Android腾讯微薄客户端开发十二:博主的偶像

 
点击收听，显示此博主的偶像列表，点击列表，将显示偶像的详情界面 
 

public class IdolActivity extends ListActivity implements OnItemClickListener{

    private DataHelper dataHelper;
    private UserInfo user;
    private MyWeiboSync weibo;
    private Handler handler;
    private AsyncImageLoader asyncImageLoader;
    private IdolThread thread;
    private ProgressDialog progressDialog;
    private JSONArray array;
    private IdolAdapter adapter;
    private ListView listView;
    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.idol);
        setUpViews();//设置view
        setUpListeners();//设置listenter

        asyncImageLoader = new AsyncImageLoader();
        dataHelper = new DataHelper(IdolActivity.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+"的偶像");

        progressDialog = new ProgressDialog(IdolActivity.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 IdolHandler();
        thread = new IdolThread();
        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.idol_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 IdolThread extends Thread {
        @Override
        public void run() {
            String jsonStr = weibo.getIdols(weibo.getAccessTokenKey(), weibo.getAccessTokenSecrect(), 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 IdolHandler extends Handler {
        @Override
        public void handleMessage(Message msg){
            adapter = new IdolAdapter(IdolActivity.this, array);
            listView.setAdapter(adapter);
            progressDialog.dismiss();// 关闭进度条
        }
    }

    class IdolAdapter extends BaseAdapter {
        private Context context;
        private LayoutInflater inflater;
        private JSONArray array;

        public IdolAdapter(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();
            IdolViewHolder viewHolder = new IdolViewHolder();
            JSONObject data = (JSONObject)array.opt(position);
            convertView = inflater.inflate(R.layout.idol_list_item, null);

            viewHolder.idol_headicon = (ImageView) convertView.findViewById(R.id.idol_headicon);
            viewHolder.idol_nick = (TextView) convertView.findViewById(R.id.idol_nick);
            viewHolder.idol_name = (TextView) convertView.findViewById(R.id.idol_name);

            Drawable cachedImage = null;
            if(data!=null){
                try {
                    convertView.setTag(data.get("name"));
                    viewHolder.idol_nick.setText(data.getString("nick"));
                    viewHolder.idol_name.setText("@"+data.getString("name"));
                    //异步加载图片
                    cachedImage = asyncImageLoader.loadDrawable(data.getString("head")+"/100",viewHolder.idol_headicon, new ImageCallback(){
                        @Override
                        public void imageLoaded(Drawable imageDrawable,ImageView imageView, String imageUrl) {
                            imageView.setImageDrawable(imageDrawable);
                        }
                    });
                    if(cachedImage == null) {
                        viewHolder.idol_headicon.setImageResource(R.drawable.icon);
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            return convertView;
        }
    }

    static class IdolViewHolder {
        private ImageView idol_headicon;
        private TextView idol_nick;
        private TextView idol_name;
    }

    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
        Intent intent = new Intent(IdolActivity.this,UserInfoActivity.class);
        try {
            JSONObject fansInfo = (JSONObject)array.opt(position);
            JSONArray tweets = fansInfo.getJSONArray("tweet");
            JSONObject tweet = null;
            if(tweets!=null&&tweets.length()>0){
                tweet = (JSONObject)tweets.opt(0);
                intent.putExtra("origtext", tweet.getString("text"));
                intent.putExtra("timestamp", TimeUtil.getStandardTime(tweet.getLong("timestamp")));
            }
            intent.putExtra("name", fansInfo.getString("name"));
            intent.putExtra("nick", fansInfo.getString("nick"));
        } catch (JSONException e) {
            e.printStackTrace();
        }
        startActivity(intent);//跳转到用户信息界面
    }
}

<?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/idol_top" layout="@layout/top_panel" android:layout_alignParentTop="true"/>
    <ListView android:id="@id/android:list" android:layout_below="@id/idol_top" android:layout_width="fill_parent" android:cacheColorHint="#00000000"
        android:layout_height="fill_parent" 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/idol_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/idol_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>

<?xml version="1.0" encoding="utf-8"?>
<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">
    <RelativeLayout android:layout_width="50.0dip" android:layout_height="50.0dip" android:layout_weight="0.0">
        <ImageView android:id="@+id/idol_headicon" android:layout_width="45.0dip" android:layout_height="45.0dip" android:scaleType="fitCenter" android:layout_centerInParent="true" />
    </RelativeLayout>
    <RelativeLayout android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="4.0dip" android:layout_weight="1.0">
        <TextView android:id="@+id/idol_nick" android:textColor="#000000" android:layout_width="wrap_content" android:layout_height="32.0dip" android:textSize="14.0sp" android:layout_alignParentLeft="true"/>
        <TextView android:id="@+id/idol_name" android:layout_marginLeft="6.0dip" android:layout_below="@id/idol_nick" android:textColor="#ff000000" android:layout_width="wrap_content" android:layout_height="32.0dip" android:textSize="8.0sp" android:layout_alignParentLeft="true"/>
    </RelativeLayout>
</LinearLayout>

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