0

我有一个使用自定义布局的 AlertDialog。在 OnClick 事件中,我想读取用户输入的内容,所以我这样做:

//Login Dialog
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            // Get the layout inflater
            LayoutInflater inflater = this.getLayoutInflater();

            // Inflate and set the layout for the dialog
            // Pass null as the parent view because its going in the dialog layout
            builder.setView(inflater.inflate(R.layout.dialog_signin, null))
            .setPositiveButton(R.string.tvLoginTitle, new DialogInterface.OnClickListener() {
                   @Override
                   public void onClick(DialogInterface dialog, int id) {
                       String username = ((EditText)findViewById(R.id.loginUsername)).getText().toString();
                       String password = ((EditText)findViewById(R.id.loginPassword)).getText().toString();
                       System.out.println(username);
                       System.out.println(password);
                       ConnectionID.loginToServer(cMainActivity, username, password);
                   }
               })
               .setNegativeButton(R.string.btnExit, new DialogInterface.OnClickListener() {
                   public void onClick(DialogInterface dialog, int id) {
                       System.exit(0);

                   }
               }).show();  

但是当我想阅读里面的内容时,我总是得到一个 NullPointerException 来自 dialog_signin 的布局看起来像:

<EditText
    android:id="@+id/loginUsername"
    android:inputType="textEmailAddress"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="16dp"
    android:layout_marginLeft="4dp"
    android:layout_marginRight="4dp"
    android:layout_marginBottom="4dp"
    android:hint="@string/tvUsername" />
<EditText
    android:id="@+id/loginPassword"
    android:inputType="textPassword"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="4dp"
    android:layout_marginLeft="4dp"
    android:layout_marginRight="4dp"
    android:layout_marginBottom="16dp"
    android:fontFamily="sans-serif"
    android:hint="@string/tvPassword"/>
4

3 回答 3

0

如果用户名和密码是属于对话框的字段,则应按以下代码所示进行:

编辑:

View v = inflater.inflate(R.layout.dialog_signin, null);
builder.setView(v); 
String username = ((EditText)v.findViewById(R.id.loginUsername)).getText().toString();       
String password = ((EditText)v.findViewById(R.id.loginPassword)).getText().toString();
于 2012-11-06T12:11:01.183 回答
0

使用以下内容:

View v=inflater.inflate(R.layout.dialog_signin, null);

并替换:

String username = ((EditText)findViewById(R.id.loginUsername)).getText().toString();
String password = ((EditText)findViewById(R.id.loginPassword)).getText().toString();

String username = ((EditText)v.findViewById(R.id.loginUsername)).getText().toString();
String password = ((EditText)v.findViewById(R.id.loginPassword)).getText().toString();
于 2012-11-06T12:14:25.663 回答
0

与 Dialog 一起使用,如下所示,它将很有用并且对我有用,

Dialog builder = new Dialog(this);
builder.setContentView(R.layout.dialog_signin);


String username = ((EditText)builder.findViewById(R.id.loginUsername)).getText().toString();
String password = ((EditText)builder.findViewById(R.id.loginPassword)).getText().toString();

//Your buttons

builder.show();
于 2012-11-06T12:19:14.953 回答