Java 动态删除LinearLayout中的EditText字段

我的问题是，一旦我的editText字段被创建，我不知道如何用我应用程序中的另一个按钮逐个删除它们。我不太理解android:id元素，因为它与java代码中的setID（）有关。我想我的主要问题是，如果我不知道动态创建的editText视图的id，如何确定它们的目标。这是我的代码，非常感谢您的帮助：

爪哇：

XML:

工具：context=“com.zdowning.decisionmaker.MainActivity”>

在

android:id

和您的

setID

之间没有关系

了解更多关于这方面的信息

无论如何，删除生成的线的一种方法可以基于LinearLayout的子索引，如下所示：

private LinearLayout mEditTextContainer;

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...
    mEditTextContainer = (LinearLayout)findViewById(R.id.linearLayoutDecisions);
    ...
}

public void addLine() {
    // add edittext
    EditText et = new EditText(this);
    LinearLayout.LayoutParams p = new
            LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.WRAP_CONTENT);
    et.setLayoutParams(p);
    et.setText("Enter Answer #" + (mEditTextContainer.getChildCount()+1));
    mEditTextContainer.addView(et);
    Toast.makeText(MainActivity.this, "1", Toast.LENGTH_LONG).show();
}

public void removeLine() {
    mEditTextContainer.removeViewAt(mEditTextContainer.getChildCount()-1);
}

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#d4cfcd">
tools:context="com.zdowning.decisionmaker.MainActivity">


<LinearLayout
    android:id="@+id/linearLayoutMain"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:gravity="center"
        android:hint="Enter Your Question Here"
        android:layout_marginBottom="20dp"
        android:layout_marginTop="20dp"/>

    <LinearLayout
        android:id="@+id/linearLayoutDecisions"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

    <EditText
        android:id="@+id/editText3"
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:gravity="center"
        android:hint="Enter Answer #2" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:gravity="center"
        android:hint="Enter Answer #1" />

    <EditText
        android:id="@+id/editText4"
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:gravity="center"
        android:hint="Enter Answer #3" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:gravity="center">

        <Button
            android:id="@+id/add_button"
            style="?android:attr/borderlessButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:text="+"
            android:textColor="@android:color/background_light"
            android:textSize="18sp"/>

        <View
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:layout_weight="1" />

        <Button
            android:id="@+id/remove_button"
            style="?android:attr/borderlessButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:text="-"
            android:textColor="@android:color/background_light"
            android:textSize="18sp"
            android:layout_margin="10dp"/>
    </LinearLayout>

    <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">
    <Button
        android:id="@+id/button"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@color/colorPrimary"
        android:text="DECIDE!"
        android:textColor="@android:color/background_light"
        android:textSize="18sp"
        android:layout_centerInParent="true" />
    </RelativeLayout>

    <TextView
        android:id="@+id/textView7"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_margin="20dp"
        android:textColor="@android:color/black"
        android:textSize="36sp" />

</LinearLayout>
</android.support.constraint.ConstraintLayout>

private LinearLayout mEditTextContainer;

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...
    mEditTextContainer = (LinearLayout)findViewById(R.id.linearLayoutDecisions);
    ...
}

public void addLine() {
    // add edittext
    EditText et = new EditText(this);
    LinearLayout.LayoutParams p = new
            LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.WRAP_CONTENT);
    et.setLayoutParams(p);
    et.setText("Enter Answer #" + (mEditTextContainer.getChildCount()+1));
    mEditTextContainer.addView(et);
    Toast.makeText(MainActivity.this, "1", Toast.LENGTH_LONG).show();
}

public void removeLine() {
    mEditTextContainer.removeViewAt(mEditTextContainer.getChildCount()-1);
}