delay search for searchTextView

README.md

Introduction

Search data from inputing text.

Talk is cheap. Show me the code.

I have two ways to archive it, as below.

• RxKotlin

// Create a calling self rx operation.
val subject = PublishSubject<String>().apply {
    compose(bindToLifecycle<String>())
    debounce(500, TimeUnit.MICROSECONDS)  // Delay 500ms.
    subscribeOn(Schedulers.io())
    observeOn(AndroidSchedulers.mainThread())
    doOnNext {
        // Search local data or remote data.
    }
    subscribe()
}

// Using RxBinding for search text view.
RxTextView.textChanges(textview).subscribe {
    if (!it.isNullOrEmpty())
        // Omitting the data.
        subject.onNext(it.toString())
}

• Handler + Thread

private handler: Handler = Handler()

private fun queryWithHandler(newText: String) {
    // Delay 500ms.
    if (delayQueryTask != null) {
        delayQueryTask.cancel()
        handler.removeCallbacksAndMessages(null)
    }
    delayQueryTask = DelayQueryRunnable(newText)
    handler.postDelayed(delayQueryTask, 500)
}

private inner class DelayQueryRunnable(internal var mText: String): Runnable {
    private var canceled = false

    override fun run() {
        if (canceled) {
            return
        }
        queryMatch(mText)
    }

    fun cancel() {
        canceled = true
    }
}