Question

当我单击保存按钮而不输入值时，对话框会消失。我想显示对话框以及想要进行验证。如果有人知道，请帮助我。

这是我的代码：

 TextView tvUserName=new TextView(this);
            TextView tvPassword=new TextView(this);
            TextView tvURL=new TextView(this);
            final EditText etUserName=new EditText(this); 
            final EditText etPassword=new EditText(this);
            final AlertDialog.Builder alert = new AlertDialog.Builder(this);    
            LinearLayout login= new LinearLayout(this);
            login.setOrientation(1); //1 is for vertical orientation
            tvUserName.setText(getResources().getString(R.string.username));
            tvPassword.setText(getResources().getString(R.string.password));
            login.addView(tvURL);
            login.addView(etURL);
            login.addView(tvUserName);
            login.addView(etUserName);
            login.addView(tvPassword);
            etPassword.setInputType(InputType.TYPE_CLASS_TEXT |InputType.TYPE_TEXT_VARIATION_PASSWORD);
            login.addView(etPassword);
            alert.setView(login);
            alert.setTitle(getResources().getString(R.string.login));
            alert.setPositiveButton(getResources().getString(R.string.login), new DialogInterface.OnClickListener() {             
                public void onClick(final DialogInterface dialog, int whichButton) {   
                    strUserName=etUserName.getText().toString();
                    XmlUtil.username=strUserName;
                    strPassword=etPassword.getText().toString();
                    strhwdXml=etURL.getText().toString();
                    if((strUserName.length()==0)||(strPassword.length()==0){
    Toast.makeText(getBaseContext(),"Please enter username and password", Toast.LENGTH_SHORT).show();

                    }else {
                        Toast.makeText(getBaseContext(),"Success", Toast.LENGTH_SHORT).show();
                    }

Answer 1

   private void showAlertBox() {
        AlertDialog alertBox = null;
        alertBox = new AlertDialog.Builder(this).create();
        alertBox.setTitle("titleText");
        alertBox.setMessage("messageText");
        alertBox.setCancelable(false);

        LayoutInflater inflater = LayoutInflater.from(this);
        View alert_webview = inflater.inflate(R.layout.alert_layout, null);
        alertBox.setView(alert_webview);
        btnfromlayout = (Button) alert_webview.findViewById(R.id.btnclose);
        btnfromlayout.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // Whatever you want on click...compare
                // if(strUserName.equalsIgnoreCase("") ||
                // strPassword.equalsIgnoreCase("")){
                // Your toast msg
                // }else{
                // cAlert.dismiss();
                // }
                Log.i("Close", "Close");
            }
        });

        alertBox.show();
    }


@Override
    public void onClick(View v) {
        int vId = v.getId();
        switch (vId) {
        case R.id.btnclose:
            //Whatever you want on click...compare
//if(strUserName.equalsIgnoreCase("") || strPassword.equalsIgnoreCase("")){
//Your toast msg
//}else{
//          cAlert.dismiss();
//}
            Log.i("Close", "Close");
            break;
        default:
            break;
        }

    }

R.layout.YOUR_XML_LAYOUT_FILE

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/txtcustmessage"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Txt custom Layout For Alert" />

    <Button
        android:id="@+id/btnclose"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Close Custom" />

</LinearLayout>

///与上面的布局一样，你可以为设计的登录控件创建自己的布局并根据布局和所需的操作设置点击列表器

Answer 2

我认为制作这种AlertDialog的最佳方法是为它制作一个新的自定义布局，就像你为活动做的那样。如果您正在使用setPositiveButton等，则在按下时会关闭默认对话框。

Answer 3

最好还包括按钮而不是使用setpositivebutton。如果你有按钮，那么你可以随心所欲。

android中的警报对话框验证

3 个答案:

R.layout.YOUR_XML_LAYOUT_FILE