Android自定义验证码输入框

Android开发的验证码输入框，输入够自动触发下一步

一、思路：

自定义验证码控件，监听每一个输入框

二、效果图：

看视频更直观点：

三、关键代码：

public class PhoneCode extends RelativeLayout {

    private Context context;
    private TextView tv_code1;
    private TextView tv_code2;
    private TextView tv_code3;
    private TextView tv_code4;
//    private TextView tv_code5;
//    private TextView tv_code6;
    private EditText et_code;
    private List<String> codes = new ArrayList<>();
    private InputMethodManager imm;

    public PhoneCode(Context context) {
        super(context);
        this.context = context;
        loadView();
    }

    public PhoneCode(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.context = context;
        loadView();
    }

    private void loadView() {
        imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
        View view = LayoutInflater.from(context).inflate(R.layout.phone_code, this);
        initView(view);
        initEvent();
    }

    private void initView(View view) {
        tv_code1 = (TextView) view.findViewById(R.id.tv_code1);
        tv_code2 = (TextView) view.findViewById(R.id.tv_code2);
        tv_code3 = (TextView) view.findViewById(R.id.tv_code3);
        tv_code4 = (TextView) view.findViewById(R.id.tv_code4);
//        tv_code5 = (TextView) view.findViewById(R.id.tv_code5);
//        tv_code6 = (TextView) view.findViewById(R.id.tv_code6);
        et_code = (EditText) view.findViewById(R.id.et_code);
        et_code.requestFocus();
//        et_code.setLongClickable(true);//支持长按
    }

    public EditText getEt_code() {
        return et_code;
    }

    public void clearCode() {
        tv_code1.setText("");
        tv_code2.setText("");
        tv_code3.setText("");
        tv_code4.setText("");
//        tv_code5.setText("");
//        tv_code6.setText("");
        codes.clear();
        setTvDrawable();
    }

    public void etGetFocus(){
        et_code.requestFocus();
    }

    private void initEvent() {
        //验证码输入
        et_code.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            }

            @Override
            public void afterTextChanged(Editable editable) {
                if (editable != null && editable.length() > 0) {
                    et_code.setText("");
                    if (codes.size() < 4) {
                        String data = editable.toString().trim();
                        if (data.length() >= 4) {
                            //将string转换成List
                            List<String> list = Arrays.asList(data.split(""));
                            //Arrays.asList没有实现add和remove方法，继承的AbstractList，需要将list放进java.util.ArrayList中
                            codes = new ArrayList<>(list);
                            if (!codes.isEmpty() && codes.size() > 4) {
                                //使用data.split("")方法会将""放进第一下标里需要去掉
                                codes.remove(0);
                            }
                        } else {
                            codes.add(data);
                        }
                        showCode();
                    }
                }
            }
        });
        // 监听验证码删除按键
        et_code.setOnKeyListener(new OnKeyListener() {
            @Override
            public boolean onKey(View view, int keyCode, KeyEvent keyEvent) {
                if (!codes.isEmpty()) {
                    if (keyCode == KeyEvent.KEYCODE_DEL && keyEvent.getAction() == KeyEvent.ACTION_DOWN && codes.size() > 0) {
                        codes.remove(codes.size() - 1);
                        showCode();
                        return true;
                    }
                }
                return false;
            }
        });



    }

    /**
     * 显示输入的验证码
     */
    private void showCode() {
        String code1 = "";
        String code2 = "";
        String code3 = "";
        String code4 = "";
        String code5 = "";
        String code6 = "";
        if (codes.size() >= 1) {
            code1 = codes.get(0);
        }
        if (codes.size() >= 2) {
            code2 = codes.get(1);
        }
        if (codes.size() >= 3) {
            code3 = codes.get(2);
        }
        if (codes.size() >= 4) {
            code4 = codes.get(3);
        }
        if (codes.size() >= 5) {
            code5 = codes.get(4);
        }
        if (codes.size() >= 6) {
            code6 = codes.get(5);
        }
        setTvDrawable();
        tv_code1.setText(code1);
        tv_code2.setText(code2);
        tv_code3.setText(code3);
        tv_code4.setText(code4);
//        tv_code5.setText(code5);
//        tv_code6.setText(code6);
        //setColor();//设置高亮颜色
        callBack();//回调
    }

四、项目demo源码结构图：

有问题或者需要完整demo源码的私信我，我每天都看私信的