Android自定义编辑文本值被另一个自定义编辑文本更改 [英] Android custom edit text value is changed by another custom edit text
问题描述
在我的一个项目中，我试图创建带有标题和一些自定义验证的自定义EditText.当我通过屏幕旋转和活动娱乐功能测试此自定义视图时，遇到了一个奇怪的问题.
In one of my project I tried to create custom EditText with header and some custom validations. I came into a strange problem when I tested this custom view with screen rotation and activity recreation.
应用程序启动时，所有编辑文本均具有从活动静态设置的正确值.如下图所示:
When app starts all edit text have correct values which were set statically from activity. As on picture bellow:
旋转屏幕或重新创建活动后，EditText的值将被弄乱.CustomEditText值设置为XML中最后一个编辑文本的值.正常设置简单的(Basic Android EditText)编辑文本值.
After I rotate screen or recreate activity EditText's values will be messed up. CustomEditText values are set to value of last edit text in XML. Simple (Basic Android EditText) edit text values are set normally.
我从发生此问题的项目中复制了代码.
I copied codes from project where this problem occurs.
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
first_custom_edit_text.header = "First header"
first_custom_edit_text.setText("First text")
third_custom_edit_text.header = "Third header"
third_custom_edit_text.setText("Third text")
first_simple_edit_text.setText("First simple - Not affected")
second_custom_edit_text.header = "Second header"
second_custom_edit_text.setText("Second text")
second_simple_edit_text.setText("Second simple - Not affected")
}
}
CustomEditText
class CustomEditText : LinearLayout {
fun setText(value: String?){
this.input_edit_text.text = Editable.Factory.getInstance().newEditable(value ?: "")
}
fun getText(): String {
return this.input_edit_text.text.toString()
}
var header: String?
get() = this.header_text_view.text.toString()
set(value) {
this.header_text_view.text = Editable.Factory.getInstance().newEditable(value ?: "")
}
constructor(context: Context) : super(context){
init(context, null)
}
constructor(context: Context, attrs: AttributeSet) : super(context, attrs){
init(context, attrs)
}
constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {
init(context, attrs)
}
private fun init(context: Context, attrs: AttributeSet?) {
inflate(context, R.layout.ui_custom_edit_text, this)
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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"
tools:context=".MainActivity"
android:orientation="vertical">
<com.example.customedittextbug.CustomEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/first_custom_edit_text"/>
<com.example.customedittextbug.CustomEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/second_custom_edit_text"/>
<EditText
tools:hint="input@hint.example"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="-4dp"
android:layout_marginRight="-4dp"
android:textColor="@android:color/black"
android:textSize="18sp"
android:inputType="text"
android:id="@+id/first_simple_edit_text"/>
<com.example.customedittextbug.CustomEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/third_custom_edit_text"/>
<EditText
tools:hint="input@hint.example"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="-4dp"
android:layout_marginRight="-4dp"
android:textColor="@android:color/black"
android:textSize="18sp"
android:inputType="text"
android:id="@+id/second_simple_edit_text"/>
</LinearLayout>
ui_custom_edit_text.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
tools:text="Input header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textStyle="bold"
android:textSize="17sp"
android:id="@+id/header_text_view"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="@+id/validations_errors_holder"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/common_input_holder">
<EditText
tools:hint="input@hint.example"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="-4dp"
android:layout_marginRight="-4dp"
android:textColor="@android:color/black"
android:textSize="18sp"
android:inputType="text"
android:id="@+id/input_edit_text"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignEnd="@+id/input_edit_text"
android:layout_centerVertical="true"
android:layout_marginEnd="4dp"
android:layout_marginStart="4dp"
android:gravity="end"
android:orientation="horizontal"
android:id="@+id/right_view_holder"/>
</RelativeLayout>
</LinearLayout>
更新
我找到了这两个指南，都很好地解释了我的问题回答后如何解决此问题.
UPDATE
I found those two guides with nice explanation how to fix this problem after my question was answered.
推荐答案
状态恢复由ID键控，并且所有自定义视图都有一个具有相同ID的子视图: input_edit_text .因此，它们都恢复到相同的状态，因为它们都得到了保存在该ID下的最后一个.
State restoration is keyed by ID, and all of your custom views have a sub-View with the same ID: input_edit_text. Thus, they all get restored to the same state because they all got the last one that was saved under that ID.
您可以通过在该 EditText 上设置 android:saveEnabled ="false" 来避免这种情况(尽管您可能自己想保存/恢复实例状态)在您的 CustomEditText 中).
You could avoid this by setting android:saveEnabled="false" on that EditText (though you'll probably want to do the save/restore of instance state yourself in your CustomEditText).
这篇关于Android自定义编辑文本值被另一个自定义编辑文本更改的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
