Android(安卓)自定义发送验证码, 倒计时

在开发时, 经常会写获取验证码倒计时这个控件, 因为刚接手别人的项目, 发现该项目中使用的控件有问题, 于是自己写了个

思路: 在button内实现onClick方法, 在onClick内处理倒计时等事情

效果图:

布局代码:

activity代码:

view代码:

public class IdentifyingCodeButton extends android.support.v7.widget.AppCompatButton {    private Handler handler;    private int time;    private Drawable canClickBackground;//可点击的时候背景    private Drawable cannotClickBackground;//不可点击的时候背景    private String defaultText;//默认文字    private int canClickTextColor = -1;//可点击时文字颜色    private int cannottClickTextColor = -1;//不可可点击时文字颜色    private int countTime = 60;    public IdentifyingCodeButton(Context context) {        this(context,null);    }    public IdentifyingCodeButton(Context context, AttributeSet attrs) {        this(context,attrs,0);    }    public IdentifyingCodeButton(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        handler = new Handler(){            @Override            public void handleMessage(Message msg) {                countDown();            }        };        defaultText = this.getText().toString().trim();        if (defaultText == null || defaultText.length() == 0){            defaultText = "获取验证码";            this.setText(defaultText);        }        this.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View view) {                time = countTime;                handler.sendEmptyMessage(0);            }        });    }    private void countDown(){        time--;        if (time != 0){            this.setText(time + "秒");            this.setClickable(false);            if (cannotClickBackground == null){                this.setBackgroundColor(Color.GRAY);            }else{                this.setBackground(cannotClickBackground);            }            if (cannottClickTextColor != -1){                this.setTextColor(cannottClickTextColor);            }            handler.sendEmptyMessageDelayed(0,1000);        }else{            this.setClickable(true);            this.setText(defaultText);            if (canClickBackground != null)                this.setBackground(canClickBackground);            if (canClickTextColor != -1){                this.setTextColor(canClickTextColor);            }        }    }    //设置倒计时时长   默认60秒    public void setTime(int time){        this.time = time;        this.countTime = time;    }    public void setCannotClickBackground(Drawable cannotClickBackground){        this.cannotClickBackground = cannotClickBackground;    }    public void setCanClickBackground(Drawable canClickBackground){        this.canClickBackground = canClickBackground;    }    public void setCanClickTextColor(int canClickTextColor) {        this.canClickTextColor = canClickTextColor;    }    public void setCannottClickTextColor(int cannottClickTextColor) {        this.cannottClickTextColor = cannottClickTextColor;    }}

原理很简单, 不同情况使用可以再修改完善

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