适用于xamarin android的ClearableEdittext [英] ClearableEdittext for xamarin android
问题描述
我已经访问了此链接以及堆栈上的许多其他链接,但无法为xamarin android找到类似的解决方案: https://stackoverflow.com/a/14470930/7462031
I have visited this link and many other links on the stack but I'm unable to find a similar solution for xamarin android : https://stackoverflow.com/a/14470930/7462031
我已经实现了框架布局解决方案,但是我希望在整个应用程序中都使用此解决方案,因此Clearable Edittext看起来很有趣,但是droid部件库不适用于xamarin,所以我想知道是否有人对此问题有解决方案,如果您这样做请帮忙!!
I have implemented the frame layout solution but I want this solution throughout my application So the Clearable Edittext Looked interesting but the droid parts library is not available for xamarin so I am wondering if anyone has a solution for this problem in case you do kindly Help.!
推荐答案
我通过执行以下操作实现了它,但这可能不是最佳解决方案,但我想它是Xamarin.Android可用的唯一解决方案:
I achieved it by doing the following it might not be the best solution but I guess it is the only solution for Xamarin.Android available for this:
public class ClearableEditext : EditText
{
Context mContext;
Drawable imgX;
public ClearableEditext(Context context) : base(context)
{
init(context, null);
}
public ClearableEditext(Context context, Android.Util.IAttributeSet attrs) : base(context, attrs)
{
init(context, attrs);
}
public ClearableEditext(Context context, Android.Util.IAttributeSet attrs, int defStyleAttr) : base(context, attrs, defStyleAttr)
{
init(context, attrs);
}
public ClearableEditext(Context context, Android.Util.IAttributeSet attrs, int defStyleAttr, int defStyleRes) : base(context, attrs, defStyleAttr, defStyleRes)
{
init(context, attrs);
}
public void init(Context ctx, Android.Util.IAttributeSet attrs)
{
mContext = ctx;
imgX = ContextCompat.GetDrawable(ctx, Android.Resource.Drawable.PresenceOffline);
imgX.SetBounds(0, 0, imgX.IntrinsicWidth, imgX.IntrinsicHeight);
manageClearButton();
this.SetOnTouchListener(new TouchHelper(this, imgX));
this.AddTextChangedListener(new TextListener(this));
}
public void manageClearButton()
{
if (this.Text.ToString().Equals(""))
removeClearButton();
else
addClearButton();
}
public void addClearButton()
{
this.SetCompoundDrawables(this.GetCompoundDrawables()[0],
this.GetCompoundDrawables()[1],
imgX,
this.GetCompoundDrawables()[3]);
}
public void removeClearButton()
{
this.SetCompoundDrawables(this.GetCompoundDrawables()[0],
this.GetCompoundDrawables()[1],
null,
this.GetCompoundDrawables()[3]);
}
}
public class TouchHelper : Java.Lang.Object, View.IOnTouchListener
{
ClearableEditext Editext;
public ClearableEditext objClearable { get; set; }
Drawable imgX;
public TouchHelper(ClearableEditext editext, Drawable imgx)
{
Editext = editext;
objClearable = objClearable;
imgX = imgx;
}
public bool OnTouch(View v, MotionEvent e)
{
ClearableEditext et = Editext;
if (et.GetCompoundDrawables()[2] == null)
return false;
// Only do this for up touches
if (e.Action != MotionEventActions.Up)
return false;
// Is touch on our clear button?
if (e.GetX() > et.Width - et.PaddingRight - imgX.IntrinsicWidth)
{
Editext.Text = string.Empty;
if (objClearable != null)
objClearable.removeClearButton();
}
return false;
}
}
public class TextListener : Java.Lang.Object, ITextWatcher
{
public ClearableEditext objClearable { get; set; }
public TextListener(ClearableEditext objRef)
{
objClearable = objRef;
}
public void AfterTextChanged(IEditable s)
{
}
public void BeforeTextChanged(ICharSequence s, int start, int count, int after)
{
}
public void OnTextChanged(ICharSequence s, int start, int before, int count)
{
if (objClearable != null)
objClearable.manageClearButton();
}
}
要将x图标更改为自定义图标,请更改init()中的图像
To change the x icon as your custom one change the image in init()
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