简单实现获取验证码view

简单实现获取验证码view

自定义TextView   内部自定义CountDownTimer实现倒计时

public class PassCodeTextView extends TextView {
    private MyCountDownTimer myCountDownTimer;


    public PassCodeTextView(Context context) {
        super(context);
        init();
    }

    public PassCodeTextView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public PassCodeTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        myCountDownTimer = new MyCountDownTimer(60000, 1000);
        myCountDownTimer.setTextView(this);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
    }

    public void startCountDown() {
        if (null != myCountDownTimer && getText().toString().contains("获取验证码")) {
            myCountDownTimer.start();
        }
    }

    class MyCountDownTimer extends CountDownTimer {
        private TextView textView;

        public MyCountDownTimer(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

        private void setTextView(TextView textView) {
            this.textView = textView;
        }

        @Override
        public void onTick(long millisUntilFinished) {
            textView.setClickable(false);
            textView.setText(millisUntilFinished / 1000 + "s");
        }

        @Override
        public void onFinish() {
            textView.setText("获取验证码");
            textView.setClickable(true);
        }
    }
}

使用：

public class MainActivity extends AppCompatActivity {
    private PassCodeTextView passCodeTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main9);
        passCodeTextView = findViewById(R.id.passcode);
        passCodeTextView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                passCodeTextView.startCountDown();
            }
        });

    }
}