Android开源中国客户端学习 消息模块

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/**
* 轮询通知信息
*/
private void foreachUserNotice() {
final int uid = appContext.getLoginUid();
final Handler handler = new Handler() {
public void handleMessage(Message msg) {
if (msg.what == 1) {
UIHelper.sendBroadCast(Main.this, (Notice) msg.obj);
}
foreachUserNotice();// 回调
}
};
new Thread() {
public void run() {
Message msg = new Message();
try {
sleep(60 * 1000);
if (uid > 0) {
Notice notice = appContext.getUserNotice(uid);
msg.what = 1;
msg.obj = notice;
} else {
msg.what = 0;
}
} catch (AppException e) {
e.printStackTrace();
msg.what = -1;
} catch (Exception e) {
e.printStackTrace();
msg.what = -1;
}
handler.sendMessage(msg);
}
}.start();
}

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Message msg = new Message();

这句话最好用hander.obtaiMessage() 或者

Message msg = Message.obtain();

来获取Message 这样可以节约资源浪费

如果有消息更新 就发送广播,这个就是就比较简单了sendBroadCast函数在UIHelper中:

public static void sendBroadCast(Context context, Notice notice) {
if (!((AppContext) context.getApplicationContext()).isLogin()
|| notice == null)
return;
Intent intent = new Intent("net.oschina.app.action.APPWIDGET_UPDATE");
intent.putExtra("atmeCount", notice.getAtmeCount());
intent.putExtra("msgCount", notice.getMsgCount());
intent.putExtra("reviewCount", notice.getReviewCount());
intent.putExtra("newFansCount", notice.getNewFansCount());
context.sendBroadcast(intent);
}

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<receiver android:name=".ui.BroadCast">
<intent-filter>
<action android:name="net.oschina.app.action.APPWIDGET_UPDATE" />
</intent-filter>
</receiver>

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// 注册广播接收器
tweetReceiver = new TweetReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction("net.oschina.app.action.APP_TWEETPUB");
registerReceiver(tweetReceiver, filter);

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UIHelper.sendBroadCastTweet(TweetPub.this, what, res, tweet);

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public static void sendBroadCastTweet(Context context, int what,
Result res, Tweet tweet) {
if (res == null && tweet == null)
return;
Intent intent = new Intent("net.oschina.app.action.APP_TWEETPUB");
intent.putExtra("MSG_WHAT", what);
if (what == 1)
intent.putExtra("RESULT", res);
else
intent.putExtra("TWEET", tweet);
context.sendBroadcast(intent);
}

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if (TweetPub.mContext != null)
UIHelper.showResendTweetDialog(TweetPub.mContext, thread);
else
UIHelper.showResendTweetDialog(context, thread);

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final Handler handler = new Handler() {
public void handleMessage(Message msg) {
if (msg.what == 1) {
Result res = (Result) msg.obj;
UIHelper.ToastMessage(context,res.getErrorMessage(), 1000);
if (res.OK()) {
// 发送通知广播
if (res.getNotice() != null) {
UIHelper.sendBroadCast(context,res.getNotice());
}
// 发完动弹后-刷新最新、我的动弹&最新动态
if (curTweetCatalog >= 0 && mCurSel == 2) {
loadLvTweetData(curTweetCatalog, 0,lvTweetHandler,UIHelper.LISTVIEW_ACTION_REFRESH);
} else if (curActiveCatalog == ActiveList.CATALOG_LASTEST&& mCurSel == 3) {
loadLvActiveData(curActiveCatalog, 0,lvActiveHandler,UIHelper.LISTVIEW_ACTION_REFRESH);
}
if (TweetPub.mContext != null) {
// 清除动弹保存的临时编辑内容
appContext.removeProperty(AppConfig.TEMP_TWEET,AppConfig.TEMP_TWEET_IMAGE);
((Activity) TweetPub.mContext).finish();
}
}
} else {
((AppException) msg.obj).makeToast(context);
if (TweetPub.mContext != null&&TweetPub.mMessage != null)
TweetPub.mMessage.setVisibility(View.GONE);
}
}
};

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NewDataToast
.makeText(
this,
getString(R.string.new_data_toast_message,
newdata), appContext.isAppSound())

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/**
* 新数据Toast提示控件(带音乐播放)
* @author liux (http://my.oschina.net/liux)
* @version 1.0
* @created 2012-8-30
*/
public class NewDataToast extends Toast{

private MediaPlayer mPlayer;
private boolean isSound;

public NewDataToast(Context context) {
this(context, false);
}

public NewDataToast(Context context, boolean isSound) {
super(context);

this.isSound = isSound;

mPlayer = MediaPlayer.create(context, R.raw.newdatatoast);
mPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener(){
@Override
public void onCompletion(MediaPlayer mp) {
mp.release();
}
});

}

@Override
public void show() {
super.show();

if(isSound){
mPlayer.start();
}
}

/**
* 设置是否播放声音
*/
public void setIsSound(boolean isSound) {
this.isSound = isSound;
}

/**
* 获取控件实例
* @param context
* @param text 提示消息
* @param isSound 是否播放声音
* @return
*/
public static NewDataToast makeText(Context context, CharSequence text, boolean isSound) {
NewDataToast result = new NewDataToast(context, isSound);

LayoutInflater inflate = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

DisplayMetrics dm = context.getResources().getDisplayMetrics();

View v = inflate.inflate(R.layout.new_data_toast, null);
v.setMinimumWidth(dm.widthPixels);//设置控件最小宽度为手机屏幕宽度

TextView tv = (TextView)v.findViewById(R.id.new_data_toast_message);
tv.setText(text);

result.setView(v);
result.setDuration(600);
result.setGravity(Gravity.TOP, 0, (int)(dm.density*75));

return result;
}

}