Android模仿新浪微博（主页微博，评论界面）
主页微博：
获取当前登录用户及其所关注（授权）用户的最新微博接口：http://open.weibo.com/wiki/2/statuses/friends_timeline
代码详解：
1.异步get请求数据，由于数据中带图片，故需要多线程管理，参数设置按照接口一一对应。
2.请求的数据respone数据解析后，单条保存WeiboInfo数据域集合中，然后add到ArrayList中。
3.获取的数据，按布局加载到自定义Listview中（后面讲解），该自定义Listview具有滑动下拉刷新的功能。
4.刷新页面数据的方法，使用 adapater.notifyDataSetChanged()释放listview里的原数据，然后异步线程通知主线程重新获取数据。
5.GetDataTask类继承AsyncTask，以响应滑动下拉事件。改事件与手动按钮的刷新方法完全一致。
/**
* Created by D&LL on 2016/7/20.
* 主页模块
*/
public class HomeActivity extends Activity {
private OAuth oAuth = null;
private RequestParams params;
private String TAG = "HomeActivity";
private Tools tools;
private WeiboAdapter adapater = null;
// 保存需要显示的多条微博数据
public ArrayList weiboList = null;
public static PullToRefreshListView listView;
private ImageButton refresh;
private TextView user_name;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
listView = (PullToRefreshListView) findViewById(R.id.Msglist);
user_name = (TextView) findViewById(R.id.user_name);
refresh = (ImageButton) findViewById(R.id.refresh);
init();
//按钮刷新微博
refresh.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
refresh();
}
});
//listview下拉刷新
listView.setOnRefreshListener(new PullToRefreshListView.OnRefreshListener() {
@Override
public void onRefresh() {
new GetDataTask(HomeActivity.this, 0).execute();
}
@Override
public void onLoadMore() {
}
});
}
/**
* 加载首页数据
*/
private void init() {
tools = Tools.getInstance();
getUserName();
//获取微博数据
weiboList = tools.getWeiboContent(this);
if (weiboList != null) {
// 创建一个Adapter设置ListView中的每项Item项数据
adapater = new WeiboAdapter(HomeActivity.this, weiboList);
listView.setAdapter(adapater);
} else {
adapater = new WeiboAdapter(HomeActivity.this, null);
listView.setAdapter(adapater);
}
}
/**
* 用于标题栏显示用户名
*/
public void getUserName() {
if (oAuth == null) {
oAuth = OAuth.getOAuth(this);
}
params = new RequestParams();
params.put("access_token", oAuth.getAccessToken());
params.put("uid", oAuth.getUid());
WeiboRestClient.get("2/users/show.json", params, new JsonHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
try {
String screen_name = response.getString("screen_name");
user_name.setText(screen_name);
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
public void onFailure(int statusCode, Header[] headers, String responseString, Throwable throwable) {
super.onFailure(statusCode, headers, responseString, throwable);
Log.i(TAG, "获取失败");
}
});
}
Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
//通知数据改变，更新listview
adapater.weiboList = (ArrayList) msg.obj;
adapater.notifyDataSetChanged();
}
};
//刷新页面数据的方法
public void refresh() {
adapater.weiboList.clear();
adapater.notifyDataSetChanged();
ArrayList new_contentList = tools.getWeiboContent(HomeActivity.this);
Message msg = handler.obtainMessage();
msg.obj = new_contentList;
handler.sendMessage(msg);
if (new_contentList != null) {
// 创建一个Adapter设置ListView中的每项Item项数据
adapater = new WeiboAdapter(HomeActivity.this, new_contentList);
listView.setAdapter(adapater);
} else {
adapater = new WeiboAdapter(HomeActivity.this, null);
listView.setAdapter(adapater);
}
}
private class GetDataTask extends AsyncTask {
private Context context;
private int index;
public GetDataTask(Context context, int index) {
this.context = context;
this.index = index;
}
@Override
protected String[] doInBackground(Void... params) {
return new String[0];
}
@Override
protected void onPostExecute(String[] result) {
if (index == 0) {
refresh();
SimpleDateFormat format = new SimpleDateFormat(
"yyyy年MM月dd日 HH:mm");
String date = format.format(new Date());
// Call onRefreshComplete when the list has been refreshed.
listView.onRefreshComplete(date);
}
super.onPostExecute(result);
}
}
} 使用httpClient get方法获得所需数据，对获得的json数据逐条解析，由于原创微博与转发微博json数据格式不同，故需要先判断解析不同部分然后处理相同部分。
使用 thread.start()释放异步线程的数据，以获得所需数据。
此处包含一个时间处理类（后面详解），计算微博发出时间距现在的时长。
该方法位于Tools类中
/**
* 自定义异步线程加载微博
* 并对微博评论数据进行处理
* 对线程进行处理可以获得返回值
* @param context
* @return
*/
public ArrayList getWeiboContent(Context context) {
if (oAuth == null) {
oAuth = oAuth.getOAuth(context);
}
class MyThread extends Thread {
@Override
public void run() {
String url = "https://api.weibo.com/2/statuses/friends_timeline.json";
List params = new ArrayList<>();
params.add(new BasicNameValuePair("access_token", oAuth.getAccessToken()));
params.add(new BasicNameValuePair("count", "100"));
String param = URLEncodedUtils.format(params, "UTF-8");
HttpGet get = new HttpGet(url + "?" + param);
httpClient = new DefaultHttpClient();
try {
HttpResponse responses = httpClient.execute(get);
if (responses.getStatusLine().getStatusCode() == 200) {
String r = EntityUtils.toString(responses.getEntity());
JSONObject response = new JSONObject(r);
//对获得的100条微博json数据遍历解析，放到对象集合中，然后添加到ArrayList里
for (int i = 0; i < 100; i++) {
WeiBoInfo weiBoInfo = new WeiBoInfo();
JSONArray statuses = response.getJSONArray("statuses");
JSONObject world = statuses.getJSONObject(i);
JSONObject user = world.getJSONObject("user");
//转发的微博
if (world.has("retweeted_status")) {
JSONObject retweeted_status = world.getJSONObject("retweeted_status");
JSONObject retweeted_user = retweeted_status.getJSONObject("user");
String retweeted_name = "@" + retweeted_user.getString("screen_name")
+ ":";
String text = world.getString("text") + ":\n" +
retweeted_name +
retweeted_status.getString("text");
JSONArray img = retweeted_status.getJSONArray("pic_urls");
weiBoInfo.setText(text);
Boolean haveImg = false;
if (img != null) {
haveImg = true;
String[] pics = new String[img.length()];
for (int n = 0; n < img.length(); n++) {
JSONObject pic = img.getJSONObject(n);
pics[n] = pic.getString("thumbnail_pic");
}
weiBoInfo.setImage_context(pics);
}
weiBoInfo.setHaveImage(haveImg);
} else {
// 获得weibo内容
String text = world.getString("text");
JSONArray img = world.getJSONArray("pic_urls");
weiBoInfo.setText(text);
Boolean haveImg = false;
if (img != null) {
haveImg = true;
String[] pics = new String[img.length()];
for (int n = 0; n < img.length(); n++) {
JSONObject pic = img.getJSONObject(n);
pics[n] = pic.getString("thumbnail_pic");
}
weiBoInfo.setImage_context(pics);
}
weiBoInfo.setHaveImage(haveImg);
}
// 获得发weibo 用户的名称
String name = user.getString("screen_name");
// 获得发weibo 用户的头像url链接
String userIcon = user.getString("avatar_large");
// 获得发weibo的时间
String time = world.getString("created_at");
Date startDate = new Date(time);
SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
time = sd.format(startDate);
String nowtime = new DateUtils().getInterval(time);
if (weiboList == null) {
// 创建存储每条微博的集合
weiboList = new ArrayList<>();
}
//数据设置
weiBoInfo.setUserName(name);
weiBoInfo.setTime(nowtime);
weiBoInfo.setUserIcon(userIcon);
// 将单条微博数据设置到集合中
weiboList.add(weiBoInfo);
/* Log.i(TAG, time);
Log.i(TAG, world.getString("text"));
Log.i(TAG, user.getString("avatar_large"));*/
}
}
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
}
}
//处理异步线程，以获得weibilist的返回值
MyThread thread = new MyThread();
thread.start();
try {
thread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
return weiboList;
} HomeActivity布局home.xml 改布有一个标题栏(包含手动刷新按钮，和显示用户名的TextView），一个自定义的ListView。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ly_main_weixin"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/backgroundimage"
android:orientation="vertical">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:background="@drawable/title_bar">
<ImageButton
android:id="@+id/refresh"
android:layout_width="60dp"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginStart="10dp"
android:background="@drawable/refresh"/>
<TextView
android:id="@+id/user_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:textColor="#fff"
android:textSize="20sp"
android:textStyle="bold"/>
RelativeLayout>
<study.sinatest.util.PullToRefreshListView
android:id="@+id/Msglist"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="0px"
android:background="#BBFFFFFF"
android:cacheColorHint="#00000000"
android:divider="@drawable/link"
android:dividerHeight="5px"
android:fastScrollEnabled="true"
android:focusable="true"/>
LinearLayout>评论
获取当前登录用户的最新评论包括接收到的与发出的接口：http://open.weibo.com/wiki/2/comments/timeline
该界面功能与主页微博功能除了数据处理略有不同，其余完全一致，不再详细叙述，有疑问请参考代码。
