导读：txtpwd=(EditText)findViewById(R.id.txtPassword); if (TextUtils.isEmpty(txtpwd.getText().toString())) { new AlertDialog.Builder(this) .setMessage(请输入系统密码！) .setPositiveButton(确定......
txtpwd=(EditText)findViewById(R.id.txtPassword);
if (TextUtils.isEmpty(txtpwd.getText().toString())) {
new AlertDialog.Builder(this)
.setMessage("请输入系统密码！")
.setPositiveButton("确定",
new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialoginterface, int i) {
setResult(RESULT_OK);
}
})
.show();
}
