如何从edittext插入数据

Question

我尝试插入db.insert（inputfname，inputlname，inputnickname）;但它的错误。它告诉我 “的方法insertData（EditText上，EditText上，EditText上）是未定义的类型FriendsDB insertActivity.java”你能告诉我请

这是我的代码（Mainactivity） 包融为一体。 example.sqlite;

import java.security.PublicKey; 

import com.example.sqlite.db.FriendsDB; 

import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 

public class insertActivity extends Activity { 
private Context context; 
private FriendsDB db; 
EditText inputfname; 
EditText inputlname; 
EditText inputnickname; 
Button save; 
Button cancle; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.insert_layout); 

    //view matching 
    inputfname = (EditText)findViewById(R.id.fname); 
    inputlname = (EditText)findViewById(R.id.lname); 
    inputnickname = (EditText)findViewById(R.id.nickname); 
    save = (Button)findViewById(R.id.save); 
    cancle = (Button)findViewById(R.id.cancle); 

    //context 
      context = this; 
      db = new FriendsDB(context); 

    //button event 
    save.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      Intent insertData = new Intent(insertActivity.this,FriendsListActivity.class); 
      insertData.putExtra("fname", inputfname.getText().toString()); 
      insertData.putExtra("lname", inputlname.getText().toString()); 
      insertData.putExtra("nickname", inputnickname.getText().toString()); 
      if(insertData!=null){ 
        db.insert(inputfname, inputlname, inputnickname); <<<<<< ERROR 
      } 
     } 
    }); 

这是我FriendsDB代码

package com.example.sqlite.db; 

import java.util.ArrayList; 

import com.example.sqlite.entry.FriendEntry; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 

//ใช้ในการ inert update delete 
public class FriendsDB { 
    private FriendsDBHelper helper; 
private SQLiteDatabase db; 

public FriendsDB(Context context){ 
    helper = new FriendsDBHelper(context); 
    db = helper.getWritableDatabase(); 
} 
//insert 
    public long insert(String fname,String lname,String nickname){ 
     ContentValues values = new ContentValues(); 
     values.put(FriendsDBHelper.TABLE_KEY_FNAME, fname); 
     values.put(FriendsDBHelper.TABLE_KEY_LNAME, lname); 
     values.put(FriendsDBHelper.TABLE_KEY_NICKNAME, nickname); 
     return db.insert(FriendsDBHelper.TABLE_NAME, null ,values); 

    } 
//select all 
    public ArrayList<FriendEntry> selectAll(){ 
     ArrayList<FriendEntry> friends = new ArrayList<FriendEntry>(); 
     // cursor คือ ชุดข้อมูล 
     Cursor cursor = db.rawQuery("SELECT*FROM"+FriendsDBHelper.TABLE_NAME+"WHERE id != ?",new String[]{Integer.toString(0)}); 
     cursor.moveToFirst(); 
     if(cursor.getCount()!=0){ 
      do{ 
       FriendEntry friend = new FriendEntry(); 
        friend.setId(cursor.getInt(cursor.getColumnIndex(FriendsDBHelper.TABLE_KEY_ID))); 
       friend.setFname(cursor.getString(cursor.getColumnIndex(FriendsDBHelper.TABLE_KEY_FNAME))); 
       friend.setLname(cursor.getString(cursor.getColumnIndex(FriendsDBHelper.TABLE_KEY_LNAME))); 
       friend.setNickname(cursor.getString(cursor.getColumnIndex(FriendsDBHelper.TABLE_KEY_NICKNAME))); 
       friends.add(friend); 

      }while(cursor.moveToNext()); 

     } 

     return friends; 
    } 

Answer 1

更改此

db.insert(inputfname, inputlname, inputnickname); 

到

db.insert(inputfname.getText().toString(), inputlname.getText().toString(), inputnickname.getText().toString()); 

你的数据库的插入方法将字符串作为参数。

insert(String fname,String lname,String nickname)// arguments are strings