在Android中的数据库中插入日志详细信息

Question

我想实现一个程序，每次拨打电话或发送短信时都会在数据库中插入详细信息。我应该使用广播接收器或内容观察者或服务吗？什么是合适的？我是 android 新手，急需这方面的帮助。

到目前为止，我已经完成了以下代码。问题是当第一次运行代码时，例如调用日志有 8 条记录，因此这 8 条记录被插入到数据库中。然后，如果通话记录发生任何变化，例如我打了另一个电话，那么数据库中会显示 17 条记录而不是 9 条。请帮忙看看我哪里出错了？

    package com.calllogdb;

import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Date;




import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.content.ContentValues;
import android.database.ContentObserver;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;
import android.view.Menu;
import android.widget.Toast;

//import static android.provider.BaseColumns._ID;
import static com.calllogdb.Constants.KEY_ContactNum ;
import static com.calllogdb.Constants.KEY_ContactName;
import static com.calllogdb.Constants.KEY_Duration;
import static com.calllogdb.Constants.KEY_Date ;
import static com.calllogdb.Constants.KEY_NumType ;
import static com.calllogdb.Constants.KEY_CurrTime ;
import static com.calllogdb.Constants.TABLE_NAME;

public class MainActivity extends Activity {

    private Helper helper = new Helper(this);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
          this.getApplicationContext()
            .getContentResolver()
            .registerContentObserver(
                    android.provider.CallLog.Calls.CONTENT_URI, true,
                    new CallLogObserver(new Handler())); 



        try {

            addLog();
        }
    finally {

        helper.close();
    } 
    }

    private void addLog() {


        // TODO Auto-generated method stub
        SQLiteDatabase db;

         Cursor cursor = getContentResolver().query(
                    android.provider.CallLog.Calls.CONTENT_URI, null, null, null,
                    android.provider.CallLog.Calls.DATE + " DESC ");

    db = helper.getWritableDatabase();


    startManagingCursor(cursor);
    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 dateId = cursor.getColumnIndex(android.provider.CallLog.Calls.DATE);
   int numTypeId = cursor.getColumnIndex(android.provider.CallLog.Calls.CACHED_NUMBER_TYPE);

    Date dt = new Date();
    int hours = dt.getHours();
    int minutes = dt.getMinutes();
    int seconds = dt.getSeconds();
    String currTime = hours + ":" + minutes + ":" + seconds;



    ArrayList<String> callList = new ArrayList<String>();
    if (cursor.moveToFirst()) {
        do {
            String contactNumber = cursor.getString(numberColumnId);
            String contactName = cursor.getString(contactNameId);
            String duration = cursor.getString(durationId);
            String callDate = DateFormat.getDateInstance().format(dateId);
           String numType = cursor.getString(numTypeId);

            ContentValues values = new ContentValues();
            values.put(KEY_ContactName, contactName);
       values.put(KEY_NumType, numType);
            values.put(KEY_ContactNum, contactNumber);
            values.put(KEY_Duration, duration);
            values.put(KEY_Date, callDate);
            values.put(KEY_CurrTime, currTime);

            db.insert(TABLE_NAME, null, values);


            callList.add("Contact Number: " + contactNumber
                    + "\nContact Name: " + contactName + "\nDuration: "
                    + duration + "\nDate: " + callDate);


        } while (cursor.moveToNext());
}
    Toast.makeText(getBaseContext(), "Inserted!", Toast.LENGTH_LONG).show();


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }




    public class CallLogObserver extends ContentObserver
    {



        public CallLogObserver(Handler handler) {
            super(handler);
            // TODO Auto-generated constructor stub
        }


          @Override
            public boolean deliverSelfNotifications() {
                return true;
            }

            @Override
            public void onChange(boolean selfChange) {
                Log.d("LOG_TAG", "MyContentObserver.onChange( " + selfChange
                        + ")");
                super.onChange(selfChange);
                addLog();

            }





    }
}

每当我拨打电话时，它都会收到通知并插入整套记录，而不是仅插入最新的记录。我应该怎么做才能防止这种情况发生？

Answer 1

访问短信/彩信数据库的具体例子，请看gTalkSMS.

this 也可能有帮助..

如果您找不到所有代码，那么this 会提供帮助