如何從 mainActivity 更改 second_xml 中的文本

Question

I am developing the following application in android Studio-
    **user on entering todo  and click add button, it Should add to linear layout with checkbox which 
    is helpful to delete todos.**

my idea: I created a new XML file with textView and CheckBox in single_item.xml  and inflate it to  
         linearlayout which is present in main xml  as shown in 
          below.............................................

problem:  when I clicked the add button , app crashes. 
           I found that this issue is because I added textview.setText(text)  in  java code.
            if I had not added this line , then sample single_element.xml is getting added 
                 LinearLayout.But I needed to content of textview to be set to input 
                 that is given by user in editText as shown.



     I had deleted Most of the code in xml file because Stackoverflow is showing me "It looks like your post is mostly code; please add some more details." ""...............................................
          ..................................................................................................................................................................................................................................................................................................................................................................................

[activity_main.xml][1]
[single_element.xml][2]


[1]: https://i.stack.imgur.com/UhtGJ.png
[2]: https://i.stack.imgur.com/Pcu1O.png

在activity_main.xml我有 LinearLayout、editText 視圖、添加按鈕和刪除按鈕。

LinearLayout  -> id="@+id/linearLayout"
    

EditText        -> android:id="@+id/edit"

<Button        ->android:id="@+id/add_button"
    

single_element.xml

TextView     ->id="@+id/textView"
   
CheckBox    ->id="@+id/checkBox"
    

MainActivity.java

    addButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            LinearLayout linearLayout = (LinearLayout) findViewById(R.id.linearLayout);
            EditText editText = (EditText) findViewById(R.id.edit);
            String text = editText.getText().toString().trim();
            TextView textView = (TextView) findViewById(R.id.textView);
            textView.setText(text);



            LayoutInflater inflater = getLayoutInflater();
            View view = inflater.inflate(R.layout.single_element,null);
            linearLayout.addView(view);
        }
    });
   

提前致謝............................................... ..................................................... ..................................................... ..................................................... ..................................................... ..................................................... ..................................................... ...................................................

Answer 1

您必須將文本框和復選框都放在 activity_main.xml 中，無需創建另一個布局文件（single_element.xml）來添加它們，因為您需要在 MainActivity class 中顯示文本和復選框。 否則，您必須為 single_element.xml 創建另一個活動，例如可以稱為 SingleElementActivity，然后使用意圖將在 EditText 中輸入的數據從 MainActivity 傳遞到此 SingleElementActivity。

請參閱此處如何使用 Intent 將數據從活動傳遞到另一個活動： 如何在 Android 應用程序中的活動之間傳遞數據？