Question

我想创建n个EditText个对象...所以我使用LayoutInflater在循环中执行此操作，该循环一直运行到n ...将视图添加到布局中但是如果我想为每个addTextChangedListener()对象添加一个EditText，只将侦听器添加到最后一个对象......这是一个关闭问题，我该如何解决？

    LinearLayout ll=(LinearLayout) findViewById(R.id.i1);
    LayoutInflater li=(LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);
    for(int i=0;i<3;i++){
        v=li.inflate(R.layout.addit, null); //v is a View declared as private member of the class
        t=(TextView) v.findViewById(R.id.a1);//t is TextView declared as private member 
        EditText e=(EditText) v.findViewById(R.id.e1);
        e.addTextChangedListener(new TextWatcher() {

            public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {

            }

            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                    int arg3) {

            }

            public void afterTextChanged(Editable arg0) {
                ret(v, t);
            }
        });
        ll.addView(v);

    }

退回功能

   public void ret(View v,TextView t){
    EditText e=(EditText) v.findViewById(R.id.e1);
    t.setText(e.getText());

}

主要xml ：

   <?xml version="1.0" encoding="utf-8"?>

   <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"  
     android:id="@+id/i1"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical" >

  </LinearLayout>

addit.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/l2"
android:layout_width="match_parent"
android:layout_height="100dp"
android:orientation="vertical" >
<TextView
    android:id="@+id/a1"
    android:layout_width="fill_parent"
    android:layout_height="40dp"
    android:text="" />
<EditText
    android:id="@+id/e1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:inputType="textPersonName" >

    <requestFocus />
</EditText>

</LinearLayout>

监听器只监听最后EditText个视图中的更改...如何使其听取所有三个EditText视图？

Answer 1

这是因为您的v和t变量会在每个循环中被覆盖，使它们指向最后一个View和TextView。

尝试将代码更改为：

final View v=li.inflate(R.layout.addit, null);
final TextView t=(TextView) v.findViewById(R.id.a1);

Answer 2

请执行以下操作。

     edit_ll = (LinearLayout) findViewById(R.id.EditLinearLayout);

     addEditText();

     private void addEditText() {

        LayoutInflater li = (LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);
        for(int i = 0; i < 3; i++) {
            View v = li.inflate(R.layout.addit, null);
            EditText e = (EditText) v.findViewById(R.id.e1);
            e.addTextChangedListener(new TextWatcher() {

                public void afterTextChanged(Editable s) {
                    // TODO Auto-generated method stub

                }

                public void beforeTextChanged(CharSequence s, int start,
                    int count, int after) {
                   // TODO Auto-generated method stub

                }

                public void onTextChanged(CharSequence s, int start,
                    int before, int count) {
                    // TODO Auto-generated method stub

                   System.out.println("--change--");
                }

            });
            edit_ll.addView(v);
        }


    }

它获取所有ediText onTextChangeListener。试试吧。

将addTextChangedListener（）添加到循环中创建的每个EditText对象

2 个答案: