1拯啦、彈窗

點(diǎn)擊完按鈕彈出一個(gè)彈窗，等后續(xù)的事件執(zhí)行完成之后再關(guān)閉彈窗熔任，但是這種做法用戶體驗(yàn)較差褒链，并且適用的場(chǎng)景比較單一，只能在網(wǎng)絡(luò)請(qǐng)求或者其他耗時(shí)操作的時(shí)候使用笋敞。

ProgressDialog progressDialog = new ProgressDialog(this);
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progressDialog.setIndeterminate(false);
progressDialog.show();

2、禁用按鈕

點(diǎn)擊完按鈕之后禁用該按鈕荠瘪，等后續(xù)事件執(zhí)行完之后再啟用按鈕夯巷。跟彈出彈窗一個(gè)邏輯，也是適用場(chǎng)景比較單一哀墓。

mBtn.setEnabled(false);

3趁餐、根據(jù)點(diǎn)擊間隔時(shí)間判斷

這種方法比較常用，任何點(diǎn)擊事件都可以使用篮绰，缺點(diǎn)是每個(gè)點(diǎn)擊事件都要進(jìn)行判斷后雷，冗余代碼較多。

public class FastClickUtil {

    /**
     * 上次點(diǎn)擊的view的Id
     */
    private static int mLastViewId = -1;
    /**
     * 上次點(diǎn)擊的時(shí)間
     */
    private static long mLastClickTime = 0L;
    /**
     * 兩次點(diǎn)擊時(shí)間間隔
     */
    private static final long FAST_CLICK_DELAY_DURATION = 500L;

    public static boolean isFastClick() {
        return isFastClick(-1, FAST_CLICK_DELAY_DURATION);
    }

    public static boolean isFastClick(int viewId) {
        return isFastClick(viewId, FAST_CLICK_DELAY_DURATION);
    }

    public static boolean isFastClick(int viewId, long delayDuration) {
        long currentTime = System.currentTimeMillis();
        long diffTime = currentTime - mLastClickTime;

        if (viewId == mLastViewId && mLastClickTime > 0 && diffTime < delayDuration) {
            return true;
        }

        mLastViewId = viewId;
        mLastClickTime = currentTime;

        return false;
    }
}

4、AOP

使用Java切面臀突，用注解的形式來(lái)實(shí)現(xiàn)勉抓。好處是使用的時(shí)候很簡(jiǎn)潔，一個(gè)注解即可候学。缺點(diǎn)是需要引入相關(guān)的庫(kù)和插件藕筋，并且可能因?yàn)榛煜鹨恍﹩?wèn)題。

引入依賴：

在項(xiàng)目根目錄下的build.gradle中引入gradle-android-plugin-aspectjx：

buildscript {
    ...
    dependencies {
        ...
        classpath "com.hujiang.aspectjx:gradle-android-plugin-aspectjx:2.0.10"
    }
}

在module下的build.gradle中引入依賴：

dependencies {
    ...
    implementation 'org.aspectj:aspectjrt:1.9.5'
}

在module下的build.gradle中應(yīng)用插件：

plugins {
    ...
    id 'android-aspectjx'
}

同步項(xiàng)目梳码。

添加注解：

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface SingleClick {
    //間隔時(shí)間
    long value() default 500;
}

工具類：

public class FastClickUtil {

    private static long mLastClickTime;
    private static int mLastClickViewId;

    public static boolean isFastClick(View view, long intervalMillis) {
        int viewId = view.getId();
        long time = System.currentTimeMillis();
        long timeInterval = Math.abs(time - mLastClickTime);

        if (viewId == mLastClickViewId && timeInterval < intervalMillis) {
            return true;
        }

        mLastClickTime = time;
        mLastClickViewId = viewId;
        return false;
    }

}

實(shí)現(xiàn)AOP操作：

@Aspect
public class SingleClickAspect {

    @Pointcut("execution(@site.exciter.lib.fastclick.SingleClick * *(..))")
    public void methodAnnotated() {

    }

    @Around("methodAnnotated()")
    public void aroundJoinPoint(ProceedingJoinPoint joinPoint) throws Throwable {
        View view = null;
        for (Object arg : joinPoint.getArgs()) {
            if (arg instanceof View) {
                view = (View) arg;
                break;
            }
        }

        if (view == null) {
            return;
        }

        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        Method method = methodSignature.getMethod();
        if (!method.isAnnotationPresent(SingleClick.class)) {
            return;
        }

        SingleClick singleClick = method.getAnnotation(SingleClick.class);
        if (singleClick != null && !FastClickUtil.isFastClick(view, singleClick.value())) {
            joinPoint.proceed();
        }
    }

}

使用：

@SingleClick(1000)
public void onClick(View view) {
    ...
}

5隐圾、通過(guò)Listener攔截

實(shí)現(xiàn)View.OnClickListener，根據(jù)時(shí)間差去攔截點(diǎn)擊事件掰茶。

public abstract class ClickProtector implements View.OnClickListener {

    /**
     * 點(diǎn)擊間隔
     */
    private long mDelay = 0;

    /**
     * 實(shí)際點(diǎn)擊事件
     *
     * @param view View
     */
    abstract void onRealClick(View view);

    public ClickProtector delay(long delay) {
        this.mDelay = delay;
        return this;
    }

    @Override
    public void onClick(View view) {
        int key = view.hashCode();
        Long lastTime = (Long) view.getTag(key);

        //已經(jīng)點(diǎn)擊過(guò)并且時(shí)間差小于設(shè)定的點(diǎn)擊間隔暇藏，就攔截
        if (lastTime != null && System.currentTimeMillis() - lastTime < mDelay) {
            return;
        }

        //觸發(fā)點(diǎn)擊事件
        onRealClick(view);

        //記錄本次點(diǎn)擊的時(shí)間
        view.setTag(key, System.currentTimeMillis());
    }
}

使用：

findViewById(R.id.btn_click).setOnClickListener(new ClickProtector() {
            @Override
            void onRealClick(View view) {
                Toast.makeText(RepeatClickActivity.this, "點(diǎn)擊了按鈕", Toast.LENGTH_SHORT).show();
            }
        }.delay(500));

關(guān)注木水小站 (zhangmushui.cn)和微信公眾號(hào)【木水Code】，及時(shí)獲取更多最新技術(shù)干貨濒蒋。