android – 如何在EditText上以编程方式更改气泡(光标下)的颜色?
作者:互联网
我有EditText,并希望在代码上更改PROGRAMMATICALLY颜色.
要更改光标的颜色,请使用this code.
但是如何在代码上的EditView PROGRAMMATICALLY上更改圆圈的颜色?
解决方法:
您将需要使用反射来对选择手柄(气泡)进行着色.我今天早上写了下面的课:
用法示例:
try {
EditTextTint.applyColor(editText, Color.CYAN);
} catch (EditTextTint.EditTextTintError e) {
e.printStackTrace();
}
EditTextTint.java:
import android.content.res.Resources;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.support.annotation.ColorInt;
import android.support.annotation.NonNull;
import android.widget.EditText;
import android.widget.TextView;
import java.lang.reflect.Field;
/**
* Tint the cursor and select handles of an {@link EditText} programmatically.
*/
public class EditTextTint {
/**
* Set the cursor and handle colors for an {@link EditText} programmatically.
*
* @param editText
* The {@link EditText} to tint
* @param color
* The color to apply for the cursor and select handles
* @throws EditTextTintError
* If an error occured while attempting to tint the view.
*/
public static void applyColor(@NonNull EditText editText, @ColorInt int color) throws EditTextTintError {
EditTextTint editTextTint = new Builder(editText)
.setCursorColor(color)
.setSelectHandleLeftColor(color)
.setSelectHandleRightColor(color)
.setSelectHandleMiddleColor(color)
.build();
editTextTint.apply();
}
private final EditText editText;
private final Integer cursorColor;
private final Integer selectHandleLeftColor;
private final Integer selectHandleRightColor;
private final Integer selectHandleMiddleColor;
private EditTextTint(Builder builder) {
editText = builder.editText;
cursorColor = builder.cursorColor;
selectHandleLeftColor = builder.selectHandleLeftColor;
selectHandleRightColor = builder.selectHandleRightColor;
selectHandleMiddleColor = builder.selectHandleMiddleColor;
}
/**
* Sets the color for the cursor and handles on the {@link EditText editText}.
*
* @throws EditTextTintError
* if an error occurs while tinting the view.
*/
public void apply() throws EditTextTintError {
try {
Resources res = editText.getContext().getResources();
// Get the editor
Field field = TextView.class.getDeclaredField("mEditor");
field.setAccessible(true);
Object editor = field.get(editText);
if (cursorColor != null) {
// Get the cursor drawable, tint it, and set it on the TextView Editor
field = TextView.class.getDeclaredField("mCursorDrawableRes");
field.setAccessible(true);
int cursorDrawableRes = field.getInt(editText);
Drawable cursorDrawable = res.getDrawable(cursorDrawableRes).mutate();
cursorDrawable.setColorFilter(cursorColor, PorterDuff.Mode.SRC_IN);
Drawable[] drawables = {cursorDrawable, cursorDrawable};
field = editor.getClass().getDeclaredField("mCursorDrawable");
field.setAccessible(true);
field.set(editor, drawables);
}
String[] resFieldNames = {"mTextSelectHandleLeftRes", "mTextSelectHandleRightRes", "mTextSelectHandleRes"};
String[] drawableFieldNames = {"mSelectHandleLeft", "mSelectHandleRight", "mSelectHandleCenter"};
Integer[] colors = {selectHandleLeftColor, selectHandleRightColor, selectHandleMiddleColor};
for (int i = 0; i < resFieldNames.length; i++) {
Integer color = colors[i];
if (color == null) {
continue;
}
String resFieldName = resFieldNames[i];
String drawableFieldName = drawableFieldNames[i];
field = TextView.class.getDeclaredField(resFieldName);
field.setAccessible(true);
int selectHandleRes = field.getInt(editText);
Drawable selectHandleDrawable = res.getDrawable(selectHandleRes).mutate();
selectHandleDrawable.setColorFilter(color, PorterDuff.Mode.SRC_IN);
field = editor.getClass().getDeclaredField(drawableFieldName);
field.setAccessible(true);
field.set(editor, selectHandleDrawable);
}
} catch (Exception e) {
throw new EditTextTintError("Error applying tint to " + editText, e);
}
}
public static class Builder {
final EditText editText;
Integer cursorColor;
Integer selectHandleLeftColor;
Integer selectHandleRightColor;
Integer selectHandleMiddleColor;
public Builder(@NonNull EditText editText) {
this.editText = editText;
}
public Builder setCursorColor(@ColorInt int cursorColor) {
this.cursorColor = cursorColor;
return this;
}
public Builder setSelectHandleLeftColor(@ColorInt int selectHandleLeftColor) {
this.selectHandleLeftColor = selectHandleLeftColor;
return this;
}
public Builder setSelectHandleRightColor(@ColorInt int selectHandleRightColor) {
this.selectHandleRightColor = selectHandleRightColor;
return this;
}
public Builder setSelectHandleMiddleColor(@ColorInt int selectHandleMiddleColor) {
this.selectHandleMiddleColor = selectHandleMiddleColor;
return this;
}
public EditTextTint build() {
return new EditTextTint(this);
}
}
public static class EditTextTintError extends Exception {
public EditTextTintError(String message, Throwable cause) {
super(message, cause);
}
}
}
注意:这应该从Jelly Bean到Nougat.但是,由于它使用反射来获取和设置私有字段,因此在未来的Android版本中可能会中断,或者如果制造商对EditText进行了更改.
标签:android,styles,colors,cursor,editview 来源: https://codeday.me/bug/20191005/1856500.html