[Android]取得Dialog中EditText的内容问题

最新推荐文章于 2021-05-27 01:04:54 发布

转载最新推荐文章于 2021-05-27 01:04:54 发布 · 3k 阅读

文章标签：

#dialog #android #layout #input #search #encoding

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本文介绍如何在Android应用中创建自定义的AlertDialog，通过设置EditText来获取用户的输入，并利用Intent进行数据传递。具体步骤包括使用AlertDialog.Builder构造对话框，设置标题、视图及按钮等。

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一、Main Class：
public void search() {
   Builder dialog = new AlertDialog.Builder( this );
   LayoutInflater inflater = (LayoutInflater) this .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
   LinearLayout layout = (LinearLayout)inflater.inflate(R.layout.dialogview, null );
   dialog.setView(layout);
   et_search = (EditText)layout.findViewById(R.id.searchC);
   dialog.setPositiveButton( " 查找 " , new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int which) {
     String searchC = et_search.getText().toString();
     Intent intent = new Intent();
     Bundle bundle = new Bundle();
     bundle.putString( " search " , searchC);
     intent.putExtras(bundle);
     intent.setClass(ViewResultActivity. this , SearchResult. class );
     ViewResultActivity. this .startActivity(intent);
    }
   });

   dialog.setNegativeButton( " 取消 " , new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int which) {

    }

   });
   dialog.show();
}

二、dialogview.xml
<? xml version = " 1.0 " encoding = " utf-8 " ?>
< LinearLayout xmlns:android = " http://schemas.android.com/apk/res/android "
android:orientation = " vertical "
android:layout_width = " fill_parent "
android:layout_height = " fill_parent "
>
< EditText
   android:id = " @+id/searchC "
   styles = " @style/edittext_style1 "
   android:layout_width = " 200px "
   android:layout_height = " wrap_content "
   android:gravity = " left "
    />

</ LinearLayout >

由于Android dialog本身没有提供取得Edittext内容的回调函数，所以需要自己写.....

简单的方法是使用Activity模拟Dialog，有布局更自由，消息传递更方便地优点。

写一个自定义的AlertDialog:

01. AlertDialog.Builder alert = new AlertDialog.Builder(aBrainExploration. this );

02.

03. alert.setTitle(R.string.label_enterOneName);

04.

05.

// Set an EditText view to get user input

06.

final

EditText input =

new

EditText(aBrainExploration.

this

);

07. alert.setView(input);

08.

09. alert.setPositiveButton(

"Ok"

,

10.

new

DialogInterface.OnClickListener() {

11.

public

void

onClick(DialogInterface dialog,

12.

int

whichButton) {

13. Appendable value = input.getText();

14.

// setTitle(value.toString());

15. }

16. });

17.

18. alert.setNegativeButton(

"Cancel"

,

19.

new

DialogInterface.OnClickListener() {

20.

public

void

onClick(DialogInterface dialog,

21.

int

whichButton) {

22.

// Canceled.

23. }

24. });

25.

26. alert.show();