今天我构建了一个新的应用程序来添加联系人，但我在这样的log cat中有错误：
threadid = 11：线程退出未捕获的异常（group = 0xa4ca6b20）
致命异常：Thread-128
流程：kr.co.composer.callrecord，PID：5275 显示java.lang.NullPointerException
在android.content.ContextWrapper.getContentResolver（ContextWrapper.java:99）
at kr.co.composer.callrecord.page.AddContactActivity.insertContact（AddContactActivity.java:116）
at kr.co.composer.callrecord.callbroadcast.CallBroadcast $ 1.run（CallBroadcast.java:110）
在java.lang.Thread.run（Thread.java:841）
我认为课程insertContact中存在问题：
ContentResolver contentResolver = this.getContentResolver();
检查所有更多代码，此类我从AppCompatActivity扩展：
public boolean insertContact(String firstName, String mobileNumber, String addressCall, String timeStart, String currentDate) {
ContentResolver contentResolver = this.getContentResolver();
ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>();
ops.add(ContentProviderOperation
.newInsert(ContactsContract.RawContacts.CONTENT_URI)
.withValue(ContactsContract.RawContacts.ACCOUNT_TYPE, null)
.withValue(ContactsContract.RawContacts.ACCOUNT_NAME, null)
.build());
ops.add(ContentProviderOperation
.newInsert(ContactsContract.Data.CONTENT_URI)
.withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, 0)
.withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE)
.withValue(ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME, firstName + " " + timeStart + " " + currentDate).build());
ops.add(ContentProviderOperation
.newInsert(ContactsContract.Data.CONTENT_URI)
.withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, 0)
.withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE)
.withValue(ContactsContract.CommonDataKinds.Phone.NUMBER, mobileNumber)
.withValue(ContactsContract.CommonDataKinds.Phone.TYPE, ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE).build());
ops.add(ContentProviderOperation
.newInsert(ContactsContract.Data.CONTENT_URI)
.withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID,
0)
.withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.StructuredPostal.CONTENT_ITEM_TYPE )
.withValue(ContactsContract.CommonDataKinds.StructuredPostal.STREET, addressCall).build());
try {
contentResolver.applyBatch(ContactsContract.AUTHORITY, ops);
} catch (Exception e) {
return false;
}
return true;
}
毕竟，在CallBroadcast中我用所有参数调用了这个类（我插入值不为空）。
InputStream answerInputStream = connection.getInputStream();
final String answer = getTextFromInputStream(answerInputStream);
if(answer!="") {
String[] contactInfo = answer.split(":::::");
contact.insertContact(contactInfo[0], contactInfo[1], contactInfo[2], contactInfo[3], contactInfo[4]);
}
answer的值为：
Alisan:::::".$text.":::::10p.m at Yusski street:::::25/03/2015:::::28/03/2015
在class CallBroadcast extends BroadcastReceiver我调用insertContact方法。您可以在下面看到更多代码：
public class CallBroadcast extends BroadcastReceiver {
public void sendToServer(final String text){
contact = new AddContactActivity();
new Thread(new Runnable() {
@Override
public void run() {
try {
String textparam = "text1=" + URLEncoder.encode(text, "UTF-8");
URL scripturl = new URL(scripturlstring);
HttpURLConnection connection = (HttpURLConnection) scripturl.openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setFixedLengthStreamingMode(textparam.getBytes().length);
OutputStreamWriter contentWriter = new OutputStreamWriter(connection.getOutputStream());
contentWriter.write(textparam);
contentWriter.flush();
contentWriter.close();
InputStream answerInputStream = connection.getInputStream();
final String answer = getTextFromInputStream(answerInputStream);
if(answer!="") {
String[] contactInfo = answer.split(":::::");
contact.insertContact(contactInfo[0], contactInfo[1], contactInfo[2], contactInfo[3], contactInfo[4]);
}
answerInputStream.close();
connection.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
}
@Override
public void onReceive(final Context context, final Intent intent) {
callState = 0;
callInfoPreferenceManager = CallInfoPreferenceManager.getInstance();
configPreferenceManager = ConfigPreferenceManager.getInstance();
TelephonyManager telManager = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
if (configPreferenceManager.getAutoRecord()) {
if (intent.getAction().equals(Intent.ACTION_NEW_OUTGOING_CALL)) {
String textToServer = callInfoPreferenceManager.getPhoneNumber();
sendToServer(textToServer.toString());
Log.i("Gọi đến đã gửi->server:", textToServer.toString());
callInfoPreferenceManager.setPhoneNumber(intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER));
callInfoPreferenceManager.setMyPhone(number);
callInfoPreferenceManager.setSending(String.valueOf(true));
}
}
telManager.listen(new PhoneStateListener() {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
callDAO = new CallDAO(context);
if (configPreferenceManager.getAutoRecord()) {
if (state != pState) {
if (state == TelephonyManager.CALL_STATE_OFFHOOK && callInfoPreferenceManager.getCallState()) {
uri = Uri.withAppendedPath(
ContactsContract.PhoneLookup.CONTENT_FILTER_URI,
Uri.encode(callInfoPreferenceManager.getPhoneNumber()));
projection = new String[]{ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME
, ContactsContract.Contacts.PHOTO_ID
};
// Query the filter URI
Cursor cursor = context.getContentResolver().query(uri,
projection, null, null, null);
if (cursor != null) {
if (cursor.moveToFirst()) {
callInfoPreferenceManager.setName(cursor.getString(cursor.getColumnIndex
(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)));
int id = cursor.getInt(cursor.getColumnIndex(ContactsContract.Contacts.PHOTO_ID));
if (id != 0) {
callInfoPreferenceManager.setPhotoId(id);
} else {
callInfoPreferenceManager.setPhotoId(1);
}
} else {
callInfoPreferenceManager.setPhotoId(1);
callInfoPreferenceManager.setName("Số lạ");
}
}
cursor.close();
callInfoPreferenceManager.setCallState(CALLING);
callInfoPreferenceManager.setStartDate(DateFormat.format(
CallFormatter.START_DATE_FORMAT,
System.currentTimeMillis()).toString());
callInfoPreferenceManager.setStartTime(System
.currentTimeMillis());
try {
Thread.sleep(1000); //1000 milliseconds is one second.
} catch(InterruptedException ex) {
Thread.currentThread().interrupt();
}
sIntent = new Intent(context.getApplicationContext(),
CallRecordService.class);
context.startService(sIntent);
} else if (state == TelephonyManager.CALL_STATE_RINGING && callInfoPreferenceManager.getCallState()) {
callInfoPreferenceManager.setPhoneNumber(incomingNumber);
String textToServer = callInfoPreferenceManager.getPhoneNumber();
sendToServer(textToServer.toString());
callInfoPreferenceManager.setSending(String.valueOf(false));
} else if (state == TelephonyManager.CALL_STATE_IDLE && callInfoPreferenceManager.getCallState() == CALLING) {
long endTime = System.currentTimeMillis();
long startTime = callInfoPreferenceManager.getStartTime();
long callTime = endTime - startTime;
String totalTime = new SimpleDateFormat(
CallFormatter.TIME_FORMAT).format(new Date(
callTime - 32400000));
callDAO.insert(callInfoPreferenceManager.getName(),
callInfoPreferenceManager.getPhoneNumber(),
callInfoPreferenceManager.getStartDate(),
totalTime,
callInfoPreferenceManager.getSending(),
callInfoPreferenceManager.getPhotoId(),
callInfoPreferenceManager.getStartDate()
+ configPreferenceManager.getPathFormat());
callDAO.close();
sIntent = new Intent(context.getApplicationContext(),
CallRecordService.class);
context.stopService(sIntent);
callInfoPreferenceManager.setCallState(IDLE);
try {
Thread.sleep(1000); //1000 milliseconds is one second.
} catch(InterruptedException ex) {
Thread.currentThread().interrupt();
}
} else if (state == TelephonyManager.CALL_STATE_RINGING &&
callInfoPreferenceManager.getCallState() == CALLING) {
callState = REFUSE;
} else if (state == TelephonyManager.CALL_STATE_OFFHOOK && callInfoPreferenceManager.getCallState()
== CALLING) {
callState = ACCEPT;
} else if (state == TelephonyManager.CALL_STATE_IDLE && callState == REFUSE) {
callInfoPreferenceManager.setCallState(IDLE);
}
pState = state;
}
}
}
}, PhoneStateListener.LISTEN_CALL_STATE);
}//onReceive
我检查了您的答案，但是在编辑我的代码时，一个班级也在调用insertContact，我尝试添加onCreate(Context context, Bundle savedInstanceState)，但无法使用参数Context context的传递。这段代码在：
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_contact);
addContactBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (insertContact(name, number, address, timeStart, timeCurrrentDate)) {
}
}
}
}
}
答案 0 :(得分：3)
getContentResolver()是类android.content.Context的方法，因此它肯定需要一个Context实例（如Activity或Service）。 这是导致崩溃的原因。
您正在致电
ContentResolver contentResolver = this.getContentResolver();
此处this应该是Context的子类的实例。如果您已经从activity调用了此内容，请确保在onCreate activity activity方法之后调用它，因为到那时context类没有Broadcast Receiver }。
编辑1：
由于您使用的是context，因此您应该通过此处收到的onReceive (Context context, Intent intent){}：
sentToServer
更改此public void sendToServer( Context context, final String text)的{{1}}方法的签名，并通过onReceive从context致电。
@Override
public void onReceive (Context context, Intent intent){
sendToServer(context, "some text")
}
同样，更改insertContact方法public boolean insertContact(Context context, String firstName, String mobileNumber, String addressCall, String timeStart, String currentDate)
得到ContentResolver这样：
ContentResolver contentResolver = context.getContentResolver();
希望这会帮助你！