我正在尝试从 CallLog 查询数据并插入数据库。为此，我在服务中创建了一个 CONtentObserver 作为内部类，在 onChange() 方法中，我调用我的方法转到指定的 URI 并查询已更改的数据。
但是，比方说，我接到了一个电话，因此通知了观察者。因此，我的方法转到调用日志内容提供程序、查询和插入，但它是插入两次、三次相同的寄存器。
这是我的服务代码。
public class RatedCallsService extends Service
private Handler handler = new Handler();
private SQLiteDatabase db;
private OpenHelper helper;
private String theDate;
private String theMonth_;
private String theYear_;
private String theDay_;
public static boolean servReg = false;
class RatedCallsContentObserver extends ContentObserver {
public RatedCallsContentObserver(Handler h) {
super(h);
//helper = new OpenHelper(getApplicationContext());
//db = helper.getWritableDatabase();
}
@Override
public boolean deliverSelfNotifications() {
return true;
}
@Override
public void onChange(boolean selfChange) {
super.onChange(selfChange);
Log.i(LOG_TAG, "Inside on Change. selfChange " + selfChange);
searchInsert();
}
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public void onCreate() {
servReg = true;
db = DataHandlerDB.createDB(this);
registerContentObserver();
}
@Override
public void onDestroy() {
super.onDestroy();
db.close();
this.getApplicationContext().getContentResolver().unregisterContentObserver(new RatedCallsContentObserver(handler));
}
private void searchInsert() {
Cursor cursor = getContentResolver().query(
android.provider.CallLog.Calls.CONTENT_URI, null, null, null,
android.provider.CallLog.Calls.DATE + " DESC ");
if (cursor.moveToFirst()) {
int numberColumnId = cursor
.getColumnIndex(android.provider.CallLog.Calls.NUMBER);
int durationId = cursor
.getColumnIndex(android.provider.CallLog.Calls.DURATION);
int contactNameId = cursor
.getColumnIndex(android.provider.CallLog.Calls.CACHED_NAME);
int numTypeId = cursor
.getColumnIndex(android.provider.CallLog.Calls.CACHED_NUMBER_TYPE);
int callTypeId = cursor
.getColumnIndex(android.provider.CallLog.Calls.TYPE);
Date dt = new Date();
int hours = dt.getHours();
int minutes = dt.getMinutes();
int seconds = dt.getSeconds();
String currTime = hours + ":" + minutes + ":" + seconds;
SimpleDateFormat dateFormat = new SimpleDateFormat("M/d/yyyy");
Date date = new Date();
cursor.moveToFirst();
String contactNumber = cursor.getString(numberColumnId);
String contactName = (null == cursor.getString(contactNameId) ? ""
: cursor.getString(contactNameId));
String duration = cursor.getString(durationId);
String numType = cursor.getString(numTypeId);
String callType = cursor.getString(callTypeId);
seconds = Integer.parseInt(duration);
theDate = dateFormat.format(date);
if (theDate.length() == 9) {
theMonth_ = theDate.substring(0, 1);
theDay_ = theDate.substring(2, 4);
theYear_ = theDate.substring(5, 9);
} else if (theDate.length() == 10) {
theMonth_ = theDate.substring(0, 2);
theDay_ = theDate.substring(3, 4);
theYear_ = theDate.substring(6, 10);
} else if (theDate.length() == 8) {
theMonth_ = theDate.substring(0, 1);
theDay_ = theDate.substring(2, 3);
theYear_ = theDate.substring(4, 8);
}
ContentValues values = new ContentValues();
ContentValues values2 = new ContentValues();
values.put("contact_id", 1);
values.put("contact_name", contactName);
values.put("number_type", numType);
values.put("contact_number", contactNumber);
values.put("duration", Utilities.convertTime(seconds));
values.put("date", dateFormat.format(date));
values.put("current_time", currTime);
values.put("cont", 1);
values.put("type", callType);
values2.put("month",
Utilities.monthName(Integer.parseInt(theMonth_)));
values2.put("duration", Utilities.convertTime(seconds));
values2.put("year", theYear_);
values2.put("month_num", Integer.parseInt(theMonth_));
if (!db.isOpen()) {
db = getApplicationContext()
.openOrCreateDatabase(
"/data/data/com.project.myapp/databases/myDb.db",
SQLiteDatabase.OPEN_READWRITE, null);
}
if (duration != "") {
if (Integer.parseInt(duration) != 0) {
String existingMonthDuration = DataHandlerDB
.selectMonthsDuration(theMonth_, theYear_, this);
Integer newMonthDuration;
if (existingMonthDuration != "") {
newMonthDuration = Integer
.parseInt(existingMonthDuration)
+ Integer.parseInt(duration);
values2.put("duration",
Utilities.convertTime(newMonthDuration));
db.update(DataHandlerDB.TABLE_NAME_3, values2,
"year = ?", new String[] { theYear_ });
} else {
db.insert(DataHandlerDB.TABLE_NAME_3, null, values2);
}
db.insert(DataHandlerDB.TABLE_NAME_2, null, values);
}
}
cursor.close();
}
}
public void registerContentObserver() {
this.getApplicationContext()
.getContentResolver()
.registerContentObserver(
android.provider.CallLog.Calls.CONTENT_URI, false,
new RatedCallsContentObserver(handler));
}
}
我已经尝试了一切。注销观察者等，但没有。
最佳答案
我从 android.provider.CallLog.Calls.DATE 中选择了调用的时间戳，在插入之前我检查是否有类似的时间戳，如果有我不插入，如果我没有插入数据。这种值(value)观是独一无二的，因此永远不会有一些相似之处。
关于android - ContentObserver onChange() 重复多次，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6298402/