我是新来的Andr​​oid以下是我的code我想在数据库中添加按钮的点击数据，但是当我按一下按钮我的应用程序崩溃 可有人建议我任何解决方案 这里是我的code：

 公共类三延伸活动实现OnClickListener {
按钮BTN;
SQLiteDatabase分贝;
的EditText EDIT1;
的EditText EDIT2;
的EditText EDIT3;

@覆盖
保护无效的onCreate（包冰柱）{
// TODO自动生成方法存根
super.onCreate（冰柱）;
的setContentView（R.layout.mit）;
SQLiteDatabase分贝;
DB = openOrCreateDatabase（doctorinfo.db，SQLiteDatabase.CREATE_IF_NECESSARY，NULL）;
db.setVersion（1）;
db.setLocale（Locale.getDefault（））;
db.setLockingEnabled（真正的）;
最后弦乐CREATE_TABLE_COUNTRIES =CREATE TABLE med_d（+号INTEGER PRIMARY KEY AUTOINCREMENT，+DOC_NAME文本，+DOC_NO文本，+DOC_EMAIL TEXT）;;
//db.execSQL(CREATE_TABLE_COUNTRIES）;
BTN =（按钮）findViewById（R.id.button1）;
EDIT1 =（EditText上）findViewById（R.id.editText1）;
EDIT2 =（EditText上）findViewById（R.id.editText2）;
EDIT3 =（EditText上）findViewById（R.id.editText3）;

btn.setOnClickListener（本）;


}

@覆盖
公共无效的onClick（查看为arg0）{
串D = edit1.getText（）的toString（）。
。串M = edit2.getText（）的toString（）;
。串P = edit3.getText（）的toString（）;

ContentValues​​值=新ContentValues​​（）;
values​​.put（DOC_NAME，D）;
values​​.put（DOC_NO，米）;
values​​.put（DOC_EMAIL，p）的;
//长countryId = db.insert（med_d，空，价值观）;
//尝试 {
db.insertOrThrow（med_d，空，价值观）;
} //赶上（例外五）{
//Log.e("Add错误，e.toString（））;
//e.printStackTrace（）;
//}



}
 

解决方案

SQLITEOPENHELPER CLASS

 包com.db.demo;


进口android.content.Context;
进口android.database.sqlite.SQLiteDatabase;
进口android.database.sqlite.SQLiteOpenHelper;
进口android.provider.BaseColumns;

/ **
 *在{@link SQLiteOpenHelper}的子类，建立数据库的
 *演示。
 *
 * @author尕尔
 * /
公共类DatabaseHelper扩展SQLiteOpenHelper {

公共DatabaseHelper（上下文的背景下）{
    超级（上下文中，CursorDemo，空，1）;
}

@覆盖
公共无效的onCreate（SQLiteDatabase DB）{
    db.execSQL（CREATE TABLE IF NOT EXISTS名（
            + BaseColumns._ID
            +INTEGER PRIMARY KEY AUTOINCREMENT，第一VARCHAR，最后VARCHAR））;
    db.execSQL（INSERT INTO名（第一，最后）VALUES（'约翰'，'李四'））;
    db.execSQL（INSERT INTO名（第一，最后）VALUES（'詹姆斯'，'柯克'））;
}

@覆盖
公共无效onUpgrade（SQLiteDatabase分贝，INT oldVersion，诠释静态网页）{
    //步骤升级数据库新版本...
}
 

}

*的的活动类的*

 包com.db.demo;


进口android.app.ListActivity;
进口android.database.Cursor;
进口android.database.sqlite.SQLiteDatabase;
进口android.os.Bundle;
进口android.provider.BaseColumns;
进口android.widget.CursorAdapter;
进口android.widget.ListView;
进口android.widget.SimpleCursorAdapter;

公共类DataHandlingActivity扩展ListActivity {
    私人SQLiteDatabase数据库;
 字符串字段[] = {第一，最后，BaseColumns._ID};
    私人CursorAdapter的数据源;

@覆盖
公共无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;
    DatabaseHelper帮手=新DatabaseHelper（本）;
    数据库= helper.getReadableDatabase（）;
    光标数据= database.query（名，字段，NULL，NULL，NULL，NULL，
            空值）;

    数据源=新SimpleCursorAdapter（这一点，R.layout.row，数据字段，
            新的INT [] {R.id.first，R.id.last}）;

    ListView的视图= getListView（）;
    view.setHeaderDividersEnabled（真正的）;
    view.addHeaderView（getLayoutInflater（）膨胀（R.layout.row，NULL））;

    setListAdapter（数据源）;
}
 

}

使用像这样的按钮，点击和更改活动课 update SQL数据库ContentValues​​和更新，方法

I am new to Android following is my code I wants to add data in data base on the click of button but when I click on the Button my application crashes can anybody suggest me any solution here is my code:

public class Third extends Activity implements OnClickListener{
Button btn;
SQLiteDatabase db;
EditText edit1;
EditText edit2;
EditText edit3;

@Override
protected void onCreate(Bundle icicle) {
// TODO Auto-generated method stub
super.onCreate(icicle);
setContentView(R.layout.mit);
SQLiteDatabase db;
db = openOrCreateDatabase("doctorinfo.db", SQLiteDatabase.CREATE_IF_NECESSARY, null);
db.setVersion(1);
db.setLocale(Locale.getDefault());
db.setLockingEnabled(true);
final String CREATE_TABLE_COUNTRIES ="CREATE TABLE med_d ("+ "id INTEGER PRIMARY KEY AUTOINCREMENT,"+ "DOC_NAME TEXT,"+ "DOC_NO TEXT,"+ "DOC_EMAIL TEXT);";
//db.execSQL(CREATE_TABLE_COUNTRIES);
btn=(Button)findViewById(R.id.button1);
edit1=(EditText)findViewById(R.id.editText1);
edit2=(EditText)findViewById(R.id.editText2);
edit3=(EditText)findViewById(R.id.editText3);

btn.setOnClickListener(this);


}

@Override
public void onClick(View arg0) {
String d=edit1.getText().toString();
String m=edit2.getText().toString();
String p=edit3.getText().toString();

ContentValues values = new ContentValues();
values.put("DOC_NAME",d );
values.put("DOC_NO",m);
values.put("DOC_EMAIL",p);
//long countryId = db.insert("med_d", null, values);
//try {
db.insertOrThrow("med_d", null,values);
}// catch (Exception e) {
//Log.e("Add Error", e.toString());
//e.printStackTrace();
//}



}

SQLITEOPENHELPER CLASS

package com.db.demo;


import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.provider.BaseColumns;

/**
 * Subclass of the {@link SQLiteOpenHelper} that sets up the database for the
 * demo.
 * 
 * @author Kah
 */
public class DatabaseHelper extends SQLiteOpenHelper {

public DatabaseHelper(Context context) {
    super(context, "CursorDemo", null, 1);
}

@Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL("CREATE TABLE IF NOT EXISTS names ("
            + BaseColumns._ID
            + " INTEGER PRIMARY KEY AUTOINCREMENT, first VARCHAR, last VARCHAR)");
    db.execSQL("INSERT INTO names (first, last) VALUES ('John', 'Doe')");
    db.execSQL("INSERT INTO names (first, last) VALUES ('James', 'Kirk')");
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    // Steps to upgrade the database for the new version ...
}

}

*Activity class*

package com.db.demo;


import android.app.ListActivity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.provider.BaseColumns;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class DataHandlingActivity extends ListActivity{
    private SQLiteDatabase database;
 String fields[] = { "first", "last", BaseColumns._ID };
    private CursorAdapter dataSource;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    DatabaseHelper helper = new DatabaseHelper(this);
    database = helper.getReadableDatabase();
    Cursor data = database.query("names", fields, null, null, null, null,
            null);

    dataSource = new SimpleCursorAdapter(this, R.layout.row, data, fields,
            new int[] { R.id.first, R.id.last });

    ListView view = getListView();
    view.setHeaderDividersEnabled(true);
    view.addHeaderView(getLayoutInflater().inflate(R.layout.row, null));

    setListAdapter(dataSource);
}

}

use something like this in button click and change activity class update sql database with ContentValues and the update-method