(转摘)Android腾讯菲薄单薄客户端开发十:博主广播篇

Java代码  

1. public class TweetsActivity extends ListActivity implements OnItemClickListener{   
2.     private DataHelper dataHelper;   
3.     private UserInfo user;   
4.     private MyWeiboSync weibo;   
5.     private Handler handler;   
6.     private AsyncImageLoader asyncImageLoader;    
7.     private TweetsThread thread;   
8.     private ListView listView;   
9.     private ProgressDialog progressDialog;   
10.     private JSONArray array;   
11.     private TweetsAdapter adapter;   
12.     private String name;   
13.     private String currentNick;//当前界面的昵称   
14.     private View top_panel;   
15.     private Button top_btn_left;   
16.     private Button top_btn_right;   
17.     private TextView top_title;   
18.        
19.     @Override  
20.     protected void onCreate(Bundle savedInstanceState) {   
21.         super.onCreate(savedInstanceState);   
22.         setContentView(R.layout.tweets);   
23.         setUpViews();//设置view   
24.         setUpListeners();//设置listenter   
25.            
26.         asyncImageLoader = new AsyncImageLoader();   
27.         dataHelper = new DataHelper(TweetsActivity.this);   
28.         weibo = new MyWeiboSync();   
29.         List<UserInfo> userList = dataHelper.GetUserList(false);   
30.            
31.         SharedPreferences preferences = getSharedPreferences("default_user",Activity.MODE_PRIVATE);   
32.         String nick = preferences.getString("user_default_nick", "");   
33.         if (nick != "") {   
34.             user = dataHelper.getUserByName(nick,userList);   
35.         }   
36.            
37.         weibo.setAccessTokenKey(user.getToken());   
38.         weibo.setAccessTokenSecrect(user.getTokenSecret());   
39.            
40.         Intent intent = getIntent();   
41.         name = intent.getStringExtra("name");//获取从前面页面传递过来的数据   
42.         currentNick = intent.getStringExtra("nick");   
43.         top_title.setText(currentNick+"的广播");   
44.            
45.         progressDialog = new ProgressDialog(TweetsActivity.this);// 生成一个进度条   
46.         progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);   
47.         progressDialog.setTitle("请稍等");   
48.         progressDialog.setMessage("正在读取数据中!");   
49.            
50.         handler = new TweetsHandler();   
51.         thread = new TweetsThread();   
52.         thread.start();//开启一个线程获取数据   
53.         progressDialog.show();   
54.            
55.     }   
56.        
57.     private void setUpViews(){   
58.         listView = getListView();   
59.         top_panel = (View)findViewById(R.id.tweets_top);   
60.         top_btn_left = (Button)top_panel.findViewById(R.id.top_btn_left);   
61.         top_btn_right = (Button)top_panel.findViewById(R.id.top_btn_right);   
62.         top_title = (TextView)top_panel.findViewById(R.id.top_title);   
63.     }   
64.        
65.     private void setUpListeners(){   
66.         listView.setOnItemClickListener(this);   
67.     }   
68.        
69.     class TweetsThread extends Thread {   
70.         @Override  
71.         public void run() {   
72.             String jsonStr = weibo.getTweets(weibo.getAccessTokenKey(), weibo.getAccessTokenSecrect(),PageFlag.PageFlag_First, 0, 20, 0,name);   
73.             try {   
74.                 JSONObject dataObj = new JSONObject(jsonStr).getJSONObject("data");    
75.                 array = dataObj.getJSONArray("info");   
76.             } catch (JSONException e) {   
77.                 e.printStackTrace();   
78.             }   
79.             //通知handler处理数据   
80.             Message msg = handler.obtainMessage();   
81.             handler.sendMessage(msg);   
82.         }   
83.     }   
84.        
85.     class TweetsHandler extends Handler {    
86.         @Override  
87.         public void handleMessage(Message msg){   
88.             adapter = new TweetsAdapter(TweetsActivity.this, array);   
89.             listView.setAdapter(adapter);   
90.             progressDialog.dismiss();// 关闭进度条   
91.         }   
92.     }   
93.        
94.     class TweetsAdapter extends BaseAdapter {   
95.         private Context context;   
96.         private LayoutInflater inflater;   
97.         private JSONArray array;   
98.            
99.         public TweetsAdapter(Context context, JSONArray array) {   
100.             super();   
101.             this.context = context;   
102.             this.array = array;   
103.             this.inflater = LayoutInflater.from(context);   
104.         }   
105.   
106.         @Override  
107.         public int getCount() {   
108.             return array.length();   
109.         }   
110.   
111.         @Override  
112.         public Object getItem(int position) {   
113.             return array.opt(position);   
114.         }   
115.   
116.         @Override  
117.         public long getItemId(int position) {   
118.             return position;   
119.         }   
120.   
121.         @Override  
122.         public View getView(final int position, View convertView, ViewGroup parent) {   
123.             asyncImageLoader = new AsyncImageLoader();   
124.             TweetsViewHolder viewHolder = new TweetsViewHolder();   
125.             JSONObject data = (JSONObject)array.opt(position);    
126.             JSONObject source = null;   
127.             convertView = inflater.inflate(R.layout.tweets_list_item, null);   
128.             try {   
129.                 source = data.getJSONObject("source");   
130.             } catch (JSONException e1) {   
131.                 e1.printStackTrace();    
132.             }   
133.             viewHolder.tweets_headicon = (ImageView) convertView.findViewById(R.id.tweets_headicon);   
134.             viewHolder.tweets_nick = (TextView) convertView.findViewById(R.id.tweets_nick);   
135.             viewHolder.tweets_hasimage = (ImageView) convertView.findViewById(R.id.tweets_hasimage);   
136.             viewHolder.tweets_timestamp = (TextView) convertView.findViewById(R.id.tweets_timestamp);   
137.             viewHolder.tweets_origtext = (TextView) convertView.findViewById(R.id.tweets_origtext);   
138.             viewHolder.tweets_source = (TextView) convertView.findViewById(R.id.tweets_source);   
139.                
140.             if(data!=null){   
141.                 try {   
142.                     convertView.setTag(data.get("id"));   
143.                     viewHolder.tweets_nick.setText(data.getString("nick"));   
144.                     viewHolder.tweets_timestamp.setText(TimeUtil.converTime(Long.parseLong(data.getString("timestamp"))));   
145.                     viewHolder.tweets_origtext.setText(data.getString("origtext"), TextView.BufferType.SPANNABLE);   
146.                        
147.                     if(source!=null){   
148.                         viewHolder.tweets_source.setText(source.getString("origtext"));   
149.                         viewHolder.tweets_source.setBackgroundResource(R.drawable.source_bg);   
150.                     }   
151.                     //异步加载图片   
152.                     Drawable cachedImage = asyncImageLoader.loadDrawable(data.getString("head")+"/100",viewHolder.tweets_headicon, new ImageCallback(){   
153.                         @Override  
154.                         public void imageLoaded(Drawable imageDrawable,ImageView imageView, String imageUrl) {   
155.                             imageView.setImageDrawable(imageDrawable);   
156.                         }   
157.                     });   
158.                     if (cachedImage == null) {   
159.                         viewHolder.tweets_headicon.setImageResource(R.drawable.icon);   
160.                     } else {   
161.                         viewHolder.tweets_headicon.setImageDrawable(cachedImage);   
162.                     }   
163.                     if(data.getJSONArray("image")!=null){   
164.                         viewHolder.tweets_hasimage.setImageResource(R.drawable.hasimage);   
165.                     }   
166.                 } catch (JSONException e) {   
167.                     e.printStackTrace();   
168.                 } catch (Exception e) {   
169.                     e.printStackTrace();   
170.                 }   
171.             }   
172.             return convertView;   
173.         }   
174.     }   
175.        
176.     static class TweetsViewHolder {   
177.         private ImageView tweets_headicon;   
178.         private TextView tweets_nick;   
179.         private TextView tweets_timestamp;   
180.         private TextView tweets_origtext;   
181.         private TextView tweets_source;   
182.         private ImageView tweets_hasimage;   
183.     }   
184.        
185.     @Override  
186.     public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {   
187.         JSONObject weiboInfo = (JSONObject)array.opt(position);   
188.         Intent intent = new Intent(TweetsActivity.this, WeiboDetailActivity.class);   
189.         try {   
190.             intent.putExtra("weiboid", weiboInfo.getString("id"));   
191.             startActivity(intent);   
192.         } catch (JSONException e) {   
193.             e.printStackTrace();   
194.         }   
195.     }   
196. }  

public class TweetsActivity extends ListActivity implements OnItemClickListener{
	private DataHelper dataHelper;
	private UserInfo user;
	private MyWeiboSync weibo;
	private Handler handler;
	private AsyncImageLoader asyncImageLoader; 
	private TweetsThread thread;
	private ListView listView;
	private ProgressDialog progressDialog;
	private JSONArray array;
	private TweetsAdapter adapter;
	private String name;
	private String currentNick;//当前界面的昵称
	private View top_panel;
	private Button top_btn_left;
	private Button top_btn_right;
	private TextView top_title;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.tweets);
		setUpViews();//设置view
		setUpListeners();//设置listenter
		
		asyncImageLoader = new AsyncImageLoader();
		dataHelper = new DataHelper(TweetsActivity.this);
		weibo = new MyWeiboSync();
		List<UserInfo> userList = dataHelper.GetUserList(false);
		
		SharedPreferences preferences = getSharedPreferences("default_user",Activity.MODE_PRIVATE);
		String nick = preferences.getString("user_default_nick", "");
		if (nick != "") {
			user = dataHelper.getUserByName(nick,userList);
		}
		
		weibo.setAccessTokenKey(user.getToken());
		weibo.setAccessTokenSecrect(user.getTokenSecret());
		
		Intent intent = getIntent();
		name = intent.getStringExtra("name");//获取从前面页面传递过来的数据
		currentNick = intent.getStringExtra("nick");
		top_title.setText(currentNick+"的广播");
		
		progressDialog = new ProgressDialog(TweetsActivity.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 TweetsHandler();
		thread = new TweetsThread();
		thread.start();//开启一个线程获取数据
		progressDialog.show();
		
	}
	
	private void setUpViews(){
		listView = getListView();
		top_panel = (View)findViewById(R.id.tweets_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);
	}
	
	private void setUpListeners(){
		listView.setOnItemClickListener(this);
	}
	
	class TweetsThread extends Thread {
		@Override
		public void run() {
			String jsonStr = weibo.getTweets(weibo.getAccessTokenKey(), weibo.getAccessTokenSecrect(),PageFlag.PageFlag_First, 0, 20, 0,name);
			try {
				JSONObject dataObj = new JSONObject(jsonStr).getJSONObject("data"); 
				array = dataObj.getJSONArray("info");
			} catch (JSONException e) {
				e.printStackTrace();
			}
			//通知handler处理数据
			Message msg = handler.obtainMessage();
			handler.sendMessage(msg);
		}
	}
	
	class TweetsHandler extends Handler { 
		@Override
		public void handleMessage(Message msg){
			adapter = new TweetsAdapter(TweetsActivity.this, array);
			listView.setAdapter(adapter);
			progressDialog.dismiss();// 关闭进度条
		}
	}
	
	class TweetsAdapter extends BaseAdapter {
		private Context context;
		private LayoutInflater inflater;
		private JSONArray array;
		
		public TweetsAdapter(Context context, JSONArray array) {
			super();
			this.context = context;
			this.array = array;
			this.inflater = LayoutInflater.from(context);
		}

		@Override
		public int getCount() {
			return array.length();
		}

		@Override
		public Object getItem(int position) {
			return array.opt(position);
		}

		@Override
		public long getItemId(int position) {
			return position;
		}

		@Override
		public View getView(final int position, View convertView, ViewGroup parent) {
			asyncImageLoader = new AsyncImageLoader();
			TweetsViewHolder viewHolder = new TweetsViewHolder();
			JSONObject data = (JSONObject)array.opt(position); 
			JSONObject source = null;
			convertView = inflater.inflate(R.layout.tweets_list_item, null);
			try {
				source = data.getJSONObject("source");
			} catch (JSONException e1) {
				e1.printStackTrace(); 
			}
			viewHolder.tweets_headicon = (ImageView) convertView.findViewById(R.id.tweets_headicon);
			viewHolder.tweets_nick = (TextView) convertView.findViewById(R.id.tweets_nick);
			viewHolder.tweets_hasimage = (ImageView) convertView.findViewById(R.id.tweets_hasimage);
			viewHolder.tweets_timestamp = (TextView) convertView.findViewById(R.id.tweets_timestamp);
			viewHolder.tweets_origtext = (TextView) convertView.findViewById(R.id.tweets_origtext);
			viewHolder.tweets_source = (TextView) convertView.findViewById(R.id.tweets_source);
			
			if(data!=null){
				try {
					convertView.setTag(data.get("id"));
					viewHolder.tweets_nick.setText(data.getString("nick"));
					viewHolder.tweets_timestamp.setText(TimeUtil.converTime(Long.parseLong(data.getString("timestamp"))));
					viewHolder.tweets_origtext.setText(data.getString("origtext"), TextView.BufferType.SPANNABLE);
					
					if(source!=null){
						viewHolder.tweets_source.setText(source.getString("origtext"));
						viewHolder.tweets_source.setBackgroundResource(R.drawable.source_bg);
					}
					//异步加载图片
					Drawable cachedImage = asyncImageLoader.loadDrawable(data.getString("head")+"/100",viewHolder.tweets_headicon, new ImageCallback(){
	                    @Override
	                    public void imageLoaded(Drawable imageDrawable,ImageView imageView, String imageUrl) {
	                        imageView.setImageDrawable(imageDrawable);
	                    }
	                });
					if (cachedImage == null) {
						viewHolder.tweets_headicon.setImageResource(R.drawable.icon);
					} else {
						viewHolder.tweets_headicon.setImageDrawable(cachedImage);
					}
					if(data.getJSONArray("image")!=null){
						viewHolder.tweets_hasimage.setImageResource(R.drawable.hasimage);
					}
				} catch (JSONException e) {
					e.printStackTrace();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
			return convertView;
		}
	}
	
	static class TweetsViewHolder {
		private ImageView tweets_headicon;
		private TextView tweets_nick;
		private TextView tweets_timestamp;
		private TextView tweets_origtext;
		private TextView tweets_source;
		private ImageView tweets_hasimage;
	}
	
	@Override
	public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
		JSONObject weiboInfo = (JSONObject)array.opt(position);
		Intent intent = new Intent(TweetsActivity.this, WeiboDetailActivity.class);
		try {
			intent.putExtra("weiboid", weiboInfo.getString("id"));
			startActivity(intent);
		} catch (JSONException e) {
			e.printStackTrace();
		}
	}
}

Java代码  

1. <?xml version="1.0" encoding="utf-8"?>   
2. <RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ffffffff"  
3.     xmlns:android="http://schemas.android.com/apk/res/android">   
4.     <include android:id="@+id/tweets_top" layout="@layout/top_panel" android:layout_alignParentTop="true"/>   
5.     <ListView android:id="@id/android:list" android:layout_below="@id/tweets_top" android:layout_width="fill_parent" android:cacheColorHint="#00000000"  
6.         android:layout_height="wrap_content" android:layout_weight="1" android:divider="@drawable/list_divider"/>   
7.     <RelativeLayout android:layout_width="fill_parent" android:layout_height="40.0dip" android:layout_alignParentBottom="true">   
8.         <Button android:id="@+id/mytweet_back_btn" android:layout_width="40.0dip" android:drawableTop="@drawable/btn_back_selector" android:background="@drawable/bottom_back_bg"  
9.             android:layout_height="40.0dip"  android:layout_alignParentLeft="true"/>   
10.         <Button android:id="@+id/mytweet_tohome_btn" android:layout_width="40.0dip"  
11.             android:layout_height="40.0dip" android:drawableTop="@drawable/btn_home_selector" android:background="@drawable/bottom_home_bg" android:layout_alignParentRight="true"/>   
12.     </RelativeLayout>   
13. </RelativeLayout>  

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ffffffff"
	xmlns:android="http://schemas.android.com/apk/res/android">
	<include android:id="@+id/tweets_top" layout="@layout/top_panel" android:layout_alignParentTop="true"/>
	<ListView android:id="@id/android:list" android:layout_below="@id/tweets_top" android:layout_width="fill_parent" android:cacheColorHint="#00000000"
		android:layout_height="wrap_content" android:layout_weight="1" android:divider="@drawable/list_divider"/>
	<RelativeLayout android:layout_width="fill_parent" android:layout_height="40.0dip" android:layout_alignParentBottom="true">
		<Button android:id="@+id/mytweet_back_btn" android:layout_width="40.0dip" android:drawableTop="@drawable/btn_back_selector" android:background="@drawable/bottom_back_bg"
			android:layout_height="40.0dip"  android:layout_alignParentLeft="true"/>
		<Button android:id="@+id/mytweet_tohome_btn" android:layout_width="40.0dip"
			android:layout_height="40.0dip" android:drawableTop="@drawable/btn_home_selector" android:background="@drawable/bottom_home_bg" android:layout_alignParentRight="true"/>
	</RelativeLayout>
</RelativeLayout>

Java代码  

1. <?xml version="1.0" encoding="utf-8"?>   
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:paddingTop="3.0dip" android:orientation="horizontal" android:background="@drawable/listitem_selector"  android:layout_width="fill_parent" android:layout_height="wrap_content">   
3.     <RelativeLayout android:layout_width="50.0dip" android:layout_height="50.0dip" android:layout_weight="0.0">   
4.         <ImageView android:id="@+id/tweets_headicon" android:layout_width="45.0dip" android:layout_height="45.0dip" android:scaleType="fitCenter" android:layout_centerInParent="true" />   
5.     </RelativeLayout>   
6.     <RelativeLayout android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="4.0dip" android:layout_weight="1.0">   
7.         <TextView android:id="@+id/tweets_nick" android:textColor="#000000" android:layout_width="wrap_content" android:layout_height="32.0dip" android:textSize="14.0sp" android:layout_alignParentLeft="true"/>   
8.         <TextView android:id="@+id/tweets_timestamp" android:textColor="#ff000000" android:layout_width="wrap_content" android:layout_height="32.0dip" android:textSize="8.0sp" android:layout_alignParentRight="true"/>   
9.         <ImageView android:id="@+id/tweets_hasimage" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toLeftOf="@id/tweets_timestamp"/>   
10.         <TextView android:id="@+id/tweets_origtext" android:textColor="#081008" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="12.0sp" android:layout_below="@id/tweets_nick"/>   
11.         <TextView android:layout_marginLeft="6.0dip" android:id="@+id/tweets_source" android:textColor="#101810" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="10.0sp" android:layout_below="@id/tweets_origtext" android:layout_alignParentBottom="true"/>   
12.     </RelativeLayout>   
13. </LinearLayout>  
14. http://helloandroid.iteye.com/blog/1136748