Selector 帮助类，省去xml写选择器，也可以动态设置选择器，新增5.0的波纹效果
- PS：如果遇到需求，需要java代码控制颜色，我的内心几乎是崩溃的。
001.jpg
001.gif
- 怎么用
<pre>
DrawableHelper.Builder.getInstance()
.solidColor("#EEEEEE")
.shape(Shape.RECTANGLE)
.radius(16)
.strokeColor("#DDDDDD")
.strokeWidth(4)
.build()
.bindView(findViewById(R.id.bt_1));
Drawable drawable = DrawableHelper.Builder.getInstance()
.solidColor("#EEEEEE", "#DDDDDD")
.shape(Shape.RECTANGLE)
.radius(16)
.strokeColor("#DDDDDD")
.strokeWidth(4)
.build()
.generateDrawable(this);
View view= findViewById(R.id.bt_2);
view.setBackgroundDrawable(drawable);
view.setClickable(true);
</pre>
- 核心代码
<pre>
package org.alex.helper;
import android.content.Context;
import android.content.res.ColorStateList;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.graphics.drawable.RippleDrawable;
import android.graphics.drawable.StateListDrawable;
import android.os.Build;
import android.view.View;
import org.alex.helper.drawable.Shape;
/**
* 作者：Alex
* 时间：2017/1/6 16:11
* 简述：
*/
@SuppressWarnings("all")
public class DrawableHelper {
private StateListDrawable stateListDrawable;
private GradientDrawable normalGradientDrawable;
private GradientDrawable selectedGradientDrawable;
private Builder builder;
private DrawableHelper(Builder builder) {
this.builder = builder;
initDrawable();
}
private void initDrawable() {
normalGradientDrawable = new GradientDrawable();
selectedGradientDrawable = new GradientDrawable();
stateListDrawable = new StateListDrawable();
normalGradientDrawable.setShape(builder.normalShape);
normalGradientDrawable.setColor(builder.normalSolidColor);
selectedGradientDrawable.setShape(builder.selectedShape);
selectedGradientDrawable.setColor(builder.selectedSolidColor);
}
public void bindView(View view) {
bindView(view, true);
}
public void bindView(View view, boolean clickable) {
Drawable drawable = generateDrawable(view.getContext());
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
view.setBackground(drawable);
} else {
view.setBackgroundDrawable(drawable);
}
view.setClickable(clickable);
}
public Drawable generateBitmapDrawable(Context context, int... resId) {
if (resId == null || resId.length <= 0) {
return stateListDrawable;
}
int normalResId = 0, selectedResId = 0;
if (resId.length == 1) {
normalResId = resId[0];
selectedResId = resId[0];
} else if (resId.length == 1) {
selectedResId = resId[1];
}
BitmapDrawable drawableSelected = new BitmapDrawable(context.getResources(), BitmapFactory.decodeResource(context.getResources(), selectedResId));
stateListDrawable.addState(new int[]{android.R.attr.state_pressed}, drawableSelected);
stateListDrawable.addState(new int[]{android.R.attr.state_selected}, drawableSelected);
stateListDrawable.addState(new int[]{android.R.attr.state_checkable}, drawableSelected);
BitmapDrawable normalDrawable = new BitmapDrawable(context.getResources(), BitmapFactory.decodeResource(context.getResources(), normalResId));
stateListDrawable.addState(new int[]{}, normalDrawable);
return stateListDrawable;
}
public Drawable generateDrawable(Context context) {
cornerRadii(context, normalGradientDrawable, builder.normalTopLeftRadius, builder.normalTopRightRadius, builder.normalBottomLeftRadius, builder.normalBottomRightRadius);
cornerRadii(context, selectedGradientDrawable, builder.selectedTopLeftRadius, builder.selectedTopRightRadius, builder.selectedBottomLeftRadius, builder.selectedBottomRightRadius);
normalGradientDrawable.setStroke((int) dp2px(context, builder.normalStrokeWidth), builder.normalStrokeColor);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
/\*关于 mask drawable 如果 该处 颜色 不是 全透明； 按压的水波形状 就一定是矩形；所以此处的颜色一定要是 00 00 00 00\*/
selectedGradientDrawable.setStroke((int) dp2px(context, builder.selectedStrokeWidth), Color.parseColor("#00000000"));
RippleDrawable rippleDrawable = new RippleDrawable(ColorStateList.valueOf(builder.selectedSolidColor), normalGradientDrawable, selectedGradientDrawable);
return rippleDrawable;
}
stateListDrawable.addState(new int[]{android.R.attr.state_pressed}, selectedGradientDrawable);
stateListDrawable.addState(new int[]{android.R.attr.state_selected}, selectedGradientDrawable);
stateListDrawable.addState(new int[]{android.R.attr.state_checkable}, selectedGradientDrawable);
stateListDrawable.addState(new int[]{}, normalGradientDrawable);
return stateListDrawable;
}
/\*\*
\* 圆角化 单位 dp
\*
\* @param topLeftRadius 左上角的 半径
\* @param topRightRadius 右上角的 半径
\* @param bottomLeftRadius 左下角的 半径
\* @param bottomRightRadius 右下角的 半径
\*/
private void cornerRadii(Context context, GradientDrawable gradientDrawable, float topLeftRadius, float topRightRadius, float bottomRightRadius, float bottomLeftRadius) {
topLeftRadius = dp2px(context, topLeftRadius);
topRightRadius = dp2px(context, topRightRadius);
bottomLeftRadius = dp2px(context, bottomLeftRadius);
bottomRightRadius = dp2px(context, bottomRightRadius);
gradientDrawable.setCornerRadii(new float[]{topLeftRadius, topLeftRadius, topRightRadius, topRightRadius, bottomRightRadius, bottomRightRadius, bottomLeftRadius, bottomLeftRadius});
}
/\*\*
\* 数据转换: dp---->px
\*/
private float dp2px(Context context, float dp) {
if (context == null) {
return -1;
}
return dp \* context.getResources().getDisplayMetrics().density;
}
public static class Builder {
private static float noDefaultSize = -1;
private static Builder instance;
@Shape
private int normalShape = Shape.RECTANGLE;
@Shape
private int selectedShape = Shape.RECTANGLE;
private int normalSolidColor;
private int selectedSolidColor;
private float normalRadius = noDefaultSize;
private float normalBottomRightRadius = noDefaultSize;
private float normalBottomLeftRadius = noDefaultSize;
private float normalTopLeftRadius = noDefaultSize;
private float normalTopRightRadius = noDefaultSize;
private float selectedRadius = noDefaultSize;
private float selectedBottomRightRadius = noDefaultSize;
private float selectedBottomLeftRadius = noDefaultSize;
private float selectedTopLeftRadius = noDefaultSize;
private float selectedTopRightRadius = noDefaultSize;
private int normalStrokeColor;
private float normalStrokeWidth = noDefaultSize;
private int selectedStrokeColor;
private float selectedStrokeWidth = noDefaultSize;
private Builder() {
}
public static Builder getInstance() {
instance = new Builder();
return instance;
}
public Builder shape(@Shape int... shape) {
if (shape == null || shape.length <= 0) {
return this;
}
normalShape = shape[0];
selectedShape = shape[shape.length == 1 ? 0 : 1];
return this;
}
public Builder solidColor(int... color) {
if (color == null || color.length <= 0) {
return this;
}
normalSolidColor = color[0];
selectedSolidColor = color[color.length == 1 ? 0 : 1];
return this;
}
public Builder solidColor(String... color) {
if (color == null || color.length <= 0) {
return this;
}
int array[] = new int[color.length];
for (int i = 0; i < color.length; i++) {
array[i] = Color.parseColor(color[i]);
}
solidColor(array);
return this;
}
public Builder strokeColor(int... color) {
if (color == null || color.length <= 0) {
return this;
}
normalStrokeColor = color[0];
selectedStrokeColor = color[color.length == 1 ? 0 : 1];
return this;
}
public Builder strokeColor(String... color) {
if (color == null || color.length <= 0) {
return this;
}
int array[] = new int[color.length];
for (int i = 0; i < color.length; i++) {
array[i] = Color.parseColor(color[i]);
}
strokeColor(array);
return this;
}
public Builder strokeWidth(float... width) {
if (width == null || width.length <= 0) {
return this;
}
normalStrokeWidth = width[0];
selectedStrokeWidth = width[width.length == 1 ? 0 : 1];
return this;
}
public Builder bottomLeftRadius(float... radius) {
if (radius == null || radius.length <= 0) {
return this;
}
normalBottomLeftRadius = radius[0];
selectedBottomLeftRadius = radius[radius.length == 1 ? 0 : 1];
return this;
}
public Builder bottomRightRadius(float... radius) {
if (radius == null || radius.length <= 0) {
return this;
}
normalBottomRightRadius = radius[0];
selectedBottomRightRadius = radius[radius.length == 1 ? 0 : 1];
return this;
}
public Builder topLeftRadius(float... radius) {
if (radius == null || radius.length <= 0) {
return this;
}
normalTopLeftRadius = radius[0];
selectedTopLeftRadius = radius[radius.length == 1 ? 0 : 1];
return this;
}
public Builder topRightRadius(float... radius) {
if (radius == null || radius.length <= 0) {
return this;
}
normalTopRightRadius = radius[0];
selectedTopRightRadius = radius[radius.length == 1 ? 0 : 1];
return this;
}
public Builder radius(float... radius) {
if (radius == null || radius.length <= 0) {
return this;
}
normalRadius = radius[0];
selectedRadius = radius[radius.length == 1 ? 0 : 1];
return this;
}
public DrawableHelper build() {
if (normalRadius > 0) {
normalBottomLeftRadius = normalRadius;
normalBottomRightRadius = normalRadius;
normalTopLeftRadius = normalRadius;
normalTopRightRadius = normalRadius;
}
if (selectedRadius > 0) {
selectedBottomLeftRadius = selectedRadius;
selectedBottomRightRadius = selectedRadius;
selectedTopLeftRadius = selectedRadius;
selectedTopRightRadius = selectedRadius;
}
return new DrawableHelper(this);
}
}
}
</pre>
