如何编程更改EDITTEXT光标颜色在android系统？ [英] How to Change programatically Edittext Cursor Color in android?

问题描述

下面的Andr​​oid提供的android：textCursorDrawable =@绘制/ black_color_cursor XML中，但我的cunsurn是如何动态地改变改变光标颜色的android

在我的情况我已经设置光标绘制白色的，但我需要改变黑怎么办？

  //设置一个EditText视图来获取用户输入
    最终的EditText输入=新的EditText（nyactivity）;
    input.setTextColor（getResources（）的getColor（R.color.black））;
 

解决方案

使用一些反思的伎俩，我

Java的：

  {尝试
    // https://github.com/android/platform_frameworks_base/blob/kitkat-release/core/java/android/widget/TextView.java#L562-564
    域F = TextView.class.getDeclaredField（mCursorDrawableRes）;
    f.setAccessible（真）;
    f.set（yourEditText，R.drawable.cursor）;
}赶上（例外忽略）{
}
 

XML：

 ＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT;形状的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
    机器人：形状=矩形＆GT;    [固体机器人：颜色=＃FF000000/＆GT;    ＆LT;大小的android：宽=1DP/＆GT;＆LT; /形状＆GT;
 

---

下面是您可以使用，这并不需要一个XML的方法：

 公共静态无效setCursorDrawableColor（EditText上EDITTEXT，诠释颜色）{
    尝试{
        现场fCursorDrawableRes = TextView.class.getDeclaredField（mCursorDrawableRes）;
        fCursorDrawableRes.setAccessible（真）;
        INT mCursorDrawableRes = fCursorDrawableRes.getInt（EDITTEXT）;
        现场fEditor = TextView.class.getDeclaredField（mEditor）;
        fEditor.setAccessible（真）;
        对象编辑器= fEditor.get（EDITTEXT）;
        类＆LT;＆GT; clazz所= editor.getClass（）;
        现场fCursorDrawable = clazz.getDeclaredField（mCursorDrawable）;
        fCursorDrawable.setAccessible（真）;
        可绘制[] =可绘制新绘制对象[2];
        。可绘[0] = editText.getContext（）getResources（）getDrawable（mCursorDrawableRes）;
        。可绘[1] = editText.getContext（）getResources（）getDrawable（mCursorDrawableRes）;
        可绘制[0] .setColorFilter（颜色，PorterDuff.Mode.SRC_IN）;
        可绘[1] .setColorFilter（颜色，PorterDuff.Mode.SRC_IN）;
        fCursorDrawable.set（编辑，图形）;
    }赶上（Throwable的忽略）{
    }
}
 

Here android provide android:textCursorDrawable="@drawable/black_color_cursor" within xml, but my cunsurn is how to change dynamically change cursor color in android

in my case i have set cursor drawable white, but i need to change black How to do ?

    // Set an EditText view to get user input
    final EditText input = new EditText(nyactivity);
    input.setTextColor(getResources().getColor(R.color.black));

解决方案

Using some reflection did the trick for me

Java:

try {
    // https://github.com/android/platform_frameworks_base/blob/kitkat-release/core/java/android/widget/TextView.java#L562-564
    Field f = TextView.class.getDeclaredField("mCursorDrawableRes");
    f.setAccessible(true);
    f.set(yourEditText, R.drawable.cursor);
} catch (Exception ignored) {
}

XML:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <solid android:color="#ff000000" />

    <size android:width="1dp" />

</shape>

---

Here is a method that you can use that doesn't need an XML:

public static void setCursorDrawableColor(EditText editText, int color) {
    try {
        Field fCursorDrawableRes = TextView.class.getDeclaredField("mCursorDrawableRes");
        fCursorDrawableRes.setAccessible(true);
        int mCursorDrawableRes = fCursorDrawableRes.getInt(editText);
        Field fEditor = TextView.class.getDeclaredField("mEditor");
        fEditor.setAccessible(true);
        Object editor = fEditor.get(editText);
        Class<?> clazz = editor.getClass();
        Field fCursorDrawable = clazz.getDeclaredField("mCursorDrawable");
        fCursorDrawable.setAccessible(true);
        Drawable[] drawables = new Drawable[2];
        drawables[0] = editText.getContext().getResources().getDrawable(mCursorDrawableRes);
        drawables[1] = editText.getContext().getResources().getDrawable(mCursorDrawableRes);
        drawables[0].setColorFilter(color, PorterDuff.Mode.SRC_IN);
        drawables[1].setColorFilter(color, PorterDuff.Mode.SRC_IN);
        fCursorDrawable.set(editor, drawables);
    } catch (Throwable ignored) {
    }
}

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