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我的申请遇到了一些问题。

我要做的是从通话记录中获取通话记录，将其传递到我的数据库中进行存储，然后在需要显示时检索值。

数据库已创建，但看起来值拒绝插入。下面是我的代码和logcat。

非常感谢您的帮助。

我的主要活动

package com.example.mobilebillforecaster;

import com.example.mbf.R;

import android.app.TabActivity;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.os.Handler;
import android.provider.CallLog;
import android.widget.TabHost;
import android.widget.TextView;

@SuppressWarnings({ "deprecation", "deprecation" })
public class EtiMainScreen extends TabActivity {

SQLiteDatabase calllog;

Handler hand = new Handler();
Cursor cursor;
ContentValues cv;

TextView tvnatmins, tvintmins, tvnatsms;

@SuppressWarnings("deprecation")
protected void onCreate(Bundle Bundle) {
    super.onCreate(Bundle);
    setContentView(R.layout.eti_main_screen);
    TabHost.TabSpec spec = getTabHost().newTabSpec("tag1");

    spec.setContent(R.id.mainmenu);
    spec.setIndicator("Main Menu");
    getTabHost().addTab(spec);

    spec = getTabHost().newTabSpec("tag2");
    spec.setContent(R.id.billhist);
    spec.setIndicator("Billing History");
    getTabHost().addTab(spec);

    getTabHost().setCurrentTab(0);

    tvnatmins = (TextView) findViewById(R.id.tvnatmins);
    tvintmins = (TextView) findViewById(R.id.tvintmins);
    tvnatsms = (TextView) findViewById(R.id.tvnatsms);

    getCallDetails();

}

private void getCallDetails() {

    CallRecords recdb = new CallRecords();

    StringBuffer sb = new StringBuffer();
    Cursor managedCursor = getContentResolver().query(
            CallLog.Calls.CONTENT_URI, null, null, null, null);
    int number = managedCursor.getColumnIndex(CallLog.Calls.NUMBER);
    int type = managedCursor.getColumnIndex(CallLog.Calls.TYPE);
    int duration = managedCursor.getColumnIndex(CallLog.Calls.DURATION);

    while (managedCursor.moveToNext()) {

        String callDuration = managedCursor.getString(duration);

        recdb.open();

        cv.put("CALL_NUMBER", number);
        cv.put("CALL_TYPE", type);
        cv.put("CALL_DURATION", duration);
        recdb.insertValues("Records", cv);
        recdb.close();

        sb.append("" + callDuration);

    }
    managedCursor.close();
    tvnatmins.setText(sb);
}

// tvnatmins.setText(number);
// tvintmins.setText(type);
// tvnatsms.setText(duration);

}

我的数据库

package com.example.mobilebillforecaster;



import android.content.Context;

import android.content.ContentValues;
import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class CallRecords {

private static final int DATABASE_VERSION = 1;
private DatabaseHelper DBhelper;
public SQLiteDatabase callDB;
static final String DATABASE_NAME = "DBLogs";
static final String TABLE_NAME = " Records";

public static final String CALL_ROWID = "_id";
public static final String CALL_NUMBER = "cnumber";
public static final String CALL_DURATION = "cduration";
public static final String CALL_TYPE = "ctype";

Context context;

private static final String Records = "CREATE TABLE " + TABLE_NAME + "("
        + CALL_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + CALL_NUMBER
        + " INTEGER, " + CALL_DURATION + " INTEGER, " + CALL_TYPE
        + " INTEGER" + ");";

private static class DatabaseHelper extends SQLiteOpenHelper {

    public DatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        // TODO Auto-generated method stub
        db.execSQL(Records);

    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // TODO Auto-generated method stub
        db.execSQL("DROP TABLE IF EXISTS" + Records);

    }

}

public CallRecords open() {

    DBhelper = new DatabaseHelper(context);
    callDB = DBhelper.getWritableDatabase();

    return this;

}

public void close() {
    DBhelper.close();
}

public long insertValues(String rectable, ContentValues conValues) {
    return callDB.insert(rectable, null, conValues);

}

public Cursor getAllLogs() {

    String sql = "SELECT CALL_ROWID ,CALL_TYPE , CALL_DURATION, CALL_NUMBER 
FROM Records ";
    Cursor cursor = callDB.rawQuery(sql, null);
    return cursor;

}
}

最后是我的 LOGCAT

04-21 20:42:57.294: E/AndroidRuntime(9388): FATAL EXCEPTION: main
04-21 20:42:57.294: E/AndroidRuntime(9388): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mbf/com.example.mobilebillforecaster.EtiMainScreen}: java.lang.NullPointerException
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.os.Looper.loop(Looper.java:137)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.app.ActivityThread.main(ActivityThread.java:5039)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at java.lang.reflect.Method.invokeNative(Native Method)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at java.lang.reflect.Method.invoke(Method.java:511)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at dalvik.system.NativeStart.main(Native Method)
04-21 20:42:57.294: E/AndroidRuntime(9388): Caused by: java.lang.NullPointerException
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at com.example.mobilebillforecaster.CallRecords.open(CallRecords.java:59)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at com.example.mobilebillforecaster.EtiMainScreen.getCallDetails(EtiMainScreen.java:66)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at com.example.mobilebillforecaster.EtiMainScreen.onCreate(EtiMainScreen.java:47)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.app.Activity.performCreate(Activity.java:5104)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
04-21 20:42:57.294: E/AndroidRuntime(9388):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
04-21 20:42:57.294: E/AndroidRuntime(9388):     ... 11 more

谢谢！

4

1 回答 1

1

在您的cv变更声明中ContentValues cv = new ContentValues();

你需要一个构造函数CallRecords 

public CallRecords(Context context)
{
    this.context = context;
}

更改CallRecords recdb = new CallRecords();
为CallRecords recdb = new CallRecords(this);

于 2013-04-21T21:00:10.813 回答