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我从 CallLog 中获取联系人,并使用带有 ContentObserver 的服务将其插入数据库。因此,ContentObserver 会继续观察 CallLog 是否发生了一些新变化,如果是,则在 onChange() 方法中调用获取 CallLog 中的数据并将其插入数据库的方法。

但是,问题是,如果我打一个新的电话,有一个新数据,所以,它必须插入到数据库中,只有一个新行,但它插入了 3 行。我不知道为什么。我在 Android 2.3 Emulator 上对其进行了测试,在模拟器上它还可以,但在真正的 2.3 设备上它会发生。在 2.1 模拟器中它也会发生。

所以这是我的代码。该服务已发布。谢谢!

这是服务MyApplicationService.java

public class MyApplicationService extends Service {

    private Handler handler = new Handler();
    private SQLiteDatabase db;
    private OpenHelper helper;

    class MyApplicationContentObserver extends ContentObserver {

        public MyApplicationContentObserver(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);         
            searchInsert();
        }
    }

    @Override
    public IBinder onBind(Intent arg0) {

        return null;

    }

    @Override
    public void onCreate() {

        db = DataHandlerDB.createDB(this);
        registerContentObservers();

    }

    @Override
    public void onDestroy() {

        db.close();

    }

    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);

            ContentValues values = 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", duration);
            values.put("date", dateFormat.format(date));
            values.put("current_time", currTime);
            values.put("cont", 1);
            values.put("type", callType);

            if (!db.isOpen()) {
                db = getApplicationContext()
                        .openOrCreateDatabase(
                                "/data/data/com.myapp.app/databases/my_database.db",
                                SQLiteDatabase.OPEN_READWRITE, null);
            }
            db.insert(DataHandlerDB.TABLE_NAME_2, null, values);
            cursor.close();

        }

    }

    public void registerContentObservers() {

        this.getApplicationContext()
                .getContentResolver()
                .registerContentObserver(
                        android.provider.CallLog.Calls.CONTENT_URI, true,
                        new MyApplicationContentObserver(handler));

    }

}
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