开源中国客户端源码阅读笔记

1、 <include layout="@layout/main_header" /> <net.oschina.app.widget.ScrollLayout android:id="@+id/main_scrolllayout" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1"> <include layout="@layout/frame_news" /> <include layout="@layout/frame_question" /> <include layout="@layout/frame_tweet" /> <include layout="@layout/frame_active" /> net.oschina.app.widget.ScrollLayout> <include layout="@layout/main_footer" /> 通过include其他的layout拆分了设计是如何在自定义控件里又包含了其他的layout？ android:layout_weight="1" 的作用是指定控件所占空间的权重，默认为0，即为怎么设定怎么显示而设为1说明是平摊控件，这样两个android:layout_width="fill_parent" 的控件会左右各占一半空间 2. <Button android:id="@+id/frame_btn_news_lastest" style="@style/frame_button" android:text="@string/frame_title_news_lastest"/> <style name="frame_button"> <item name="android:layout_width">fill_parentitem> <item name="android:layout_height">fill_parentitem> <item name="android:layout_weight">1item> <item name="android:background">@drawable/frame_button_bgitem> <item name="android:textColor">@color/frame_button_text_lightitem> style> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_enabled="true" android:drawable="@drawable/frame_button_n" /> <item android:state_enabled="false" android:drawable="@drawable/frame_button_p" /> selector> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_enabled="true" android:color="@color/frame_button_text_nor" /> <item android:state_enabled="false" android:color="@color/frame_button_text_select" /> <item android:color="@color/frame_button_text_nor" /> selector> 对用一些多次重用的属性（比如在一组按钮中），可以设为一个style供调用style="@style/frame_button" ，按钮的背景可以设置为一个selector，使其在不同的状态下有不同的图像，文字的颜色也可以这样 3. <ImageView android:layout_width="wrap_content" android:layout_height="fill_parent" android:background="@drawable/frame_button_cutline"/> 仿TAB按钮之间的分隔效果是通过贴图实现的 4，工具栏的TAB效果是用按钮模拟出来的（这里用RadioButton不知道有何深意，但是却没用RadioButtonGroup）通过数组来操作，统一操作 /** * 初始化水平滚动翻页 */ private void initPageScroll() { mScrollLayout = (ScrollLayout) findViewById(R.id.main_scrolllayout); LinearLayout linearLayout = (LinearLayout) findViewById(R.id.main_linearlayout_footer); mHeadTitles = getResources().getStringArray(R.array.head_titles); mViewCount = mScrollLayout.getChildCount(); mButtons = new RadioButton[mViewCount]; for(int i = 0; i < mViewCount; i++) { mButtons[i] = (RadioButton) linearLayout.getChildAt(i*2); 获取底部工具栏的单选按钮，存入数组中，所以通过private RadioButton fbNews一直无法找到处理操作的函数） mButtons[i].setTag(i); mButtons[i].setChecked(false); mButtons[i].setOnClickListener(new View.OnClickListener() { public void onClick(View v) { int pos = (Integer)(v.getTag()); //点击当前项刷新 if(mCurSel == pos) { switch (pos) { case 0://资讯+博客 if(lvNews.getVisibility() == View.VISIBLE) lvNews.clickRefresh(); else lvBlog.clickRefresh(); break; case 1://问答 lvQuestion.clickRefresh(); break; case 2://动弹 lvTweet.clickRefresh(); break; case 3://动态+留言 if(lvActive.getVisibility() == View.VISIBLE) lvActive.clickRefresh(); else lvMsg.clickRefresh(); break; } } mScrollLayout.snapToScreen(pos); } }); } //设置第一显示屏 mCurSel = 0; mButtons[mCurSel].setChecked(true); mScrollLayout.SetOnViewChangeListener(new ScrollLayout.OnViewChangeListener() { public void OnViewChange(int viewIndex) { //切换列表视图-如果列表数据为空：加载数据 switch (viewIndex) { case 0://资讯 if(lvNews.getVisibility() == View.VISIBLE) { if(lvNewsData.isEmpty()) { loadLvNewsData(curNewsCatalog, 0, lvNewsHandler, UIHelper.LISTVIEW_ACTION_INIT); } } else { if(lvBlogData.isEmpty()) { loadLvBlogData(curNewsCatalog, 0, lvBlogHandler, UIHelper.LISTVIEW_ACTION_INIT); } } break; case 1://问答 if(lvQuestionData.isEmpty()) { loadLvQuestionData(curQuestionCatalog, 0, lvQuestionHandler, UIHelper.LISTVIEW_ACTION_INIT); } break; case 2://动弹 if(lvTweetData.isEmpty()) { loadLvTweetData(curTweetCatalog, 0, lvTweetHandler, UIHelper.LISTVIEW_ACTION_INIT); } break; case 3://动态 //判断登录 if(!appContext.isLogin()){ if(lvActive.getVisibility()==View.VISIBLE && lvActiveData.isEmpty()){ lvActive_foot_more.setText(R.string.load_empty); lvActive_foot_progress.setVisibility(View.GONE); }else if(lvMsg.getVisibility()==View.VISIBLE && lvMsgData.isEmpty()){ lvMsg_foot_more.setText(R.string.load_empty); lvMsg_foot_progress.setVisibility(View.GONE); } UIHelper.showLoginDialog(Main.this); break; } //处理通知信息 if(bv_atme.isShown()) frameActiveBtnOnClick(framebtn_Active_atme, ActiveList.CATALOG_ATME, UIHelper.LISTVIEW_ACTION_REFRESH); else if(bv_review.isShown()) frameActiveBtnOnClick(framebtn_Active_comment, ActiveList.CATALOG_COMMENT, UIHelper.LISTVIEW_ACTION_REFRESH); else if(bv_message.isShown()) frameActiveBtnOnClick(framebtn_Active_message, 0, UIHelper.LISTVIEW_ACTION_REFRESH); else if(lvActive.getVisibility() == View.VISIBLE && lvActiveData.isEmpty()) loadLvActiveData(curActiveCatalog, 0, lvActiveHandler, UIHelper.LISTVIEW_ACTION_INIT); else if(lvMsg.getVisibility() == View.VISIBLE && lvMsgData.isEmpty()) loadLvMsgData(0, lvMsgHandler, UIHelper.LISTVIEW_ACTION_INIT); break; } setCurPoint(viewIndex); } }); } /** * 设置底部栏当前焦点 * @param index */ private void setCurPoint(int index) { if (index < 0 || index > mViewCount - 1 || mCurSel == index) return; mButtons[mCurSel].setChecked(false); mButtons[index].setChecked(true); mHeadTitle.setText(mHeadTitles[index]); mCurSel = index; mHead_search.setVisibility(View.GONE); mHeadPub_post.setVisibility(View.GONE); mHeadPub_tweet.setVisibility(View.GONE); //头部logo、发帖、发动弹按钮显示 if(index == 0){ mHeadLogo.setImageResource(R.drawable.frame_logo_news); mHead_search.setVisibility(View.VISIBLE); } else if(index == 1){ mHeadLogo.setImageResource(R.drawable.frame_logo_post); mHeadPub_post.setVisibility(View.VISIBLE); } else if(index == 2){ mHeadLogo.setImageResource(R.drawable.frame_logo_tweet); mHeadPub_tweet.setVisibility(View.VISIBLE); } else if(index == 3){ mHeadLogo.setImageResource(R.drawable.frame_logo_active); mHeadPub_tweet.setVisibility(View.VISIBLE); } } 。

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