以编程方式设置 textCursorDrawable-移动开发问题

set textCursorDrawable programmatically(以编程方式设置 textCursorDrawable)

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问题描述

如果我在 XML 中添加 EditText 我可以设置 textCursorDrawable="@null":

现在我用 Java 绘制一个 EditText.我想设置 android:textCursorDrawable="@null".

LinearLayout.LayoutParams paramtext = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,线性布局.LayoutParams.WRAP_CONTENT);EditText txtOther = new EditText(this);txtOther.setLayoutParams(paramtext);txtOther.setBackgroundColor(Color.WHITE);txtOther.setTextColor(Color.BLACK);txtOther.setId(99999);//txtOther.setCursorDrawable ?

如何设置?

解决方案

2019 年更新:没有设置可绘制光标的公共 API. 参见 https://stackoverflow.com/a/57555148/253468 适用于 29 及更高版本的 API，在此之前，您需要有条件地使用反射，如下所述.p>

在 API 29 之前，您可以使用反射以编程方式设置它.mCursorDrawableRes 字段没有更改，因此这应该适用于所有设备，除非制造商更改了某些内容或稍后更改.

`使用反射设置光标:`

EditText yourEditText = new EditText(context);...尝试 {//https://github.com/android/platform_frameworks_base/blob/kitkat-release/core/java/android/widget/TextView.java#L562-564字段 f = TextView.class.getDeclaredField(mCursorDrawableRes");f.setAccessible(true);f.set(yourEditText, R.drawable.cursor);} 捕捉(忽略异常){}

在你的应用中定义一个可绘制的光标:

`另一种方法:`

您也可以通过以下方法设置光标颜色:

public static void setCursorDrawableColor(EditText editText, int color) {尝试 {字段 fCursorDrawableRes = TextView.class.getDeclaredField("mCursorDrawableRes");fCursorDrawableRes.setAccessible(true);int mCursorDrawableRes = fCursorDrawableRes.getInt(editText);字段 fEditor = TextView.class.getDeclaredField("mEditor");fEditor.setAccessible(true);对象编辑器 = fEditor.get(editText);类<?>clazz = editor.getClass();字段 fCursorDrawable = clazz.getDeclaredField("mCursorDrawable");fCursorDrawable.setAccessible(true);可绘制 [] 可绘制 = 新的可绘制 [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(编辑器，drawables)；} catch (Throwable 被忽略) {}}

If I add an EditText in XML I can set textCursorDrawable="@null":

<EditText
    android:id="@+id/txtE3Casecode4"
    android:layout_width="30dp"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:background="#C7C7C5"
    android:textCursorDrawable="@null"
    android:ems="10"
    android:inputType="number"
    android:maxLength="2"
    android:text="01"
    android:textColor="#000000" />

Now I draw an EditText in Java. I want set android:textCursorDrawable="@null".

LinearLayout.LayoutParams paramtext = new LinearLayout.LayoutParams(
    LinearLayout.LayoutParams.FILL_PARENT,
    LinearLayout.LayoutParams.WRAP_CONTENT);
EditText txtOther = new EditText(this);
txtOther.setLayoutParams(paramtext);
txtOther.setBackgroundColor(Color.WHITE);
txtOther.setTextColor(Color.BLACK);
txtOther.setId(99999);
// txtOther.setCursorDrawable ?

How do set it?

解决方案

Update 2019: There is no public API to set the cursor drawable. See https://stackoverflow.com/a/57555148/253468 for API available on 29 and above, before that conditionally you'll need to use reflection as described below.


Before API 29 you can set it programmatically by using reflection. The field mCursorDrawableRes hasn't changed so this should work on all devices, unless a manufacturer changed something or it is later changed.
Use reflection to set the cursor:
EditText yourEditText = new EditText(context);

...

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) {
}
Define a cursor drawable in your app:
<?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>


Another approach:
You can also set the cursor color with the following method:
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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