我是 AsyncTask 的新手。所以我需要有人给我一个例子。我的应用程序的方式很简单而且非常直接,我只需要有人给我一个示例,说明我如何将我的信息放入 AsyncTask。
public class MainActivity extends Activity {
EditText et;
Button getanswer;
JSONArray ResultsSet = null; {}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button getanswer = (Button) findViewById(R.id.button1);
getanswer.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
new asynctask().execute();
}
});
}
}
class asynctask extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... params) {
return null;
}}
JSONParser 类
public class JSONParsser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
EditText et;
public JSONParsser () {
}
public JSONObject getJSONFromURI(String uRI) {
try{
HttpClient client = new DefaultHttpClient();
try {
URI website = new URI("http://example.com=" + et.getText() + "json");
HttpGet request = new HttpGet();
request.setURI(website);
try {
HttpResponse response = client.execute(request);
HttpEntity httpEntity = response.getEntity();
is = httpEntity.getContent();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (URISyntaxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return jObj;
}finally{}
}{
}}
JSONParser 实例
public class JSONParserInstance {
JSONParsser jParser = new JSONParsser();
public String uRI;
JSONObject json = jParser.getJSONFromURI(uRI);
private static final String TAG_RESULTS = "ResultsSet";
private static final String TAG_SUBJECT = "Subject";
private static final String TAG_NUMANSWERS = "NumAnswers";
private static final String TAG_QUESTION = "Question";
private static final String TAG_QUESTION_CONTENT = "Content";
private static final String TAG_QUESTION_CHOSENANSWER = "ChosenAnswer";
private static final String TAG_QUESTION_ANSWERS = "Answers";
JSONArray ResultsSet = null; {
try {
ResultsSet = json.getJSONArray(TAG_RESULTS);
for(int i = 0; i < ResultsSet.length(); i++){
JSONObject r = ResultsSet.getJSONObject(i);
String Subject = r.getString(TAG_SUBJECT);
String NmAnswers = r.getString(TAG_NUMANSWERS);
JSONObject Question = r.getJSONObject(TAG_QUESTION);
String Content = Question.getString(TAG_QUESTION_CONTENT);
String ChosenAnswer = Question.getString(TAG_QUESTION_CHOSENANSWER);
String Answers = Question.getString(TAG_QUESTION_ANSWERS);
}
} catch (JSONException e) {
e.printStackTrace();
}}}
我真正需要的只是一个如何将其放入我的 AsyncTask 的示例