我使用appcompat v7，以获得在Android 5和更少的外观一致。它运行得相当好。但是，我不知道如何更改EditTexts的底线颜色和强调色。这可能吗?
我试图定义一个自定义android:editTextStyle(参见下面)，但我只成功地改变了完整的背景色或文本颜色，但不是底线或强调色。是否有要使用的特定属性值?我必须通过android:background属性使用自定义可绘制图像吗?在六边形中不能指定颜色吗?
<style name="Theme.App.Base" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="android:editTextStyle">@style/Widget.App.EditText</item>
</style>
<style name="Widget.App.EditText" parent="Widget.AppCompat.EditText">
???
</style>
根据android API 21的来源，材料设计的EditTexts似乎使用colorControlActivated和colorControlNormal。因此，我尝试在前面的样式定义中覆盖这些属性，但没有效果。可能appcompat不使用它。不幸的是，我找不到最新版本的appcompat材料设计的来源。
经过2天的斗争，我想出了一个解决这个问题的工作方案，下面的解决方案是完美的，他们想要改变少数编辑文本，通过java代码改变/切换颜色，并希望克服操作系统版本上由于使用setColorFilter()方法而导致的不同行为的问题。
import android.content.Context;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.AppCompatDrawableManager;
import android.support.v7.widget.AppCompatEditText;
import android.util.AttributeSet;
import com.newco.cooltv.R;
public class RqubeErrorEditText extends AppCompatEditText {
private int errorUnderlineColor;
private boolean isErrorStateEnabled;
private boolean mHasReconstructedEditTextBackground;
public RqubeErrorEditText(Context context) {
super(context);
initColors();
}
public RqubeErrorEditText(Context context, AttributeSet attrs) {
super(context, attrs);
initColors();
}
public RqubeErrorEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initColors();
}
private void initColors() {
errorUnderlineColor = R.color.et_error_color_rule;
}
public void setErrorColor() {
ensureBackgroundDrawableStateWorkaround();
getBackground().setColorFilter(AppCompatDrawableManager.getPorterDuffColorFilter(
ContextCompat.getColor(getContext(), errorUnderlineColor), PorterDuff.Mode.SRC_IN));
}
private void ensureBackgroundDrawableStateWorkaround() {
final Drawable bg = getBackground();
if (bg == null) {
return;
}
if (!mHasReconstructedEditTextBackground) {
// This is gross. There is an issue in the platform which affects container Drawables
// where the first drawable retrieved from resources will propogate any changes
// (like color filter) to all instances from the cache. We'll try to workaround it...
final Drawable newBg = bg.getConstantState().newDrawable();
//if (bg instanceof DrawableContainer) {
// // If we have a Drawable container, we can try and set it's constant state via
// // reflection from the new Drawable
// mHasReconstructedEditTextBackground =
// DrawableUtils.setContainerConstantState(
// (DrawableContainer) bg, newBg.getConstantState());
//}
if (!mHasReconstructedEditTextBackground) {
// If we reach here then we just need to set a brand new instance of the Drawable
// as the background. This has the unfortunate side-effect of wiping out any
// user set padding, but I'd hope that use of custom padding on an EditText
// is limited.
setBackgroundDrawable(newBg);
mHasReconstructedEditTextBackground = true;
}
}
}
public boolean isErrorStateEnabled() {
return isErrorStateEnabled;
}
public void setErrorState(boolean isErrorStateEnabled) {
this.isErrorStateEnabled = isErrorStateEnabled;
if (isErrorStateEnabled) {
setErrorColor();
invalidate();
} else {
getBackground().mutate().clearColorFilter();
invalidate();
}
}
}
xml中的用法
<com.rqube.ui.widget.RqubeErrorEditText
android:id="@+id/f_signup_et_referral_code"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toEndOf="@+id/referral_iv"
android:layout_toRightOf="@+id/referral_iv"
android:ems="10"
android:hint="@string/lbl_referral_code"
android:imeOptions="actionNext"
android:inputType="textEmailAddress"
android:textSize="@dimen/text_size_sp_16"
android:theme="@style/EditTextStyle"/>
按样式添加线条
<style name="EditTextStyle" parent="android:Widget.EditText">
<item name="android:textColor">@color/txt_color_change</item>
<item name="android:textColorHint">@color/et_default_color_text</item>
<item name="colorControlNormal">@color/et_default_color_rule</item>
<item name="colorControlActivated">@color/et_engagged_color_rule</item>
</style>
切换颜色的Java代码
myRqubeEditText.setErrorState(true);
myRqubeEditText.setErrorState(false);
经过2天的斗争，我想出了一个解决这个问题的工作方案，下面的解决方案是完美的，他们想要改变少数编辑文本，通过java代码改变/切换颜色，并希望克服操作系统版本上由于使用setColorFilter()方法而导致的不同行为的问题。
import android.content.Context;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.AppCompatDrawableManager;
import android.support.v7.widget.AppCompatEditText;
import android.util.AttributeSet;
import com.newco.cooltv.R;
public class RqubeErrorEditText extends AppCompatEditText {
private int errorUnderlineColor;
private boolean isErrorStateEnabled;
private boolean mHasReconstructedEditTextBackground;
public RqubeErrorEditText(Context context) {
super(context);
initColors();
}
public RqubeErrorEditText(Context context, AttributeSet attrs) {
super(context, attrs);
initColors();
}
public RqubeErrorEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initColors();
}
private void initColors() {
errorUnderlineColor = R.color.et_error_color_rule;
}
public void setErrorColor() {
ensureBackgroundDrawableStateWorkaround();
getBackground().setColorFilter(AppCompatDrawableManager.getPorterDuffColorFilter(
ContextCompat.getColor(getContext(), errorUnderlineColor), PorterDuff.Mode.SRC_IN));
}
private void ensureBackgroundDrawableStateWorkaround() {
final Drawable bg = getBackground();
if (bg == null) {
return;
}
if (!mHasReconstructedEditTextBackground) {
// This is gross. There is an issue in the platform which affects container Drawables
// where the first drawable retrieved from resources will propogate any changes
// (like color filter) to all instances from the cache. We'll try to workaround it...
final Drawable newBg = bg.getConstantState().newDrawable();
//if (bg instanceof DrawableContainer) {
// // If we have a Drawable container, we can try and set it's constant state via
// // reflection from the new Drawable
// mHasReconstructedEditTextBackground =
// DrawableUtils.setContainerConstantState(
// (DrawableContainer) bg, newBg.getConstantState());
//}
if (!mHasReconstructedEditTextBackground) {
// If we reach here then we just need to set a brand new instance of the Drawable
// as the background. This has the unfortunate side-effect of wiping out any
// user set padding, but I'd hope that use of custom padding on an EditText
// is limited.
setBackgroundDrawable(newBg);
mHasReconstructedEditTextBackground = true;
}
}
}
public boolean isErrorStateEnabled() {
return isErrorStateEnabled;
}
public void setErrorState(boolean isErrorStateEnabled) {
this.isErrorStateEnabled = isErrorStateEnabled;
if (isErrorStateEnabled) {
setErrorColor();
invalidate();
} else {
getBackground().mutate().clearColorFilter();
invalidate();
}
}
}
xml中的用法
<com.rqube.ui.widget.RqubeErrorEditText
android:id="@+id/f_signup_et_referral_code"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toEndOf="@+id/referral_iv"
android:layout_toRightOf="@+id/referral_iv"
android:ems="10"
android:hint="@string/lbl_referral_code"
android:imeOptions="actionNext"
android:inputType="textEmailAddress"
android:textSize="@dimen/text_size_sp_16"
android:theme="@style/EditTextStyle"/>
按样式添加线条
<style name="EditTextStyle" parent="android:Widget.EditText">
<item name="android:textColor">@color/txt_color_change</item>
<item name="android:textColorHint">@color/et_default_color_text</item>
<item name="colorControlNormal">@color/et_default_color_rule</item>
<item name="colorControlActivated">@color/et_engagged_color_rule</item>
</style>
切换颜色的Java代码
myRqubeEditText.setErrorState(true);
myRqubeEditText.setErrorState(false);
