微信精选案例HttpClient post请求

来源：互联网发布：js base64 乱码编辑：程序博客网时间：2024/05/07 11:22

public class MainActivity extends Activity {    List<MyData> listall = new ArrayList<Bean.MyData>();    private ListView lv;    private ProgressBar pb1;    private int index = 1;    private ProgressBar pb2;    MyAdapter adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        init();        pb1.setVisibility(pb1.VISIBLE);        // 获取网络数据        getSouse();    }    private void init() {        lv = (ListView) findViewById(R.id.lv);        lv.setOnScrollListener(new OnScrollListener() {            @Override            public void onScrollStateChanged(AbsListView view, int scrollState) {                if (scrollState == OnScrollListener.SCROLL_STATE_IDLE                        && lv.getLastVisiblePosition() == listall.size() - 1) {                    index++;                    getSouse();                }            }            @Override            public void onScroll(AbsListView view, int firstVisibleItem,                    int visibleItemCount, int totalItemCount) {                // TODO Auto-generated method stub            }        });        lv.setOnItemClickListener(new OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view,                    int position, long id) {                MyData data = listall.get(position);                Intent intent=new Intent(MainActivity.this,Main2Activity.class);                intent.putExtra("url",data.url);                startActivity(intent);            }        });        pb1 = (ProgressBar) findViewById(R.id.pb1);        pb2 = (ProgressBar) findViewById(R.id.pb2);    }    // 获取网络资源    private void getSouse() {        AsyncTask<Void, Void, String> as = new AsyncTask<Void, Void, String>() {            @Override            protected void onPreExecute() {                // 显示进度条                pb2.setVisibility(pb2.VISIBLE);                super.onPreExecute();            }            @Override            protected void onPostExecute(String result) {                String json = result;                Gson gson = new Gson();                Bean bean = gson.fromJson(json, Bean.class);                List<MyData> list = bean.result.list;                System.out.println(list);                listall.addAll(list);                if (adapter == null) {                    adapter = new MyAdapter(listall, MainActivity.this);                    lv.setAdapter(adapter);                    pb2.setVisibility(pb2.GONE);                    pb1.setVisibility(pb1.GONE);                } else {                    adapter.notifyDataSetChanged();                    pb2.setVisibility(pb2.GONE);                }                super.onPostExecute(result);            }            @Override            protected String doInBackground(Void... params) {                try {                    HttpClient httpClient = new DefaultHttpClient();                    HttpPost post = new HttpPost(                            "http://v.juhe.cn/weixin/query");                    List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();                    parameters.add(new BasicNameValuePair("key",                            "07722feab9b1643834ae1ca387eea40b"));                    parameters.add(new BasicNameValuePair("pno", index + ""));                    HttpEntity entity = new UrlEncodedFormEntity(parameters,                            "utf-8");                    post.setEntity(entity);                    HttpResponse response = httpClient.execute(post);                    if (response.getStatusLine().getStatusCode() == 200) {                        InputStream is = response.getEntity().getContent();                        ByteArrayOutputStream os = new ByteArrayOutputStream();                        byte[] b = new byte[1024];                        int len = 0;                        while ((len = is.read(b)) != -1) {                            os.write(b, 0, len);                        }                        String str = os.toString("utf-8");                        return str;                    }                } catch (Exception e) {                    e.printStackTrace();                }                return null;            }        };        // 执行        as.execute();    }}

适配器

public class MyAdapter extends BaseAdapter {    private List<MyData> list;    private Context context;    public MyAdapter(List<MyData> list, Context context) {        super();        this.list = list;        this.context = context;    }    @Override    public int getCount() {        // TODO Auto-generated method stub        return list.size();    }    @Override    public Object getItem(int position) {        // TODO Auto-generated method stub        return list.get(position);    }    @Override    public long getItemId(int position) {        // TODO Auto-generated method stub        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        MyData data = list.get(position);        ViewHolder vh;        if (convertView==null) {            vh=new ViewHolder();            convertView=View.inflate(context,R.layout.item,null);            vh.image=(ImageView) convertView.findViewById(R.id.image);            vh.tv1=(TextView) convertView.findViewById(R.id.tv1);            vh.tv2=(TextView) convertView.findViewById(R.id.tv2);            convertView.setTag(vh);        }        else{            vh=(ViewHolder) convertView.getTag();        }        BitmapUtils utils=new BitmapUtils(context);        utils.display(vh.image,data.firstImg);        vh.tv1.setText(data.title);        vh.tv2.setText(data.source);        return convertView;    }    class ViewHolder {        ImageView image;        TextView tv1;        TextView tv2;    }}

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