android实现验证码按钮

<?xml version="1.0" encoding="utf-8"?><resources>  <declare-styleable name="VerifyCodeButton">    <!--默认背景-->    <attr name="android:background" />    <!--点击后背景-->    <attr name="clickedBackground" format="reference" />    <!--倒计时间-->    <attr name="countdownTime" format="integer" />    <!--倒计时间后提示文字-->    <attr name="countdownText" format="string" />  </declare-styleable></resources>

public class VerifyCodeButton extends Button {  private Context mContext;  private int mClickedBackground;//点击后背景  private int mBackground;//当前背景  private String mCountdownownText;  private int mCountdownTime = 60;  private TimeCount mTimeCount;  public VerifyCodeButton(Context context) {    this(context, null);  }  public VerifyCodeButton(Context context, AttributeSet attrs) {    this(context, attrs, android.R.attr.buttonStyle);  }  public VerifyCodeButton(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);    mContext = context;    initAttrs(attrs);    init();  }  private void initAttrs(AttributeSet attrs) {    TypedArray typedArray = mContext.obtainStyledAttributes(attrs, R.styleable.VerifyCodeButton);    mBackground = typedArray.getResourceId(R.styleable.VerifyCodeButton_android_background, mBackground);    mClickedBackground = typedArray.getResourceId(R.styleable.VerifyCodeButton_clickedBackground, mClickedBackground);    mCountdownTime = typedArray.getInt(R.styleable.VerifyCodeButton_countdownTime, mCountdownTime);    mCountdownownText = typedArray.getString(R.styleable.VerifyCodeButton_countdownText);    typedArray.recycle();  }  private void init() {    setBackgroundResource(mBackground);    mTimeCount = new TimeCount(mCountdownTime * 1000, 1000);  }  /**   * 开始计时   */  public void start() {    mTimeCount.start();  }  /**   * 取消计时   */  public void cancle() {    mTimeCount.cancel();    setClickable(true);    setText(mCountdownownText != null ? mCountdownownText : "");    setBackgroundResource(mBackground);  }  class TimeCount extends CountDownTimer {    /**     * @param millisInFuture  总时间     * @param countDownInterval 间隔时间     */    public TimeCount(long millisInFuture, long countDownInterval) {      super(millisInFuture, countDownInterval);    }    /**     * @param millisUntilFinished 当前时间     */    @Override    public void onTick(long millisUntilFinished) {      setClickable(false);      setText(String.valueOf(millisUntilFinished / 1000 + "s"));      setBackgroundResource(mClickedBackground);    }    @Override    public void onFinish() {      setClickable(true);      setText(mCountdownownText != null ? mCountdownownText : "");      setBackgroundResource(mBackground);    }  }}

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"  android:shape="rectangle">  <corners android:radius="5dp" />  <solid android:color="#feacc3" /></shape>

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"  android:shape="rectangle">  <corners android:radius="5dp" />  <solid android:color="#999999" /></shape>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:app="http://schemas.android.com/apk/res-auto"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical"  tools:context="com.sample.verify.MainActivity">  <com.sample.verify.widget.VerifyCodeButton    android:id="@+id/btn_verify_code"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_gravity="center"    android:layout_margin="10dp"    android:background="@drawable/bg_btn_default"    android:gravity="center"    android:text="获取验证码"    android:textColor="#ffffff"    android:textSize="14sp"    app:clickedBackground="@drawable/bg_btn_clicked"    app:countdownText="重新获取"    app:countdownTime="10" />  <Button    android:id="@+id/btn_cancle"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_gravity="center_horizontal"    android:text="取消倒计时" /></LinearLayout>

package com.sample.verify;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Button;import com.sample.verify.widget.VerifyCodeButton;public class MainActivity extends AppCompatActivity implements View.OnClickListener {  private VerifyCodeButton btn_verify_code;  private Button btn_cancle;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    setTitle("验证码");    btn_verify_code = (VerifyCodeButton) findViewById(R.id.btn_verify_code);    btn_cancle = (Button) findViewById(R.id.btn_cancle);    btn_verify_code.setOnClickListener(this);    btn_cancle.setOnClickListener(this);  }  @Override  public void onClick(View v) {    switch (v.getId()) {      case R.id.btn_verify_code:        btn_verify_code.start();        break;      case R.id.btn_cancle:        btn_verify_code.cancle();        break;    }  }  @Override  protected void onDestroy() {    super.onDestroy();    if (btn_verify_code != null) {      btn_verify_code.cancle();    }  }}