自由控制灰度或原色ImageView

来源：互联网发布：视频监控软件破解版编辑：程序博客网时间：2024/06/02 23:16

通过 setGary方法来控制是否显示灰度图片

import android.content.Context;import android.graphics.Canvas;import android.graphics.ColorMatrix;import android.graphics.ColorMatrixColorFilter;import android.graphics.drawable.Drawable;import android.support.annotation.Nullable;import android.util.AttributeSet;import android.widget.ImageView;/** * Created by junjie on 2016/6/24. */public class MyGaryImageView extends ImageView {    private boolean isGray = false;    public void setGray(boolean isGray){        this.isGray = isGray;        postInvalidate();    }    public MyGaryImageView(Context context) {        super(context);    }    public MyGaryImageView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public MyGaryImageView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onDraw(Canvas canvas) {        if(getDrawable() == null){            return;        }        setImageDrawable(getDrawable());        super.onDraw(canvas);    }    public void setImageDrawable(@Nullable Drawable drawable) {        if(drawable == null){            return;        }        if(!isGray){            super.setImageDrawable(drawable);        }else {            super.setImageDrawable(getDrawable(drawable));        }    }    public Drawable getDrawable(Drawable drawable){        drawable.mutate();        ColorMatrix cm = new ColorMatrix();        cm.setSaturation(0);        ColorMatrixColorFilter cf = new ColorMatrixColorFilter(cm);        drawable.setColorFilter(cf);        return drawable;    }}

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