SeniorUI33_自定义控件的概括
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2022-05-28 19:56:19
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SeniorUI_高级UI汇总目录
自定义控件一般分为三类：继承控件、自绘控件、组合控件
可以直接看第四部分： 自定义控件onMeasure的常见“套路”
一 继承控件
指继承系统的原生控件，修改或者装饰系统控件某些方法
- 看系统控件里面是否有控件 能够支持 （50%-80%）产品功能
- 在原有基础上 添加特定场景的产品功能。
1 Demo
public class ASpecImageView extends ImageView {
public ASpecImageView(Context context) {
super(context);
}
public ASpecImageView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
}
public ASpecImageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int desiredSizeWidth;
float aspect;
Drawable d = getDrawable();
if (d == null) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
return;
}
desiredSizeWidth = d.getIntrinsicWidth();
aspect = (float) d.getIntrinsicWidth() / (float) d.getIntrinsicHeight();
int widthsSize = View.resolveSize(desiredSizeWidth, widthMeasureSpec);
int heightSize = (int) (widthsSize/ aspect);
int specMode = MeasureSpec.getMode(heightMeasureSpec);
int specSize = MeasureSpec.getSize(heightMeasureSpec);
if (specMode == MeasureSpec.AT_MOST || specMode == MeasureSpec.EXACTLY) {
if (heightSize > specSize) {
heightSize = specSize;
widthsSize = (int) (heightSize * aspect);
}
}
setMeasuredDimension(widthsSize, heightSize);
}
}
2 效果
3 代码地址
二 自绘控件
- 系统的控件库中找不到 相似逻辑的额控件
- 完成 产品逻辑不规则 / 较为特殊的产品需求， 需要自己进行绘制
- 封装性/适配性
- 知识点 canvas path
invalidate();
postInvalidate();
1 Demo
public class DoubleImageView extends View {
/*Image Contents*/
private Drawable mLeftDrawable, mRightDrawable;
/*Text Contents*/
private CharSequence mText;
private StaticLayout mTextLayout;
/*Text Drawing*/
private TextPaint mTextPaint;
private Point mTextOrigin;
private int mSpacing;
private int desiredWidth;
public DoubleImageView(Context context) {
this(context, null);
}
public DoubleImageView(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0);
}
public DoubleImageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initView(context, attrs, defStyleAttr);
}
private void initView(Context context, AttributeSet attrs, int defStyle) {
mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
mTextOrigin = new Point(0, 0);
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.DoubleImageView, 0, defStyle);
Drawable d = a.getDrawable(R.styleable.DoubleImageView_android_drawableLeft);
if (d != null) {
setLeftDrawable(d);
}
d = a.getDrawable(R.styleable.DoubleImageView_android_drawableRight);
if (d != null) {
setRightDrawable(d);
}
int spacing = a.getDimensionPixelOffset(R.styleable.DoubleImageView_android_spacing, 0);
setSpacing(spacing);
int color = a.getColor(R.styleable.DoubleImageView_android_textColor, 0);
mTextPaint.setColor(color);
int rawSize = a.getDimensionPixelSize(R.styleable.DoubleImageView_android_textSize, 0);
mTextPaint.setTextSize(rawSize);
CharSequence text = a.getText(R.styleable.DoubleImageView_android_text);
setText(text);
a.recycle();
}
public void setLeftDrawableResource(int resId) {
Drawable d = getResources().getDrawable(resId);
setLeftDrawable(d);
}
public void setLeftDrawable(Drawable left) {
mLeftDrawable = left;
updateContentBounds();
invalidate();
}
public void setRightDrawableResource(int resId) {
Drawable d = getResources().getDrawable(resId);
setRightDrawable(d);
}
public void setRightDrawable(Drawable right) {
mRightDrawable = right;
updateContentBounds();
invalidate();
}
public void setSpacing(int spacing) {
mSpacing = spacing;
updateContentBounds();
invalidate();
}
public void setText(CharSequence text) {
if (!TextUtils.equals(mText, text)) {
mText = text;
updateContentBounds();
invalidate();
}
}
private void updateContentBounds() {
if (mText == null) {
mText = "";
}
float textWidth = mTextPaint.measureText(mText, 0, mText.length());
mTextLayout = new StaticLayout(mText, mTextPaint, (int) textWidth, Layout.Alignment.ALIGN_CENTER, 1f, 0f, true);
int left = (getWidth() - getDesiredWidth()) / 2;
int top = (getHeight() - getDesireHeight()) / 2;
if(mLeftDrawable != null){
mLeftDrawable.setBounds(left, top, left + mLeftDrawable.getIntrinsicWidth(), top + mLeftDrawable.getIntrinsicHeight());
left += (mLeftDrawable.getIntrinsicWidth() * 0.33f);
top += (mLeftDrawable.getIntrinsicHeight() * 0.33f);
}
if (mRightDrawable != null) {
mRightDrawable.setBounds(left, top, left + mRightDrawable.getIntrinsicWidth(), top + mRightDrawable.getIntrinsicHeight());
left = mRightDrawable.getBounds().right + mSpacing;
}
if (mTextLayout != null) {
top = (getHeight() - mTextLayout.getHeight()) /2;
mTextOrigin.set(left, top);
}
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
if (w != oldw || h != oldh) {
updateContentBounds();
invalidate();
}
}
@Override
protected void onDraw(Canvas canvas) {
if (mLeftDrawable != null) {
mLeftDrawable.draw(canvas);
}
if (mTextLayout != null) {
canvas.save();
canvas.translate(mTextOrigin.x, mTextOrigin.y);
mTextLayout.draw(canvas);
canvas.restore();
}
if (mRightDrawable != null) {
mRightDrawable.draw(canvas);
}
}
public int getDesiredWidth() {
int leftWidth;
if (mLeftDrawable == null) {
leftWidth = 0;
} else {
leftWidth = mLeftDrawable.getIntrinsicWidth();
}
int rightWidth;
if (mRightDrawable == null) {
rightWidth = 0;
} else {
rightWidth = mRightDrawable.getIntrinsicWidth();
}
int textWidth;
if (mTextLayout == null) {
textWidth = 0;
} else {
textWidth = mTextLayout.getWidth();
}
return (int) (leftWidth * 0.67f) + (int) (rightWidth * 0.67f) + mSpacing + textWidth;
}
private int getDesireHeight(){
int leftHeight;
if (mLeftDrawable == null) {
leftHeight = 0;
} else {
leftHeight = mLeftDrawable.getIntrinsicHeight();
}
int rightHeight;
if (mRightDrawable == null) {
rightHeight = 0;
} else {
rightHeight = mRightDrawable.getIntrinsicHeight();
}
return (int)(leftHeight * 0.67f) + (int)(rightHeight * 0.67f);
}
}
2 效果图
3 代码
三 组合控件
比较简单，注意属性的声明
1 Demo
public class CustomTextView extends RelativeLayout{
//文字
private String leftTvString;//左边文字
private String rightTvString;//右边文字
private String centerTvString;//中间文字
private String leftTopTvString;//左上文字
private String leftBottomTvString;//左下文字
private int leftTvSize;//左边文字大小
private int rightTvSize;//右边文字大小
private int centerTvSize;//中间文字大小
private int leftTopTvSize;//左上文字大小
private int leftBottomTvSize;//左下文字大小
private int leftTvMarginleft;//左边文字左边距
private int rightTvMarginright;//右边文字右边距
private int leftTopTvColor;//左上文字颜色
private int leftBottomTvColor;//左下文字颜色
private int leftTvColor;//左边文字颜色
private int rightTvColor;//右边文字颜色
private int centerTvColor;//中间文字颜色
//图片
private Drawable rightImgRes;//右边图片资源
private Drawable leftImgRes;//左边图片资源
private int leftImgWidht;//左边图片宽带
private int leftImgHeight;//左边图片高度
private int rightImgWidht;//右边图片宽带
private int rightImgHeight;//右边图片高度
private int leftImgMarginleft;//左边图片左边距
private int rightImgMarginright;//右边图片右边距
private int centerTVMarginleft;//中间文字左边距
private int leftTopTvMarginTop;//左上文字上边距
private int leftTopTvMarginleft;//左上文字左边就
private int leftBottomTvMarginleft;//左下文字左边距
private int leftButtomTvMarginBottom;//左下文字下边距
//下划线margin
private int bottomLineMargin;
private boolean bottomLineShow;
private int bottomLineHeight;
private int bottomcolor;
//一些默认属性
private int defaultTvColor = 0xFF373737;//文字默认颜色
private TextView leftTv, centerTv, rightTv,leftTopTv,leftBottomTv;
private ImageView leftIV, rightIV;
private View bottomView;
private Context mContext;
private OnTextViewClickListener OnTextViewClickListener;
public CustomTextView setOnTextViewClickListener(OnTextViewClickListener listener) {
this.OnTextViewClickListener = listener;
return this;
}
public CustomTextView(Context context, AttributeSet attrs) {
super(context, attrs);
this.mContext = context;
initAttr(attrs);
initLayout();
this.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (OnTextViewClickListener != null) {
OnTextViewClickListener.OnTextViewClick();
}
}
});
}
private void initAttr(AttributeSet attrs) {
TypedArray typedArray = mContext.obtainStyledAttributes(attrs, R.styleable.CustomTextView);
leftTvString = typedArray.getString(R.styleable.CustomTextView_leftTvString);
rightTvString = typedArray.getString(R.styleable.CustomTextView_rightTvString);
centerTvString = typedArray.getString(R.styleable.CustomTextView_centerTvString);
leftTopTvString = typedArray.getString(R.styleable.CustomTextView_leftTopTvString);
leftBottomTvString = typedArray.getString(R.styleable.CustomTextView_leftBottomTvString);
leftTvSize = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftTvSize, 16);
rightTvSize = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_rightTvSize, 16);
centerTvSize = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_centerTvSize, 16);
leftImgRes = typedArray.getDrawable(R.styleable.CustomTextView_leftImg);
rightImgRes = typedArray.getDrawable(R.styleable.CustomTextView_rightImg);
leftTvColor = typedArray.getColor(R.styleable.CustomTextView_leftTvColor, defaultTvColor);
rightTvColor = typedArray.getColor(R.styleable.CustomTextView_rightTvColor, defaultTvColor);
centerTvColor = typedArray.getColor(R.styleable.CustomTextView_centerTvColor, defaultTvColor);
leftImgWidht = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftImgWight, 0);
leftImgHeight = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftImgHeight, 0);
rightImgWidht = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_rightImgWidht, 0);
rightImgHeight = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_rightImgHeight, 0);
leftTvMarginleft = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftTvMarginleft, 0);
rightTvMarginright = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_rightTvMarginright, 0);
leftImgMarginleft = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftImgMarginleft, 0);
rightImgMarginright = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_rightImgMarginright, 0);
bottomLineMargin = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_bottomLineMargin, 0);
bottomLineShow = typedArray.getBoolean(R.styleable.CustomTextView_bottomLineShow, false);
bottomLineHeight = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_bottomLineHeight, 1);
bottomcolor = typedArray.getColor(R.styleable.CustomTextView_bottomcolor, defaultTvColor);
centerTVMarginleft = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_centerTVMarginleft, 0);
leftTopTvMarginTop = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftTopTvMarginTop, 0);
leftTopTvMarginleft = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftTopTvMarginleft, 0);
leftBottomTvMarginleft = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftBottomTvMarginleft, 0);
leftButtomTvMarginBottom = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftButtomTvMarginBottom, 0);
leftTopTvSize = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftTopTvSize, 16);
leftBottomTvSize = typedArray.getDimensionPixelOffset(R.styleable.CustomTextView_leftBottomTvSize, 16);
leftTopTvColor = typedArray.getColor(R.styleable.CustomTextView_leftTopTvColor, defaultTvColor);
leftBottomTvColor = typedArray.getColor(R.styleable.CustomTextView_leftBottomTvColor, defaultTvColor);
typedArray.recycle();
}
private void initLayout() {
//左边图片初始化
if (leftImgRes != null) {
initLeftImg();
}
//左边文字初始化
if (!TextUtils.isEmpty(leftTvString)) {
initLeftTv();
}
//中间文字初始化
if (!TextUtils.isEmpty(centerTvString)) {
initCenterTv();
}
//左上文字初始化
if(!TextUtils.isEmpty(leftTopTvString)){
initLeftTopTv();
}
//左下文字初始化
if(!TextUtils.isEmpty(leftBottomTvString)){
initLeftBottomTv();
}
//右边图片初始化
if (rightImgRes != null) {
initRightImg();
}
//右边的文字初始
if (!TextUtils.isEmpty(rightTvString)) {
initRightTv();
}
//下边线初始化
if (bottomLineShow) {
initBottomLine();
}
}
//以下是设置字体和图片的属性，，为了适配最好不要动态设置与数字有关的属性
//代码设置左边文字
public CustomTextView setLeftTv(String tvStr, String tvColor) {
leftTvString = TextUtils.isEmpty(tvStr) ? leftTvString : tvStr;
leftTvColor = TextUtils.isEmpty(tvColor) ? leftTvColor : Color.parseColor(tvColor);
if (leftTv == null) {
initLeftTv();
} else {
leftTv.setText(leftTvString);
leftTv.setTextColor(leftTvColor);
}
return this;
}
//代码设置右边文字
public CustomTextView setRightTv(String tvStr, String tvColor) {
rightTvString = TextUtils.isEmpty(tvStr) ? rightTvString : tvStr;
rightTvColor = TextUtils.isEmpty(tvColor) ? rightTvColor : Color.parseColor(tvColor);
if (rightTv == null) {
initRightTv();
} else {
rightTv.setText(rightTvString);
rightTv.setTextColor(rightTvColor);
}
return this;
}
//代码设置中间文字
public CustomTextView setCenterTv(String tvStr, String tvColor) {
centerTvString = TextUtils.isEmpty(tvStr) ? centerTvString : tvStr;
centerTvColor = TextUtils.isEmpty(tvColor) ? centerTvColor : Color.parseColor(tvColor);
if (centerTv == null) {
initCenterTv();
} else {
centerTv.setText(centerTvString);
centerTv.setTextColor(centerTvColor);
}
return this;
}
//代码设置左上文字颜色
public CustomTextView setLeftTopTv(String tvStr,String tvColor){
leftTopTvString=TextUtils.isEmpty(tvStr)?leftTopTvString:tvStr;
leftTopTvColor=TextUtils.isEmpty(tvColor)?leftTopTvColor:Color.parseColor(tvColor);
if(leftTopTv==null){
initLeftTopTv();
}else{
leftTopTv.setTextColor(leftTopTvColor);
leftTopTv.setText(leftTopTvString);
}
return this;
}
//代码设置左下文字颜色
public CustomTextView setLeftBottomTv(String tvStr,String tvColor){
leftBottomTvString=TextUtils.isEmpty(tvStr)?leftBottomTvString:tvStr;
leftBottomTvColor=TextUtils.isEmpty(tvColor)?leftBottomTvColor:Color.parseColor(tvColor);
if(leftBottomTv==null){
initLeftBottomTv();
}else{
leftBottomTv.setTextColor(leftBottomTvColor);
leftBottomTv.setText(leftBottomTvString);
}
return this;
}
//代码设置布局背景颜色
public CustomTextView setCustomTvBackground(String strColor){
CustomTextView.this.setBackgroundColor(Color.parseColor(strColor));
return this;
}
//代码设置左边图片
public CustomTextView setLeftImg(Drawable icRes) {
leftImgRes = icRes;
if (leftIV == null) {
initLeftImg();
} else {
leftIV.setImageDrawable(leftImgRes);
}
return this;
}
//代码设置右边图片
public CustomTextView setRightImg(Drawable icRes) {
rightImgRes = icRes;
if (rightIV == null) {
initRightImg();
} else {
rightIV.setImageDrawable(rightImgRes);
}
return this;
}
//设置下划线
public CustomTextView setBottomLine(String color) {
bottomcolor = TextUtils.isEmpty(color) ? bottomcolor : Color.parseColor(color);
if (bottomView == null) {
initBottomLine();
} else {
bottomView.setBackgroundColor(bottomcolor);
}
return this;
}
private void initLeftImg() {
leftIV = new ImageView(mContext);
int width = leftImgWidht != 0 ? leftImgWidht : LayoutParams.WRAP_CONTENT;
int height = leftImgHeight != 0 ? leftImgHeight : LayoutParams.WRAP_CONTENT;
LayoutParams leftImgParams = new LayoutParams(width, height);
leftImgParams.addRule(ALIGN_PARENT_LEFT, TRUE);
leftImgParams.addRule(RelativeLayout.CENTER_VERTICAL, TRUE);
leftImgParams.setMargins(leftImgMarginleft, 0, 0, 0);
leftIV.setScaleType(ImageView.ScaleType.FIT_XY);
leftIV.setId(R.id.leftImg);
leftIV.setLayoutParams(leftImgParams);
leftIV.setImageDrawable(leftImgRes);
leftIV.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (OnTextViewClickListener != null) {
OnTextViewClickListener.OnLeftImgClick();
}
}
});
addView(leftIV);
}
private void initLeftTv() {
leftTv = new TextView(mContext);
LayoutParams leftTvParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
leftTvParams.addRule(RelativeLayout.CENTER_VERTICAL, TRUE);
leftTvParams.addRule(RelativeLayout.RIGHT_OF, R.id.leftImg);
leftTvParams.setMargins(leftTvMarginleft, 0, 0, 0);
leftTv.setLayoutParams(leftTvParams);
leftTv.setTextColor(leftTvColor);
leftTv.setId(R.id.leftTv);
leftTv.setTextSize(TypedValue.COMPLEX_UNIT_PX, leftTvSize);
leftTv.setText(leftTvString);
addView(leftTv);
}
private void initCenterTv() {
centerTv = new TextView(mContext);
LayoutParams centerTvParams = new LayoutParams(LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
centerTvParams.addRule(centerTVMarginleft != 0 && !TextUtils.isEmpty(leftTvString) ? RelativeLayout.RIGHT_OF : RelativeLayout.CENTER_IN_PARENT, centerTVMarginleft != 0 && !TextUtils.isEmpty(leftTvString) ? R.id.leftTv : TRUE);
centerTvParams.addRule(RelativeLayout.CENTER_VERTICAL);
centerTvParams.setMargins(centerTVMarginleft, 0, 0, 0);
centerTv.setLayoutParams(centerTvParams);
centerTv.setTextColor(centerTvColor);
centerTv.setTextSize(TypedValue.COMPLEX_UNIT_PX, centerTvSize);
centerTv.setText(centerTvString);
addView(centerTv);
}
private void initLeftTopTv(){
leftTopTv=new TextView(mContext);
LayoutParams leftTopTvParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
leftTopTvParams.addRule(RelativeLayout.RIGHT_OF, R.id.leftImg);
leftTopTvParams.addRule(RelativeLayout.ALIGN_PARENT_TOP,TRUE);
leftTopTvParams.setMargins(leftTopTvMarginleft,leftTopTvMarginTop,0,0);
leftTopTv.setLayoutParams(leftTopTvParams);
leftTopTv.setTextSize(TypedValue.COMPLEX_UNIT_PX,leftTopTvSize);
leftTopTv.setTextColor(leftTopTvColor);
leftTopTv.setText(leftTopTvString);
addView(leftTopTv);
}
private void initLeftBottomTv(){
leftBottomTv=new TextView(mContext);
LayoutParams leftBottomTvParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
leftBottomTvParams.addRule(RelativeLayout.RIGHT_OF, R.id.leftImg);
leftBottomTvParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM,TRUE);
leftBottomTvParams.setMargins(leftBottomTvMarginleft,0,0,leftButtomTvMarginBottom);
leftBottomTv.setLayoutParams(leftBottomTvParams);
leftBottomTv.setTextSize(TypedValue.COMPLEX_UNIT_PX,leftBottomTvSize);
leftBottomTv.setTextColor(leftBottomTvColor);
leftBottomTv.setText(leftBottomTvString);
addView(leftBottomTv);
}
private void initRightImg() {
rightIV = new ImageView(mContext);
int width = rightImgWidht != 0 ? rightImgWidht : LayoutParams.WRAP_CONTENT;
int height = rightImgHeight != 0 ? rightImgHeight : LayoutParams.WRAP_CONTENT;
LayoutParams rightIVParams = new LayoutParams(width, height);
rightIVParams.addRule(RelativeLayout.CENTER_VERTICAL, TRUE);
rightIVParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, TRUE);
rightIVParams.setMargins(0, 0, rightImgMarginright, 0);
rightIV.setScaleType(ImageView.ScaleType.FIT_XY);
rightIV.setId(R.id.rightImg);
rightIV.setLayoutParams(rightIVParams);
rightIV.setImageDrawable(rightImgRes);
rightIV.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (OnTextViewClickListener != null) {
OnTextViewClickListener.OnRightImgClick();
}
}
});
addView(rightIV);
}
private void initRightTv() {
rightTv = new TextView(mContext);
LayoutParams rightTvParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
rightTvParams.addRule(rightImgRes != null ? RelativeLayout.LEFT_OF : RelativeLayout.ALIGN_PARENT_RIGHT, rightImgRes != null ? R.id.rightImg : TRUE);
rightTvParams.addRule(RelativeLayout.CENTER_VERTICAL);
rightTvParams.setMargins(0, 0, rightTvMarginright, 0);
rightTv.setLayoutParams(rightTvParams);
rightTv.setTextColor(rightTvColor);
rightTv.setTextSize(TypedValue.COMPLEX_UNIT_PX, rightTvSize);
rightTv.setText(rightTvString);
rightTv.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (OnTextViewClickListener != null) {
OnTextViewClickListener.OnRightTvClick();
}
}
});
addView(rightTv);
}
private void initBottomLine() {
bottomView = new View(mContext);
LayoutParams bottomParams = new LayoutParams(LayoutParams.WRAP_CONTENT, bottomLineHeight);
bottomParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, TRUE);
bottomParams.setMargins(bottomLineMargin, 0, bottomLineMargin, 0);
bottomView.setLayoutParams(bottomParams);
bottomView.setBackgroundColor(bottomcolor);
addView(bottomView);
}
//点击事件接口
public static class OnTextViewClickListener {
public void OnLeftImgClick() {
}
public void OnRightImgClick() {
}
public void OnTextViewClick() {
}
public void OnRightTvClick() {
}
}
}
2 效果图
3 代码
四 自定义控件onMeasure的常见“套路”
1 继承自View的子类
只需要重写onMeasure测量好自己的宽高就可以了。
最终调用setMeasuredDimension()保存好自己的测量宽高。
int mode = MeasureSpec.getMode(widthMeasureSpec);
int Size = MeasureSpec.getSize(widthMeasureSpec);
int viewSize = 0;
switch(mode){
case MeasureSpec.EXACTLY:
viewSize = size;//当前view的尺寸就为父容器的尺寸
break;
case MeasureSpec.AT_MOST:
viewSize = Math.min(size, getContentSize());//当前view的尺寸就为内容尺寸和费容器尺寸当中的最小值。
break;
case MeasureSpec.UNSPECIFIED:
viewSize = getContentSize();//内容有多大，久设置多大尺寸。
break;
default:
break;
}
view 提供的api： public static int resolveSize(int size, int measureSpec)
2 继承自ViewGroup的子类
不但需要重写onMeasure测量自己，还要测量子控件的规格大小。
可以直接使用ViewGroup的工具方法来测量里面的子控件，也可以自己来实现这一套子控件的测量（比如：RelativeLayout）
//1.测量自己的尺寸
ViewGroup.onMeasure();
//1.1 为每一个child计算测量规格信息(MeasureSpec)
ViewGroup.getChildMeasureSpec();
//1.2 将上面测量后的结果，传给每一个子View，子view测量自己的尺寸
child.measure();
//1.3 子View测量完，ViewGroup就可以拿到这个子View的测量后的尺寸了
child.getChildMeasuredSize();//child.getMeasuredWidth()和child.getMeasuredHeight()
//1.4ViewGroup自己就可以根据自身的情况(Padding等等),来计算自己的尺寸
ViewGroup.calculateSelfSize();
//2.保存自己的尺寸
ViewGroup.setMeasuredDimension(size);
ViewGroup中提供的Measure相关的api:
measureChild
measureChildren(所有)
measureChildWithMargins
getChildMeasureSpec