自定义控件（3）---LightingColorFilter光照颜色过滤器--Selector的效果

 源码就是博客里的这些文件，没有上传代码，就差一个图片而已，效果类似图片的selector切换

LightingColorFilter顾名思义光照颜色过滤LightingColorFilter (int mul, int add)

mul全称是colorMultiply意为色彩倍增，而add全称是colorAdd意为色彩添加，这两个值都是16进制的色彩值0xAARRGGBB

LightingColorFilter(0xFFFFFFFF, 0x00000000)的时候原图是不会有任何改变的，如果我们想增加红色的值，那么LightingColorFilter(0xFFFFFFFF, 0x00XX0000)就好，其中XX取值为00至FF

0xFFFFFF00  0x表示16进制数，前两个ff表示的是透明度，00-ff，接下来两个ff表示红R，00-ff，后面两个ff表示绿G，00-ff，最后两个ff表示蓝B，00-ff

黑色0x00000000
白色0x00ffffff

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="#FFFFFF"    android:orientation="vertical" >    <com.aigestudio.customviewdemo.views.CustomView        android:id="@+id/main_cv"        android:layout_width="match_parent"        android:layout_height="match_parent" /></LinearLayout>

MeasureUtil

package com.aigestudio.customviewdemo.views;import android.app.Activity;import android.util.DisplayMetrics;/** * 测绘工具类 */public final class MeasureUtil {/** * 获取屏幕尺寸 *  * @param activity *            Activity * @return 屏幕尺寸像素值，下标为0的值为宽，下标为1的值为高 */public static int[] getScreenSize(Activity activity) {DisplayMetrics metrics = new DisplayMetrics();activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);return new int[] { metrics.widthPixels, metrics.heightPixels };}}

MainActivity

package com.aigestudio.customviewdemo.activities;import android.app.Activity;import android.os.Bundle;import com.aigestudio.customviewdemo.R;import com.aigestudio.customviewdemo.views.CustomView;public class MainActivity extends Activity {private CustomView mCustomView;// 我们的自定义View@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// 获取控件mCustomView = (CustomView) findViewById(R.id.main_cv);}}

CustomView

package com.aigestudio.customviewdemo.views;import android.app.Activity;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.LightingColorFilter;import android.graphics.Paint;import android.util.AttributeSet;import android.view.View;import com.aigestudio.customviewdemo.R;public class CustomView extends View {private Paint mPaint;// 画笔private Context mContext;// 上下文环境引用private Bitmap bitmap;// 位图private int x, y;// 位图绘制时左上角的起点坐标private boolean isClick;// 用来标识控件是否被点击过，默认没有被点击 falsepublic CustomView(Context context) {this(context, null);}public CustomView(Context context, AttributeSet attrs) {super(context, attrs);mContext = context;// 初始化画笔initPaint();// 初始化资源initRes(context);this.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {/* * 判断控件是否被点击过 */if (isClick) {mPaint.setColorFilter(null);isClick = false;} else {// 点击后变为红色mPaint.setColorFilter(new LightingColorFilter(0xFFFFFFFF,0X00FF0000));isClick = true;}// 记得重绘invalidate();}});}/** * 初始化画笔 */private void initPaint() {// 实例化画笔mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);}/** * 初始化资源 */private void initRes(Context context) {// 获取位图bitmap = BitmapFactory.decodeResource(context.getResources(),R.drawable.a2);/* * 计算位图绘制时左上角的坐标使其位于屏幕中心 屏幕坐标x轴向左偏移位图一半的宽度 屏幕坐标y轴向上偏移位图一半的高度 */x = MeasureUtil.getScreenSize((Activity) mContext)[0] / 2- bitmap.getWidth() / 2;y = MeasureUtil.getScreenSize((Activity) mContext)[1] / 2- bitmap.getHeight() / 2;}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);// 绘制位图canvas.drawBitmap(bitmap, x, y, mPaint);}}