Created
September 17, 2018 08:57
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<?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:animateLayoutChanges="true" | |
android:orientation="vertical" | |
tools:context=".MainActivity"> | |
<android.support.v7.widget.SearchView | |
android:id="@+id/searchView" | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" | |
app:iconifiedByDefault="false" /> | |
<TextView | |
android:layout_marginStart="16dp" | |
android:layout_marginEnd="16dp" | |
android:textColor="@android:color/holo_red_dark" | |
android:layout_width="wrap_content" | |
android:layout_height="wrap_content" | |
android:id="@+id/occurrenceTextView"/> | |
<ScrollView | |
android:clipToPadding="true" | |
android:layout_margin="16dp" | |
android:layout_width="match_parent" | |
android:layout_height="match_parent"> | |
<TextView | |
android:textAppearance="@style/TextAppearance.AppCompat.Body1" | |
android:id="@+id/textView" | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" /> | |
</ScrollView> | |
</LinearLayout> |
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import android.app.Activity | |
import android.graphics.Color | |
import android.graphics.Paint | |
import android.os.Bundle | |
import android.support.v7.widget.SearchView | |
import android.text.SpannableString | |
import android.text.style.BackgroundColorSpan | |
import android.util.Log | |
import kotlinx.android.synthetic.main.activity_main.* | |
import android.text.Spanned | |
class MainActivity : Activity() { | |
lateinit var data: String | |
override fun onCreate(savedInstanceState: Bundle?) { | |
super.onCreate(savedInstanceState) | |
setContentView(R.layout.activity_main) | |
data = getString(R.string.data) | |
textView.text = data | |
searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener { | |
override fun onQueryTextSubmit(query: String?): Boolean { | |
return false | |
} | |
override fun onQueryTextChange(newText: String): Boolean { | |
highlightText(newText) | |
return false | |
} | |
}) | |
occurrenceTextView.paintFlags = Paint.UNDERLINE_TEXT_FLAG | |
} | |
private fun highlightText(s: String) { | |
var occurrence = 0 | |
val spannableString = SpannableString(textView.text) | |
val backgroundColorSpans = | |
spannableString.getSpans(0, spannableString.length, BackgroundColorSpan::class.java) | |
backgroundColorSpans.forEach { spannableString.removeSpan(it) } | |
var index = spannableString.toString().indexOf(s) | |
while (index > 0) { | |
occurrence += 1 | |
spannableString.setSpan(BackgroundColorSpan(Color.GREEN), index, | |
index + s.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE) | |
index = spannableString.toString().indexOf(s, index + s.length) | |
} | |
textView.text = spannableString | |
occurrenceTextView.text = "this word occurred $occurrence times" | |
} | |
private fun Any.log() = | |
Log.d("MEGA", this.toString()) | |
} | |
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