Android 解析JSON数组

1：服务端是使用PHP，从数据库中查询出一个二维数组，然后调用系统函数以json格式返回给客户端。

返回结果如下：http://192.168.0.116/server/selectTitle2json.php

[{"title":"\u5173\u4e8e10\u67089\u65e5\u5c40\u957f\u201c12366\u5728\u7ebf\u201d\u7684\u901a\u77e5"},{"title":"\u5173\u4e8e9\u670825\u65e5\u5c40\u957f\u201c12366\u5728\u7ebf\u201d\u7684\u901a\u77e5"},{"title":"\u5173\u4e8e\u7f51\u4e0a\u529e\u7a0e\u7cfb\u7edf\u5c0f\u5fae\u4f01\u4e1a\u514d\u7a0e\u529f\u80fd\u5347\u7ea7\u7684\u901a\u77e5"},{"title":"\u5173\u4e8e\u7f51\u7edc\u53d1\u7968\u7cfb\u7edf\u4e34\u65f6\u6682\u505c\u7684\u7d27\u6025\u901a\u77e5"},{"title":"\u5173\u4e8e9\u67083\u65e5\u4e92\u8054\u7f51\u201c\u5728\u7ebf\u8bbf\u8c08\u201d\u7684\u901a\u77e5"},{"title":"\u5173\u4e8e9\u67084\u65e5\u5c40\u957f\u201c12366\u5728\u7ebf\u201d\u7684\u901a\u77e5"},{"title":"\u5173\u4e8e\u542f\u7528\u8d27\u7269\u8fd0\u8f93\u4e1a\u589e\u503c\u7a0e\u4e13\u7528\u53d1\u7968\u7f51\u4e0a\u6284\u62a5\uff08\u542b\u673a\u52a8\u8f66\uff09\u7cfb\u7edf\u7684\u901a\u77e5"},{"title":"\u5173\u4e8e\u7f51\u4e0a\u529e\u7a0e\u7cfb\u7edf\u81f4\u8425\u6539\u589e\u7eb3\u7a0e\u4eba\u7684\u4e00\u5c01\u4fe1"},{"title":"\u5173\u4e8e\u7f51\u4e0a\u529e\u7a0e\u7cfb\u7edf\u8425\u6539\u589e\u529f\u80fd\u5347\u7ea7\u7684\u901a\u77e5"},{"title":"\u5173\u4e8e8\u670828\u65e5\u5c40\u957f\u201c12366\u5728\u7ebf\u201d\u7684\u901a\u77e5"}]

2：activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/btn_get_titles"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Get Titles"/>

<ListView
           android:id="@+id/lv_show"
        android:layout_below="@id/btn_get_titles"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</RelativeLayout>

3：MainActivity.java

public class MainActivity extends Activity implements OnClickListener {
    private Button btnGetTitles=null;
    private ListView lvShow=null;
    private List<Object> titleList=null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initUI();

        btnGetTitles.setOnClickListener(this);
    }

    private void initUI(){
        btnGetTitles=(Button)findViewById(R.id.btn_get_titles);
        lvShow=(ListView)findViewById(R.id.lv_show);
    }

    @Override
    public void onClick(View arg0) {
        new Thread(new GetTitlesThread()).start();
    }

    Handler getTitlesHandler=new Handler(){
        public void handleMessage(Message msg){
            if(msg.what==100){
                ArrayAdapter<Object> adapter=new ArrayAdapter<Object>(
                        MainActivity.this,
                        android.R.layout.simple_list_item_1,
                        titleList);
                lvShow.setAdapter(adapter);
            }
        }
    };
    class GetTitlesThread implements Runnable{
        @Override
        public void run() {
            String url="http://www.zhihuiqd.com/wsht/server/selectTitle2json.php";
            StringBuilder builder=new StringBuilder();
            HttpClient client=new DefaultHttpClient();
            HttpGet get=new HttpGet(url);
            try{
                HttpResponse response=client.execute(get);

                if(response.getStatusLine().getStatusCode()==200){
                    BufferedReader reader=new BufferedReader(
                            new InputStreamReader(response.getEntity().getContent()));

                    for(String s=reader.readLine();s!=null;s=reader.readLine()){
                        builder.append(s);
                    }

                    JSONArray json=new JSONArray(builder.toString());
                    int len=json.length();
                    String title="";
                    titleList=new ArrayList<Object>();

                    for(int i=0;i<len;i++){
                        JSONObject temp=(JSONObject)json.get(i);
                        title=temp.getString("title");
                        titleList.add(title);
                    }

                    getTitlesHandler.obtainMessage(100).sendToTarget();
                }
            }catch(Exception e){
                //
            }
        }
    }
}

4：最后不要忘记在AndroidManifest.xml文件中加入：

<uses-permission android:name="android.permission.INTERNET"/>