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;
@Override
protected 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() {
@Override
public 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
*/
@Override
public 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 block
e.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() {
@Override
public void run() {
content = HttpUtils.sendGetClient(path);
// 发送消息
handler.sendEmptyMessage(ListVideoActivity.INTENTDATA);
}
}).start();
}
class VideoAdapter extends BaseAdapter {
@Override
public int getCount() {
return array.length();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
try {
return array.get(position);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public 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;
@Override
protected 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 block
e.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 path
HttpPost httpPost = new HttpPost(path);
//封装请求的参数集合
List parameters = new ArrayList();
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();
//data
byte data[] = StreamTools.isToData(is);
//转换成字符串
content = new String(data);
}
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.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() {
@Override
public 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() {
@Override
public 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;
}
}
完整代码请访问：http://download.csdn.net/detail/chrp99/5629565