import com.flyco.tablayout.R; //导入依赖的package包/类
private void obtainAttributes(Context context, AttributeSet attrs) {
    TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.MsgView);
    backgroundColor = ta.getColor(R.styleable.MsgView_mv_backgroundColor, Color.TRANSPARENT);
    cornerRadius = ta.getDimensionPixelSize(R.styleable.MsgView_mv_cornerRadius, 0);
    strokeWidth = ta.getDimensionPixelSize(R.styleable.MsgView_mv_strokeWidth, 0);
    strokeColor = ta.getColor(R.styleable.MsgView_mv_strokeColor, Color.TRANSPARENT);
    isRadiusHalfHeight = ta.getBoolean(R.styleable.MsgView_mv_isRadiusHalfHeight, false);
    isWidthHeightEqual = ta.getBoolean(R.styleable.MsgView_mv_isWidthHeightEqual, false);

    ta.recycle();
}
 

import com.flyco.tablayout.R; //导入依赖的package包/类
public void setBgSelector() {
    StateListDrawable bg = new StateListDrawable();

    setDrawable(gd_background, backgroundColor, strokeColor);
    bg.addState(new int[]{-android.R.attr.state_pressed}, gd_background);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {//16
        setBackground(bg);
    } else {
        //noinspection deprecation
        setBackgroundDrawable(bg);
    }
}