小编dev*_*dev的帖子

我的模拟器显示一条消息,表明应用程序意外停止.我无法在代码中找到错误.

这是我的主要类名Database2Activity:

package data.base;

import com.example.phone_no.DBhelper;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class Database2Activity extends Activity {
EditText editText;
DBhelper DB;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button button = (Button)findViewById(R.id.button);
    DB = new DBhelper(Database2Activity.this);
    button.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            String rr = editText.getText().toString();

            DB.open();
             DB.adddata("A", rr, "122");
                DB.getAlldata();
                DB.close();

        } …