Android异步任务类挂起我的应用程序为什么

Question

i调用MyTask((.execute((；在我的应用程序中MainAcivity类的onCreate((中。it Busy or Hang my application long time。请帮我为什么？我希望我的工作在后台，这样它就不会干扰我的应用程序。为什么我的应用程序变得繁忙且无响应？类别代码如下：

private class MyTask extends AsyncTask<String, Integer, String> {
// Runs in UI before background thread is called
@Override
protected void onPreExecute() {
super.onPreExecute();

// Do something like display a progress bar
}
// This is run in a background thread
@Override
protected String doInBackground(String... params) {

checkUser();
return "";
}
// This is called from background thread but runs in UI
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
// Do things like update the progress bar
}
// This runs in UI when background thread finishes
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
// Do things like hide the progress bar or change a TextView
}
}

checkUser((方法代码低于

private void checkUser(){
// now here we convert this list array into json string

final String server_url="http://www.xxxx.com/TruCaller/check_user.php"; // url of server check this 100 times it must be working

// volley
StringRequest stringRequest=new StringRequest(Request.Method.POST, server_url,
new Response.Listener<String>() {
@Override
public void onResponse(String response)
{
final String result=response.toString().trim();
if(result.equals("not found")){
//Toast.makeText(MainActivity.this,"Wait...",Toast.LENGTH_LONG).show();
//   Log.d("responsedd", "result not found fffffffff: "+result);
getContacts2();
}else{
}
// Log.d("responsedd", "result : "+result); //when response come i will log it
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error)
{
error.printStackTrace();
error.getMessage(); // when error come i will log it
}
}
)
{
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String>  params = new HashMap<String, String>();
params.put("identifier", UIDD);
Log.d("responsedd", "result not found ggggggggggg: "+ UIDD);
return params;
}
};
Vconnection.getnInstance(this).addRequestQue(stringRequest); // vConnection i claas which used to connect volley

}

getContacts2((方法代码如下：

public void getContacts2() {
if (!mayRequestContacts()) {
return;
}
// contactList = new ArrayList<String>();
String phoneNumber = null;
String email = null;
Uri CONTENT_URI = ContactsContract.Contacts.CONTENT_URI;
String _ID = ContactsContract.Contacts._ID;
String DISPLAY_NAME = ContactsContract.Contacts.DISPLAY_NAME;
String HAS_PHONE_NUMBER = ContactsContract.Contacts.HAS_PHONE_NUMBER;
Uri PhoneCONTENT_URI = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
String Phone_CONTACT_ID = ContactsContract.CommonDataKinds.Phone.CONTACT_ID;
String NUMBER = ContactsContract.CommonDataKinds.Phone.NUMBER;
Uri EmailCONTENT_URI = ContactsContract.CommonDataKinds.Email.CONTENT_URI;
String EmailCONTACT_ID = ContactsContract.CommonDataKinds.Email.CONTACT_ID;
String DATA = ContactsContract.CommonDataKinds.Email.DATA;
StringBuffer output;
ContentResolver contentResolver = getContentResolver();
cursor = contentResolver.query(CONTENT_URI, null, null, null, null);
// Iterate every contact in the phone
if (cursor.getCount() > 0) {
counter = 0;
while (cursor.moveToNext()) {
output = new StringBuffer();

String contact_id = cursor.getString(cursor.getColumnIndex(_ID));
String name = cursor.getString(cursor.getColumnIndex(DISPLAY_NAME));
String phoneC = "", adressC = "", emailC = "",country_code="";
int hasPhoneNumber = Integer.parseInt(cursor.getString(cursor.getColumnIndex(HAS_PHONE_NUMBER)));
Bitmap bitmap = null;
String image = "";
if (hasPhoneNumber > 0) {


////////////////////Phone numbers with this name..... 2 Testing ....////////////////
String phoneNumber2 = "";
final String[] projection = new String[]{ContactsContract.CommonDataKinds.Phone.NUMBER, ContactsContract.CommonDataKinds.Phone.TYPE,};
final Cursor phone = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, projection, ContactsContract.Data.CONTACT_ID + "=?", new String[]{String.valueOf(contact_id)}, null);
if (phone.moveToFirst()) {
final int contactNumberColumnIndex = phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DATA);
phoneC = "";
while (!phone.isAfterLast()) {
////////////////////////////////////////////
String x = phone.getString(contactNumberColumnIndex);
bitmap = retrieveContactPhoto(MainActivity.this, x);
String countryCode = countryCode(phone.getString(contactNumberColumnIndex));
country_code = countryCode;
// String swissNumberStr = "03348633664";
PhoneNumberUtil phoneUtil = PhoneNumberUtil.createInstance(getApplicationContext());
Phonenumber.PhoneNumber pNumberProto;
String phoneVerfid="";
try {
pNumberProto = phoneUtil.parse(phone.getString(contactNumberColumnIndex), countryCode);
//   System.err.println("NumberParseException was thrown:>>>>>>>>>>>> " + pNumberProto);
boolean isValid = phoneUtil.isValidNumber(pNumberProto);
if(isValid){
System.out.println(phoneUtil.format(pNumberProto, PhoneNumberUtil.PhoneNumberFormat.INTERNATIONAL));
phoneVerfid = phoneUtil.format(pNumberProto, PhoneNumberUtil.PhoneNumberFormat.E164);
}
} catch (NumberParseException e) {
// System.err.println("NumberParseException was thrown: " + e.toString() +"   ???" +phone.getString(contactNumberColumnIndex) + countryCode);
}
///////////////////////////////
phoneNumber2 = phoneVerfid + "_";
//   output.append("n Phone number:" + phoneNumber2);
phoneC = phoneC  + phoneNumber2;
//  System.out.println("Country = "+countryCode(phoneNumber2) + "  p= " +phoneNumber2);
phone.moveToNext();
}
}
phone.close();

/////////////////////////////////////////////////////////////
// Read every email id associated with the contact
Cursor emailCursor = contentResolver.query(EmailCONTENT_URI, null, EmailCONTACT_ID + " = ?", new String[]{contact_id}, null);
emailC = "";
email = "";
while (emailCursor.moveToNext()) {
email = emailCursor.getString(emailCursor.getColumnIndex(DATA)) + "%";
if (!emailC.contains(email)) {
emailC = emailC  + email;
//  output.append("n Email:" + email);
}
}
emailCursor.close();

//////////// Adresss//////
String postalData = "";
String addrWhere = ContactsContract.Data.CONTACT_ID + " = ? AND " + ContactsContract.Data.MIMETYPE + " = ?";
String[] addrWhereParams = new String[]{String.valueOf(contact_id), ContactsContract.CommonDataKinds.StructuredPostal.CONTENT_ITEM_TYPE};
Cursor addrCur = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, addrWhere, addrWhereParams, null);
if (addrCur.moveToFirst()) {
postalData = addrCur.getString(addrCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.FORMATTED_ADDRESS));
//output.append("n Address:" + postalData);
adressC = adressC + " " + postalData;
}
addrCur.close();

}
if (phoneC != "") {
if (bitmap != null) {
Bitmap bitmap1 = getResizedBitmap(bitmap,210);
image = getStringImage(bitmap1);
if(bitmap1!=null) {
bitmap1.recycle();
}
// System.out.println("KKKKKKKKKKKKKKKKKKK >>>>>>>>> "+image);
}
Contact_Details dt = new Contact_Details(name, phoneC, UIDD, country_code, image, emailC, adressC);
dataArray.add(dt);
if(bitmap!=null){ bitmap.recycle();}
image = "";
}
}

submit1User2Contacs();

}
}

MainAcivity onCreate方法：

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
new MyTask().execute();}

Answer 1

看起来您还没有为游标对象调用close方法。调用cursor.close((将解决您的问题

Answer 2

我尝试下面的代码，而不是新的MyTask((.execute((类。下面的代码对我有用。我也用xxx.run((尝试了下面的代码；方法而不是start((；。run((方法也不起作用。仅使用xxx.start((的线程；工作。所以正确的代码在1以下。谢谢每一个人。

new Thread(new Runnable(){
@Override
public void run() {
//my method
checkUser();
}
}).start();