Android 如果我将AsyncTask移动到其他文件,它会更快吗?
我只是有一些关于Android 如果我将AsyncTask移动到其他文件,它会更快吗?,android,Android,我只是有一些关于AsyncTask 查看此myAsyncTask及其所在的类 public class ListView extends ListActivity { ArrayList<HashMap<String, String>> questionList; final String TAG_RESULTS = "results"; final String TAG_QUESTION_SUBJECT = "S
AsyncTask
查看此myAsyncTask
及其所在的类
public class ListView extends ListActivity {
ArrayList<HashMap<String, String>> questionList;
final String TAG_RESULTS = "results";
final String TAG_QUESTION_SUBJECT = "Subject";
final String TAG_QUESTION_NUMANSWERS = "NumAnswers";
final String TAG_QUESTION = "question";
final String TAG_QUESTION_CONTENT = "Content";
final String TAG_QUESTION_CHOSENANSWER = "ChosenAnswer";
final String TAG_ANSWERS = "Answers";
final String TAG_ANSWER = "Answer";
final String TAG_ANSWERS_CONTENT = "content";
final String TAG_QUERY = "query";
final String TAG_COUNT = "count";
ProgressDialog pDialog;
LoadAllData mTask;
JSONArray question = null;
android.widget.ListView lv;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.listview);
questionList = new ArrayList<HashMap<String, String>>();
mTask = new LoadAllData();
mTask.execute();
}
@Override
protected void onListItemClick(android.widget.ListView l, View v, int pos, long id) {
super.onListItemClick(l, v, pos, id);
HashMap<String, String> item = questionList.get(pos);
Intent i = new Intent(ListView.this, SingleListItem.class);
i.putExtra(TAG_QUESTION_SUBJECT, item.get(TAG_QUESTION_SUBJECT));
i.putExtra(TAG_QUESTION_CONTENT, item.get(TAG_QUESTION_CONTENT));
i.putExtra(TAG_QUESTION_CHOSENANSWER, item.get(TAG_QUESTION_CHOSENANSWER));
startActivity(i);
}
@Override
public void onBackPressed() {
if (mTask != null && mTask.getStatus() != AsyncTask.Status.FINISHED)
{
mTask.cancel(true);
}
super.onBackPressed();
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
if (mTask != null && mTask.getStatus() != AsyncTask.Status.FINISHED)
{
mTask.cancel(true);
}
super.onDestroy();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
if (pDialog != null)
{
if(pDialog.isShowing())
{
pDialog.dismiss();
}
super.onPause();
}
}
class LoadAllData extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ListView.this);
pDialog.setMessage("Loading Data. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
protected String doInBackground(String... args) {
pDialog.setOnCancelListener(new DialogInterface.OnCancelListener(){
public void onCancel(DialogInterface dialog) {
mTask.cancel(true);
finish();
}
});
try {
Intent in = getIntent();
String searchTerm = in.getStringExtra("TAG_SEARCH");
String query = URLEncoder.encode(searchTerm, "utf-8");
String URL = "http://example.com";
JSONParsser jParser = new JSONParsser();
JSONObject json = jParser.readJSONFeed(URL);
try {
JSONArray questions = json.getJSONObject("all").getJSONArray("questions");
for(int i = 0; i < questions.length(); i++) {
JSONObject question = questions.getJSONObject(i);
String Subject = question.getString(TAG_QUESTION_SUBJECT);
String ChosenAnswer = question.getString(TAG_QUESTION_CHOSENANSWER);
String Content = question.getString(TAG_QUESTION_CONTENT);
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_QUESTION_SUBJECT, Subject);
map.put(TAG_QUESTION_CONTENT, Content);
map.put(TAG_QUESTION_CHOSENANSWER, ChosenAnswer);
questionList.add(map);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String file_URL) {
if(file_URL!=null && file_URL.equals("0")) {
pDialog.dismiss();
Toast.makeText(ListView.this, "No data found", Toast.LENGTH_SHORT).show();
finish();
}else{
if (pDialog != null && pDialog.isShowing()) pDialog.dismiss();
ListAdapter adapter = new SimpleAdapter(getBaseContext(), questionList,
R.layout.listelements,
new String[] { TAG_QUESTION_SUBJECT }, new int[] {
R.id.Subject,});
setListAdapter(adapter);
}}}
公共类ListView扩展ListActivity{
ArrayList问题列表;
最终字符串标记_RESULTS=“RESULTS”;
最后一个字符串TAG_QUESTION_SUBJECT=“SUBJECT”;
最后一个字符串标记\问题\ NUMANSWERS=“NUMANSWERS”;
最后一个字符串标记\u QUESTION=“QUESTION”;
最后一个字符串TAG_QUESTION_CONTENT=“CONTENT”;
最后一个字符串标记\u QUESTION\u CHOSENANSWER=“CHOSENANSWER”;
最终字符串标记_ANSWERS=“ANSWERS”;
最终字符串标记_ANSWER=“ANSWER”;
最终字符串标记\u回答\u CONTENT=“CONTENT”;
最后一个字符串TAG_QUERY=“QUERY”;
最终字符串标记\u COUNT=“COUNT”;
ProgressDialog;
加载所有数据mTask;
JSONArray问题=null;
android.widget.ListView lv;
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
//setContentView(R.layout.listview);
questionList=新的ArrayList();
mTask=new LoadAllData();
mTask.execute();
}
@凌驾
受保护的void onListItemClick(android.widget.ListView l、视图v、int pos、长id){
super.onListItemClick(l、v、pos、id);
HashMap item=问题列表。get(pos);
意向i=新意向(ListView.this,SingleListItem.class);
i、 putExtra(标记问题主题,item.get(标记问题主题));
i、 putExtra(标记问题内容,item.get(标记问题内容));
i、 putExtra(TAG_-QUESTION_-CHOSENANSWER,item.get(TAG_-QUESTION_-CHOSENANSWER));
星触觉(i);
}
@凌驾
public void onBackPressed(){
if(mTask!=null&&mTask.getStatus()!=AsyncTask.Status.FINISHED)
{
mTask.cancel(true);
}
super.onBackPressed();
}
@凌驾
受保护的空onDestroy(){
//TODO自动生成的方法存根
if(mTask!=null&&mTask.getStatus()!=AsyncTask.Status.FINISHED)
{
mTask.cancel(true);
}
super.ondestory();
}
@凌驾
受保护的void onPause(){
//TODO自动生成的方法存根
如果(pDialog!=null)
{
if(pDialog.isShowing())
{
pDialog.disclose();
}
super.onPause();
}
}
类LoadAllData扩展异步任务{
@凌驾
受保护的void onPreExecute(){
super.onPreExecute();
pDialog=newprogressdialog(ListView.this);
pDialog.setMessage(“正在加载数据,请稍候…”);
pDialog.setUndeterminate(假);
pDialog.setCancelable(真);
pDialog.show();
}
受保护的字符串doInBackground(字符串…args){
pDialog.setOnCancelListener(新的DialogInterface.OnCancelListener(){
public void onCancel(DialogInterface对话框){
mTask.cancel(true);
完成();
}
});
试一试{
Intent in=getIntent();
String searchTerm=in.getStringExtra(“标记搜索”);
字符串查询=URLEncoder.encode(搜索词,“utf-8”);
字符串URL=”http://example.com";
JSONPARSER jParser=新的JSONPARSER();
JSONObject json=jParser.readJSONFeed(URL);
试一试{
JSONArray questions=json.getJSONObject(“全部”).getJSONArray(“问题”);
对于(int i=0;i
现在我想问的问题是,如果我将我的AsyncTask
从当前活动中取出,并将其放在另一个文件中,它是否会使我的doInBackGround
方法的执行更快。我问这个问题是因为当我的AsyncTask
执行时,需要相当长的时间才能完成,而且在我的日志中也会出现这种混乱年龄09-24 20:12:55.928:I/Choreographer(824):跳过195帧!应用程序可能在其主线程上做了太多工作。
在执行AsyncTask
时填充了我的整个日志。I j
pDialog.setOnCancelListener(new DialogInterface.OnCancelListener(){
public void onCancel(DialogInterface dialog) {
mTask.cancel(true);
finish();
});