腾讯微博教程分步走之第二步(含原码)
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要实现功能例图
首先看布局
<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" > <LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ffffffff" android:orientation="vertical" > <ListView android:id="@id/android:list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:cacheColorHint="#00000000" android:clipToPadding="false" android:divider="@drawable/list_divider" android:fadingEdge="none" android:fastScrollEnabled="false" android:paddingBottom="50.0dip" android:paddingTop="45.0dip" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:paddingTop="15.0dip" android:text="" android:textColor="#ff5a5a5a" android:textSize="20.0sp" android:visibility="invisible" /> </LinearLayout> <include android:id="@+id/home_top" android:layout_width="fill_parent" android:layout_height="wrap_content" layout="@layout/top_panel" /> </FrameLayout>
其实就是一个 tabhost
再看看具体到每一项的显示的布局
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@drawable/listitem_selector" android:orientation="horizontal" android:paddingTop="3.0dip" > <RelativeLayout android:layout_width="50.0dip" android:layout_height="50.0dip" android:layout_weight="0.0" > <ImageView android:id="@+id/home_headicon" android:layout_width="45.0dip" android:layout_height="45.0dip" android:layout_centerInParent="true" android:scaleType="fitCenter" /> </RelativeLayout> <RelativeLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1.0" android:orientation="vertical" android:padding="4.0dip" > <TextView android:id="@+id/home_nick" android:layout_width="wrap_content" android:layout_height="32.0dip" android:layout_alignParentLeft="true" android:textColor="#000000" android:textSize="14.0sp" /> <ImageView android:id="@+id/home_vip" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toRightOf="@id/home_nick" android:src="@drawable/vip" /> <TextView android:id="@+id/home_timestamp" android:layout_width="wrap_content" android:layout_height="32.0dip" android:layout_alignParentRight="true" android:textColor="#ff000000" android:textSize="8.0sp" /> <ImageView android:id="@+id/home_hasimage" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toLeftOf="@id/home_timestamp" /> <TextView android:id="@+id/home_origtext" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/home_nick" android:textColor="#081008" android:textSize="12.0sp" /> <TextView android:id="@+id/home_source" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_below="@id/home_origtext" android:layout_marginLeft="6.0dip" android:textColor="#101810" android:textSize="10.0sp" /> </RelativeLayout> </LinearLayout>
这种布局只要多试几次实现起来是没有难度的
再看实现代码
package com.android.caigang.view; import java.util.ArrayList; import java.util.List; import java.util.concurrent.Executor; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.regex.Pattern; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.app.Activity; import android.app.AlertDialog; import android.app.ListActivity; import android.app.ProgressDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.text.SpannableString; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.BaseAdapter; import android.widget.Button; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import com.android.caigang.R; import com.android.caigang.db.DataHelper; import com.android.caigang.model.UserInfo; import com.android.caigang.util.AsyncImageLoader; import com.android.caigang.util.AsyncImageLoader.ImageCallback; import com.android.caigang.util.DataBaseContext; import com.android.caigang.util.RegexUtil; import com.android.caigang.util.TextUtil; import com.android.caigang.util.TimeUtil; import com.android.caigang.util.WeiboContext; import com.mime.qweibo.examples.MyWeiboSync; import com.mime.qweibo.examples.QWeiboType.PageFlag; public class HomeTimeLineActivity extends ListActivity implements OnItemClickListener,OnItemLongClickListener{ private DataHelper dataHelper; private UserInfo user; private MyWeiboSync weibo; private ListView listView; private HomeAdapter adapter; private JSONArray array; private AsyncImageLoader asyncImageLoader; private Handler handler; private ProgressDialog progressDialog; private View top_panel; private Button top_btn_left; private Button top_btn_right; private TextView top_title; private LinearLayout list_footer; private TextView tv_msg; private LinearLayout loading; private List<JSONObject> list;//微博数据列表 private ExecutorService executorService; private static int PAGE_SIZE = 20;//每页显示的微博条数 private int TOTAL_PAGE = 0;//当前已经记在的微博页数 private static int THREADPOOL_SIZE = 4;//线程池的大小 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.home); setUpViews(); setUpListeners(); dataHelper = DataBaseContext.getInstance(getApplicationContext()); weibo = WeiboContext.getInstance(); List<UserInfo> userList = dataHelper.GetUserList(false); SharedPreferences preferences = getSharedPreferences("default_user",Activity.MODE_PRIVATE); String nick = preferences.getString("user_default_nick", "");//取得默认账号信息 if (nick != "") { user = dataHelper.getUserByName(nick,userList); top_title.setText(nick);//顶部工具栏昵称 } weibo.setAccessTokenKey(user.getToken()); weibo.setAccessTokenSecrect(user.getTokenSecret()); progressDialog = new ProgressDialog(HomeTimeLineActivity.this);// 生成一个进度条 progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); progressDialog.setTitle("请稍等"); progressDialog.setMessage("正在读取数据中!"); handler = new GetHomeTimeLineHandler(); executorService.submit(new GetHomeTimeLineThread());//耗时操作,开启一个新线程获取数据 progressDialog.show(); } private void setUpViews(){ list_footer = (LinearLayout)LayoutInflater.from(HomeTimeLineActivity.this).inflate(R.layout.list_footer, null); tv_msg = (TextView)list_footer.findViewById(R.id.tv_msg); loading = (LinearLayout)list_footer.findViewById(R.id.loading); listView = getListView(); top_panel = (View)findViewById(R.id.home_top); top_btn_left = (Button)top_panel.findViewById(R.id.top_btn_left); top_btn_right = (Button)top_panel.findViewById(R.id.top_btn_right); top_title = (TextView)top_panel.findViewById(R.id.top_title); listView.addFooterView(list_footer);//这儿是关键中的关键呀，利用FooterVIew分页动态加载 list = new ArrayList<JSONObject>(); executorService = Executors.newFixedThreadPool(THREADPOOL_SIZE); } private void setUpListeners(){ listView.setOnItemClickListener(this); listView.setOnItemLongClickListener(this); top_btn_right.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(HomeTimeLineActivity.this,AddWeiboActivity.class); intent.putExtra("tip", "写广播"); intent.putExtra("content", ""); intent.putExtra("from_flag", "write"); startActivity(intent); } }); tv_msg.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //Toast.makeText(HomeTimeLineActivity.this, "我将消失了", Toast.LENGTH_SHORT).show(); executorService.submit(new GetHomeTimeLineThread()); tv_msg.setVisibility(View.GONE);//隐藏更多提示的TextView loading.setVisibility(View.VISIBLE);//显示最下方的进度条 } }); } class GetHomeTimeLineHandler extends Handler { @Override public void handleMessage(Message msg) { adapter = new HomeAdapter(HomeTimeLineActivity.this, list); if(TOTAL_PAGE>1){ adapter.notifyDataSetChanged(); } if(TOTAL_PAGE==1){ listView.setAdapter(adapter); } listView.setSelection((TOTAL_PAGE-1)*PAGE_SIZE+1);//设置最新获取一页数据成功后显示数据的起始数据 progressDialog.dismiss();// 关闭进度条 loading.setVisibility(View.GONE);//隐藏下方的进度条 tv_msg.setVisibility(View.VISIBLE);//显示出更多提示TextView } } class GetHomeTimeLineThread implements Runnable{ @Override public void run() { refreshList(); Message msg = handler.obtainMessage();//通知线程来处理范围的数据 handler.sendMessage(msg); } } private void refreshList(){ String jsonStr = weibo.getHomeMsg(weibo.getAccessTokenKey(), weibo.getAccessTokenSecrect(), PageFlag.PageFlag_First, (TOTAL_PAGE+1)*PAGE_SIZE); try { JSONObject dataObj = new JSONObject(jsonStr).getJSONObject("data"); array = dataObj.getJSONArray("info"); if(array!=null&&array.length()>0){ TOTAL_PAGE++; list.clear(); int lenth =array.length(); for(int i = 0;i<lenth;i++){ list.add(array.optJSONObject(i)); } } } catch (JSONException e) { e.printStackTrace(); } } class HomeAdapter extends BaseAdapter { private Context context; private LayoutInflater inflater; private List<JSONObject> list; public HomeAdapter(Context context, List<JSONObject> list) { super(); this.context = context; this.list = list; this.inflater = LayoutInflater.from(context); } @Override public int getCount() { return list.size(); } @Override public Object getItem(int position) { return list.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(final int position, View convertView, ViewGroup parent) { asyncImageLoader = new AsyncImageLoader(); HomeViewHolder viewHolder = new HomeViewHolder(); JSONObject data = (JSONObject)list.get(position); JSONObject source = null; convertView = inflater.inflate(R.layout.home_list_item, null); viewHolder.home_headicon = (ImageView) convertView.findViewById(R.id.home_headicon); viewHolder.home_nick = (TextView) convertView.findViewById(R.id.home_nick); viewHolder.home_vip = (ImageView) convertView.findViewById(R.id.home_vip); viewHolder.home_hasimage = (ImageView) convertView.findViewById(R.id.home_hasimage); viewHolder.home_timestamp = (TextView) convertView.findViewById(R.id.home_timestamp); viewHolder.home_origtext = (TextView) convertView.findViewById(R.id.home_origtext); viewHolder.home_source = (TextView) convertView.findViewById(R.id.home_source); if(data!=null){ try { convertView.setTag(data.get("id")); //viewHolder.home_headicon.setImageDrawable(ImageUtil.getDrawableFromUrl(data.getString("head")+"/100"));//同步加载图片 viewHolder.home_nick.setText(data.getString("nick")); if(data.getInt("isvip")!=1){ viewHolder.home_vip.setVisibility(View.GONE);//非vip隐藏vip标志 } viewHolder.home_timestamp.setText(TimeUtil.converTime(Long.parseLong(data.getString("timestamp")))); //异步加载图片 Drawable cachedImage = asyncImageLoader.loadDrawable(data.getString("head")+"/100",viewHolder.home_headicon, new ImageCallback(){ @Override public void imageLoaded(Drawable imageDrawable,ImageView imageView, String imageUrl) { imageView.setImageDrawable(imageDrawable); } }); if (cachedImage == null) { viewHolder.home_headicon.setImageResource(R.drawable.icon); } else { viewHolder.home_headicon.setImageDrawable(cachedImage); } if(!"null".equals(data.getString("image"))){ viewHolder.home_hasimage.setImageResource(R.drawable.hasimage); } //微博内容开始 String origtext = data.getString("origtext"); SpannableString spannable = new SpannableString(origtext); /*spannable = TextUtil.decorateFaceInStr(spannable, RegexUtil.getStartAndEndIndex(data.getString("origtext"), Pattern.compile("\\/[\u4e00-\u9fa5a-zA-Z]{1,3}")), getResources());//解析成本地表情 spannable = TextUtil.decorateRefersInStr(spannable, RegexUtil.getStartAndEndIndex(origtext, Pattern.compile("@.*:")), getResources());//高亮显示微薄转发，回复者昵称 spannable = TextUtil.decorateTopicInStr(spannable, RegexUtil.getStartAndEndIndex(origtext, Pattern.compile("#.*#")), getResources());//高亮显示话题名称 spannable = TextUtil.decorateTopicInStr(spannable, RegexUtil.getStartAndEndIndex(origtext, Pattern.compile("^http://\\w+(\\.\\w+|)+(/\\w+)*(/\\w+\\.(\\w+|))?")), getResources());//高亮显示url地址 */ viewHolder.home_origtext.setText(spannable); //微博内容设置结束 //处理引用的转播，评论的微博内容 try { if(!"null".equals(data.getString("source"))){ source = data.getJSONObject("source"); } } catch (JSONException e1) { e1.printStackTrace(); } if(source!=null){ String home_source_text = null; boolean isvip = source.getInt("isvip")==1?true:false; if(isvip){ home_source_text = "@"+source.getString("nick")+"======:"+source.getString("origtext");//用6个连续的=号来替换vip标志图标 }else{ home_source_text = "@"+source.getString("nick")+":"+source.getString("origtext"); } SpannableString spannableSource = new SpannableString(home_source_text); spannableSource = TextUtil.decorateRefersInStr(spannableSource, RegexUtil.getStartAndEndIndex(home_source_text, Pattern.compile("@.*:")), getResources()); spannableSource = TextUtil.decorateTopicInStr(spannableSource, RegexUtil.getStartAndEndIndex(home_source_text, Pattern.compile("#.*#")), getResources()); spannableSource = TextUtil.decorateTopicInStr(spannableSource, RegexUtil.getStartAndEndIndex(home_source_text, Pattern.compile("^http://\\w+(\\.\\w+|)+(/\\w+)*(/\\w+\\.(\\w+|))?")), getResources()); if(isvip){ spannableSource = TextUtil.decorateVipInStr(spannableSource, RegexUtil.getStartAndEndIndex(home_source_text, Pattern.compile("======")), getResources());//替换为vip认证图片 } viewHolder.home_source.setText(spannableSource); viewHolder.home_source.setBackgroundResource(R.drawable.home_source_bg); } } catch (JSONException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } return convertView; } } static class HomeViewHolder { private ImageView home_headicon; private TextView home_nick; private ImageView home_vip; private TextView home_timestamp; private TextView home_origtext; private TextView home_source; private ImageView home_hasimage; } @Override public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int position,long arg3) { CharSequence [] items = null; try { items= new CharSequence[]{"转播","对话","点评","收藏",((JSONObject)array.opt(position)).getString("nick"),"取消"}; } catch (JSONException e) { e.printStackTrace(); } new AlertDialog.Builder(HomeTimeLineActivity.this).setTitle("选项").setItems(items,new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { switch (which) { case 0: { } break; case 1: { } break; case 2: { } break; case 3: { } break; case 4: { } break; case 5: { } break; default: break; } } }).show(); return false; } @Override public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { JSONObject weiboInfo = (JSONObject)array.opt(position); Intent intent = new Intent(HomeTimeLineActivity.this, WeiboDetailActivity.class); try { intent.putExtra("weiboid", weiboInfo.getString("id")); startActivity(intent); } catch (JSONException e) { e.printStackTrace(); } } @Override public boolean onCreateOptionsMenu(Menu menu){ super.onCreateOptionsMenu(menu); MenuInflater menuInflater = getMenuInflater(); menuInflater.inflate(R.menu.home_timeline_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_settings: { } break; case R.id.menu_official: { } break; case R.id.menu_feedback: { } break; case R.id.menu_account: { Intent intent = new Intent(HomeTimeLineActivity.this, AccountActivity.class); startActivity(intent); } break; case R.id.menu_about: { Intent intent = new Intent(HomeTimeLineActivity.this, AddWeiboActivity.class); startActivity(intent); } break; case R.id.menu_quit: { } break; default: break; } return true; } }
异步加载图片类
package com.android.caigang.util; import java.io.IOException; import java.io.InputStream; import java.lang.ref.SoftReference; import java.net.MalformedURLException; import java.net.URL; import java.util.HashMap; import android.graphics.drawable.Drawable; import android.os.Handler; import android.os.Message; import android.widget.ImageView; public class AsyncImageLoader { //SoftReference�������ã���Ϊ�˸�õ�Ϊ��ϵͳ���ձ��� private HashMap<String, SoftReference<Drawable>> imageCache; public AsyncImageLoader() { imageCache = new HashMap<String, SoftReference<Drawable>>(); } public Drawable loadDrawable(final String imageUrl,final ImageView imageView, final ImageCallback imageCallback){ if (imageCache.containsKey(imageUrl)) { //�ӻ����л�ȡ SoftReference<Drawable> softReference = imageCache.get(imageUrl); Drawable drawable = softReference.get(); if (drawable != null) { return drawable; } } final Handler handler = new Handler() { public void handleMessage(Message message) { imageCallback.imageLoaded((Drawable) message.obj, imageView,imageUrl); } }; //������һ���µ��߳�����ͼƬ new Thread() { @Override public void run() { Drawable drawable = null; try { drawable = ImageUtil.geRoundDrawableFromUrl(imageUrl, 20); } catch (Exception e) { e.printStackTrace(); } imageCache.put(imageUrl, new SoftReference<Drawable>(drawable)); Message message = handler.obtainMessage(0, drawable); handler.sendMessage(message); } }.start(); return null; } //�ص��ӿ� public interface ImageCallback { public void imageLoaded(Drawable imageDrawable,ImageView imageView, String imageUrl); } }
相关实现如上 大家也多多思考一下 都不难