小编Jyo*_*dey的帖子

我想从一个活动转移到另一个活动(使用虚拟设备).当我点击按钮移动时,我的模拟器会显示一个对话框unfortunately SMS1 has stopped working(SMS1是我的应用程序名称).

任何人都可以帮我纠正我的代码吗？

MainActivity.java:

package com.example.sms1;

 import android.os.Bundle;
 import android.app.Activity;
 import android.content.Intent;
 import android.view.Menu;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.TextView;

 public class MainActivity extends Activity implements OnClickListener
 {

Button b1;
TextView tv1;
 @Override
 protected void onCreate(Bundle savedInstanceState)
 {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    b1 = (Button) findViewById(R.id.button1);
    tv1 = (TextView) findViewById(R.id.textView1);

    b1.setOnClickListener(this);

 }

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

单击插入按钮时发生以下错误

*错误:android.database.sqlite.SQLiteException; 靠近"student_name"; 语法错误(代码1); 编译时:CREATE TABLE IF NOT EXISTS studentTable(_id TEXT PRIMARY KEY student_name TEXT NOT NULL student_rollno TEXT NOT NULL);*

编码

DbActivity.java

package com.example.a;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;


public class DbActivity  {
public static final String KEY_ID = "_id";
public static final String KEY_NAME = "student_name";
public static final String KEY_ROLLNO = "student_rollno";


private static final String DATABASE_NAME= "Studentdb";
private static final int DATABASE_VERSION  = 1;
private static …