组合控件 TopBar

自定义组合控件 定义类继承RelativeLayout

public class TopBar extends RelativeLayout {

//topBar上的元素

private Button leftButton, rightButton;

private TextView mTitle;

//布局属性，控制元素在viewgroup的位置

private LayoutParams lParams, rParams, mParams;

//中间文字的属性值

private String title;

private float titleSize;

private int titleColor;

private Drawable titleBackgroundColor;

//左按钮的属性值

private String leftButtonText;

private float leftButtonSize;

private int leftButtonColor;

private Drawable leftButtonBackgroundColor;

//右按钮的属性值

private String rightButtonText;

private float rightButtonSize;

private int rightButtonColor;

private Drawable rightButtonBackgroundColor;

//注册接口成员属性

private TopBarClickListener topBarClickListener;

public TopBar(Context context) {

super(context);

}

public TopBar(Context context, @Nullable AttributeSet attrs) {

super(context, attrs);

initAttrs(context, attrs);

}

public TopBar(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

initAttrs(context, attrs);

}

//定义控件属性的方法

private void initAttrs(Context context, AttributeSet attrs) {

setBackgroundColor(0xFFF59563);

TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.TopBar);

// 从TypedArray中取出对应的值来为要设置的属性赋值

title = typedArray.getString(R.styleable.TopBar_title);

titleSize = typedArray.getDimension(R.styleable.TopBar_titleSize,10);

titleColor = typedArray.getColor(R.styleable.TopBar_titleColor ,0);

titleBackgroundColor = typedArray.getDrawable(R.styleable.TopBar_titleBackGroundColor);

leftButtonText = typedArray.getString(R.styleable.TopBar_leftText);

leftButtonSize = typedArray.getDimension(R.styleable.TopBar_leftTextSize,10);

leftButtonColor = typedArray.getColor(R.styleable.TopBar_leftTextColor,0);

leftButtonBackgroundColor = typedArray.getDrawable(R.styleable.TopBar_leftTextBackGroundColor);

rightButtonText = typedArray.getString(R.styleable.TopBar_rightText);

rightButtonSize = typedArray.getDimension(R.styleable.TopBar_rightTextSize,10);

rightButtonColor = typedArray.getColor(R.styleable.TopBar_rightTextColor,0);

rightButtonBackgroundColor = typedArray.getDrawable(R.styleable.TopBar_rightTextBackGroundColor);

// recyle方法来避免重新创建的时候的错误

typedArray.recycle();

//实例元素组件

leftButton = new Button(context);

rightButton = new Button(context);

mTitle = new TextView(context);

//给元素组件赋值

mTitle.setText(title);

mTitle.setTextSize(titleSize);

mTitle.setTextColor(titleColor);

mTitle.setBackground(titleBackgroundColor);

leftButton.setText(leftButtonText);

leftButton.setTextSize(leftButtonSize);

leftButton.setTextColor(leftButtonColor);

leftButton.setBackground(leftButtonBackgroundColor);

rightButton.setText(rightButtonText);

rightButton.setTextSize(rightButtonSize);

rightButton.setTextColor(rightButtonColor);

rightButton.setBackground(rightButtonBackgroundColor);

//为元素组件设置布局

lParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);

lParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT, TRUE);

addView(leftButton,lParams);

mParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);

mParams.addRule(RelativeLayout.CENTER_IN_PARENT,TRUE);

addView(mTitle,mParams);

rParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);

rParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT,TRUE);

addView(rightButton,rParams);

//按钮点击监听，调用接口

leftButton.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

topBarClickListener.leftClick();

}

});

rightButton.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

topBarClickListener.rightClick();

}

});

}

public interface TopBarClickListener {

//左按钮点击

void leftClick();

//右按钮点击

void rightClick();

}

//给接口定义set方法   可定义监听事件

public void setTopBarClickListener(TopBarClickListener topBarClickListener) {

this.topBarClickListener = topBarClickListener;

}

}

values文件夹下新建arrts

<declare-styleable name="TopBar">

<attr name="title" format="string">

<attr name="titleSize" format="dimension">

<attr name="titleColor" format="color">

<attr name="titleBackGroundColor" format="reference|color">

<attr name="leftText" format="string">

<attr name="leftTextSize" format="dimension">

<attr name="leftTextColor" format="color">

<attr name="leftTextBackGroundColor" format="reference|color">

<attr name="rightText" format="string">

<attr name="rightTextSize" format="dimension">

<attr name="rightTextColor" format="color">

<attr name="rightTextBackGroundColor" format="reference|color">

在布局中可直接使用定义好的控件