代码 实现按钮 seletor shape 选择器等

package com.fangwf.shapeviewcode.util;import android.content.Context;import android.graphics.Color;import android.graphics.drawable.Drawable;import android.graphics.drawable.GradientDrawable;import android.graphics.drawable.StateListDrawable;import android.os.Build;import android.support.v4.content.ContextCompat;import android.view.View;import com.fangwf.shapeviewcode.widget.OvalDrawable;public class ShapeBackgroundUtil {    /**     * 设置自定义颜色的drawable背景     *     * @param context     * @param view     * @param drawableId drawable-shape-背景     * @param color      自定颜色     */    public static void setCustomColorShape(Context context, View view, int drawableId, String color) {        setCustomColorShape(context, view, drawableId, Color.parseColor(color));    }    public static void setCustomColorShape(Context context, View view, int drawableId, int color) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {            view.setBackground(ContextCompat.getDrawable(context, drawableId));        } else {            view.setBackgroundDrawable(ContextCompat.getDrawable(context, drawableId));        }        GradientDrawable myGrad = (GradientDrawable) view.getBackground();        myGrad.setColor(color);    }    /**     * 设置自定义颜色的全圆角长形按钮背景     *     * @param view     * @param color     */    public static void setCustomColorOvalBackground(View view, String color) {        setCustomColorOvalBackground(view, Color.parseColor(color));    }    public static void setCustomColorOvalBackground(View view, int color) {        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {            view.setBackground(new OvalDrawable(color));        } else {            view.setBackgroundDrawable(new OvalDrawable(color));        }    }    public static void setMultiColorOvalBackground(View view, String defaultColor, String activeColor) {        setMultiColorOvalBackground(view, Color.parseColor(defaultColor), Color.parseColor(activeColor));    }    public static void setMultiColorOvalBackground(View view, int defaultColor, int activeColor) {        StateListDrawable drawable = new StateListDrawable();        Drawable drawable1 = new OvalDrawable(defaultColor);        Drawable drawable2 = new OvalDrawable(activeColor);        drawable.addState(new int[]{-android.R.attr.state_enabled}, drawable2);        drawable.addState(new int[]{android.R.attr.state_selected}, drawable2);        drawable.addState(new int[]{android.R.attr.state_active}, drawable2);        drawable.addState(new int[]{android.R.attr.state_checked}, drawable2);        drawable.addState(new int[]{android.R.attr.state_pressed}, drawable2);        drawable.addState(new int[]{android.R.attr.state_focused}, drawable2);        drawable.addState(new int[]{}, drawable1);        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {            view.setBackground(drawable);        } else {            view.setBackgroundDrawable(drawable);        }    }    public static void setMultiColorBackground(Context context, View view, int drawableId, String defaultColor, String activeColor) {        setMultiColorBackground(context, view, drawableId, Color.parseColor(defaultColor), Color.parseColor(activeColor));    }    public static void setMultiColorBackground(Context context, View view, int drawableId, int defaultColor, int activeColor) {        StateListDrawable drawable = new StateListDrawable();        GradientDrawable drawable1 = (GradientDrawable) ContextCompat.getDrawable(context, drawableId);        GradientDrawable drawable2 = (GradientDrawable) ContextCompat.getDrawable(context, drawableId);        drawable1.setColor(defaultColor);        drawable2.setColor(activeColor);//        drawable.addState(new int[]{android.R.attr.state_enabled}, drawable2);        drawable.addState(new int[]{android.R.attr.state_active}, drawable2);        drawable.addState(new int[]{android.R.attr.state_checked}, drawable2);        drawable.addState(new int[]{android.R.attr.state_pressed}, drawable2);        drawable.addState(new int[]{android.R.attr.state_selected}, drawable2);        drawable.addState(new int[]{android.R.attr.state_focused}, drawable2);        drawable.addState(new int[]{}, drawable1);        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {            view.setBackground(drawable);        } else {            view.setBackgroundDrawable(drawable);        }    }}

package com.fangwf.shapeviewcode.activity;import android.app.Activity;import android.os.Bundle;import android.view.View;import com.fangwf.shapeviewcode.R;import com.fangwf.shapeviewcode.util.ShapeBackgroundUtil;public class MainActivity extends Activity implements View.OnClickListener {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ShapeBackgroundUtil.setMultiColorBackground(this, findViewById(R.id.button), R.drawable.shape_radius, "#e26119", "#df3816");        ShapeBackgroundUtil.setMultiColorOvalBackground(findViewById(R.id.button2), "#ea517d", "#df3816");        ShapeBackgroundUtil.setCustomColorOvalBackground(findViewById(R.id.button3), "#0d3fb3");        ShapeBackgroundUtil.setCustomColorShape(this,findViewById(R.id.button4),R.drawable.shape_radius,"#e26119");        findViewById(R.id.button).setOnClickListener(this);        findViewById(R.id.button2).setOnClickListener(this);    }    @Override    public void onClick(View v) {    }}

R.drawable.shape_radius

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" >    <corners        android:topLeftRadius="5dp"        android:topRightRadius="5dp"        android:bottomLeftRadius="5dp"        android:bottomRightRadius="5dp"/>    <solid        android:color="#00000000"/></shape>  

package com.fangwf.shapeviewcode.widget;import android.graphics.Canvas;import android.graphics.ColorFilter;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.RectF;import android.graphics.drawable.Drawable;public class OvalDrawable extends Drawable {    public OvalDrawable() {        this(0);    }    public OvalDrawable(int color) {        mPaint.setColor(color);        mPaint.setStyle(Paint.Style.FILL);        mPaint.setAntiAlias(true);    }    private boolean mRebuildShader = true;    private final Paint mPaint = new Paint();    private RectF leftRect, rightRect, cententRect;    @Override    public void draw(Canvas canvas) {        if (mRebuildShader) {            Rect bounds = getBounds();            int r = bounds.bottom - bounds.top;            leftRect = new RectF(bounds.left, bounds.top, bounds.left + r, bounds.top + r);            rightRect = new RectF(bounds.right - r, bounds.top, bounds.right, bounds.top + r);            cententRect = new RectF(bounds.left + r / 2, bounds.top, bounds.right - r / 2, bounds.bottom);        }        canvas.drawArc(leftRect, 90, 180, true, mPaint);        canvas.drawRect(cententRect, mPaint);        canvas.drawArc(rightRect, -90, 180, true, mPaint);    }    @Override    protected void onBoundsChange(Rect bounds) {        super.onBoundsChange(bounds);        mRebuildShader = true;    }    public void setColor(int color) {        mPaint.setColor(color);    }    public int getColor() {        return mPaint.getColor();    }    @Override    public void setAlpha(int alpha) {        mPaint.setAlpha(alpha);    }    @Override    public int getAlpha() {        return mPaint.getAlpha();    }    @Override    public void setColorFilter(ColorFilter cf) {    }    @Override    public int getOpacity() {        return 0;    }}