Android AsyncTask类挂起了我的应用程序为什么?
我调用MyTask().execute();在我的应用程序中MainAcivity类的onCreate()中。它很忙或挂起我的申请很长时间。请帮帮我为什么?我希望我的工作在后台,这样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? 课程代码如下:Android AsyncTask类挂起了我的应用程序为什么?,android,multithreading,android-asynctask,loading,contacts,Android,Multithreading,Android Asynctask,Loading,Contacts,我调用MyTask().execute();在我的应用程序中MainAcivity类的onCreate()中。它很忙或挂起我的申请很长时间。请帮帮我为什么?我希望我的工作在后台,这样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? 课程代码如下: private class MyTask extends AsyncTask<String, Integer, String> { // Runs in UI before background thread is
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
}
}
看起来您还没有为游标对象调用close方法。
调用cursor.close()将解决您的问题我尝试使用下面的代码,而不是新的MyTask().execute()类。下面的代码适用于我。我还尝试使用xxx.run()编写以下代码;方法而不是start();。run()方法也不起作用。仅包含xxx.start()的线程;工作。所以正确的代码在1下面。谢谢大家
new Thread(new Runnable(){
@Override
public void run() {
//my method
checkUser();
}
}).start();
在你发布的堆积如山的代码中,你实际上并没有在任何地方调用MyTask.execute。我在我的主要活动中调用它。我只是不在这里发帖,因为没有need@IbadUrRahman是的。。。请把密码寄出去,我寄出去。现在请检查一下,我在你的屏幕上看到的是,你没有关闭最外层的光标。我看你的申请没有其他人被绞死。
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();
}
}
@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();}
new Thread(new Runnable(){
@Override
public void run() {
//my method
checkUser();
}
}).start();