是有可能的下划线的颜色从一个动态变化的EditText？ 类似的效果，当我关注它，然后它变成蓝色。
希望你明白我想做的事情。
Answer 1:
Create your own customized EditText control
Here's an example that i made just for you:
When selected, you juste have to change mPaint.setColor(Color.GREEN); to another color
public class CustomEditText extends EditText{
private Rect mRect;
private Paint mPaint;
int widthMsSize;
int heightMsSize ;
// we need this constructor for LayoutInflater
public CustomEditText(Context context, AttributeSet attrs) {
super(context, attrs);
mPaint = new Paint();
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(5);
mPaint.setColor(Color.GREEN);
System.out.println("constructor");
}
protected void onMeasure(final int widthMeasureSpec,
final int heightMeasureSpec) {
// Extract the Ms (MesaureSpec) parameters
widthMsSize = MeasureSpec.getSize(widthMeasureSpec);
heightMsSize = MeasureSpec.getSize(heightMeasureSpec);
System.out.println("on measure");
// Satisfy contract by calling setMeasuredDimension
setMeasuredDimension(widthMsSize,
heightMsSize);
}
protected void onDraw(Canvas canvas) {
canvas.drawLine(5, heightMsSize-10, widthMsSize-5, heightMsSize-10, mPaint); //draw underline
canvas.drawLine(8, heightMsSize-10,8, heightMsSize-20, mPaint); //draw left corner
canvas.drawLine(widthMsSize-8, heightMsSize-10,widthMsSize-8, heightMsSize-20, mPaint); //draw right corner
super.onDraw(canvas);
}
}
main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<com.example.testanimationfadeinfadeout.CustomEditText
android:id="@+id/textedit"
android:layout_width="228dp"
android:layout_height="41dp"
android:ems="10"
android:hint="color is changed" />
</LinearLayout>
Answer 2:
public static void setEditTextUnderlineColor(final EditText editText, final int focusedColor, final int unfocusedColor) {
editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (hasFocus) {
editText.getBackground().setColorFilter(focusedColor, PorterDuff.Mode.SRC_ATOP);
return;
}
editText.getBackground().setColorFilter(unfocusedColor, PorterDuff.Mode.SRC_ATOP);
}
});
editText.getBackground().setColorFilter(unfocusedColor, PorterDuff.Mode.SRC_ATOP);
Answer 3:
要自定义编辑文本我做了以下的方法。 它的工作对我来说很简单的方式。
public class CardNumberText extends EditText {
boolean isFocus;
Paint mPaint;
Rect mRect;
int widthSize, heightSize;
public CardNumberText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initStyle();
}
private void initStyle() {
mRect = new Rect();
mPaint = new Paint();
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setColor(Color.parseColor("#B3B3B3"));
}
public CardNumberText(Context context, AttributeSet attrs) {
super(context, attrs);
initStyle();
}
public CardNumberText(Context context) {
super(context);
initStyle();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Rect rect = mRect;
Paint paint = mPaint;
if (isFocus) {
mPaint.setStrokeWidth(3.0f);
mPaint.setColor(Color.parseColor("#80CBC4"));
} else {
mPaint.setStrokeWidth(1.5f);
mPaint.setColor(Color.parseColor("#B3B3B3"));
}
for (int i = 0; i < getLineCount(); i++) {
int baseline = getLineBounds(i, rect);
canvas.drawLine(rect.left, baseline + 20, rect.right, baseline,
paint);
}
}
@Override
protected void onFocusChanged(boolean focused, int direction,
Rect previouslyFocusedRect) {
super.onFocusChanged(focused, direction, previouslyFocusedRect);
if (focused) {
isFocus = true;
} else {
isFocus = false;
}
}
}
文章来源: Android, change underline Color from an EditText dynamically
