntent;

看RemoteViews中的

public void setImageViewBitmap(int viewId, Bitmap bitmap) {        setBitmap(viewId, "setImageBitmap", bitmap);    }

我们只有一个目的，把图片换成网络中加载的图片，我们先把图片从网络中加载到本地，看代码：

public void set(final Context context, String urlStr, final Bundle bundle) {		new AsyncTask<String, Void, Bitmap>() {			@Override			protected Bitmap doInBackground(String... params) {				try {					URL url = new URL(params[0]);					HttpURLConnection conn = (HttpURLConnection) url							.openConnection();					conn.setConnectTimeout(6000);// 设置超时					conn.setDoInput(true);					conn.setUseCaches(false);// 不缓存					conn.connect();					int code = conn.getResponseCode();					Bitmap bitmap = null;					if (code == 200) {						InputStream is = conn.getInputStream();// 获得图片的数据流						bitmap = BitmapFactory.decodeStream(is);					}					return bitmap;				} catch (MalformedURLException e) {					e.printStackTrace();					return null;				} catch (IOException e) {					e.printStackTrace();					return null;				}			}			@Override			protected void onPostExecute(Bitmap result) {				super.onPostExecute(result);				if (result != null) {					openNitifNews(context, result, bundle);				}			}		}.execute(urlStr);	}

再来看看openNitifNews方法：

/**	 * 处理推送的逻辑	 * 	 * @param ct	 * @param imgUrl	 * @param bundle	 */	private void openNitifNews(Context ct, Bitmap bitmap, Bundle bundle) {		Context context = ct.getApplicationContext();		NewsBean bean = null;		bean = (NewsBean) bundle.getSerializable("bean");		if(bean == null)		return;		if (TextUtils.isEmpty(bean.getTitle())) {			return;		}		if (TextUtils.isEmpty(bean.getDes())) {			bean.setDes("  ");		}			NotificationManager nm = null;		if (null == nm) {			nm = (NotificationManager) context					.getSystemService(Context.NOTIFICATION_SERVICE);		}				Notification notification = new Notification();		// 采用默认声音		notification.defaults |= Notification.DEFAULT_SOUND;		// 使用默认的灯光		notification.defaults |= Notification.DEFAULT_LIGHTS;		// 通知被点击后，自动消失		notification.flags |= Notification.FLAG_AUTO_CANCEL;		notification.icon = R.drawable.ic_launcher;		// 点击'Clear'时，无法清除通知		// notification.flags |= Notification.FLAG_NO_CLEAR;		// 点击清除按钮不会清除消息通知,可以用来表示在正在运行		// notification.flags |= Notification.FLAG_ONGOING_EVENT;		RemoteViews remoteView = new RemoteViews(context.getPackageName(),				R.layout.notif_news);  //通过自己的布局来显示		remoteView.setImageViewBitmap(R.id.iv_newspush_icon, bitmap);		remoteView.setTextViewText(R.id.tv_newpush_title, bean.getTitle());		remoteView.setTextViewText(R.id.tv_newpush_des, bean.getDes());		Intent appIntent = new Intent(ct, NewsDetailsActivity.class);		appIntent.putExtra("article_type", bean.getTypeId());		appIntent.putExtra("News_ID", bean.getID());		appIntent.putExtra("HEADTITLE", bean.getHeadTitle());		PendingIntent contentIntent = PendingIntent.getActivity(ct, 0, appIntent,				PendingIntent.FLAG_UPDATE_CURRENT);<span style="white-space:pre">	</span>

<span style="white-space:pre">		</span>// remoteView.setOnClickPendingIntent(R.id.ll_newpush_root,<span style="white-space:pre">		</span>// contentIntent);  //如果在这里设置点击事件，不会消失，根据需求来。。		notification.contentView = remoteView; 		notification.contentIntent = contentIntent; 		nm.notify(MySmsReceiver.NEWSPUAH, notification);	}