我需要从http Get解析和数组。
我收到：
[
{
"category_id": "334",
"category_name": "ENGLISH PREMIER LEAGUE VOD",
"parent_id": 0
},......
所以我开始使用
public class Welcome extends Activity {
Button btnLogout;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Intent intent = getIntent();
String Welcome=("Welcome ," +getIntent().getStringExtra("Username"));
String Username= (getIntent().getStringExtra("Username"));
String Password =(getIntent().getStringExtra("Password"));
TextView textView = (TextView) findViewById(R.id.usertext);
textView.setTextSize(45);
textView.setText(Welcome);
System.out.println("reseived "+ Welcome);
System.out.println("reseived Pass "+ Password);
btnLogout = (Button) findViewById(R.id.btnLogout);
btnLogout.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent login = new Intent(getApplicationContext(), MainActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
finish();
System.exit(0);
}
});
new DownloadTask().execute("http://stb.spades-tv.xyz:25461/player_api.php?username=" + Username + "&password=" + Password+"&action=get_vod_categories");
}
Andthen
private class DownloadTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
try {
return downloadContent(params[0]);
} catch (IOException e) {
return "Unable to retrieve data. URL may be invalid.";
}
}
@Override
protected void onPostExecute(String result) {
Toast.makeText(Welcome.this, result, Toast.LENGTH_LONG).show();
}
}
public String convertInputStreamToString(InputStream stream, int length) throws IOException, UnsupportedEncodingException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));
String line = "";
Reader reader = null;
String result = "";
reader = new InputStreamReader(stream, "UTF-8");
char[] buffer = new char[length];
reader.read(buffer);
while ((line = bufferedReader.readLine()) != null)
result += line;
stream.close();
if (result != null) {
//TODO someting here
}
else { System.out.println(" 404 "); }
getinfos(result);
return result;
// return new String(buffer);
}
private String downloadContent(String myurl) throws IOException {
InputStream is = null;
int length = 500;
try {
URL url = new URL(myurl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000 /* milliseconds */);
conn.setConnectTimeout(15000 /* milliseconds */);
conn.setRequestMethod("GET");
conn.setDoInput(true);
conn.connect();
int response = conn.getResponseCode();
Log.d(TAG, "The response is: " + response);
is = conn.getInputStream();
// Convert the InputStream into a string
String contentAsString = convertInputStreamToString(is, length);
System.out.println("Received from VOD list :" + contentAsString);
return contentAsString;
} finally {
if (is != null) {
is.close();
}
}
}
在这部分我想转换为数组
[]数组和{}对象对吗？
public void getinfos (String result)
{
try {
JSONArray jsonArr = new JSONArray(result);
for (int i = 0; i < jsonArr.length(); i++)
{
JSONObject jsonObj = jsonArr.getJSONObject(i);
System.out.println(" My VOD List :" +jsonObj);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
奇怪的是，这看到第一个atergory_id我缺少了一部分吗？我收到这个错误？：
W/System.err: org.json.JSONException: Value egory_id" of type java.lang.String cannot be converted to JSONArray
W/System.err: at org.json.JSON.typeMismatch(JSON.java:111)
W/System.err: at org.json.JSONArray.<init>(JSONArray.java:96)
W/System.err: at org.json.JSONArray.<init>(JSONArray.java:108)
W/System.err: at ca.iptvbooster.testhttp.Welcome.getinfos(Welcome.java:185)
W/System.err: at ca.iptvbooster.testhttp.Welcome.convertInputStreamToString(Welcome.java:129)
W/System.err: at ca.iptvbooster.testhttp.Welcome.downloadContent(Welcome.java:156)
W/System.err: at ca.iptvbooster.testhttp.Welcome.access$100(Welcome.java:41)
W/System.err: at ca.iptvbooster.testhttp.Welcome$DownloadTask.doInBackground(Welcome.java:95)
W/System.err: at ca.iptvbooster.testhttp.Welcome$DownloadTask.doInBackground(Welcome.java:89)
W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:333)
W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:266)
W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
W/System.err: at java.lang.Thread.run(Thread.java:764)
I/System.out: Received from VOD list :egory_id":"195","category_name":"LINE OF DUTY SEASON 2","parent_id":"77"},..
答案 0 :(得分：0)
演示清理版本的'convertInputStreamToString'，它是解析问题的根源 - 请参阅注释。包含测试代码。 “getinfos”在编码时起作用了。
import android.util.Log;
import org.json.*;
import java.io.*;
import java.nio.charset.Charset;
public class TestJsonParse {
public void test() {
StringBuffer sb = new StringBuffer();
sb.append("[ { 'category_id': '334', 'category_name': 'ENGLISH PREMIER LEAGUE VOD', 'parent_id': 0 }, ");
sb.append("{ 'category_id': '456', 'category_name': 'ENGLISH PREMIER LEAGUE ROCKS', 'parent_id': 2 }]");
InputStream stream = new ByteArrayInputStream(sb.toString().getBytes(Charset.forName("UTF-8")));
try {
convertInputStreamToString(stream);
} catch (Exception e) {
Log.e("TestJsonParse", "Issue with stream: "+e);
}
}
/** @return null if errors reading/parsing stream. */
public String convertInputStreamToString(InputStream stream) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream));
StringBuffer sb = new StringBuffer();
String result = null;
String line;
while ((line = bufferedReader.readLine()) != null) {
sb.append(line);
}
//https://stackoverflow.com/questions/1388602/do-i-need-to-close-both-filereader-and-bufferedreader
bufferedReader.close();
if (sb.length() > 0) {
result = sb.toString();
getinfos(result);
}
else {
Log.e("TestJsonParse"," 404 ");
}
return result;
}
// Existing 'getinfos' worked as is...
}