perf: 优化焦点获取

Author: ChenLittlePing

app/src/main/java/com/chenlittleping/filltextview/FillTextView.kt

@@ -147,6 +147,7 @@ class FillTextView: View, MyInputConnection.InputListener, View.OnKeyListener {
     }
 
     private fun init() {
+        isFocusable = true
         initCursorPaint()
         initTextPaint()
         initFillPaint()
@@ -482,6 +483,8 @@ class FillTextView: View, MyInputConnection.InputListener, View.OnKeyListener {
     }
 
     override fun onTouchEvent(event: MotionEvent): Boolean {
+        isFocusableInTouchMode = true
+        requestFocus()
         when (event.action) {
             MotionEvent.ACTION_DOWN -> {
                 if (touchCollision(event)) {

app/src/main/res/layout/activity_main.xml

@@ -11,10 +11,10 @@
             android:id="@+id/fillText"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:layout_alignParentBottom="true"
-            app:fillTextSize="16sp"
+            app:layout_constraintTop_toTopOf="parent"
             android:layout_marginLeft="10dp"
             android:layout_marginRight="10dp"
+            app:fillTextSize="16sp"
             app:rowSpace="3dp"
             app:fillColor="@android:color/holo_blue_dark"
             app:filledText="大家好，我是<fill>，我来自<fill>。我就是来填个空而已<fill>"/>