自定义View(TopBar)

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1、在values下面创建一个atts.xml文件夹

<attr name="title1" format="string"/><attr name="titleSize1" format="dimension"/><attr name="titleColor1" format="color"/><attr name="leftText1" format="string"/><attr name="leftTextColor1" format="color"/><attr name="leftTextBackground1" format="reference|color"/><attr name="rightText1" format="string"/><attr name="rightTextColor1" format="color"/><attr name="rightTextBackground1" format="reference|color"/>

2、创建一个类继承RelativeLayoyt，先实例化里面的属性值

private Button leftButton;private Button rightButton;private TextView text;private String title;private float textSize;private int textColor;private String leftText;private Drawable leftBackground;private int leftTextColor;private String rightText;private Drawable rightBackground;private int rightTextColor;private LayoutParams leftParams, rightParams,titleParame;

3、实现里面的一个有两个参数的构造方法

public topBar(Context context, AttributeSet attrs) {    super(context, attrs);    TypedArray ta=context.obtainStyledAttributes(attrs,R.styleable.top);    title=ta.getString(R.styleable.top_title1);    textSize=ta.getDimension(R.styleable.top_titleSize1,0);    textColor=ta.getColor(R.styleable.top_titleColor1,0);    leftText=ta.getString(R.styleable.top_leftText1);    leftBackground=ta.getDrawable(R.styleable.top_leftTextBackground1);    leftTextColor=ta.getColor(R.styleable.top_leftTextColor1,0);     rightText=ta.getString(R.styleable.top_rightText1);     rightBackground=ta.getDrawable(R.styleable.top_rightTextBackground1);     rightTextColor=ta.getColor(R.styleable.top_rightTextColor1,0);     ta.recycle();

4、实例化自定义控件

//实例自定义化控件 leftButton=new Button(context); rightButton=new Button(context); text=new TextView(context);

5、给控件设置值

//给控件设置属性值text.setText(title);text.setTextSize(textSize);text.setTextColor(textColor);leftButton.setText(leftText);leftButton.setTextColor(leftTextColor);leftButton.setBackground(leftBackground);rightButton.setText(rightText);rightButton.setTextColor(rightTextColor);rightButton.setBackground(rightBackground);setBackgroundColor(0xFFF59563);

6、设置控件设置宽高属性

leftParams=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);leftParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT,TRUE);addView(leftButton,leftParams);rightParams=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);rightParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT,TRUE);addView(rightButton,rightParams);titleParame=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);titleParame.addRule(RelativeLayout.CENTER_IN_PARENT,TRUE);addView(text,titleParame);

7、接口回调

private topBarClientlisten listen;public interface topBarClientlisten{    public void leftClient();    public void rightClient();}public void TopBarClientListen(topBarClientlisten listen){    this.listen=listen;}

  leftButton.setOnClickListener(new OnClickListener() {        @Override        public void onClick(View v) {            listen.leftClient();        }    });    rightButton.setOnClickListener(new OnClickListener() {        @Override        public void onClick(View v) {            listen.rightClient();        }    });}public void setVisibaleView(boolean flag){    if(flag){       leftButton.setVisibility(View.VISIBLE);    }else{        leftButton.setVisibility(View.GONE);    }}

Main方法

topBar top= (topBar) findViewById(R.id.topbar);top.TopBarClientListen(new topBar.topBarClientlisten() {    @Override    public void leftClient() {        Intent intent=new Intent(MainActivity.this,TwoActivity.class);        startActivity(intent);    }    @Override    public void rightClient() {        Toast.makeText(MainActivity.this,"MROE",Toast.LENGTH_SHORT).show();    }});top.setVisibaleView(false);

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