安卓开发：写入数据库

public void showPwdDialog(final String pwd){ AlertDialog.Builder dialog=new AlertDialog.Builder(MainActivity.this); dialog.setTitle("密码"); dialog.setIcon(R.drawable.icon); dialog.setCancelable(false); View view=LayoutInflater.from(MainActivity.this).inflate(R.layout.inflater_checkdialog, null); final EditText pwd1 = (EditText) view.findViewById(R.id.checkdialog_pwd1); Button ok=(Button) view.findViewById(R.id.checkdialog_ok); Button cancel=(Button) view.findViewById(R.id.checkdialog_cancel); ok.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { String str=pwd1.getText().toString().trim(); if(str.equals(pwd)){ ad.dismiss(); }else{ Toast.makeText(MainActivity.this, "密码错误", 3000).show(); pwd1.setText(""); } } });