Android中通过网络获取json数据来播放视频

为了实现本地化的测试，要新建一个java 类做为服务端让手机来访问

把json放到你服务端tomcat中如图：

json数据的内容为：

{  "videos":[      {          "id":"1",          "title":"泡芙小姐的灯泡",          "image":"http://172.22.64.28:8080/doudou/images/fu.jpg",          "duration":"910",          "category":"原创",          "state":"normal",          "published":"2011-07-15  09:00:42",          "description":"当一个人在一座城市搬11次家。就意味着准备在这个城市买房了",          "player":"http://172.22.64.28:8080/doudou/video/oppo.3gp"      },      {          "id":"2",          "title":"爱在春天",          "image":"http://172.22.64.28:8080/doudou/images/spring.jpg",          "duration":"910",          "category":"原创",          "state":"normal",          "published":"2013-04-15  09:00:42",          "description":"上世纪30年代中期，整个中国动荡不安，几个年轻女孩依然怀抱着勇气，追寻着理想与爱情。",          "player":"http://172.22.64.28:8080/doudou/video/hao.3gp"      }    }}

public class ListVideoActivity extends Activity {// 获取视频数据的地址private String path = "http://172.22.64.28:8080/doudou/video.json";// 接受服务器端响应的数据private String content;// 声明listView控件private ListView listView;// 声明handler对象private Handler handler;private static final int INTENTDATA = 1;public JSONArray array;public LayoutInflater inflater;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_list_video);// 根据服务获取inflater对象inflater = (LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);// 发送请求 获取网络数据sendGet();// 获取控件对象listView = (ListView) findViewById(R.id.lv_videos);// 实例化 handler操作handler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);switch (msg.what) {case INTENTDATA:// 获取数据操作// 判断不为空 并且不等于""if (content != null && (!"".equals(content))) {try {// 把它转换成json对象 {} []JSONObject obj = new JSONObject(content);array = obj.getJSONArray("videos");listView.setAdapter(new VideoAdapter());// 设置显示的视图//listView注册事件listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {/** * parent :listView * view 每个条目控件 * position:条目所在的位置 * id：行号 0  */@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {JSONObject jsonObj = (JSONObject) parent.getItemAtPosition(position);Intent intent = new Intent(ListVideoActivity.this,VideoViewActivity.class);try {intent.putExtra("path", jsonObj.getString("player"));startActivity(intent);} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}}});} catch (JSONException e) {System.out.println("------------exeception-------------"+ e.getMessage());}}break;default:break;}}};}public void sendGet() {// 操作发送网络请求new Thread(new Runnable() {@Overridepublic void run() {content = HttpUtils.sendGetClient(path);// 发送消息handler.sendEmptyMessage(ListVideoActivity.INTENTDATA);}}).start();}class VideoAdapter extends BaseAdapter {@Overridepublic int getCount() {return array.length();}@Overridepublic Object getItem(int position) {// TODO Auto-generated method stubtry {return array.get(position);} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// 创建一个显示的控件 每个条目对应的控件// 根据inflate方法 把一个布局文件转换成View控件对象View v = inflater.inflate(R.layout.activity_list, null);// findViewById()来获取View布局对象中的控件TextView tv_title = (TextView) v.findViewById(R.id.tv_title);TextView tv_duration = (TextView) v.findViewById(R.id.tv_duration);TextView tv_date = (TextView) v.findViewById(R.id.tv_date);ImageView iv_icon = (ImageView) v.findViewById(R.id.iv_image);try {JSONObject jsonObj = (JSONObject) array.get(position);// 设置显示控件的文本tv_title.setText("标题:" + jsonObj.getString("title"));tv_duration.setText("时长:" + jsonObj.getString("duration"));tv_date.setText("发布时间:" + jsonObj.getString("published"));iv_icon.setId(R.drawable.ic_launcher);// 默认的图标} catch (Exception e) {System.out.println("eeeee" + e.getMessage());e.printStackTrace();}// 返回v对象return v;}}}

public class VideoViewActivity extends Activity {private VideoView videoView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);// 控件this.setContentView(R.layout.activity_videoview);videoView = (VideoView) findViewById(R.id.vv_video);String path = this.getIntent().getStringExtra("path");if (path != null) {// 指定播放的视频文件即可videoView.setVideoURI(Uri.parse(path));System.out.println(path);// 设置视频播放的控制器videoView.setMediaController(new MediaController(this));// 视频开始播放videoView.start();} else {Toast.makeText(this, "path路径为空", Toast.LENGTH_LONG).show();}}}

public class HttpUtils {/** * httpClient发送的GET请求 *  * @param path * @return */public static String sendGetClient(String path) {String content = null;try {// 创建一个httpClient的客户端对象HttpClient httpClient = new DefaultHttpClient();// 发送的Get请求HttpGet httpGet = new HttpGet(path);// 客户端HttpResponse httpResponse = httpClient.execute(httpGet);// 判断服务端是否响应成功if (httpResponse.getStatusLine().getStatusCode() == 200) {// 获取响应的内容InputStream is = httpResponse.getEntity().getContent();byte data[] = StreamTools.isToData(is);content = new String(data);// 关闭流is.close();}} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}return content;}/** * httpclient客户端发送Post请求 * @param path * @param name * @param pass * @return */public static String sendPostClient(String path, String name, String pass) {String content = null;//创建一个httpClient对象HttpClient httpClient = new DefaultHttpClient();//创建请求方式对象  pathHttpPost httpPost = new HttpPost(path);//封装请求的参数集合List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();parameters.add(new BasicNameValuePair("user.name", name));parameters.add(new BasicNameValuePair("user.pass", pass));UrlEncodedFormEntity entity = null;try {//封装请参数的实体对象entity = new UrlEncodedFormEntity(parameters, "UTF-8");//把参数设置到 httpPost中httpPost.setEntity(entity);//执行请求HttpResponse httpResponse = httpClient.execute(httpPost);//判断响应是否成功if (httpResponse.getStatusLine().getStatusCode() == 200) {//获取响应的内容InputStream is = httpResponse.getEntity().getContent();//databyte data[] = StreamTools.isToData(is);//转换成字符串content = new String(data);}} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (ClientProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}return content;}}

public class NetWorkUtils {private Context context;// 网路链接管理对象public ConnectivityManager connectivityManager;public NetWorkUtils(Context context) {this.context = context;// 获取网络链接的对象connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);}public boolean setActiveNetWork() {boolean flag =false;// 获取可用的网络链接对象NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();if (networkInfo == null) {new AlertDialog.Builder(context).setTitle("网络不可用").setMessage("可以设置网络?").setPositiveButton("确认",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog,int which) {Toast.makeText(context, "点击确认",Toast.LENGTH_LONG).show();// 声明意图Intent intent = new Intent();intent.setAction(Intent.ACTION_MAIN);intent.addCategory("android.intent.category.LAUNCHER");intent.setComponent(new ComponentName("com.android.settings","com.android.settings.Settings"));intent.setFlags(0x10200000);// 执行意图context.startActivity(intent);}}).setNegativeButton("取消",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog,int which) {}}).show();// 必须.show();}//判断网络是否可用if(networkInfo!=null){flag =true;}return flag;}}

public class StreamTools {public static byte[] isToData(InputStream is) throws IOException{// 字节输出流ByteArrayOutputStream bops = new ByteArrayOutputStream();// 读取数据的缓存区byte buffer[] = new byte[1024];// 读取长度的记录int len = 0;// 循环读取while ((len = is.read(buffer)) != -1) {bops.write(buffer, 0, len);}// 把读取的内容转换成byte数组byte data[] = bops.toByteArray();bops.flush();bops.close();is.close();return data;}}

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

完整代码请访问：http://download.csdn.net/detail/chrp99/5629565

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