Bump up versions of dependencies (google#338)

After this change, minSdkVersion is going to be 14 since the support library 26 isn't able to set the minSdkVersion lower than 14.

Also findViewById now requires type inference. Modified the code that uses findViewById.

build.gradle

@@ -18,17 +18,17 @@
 
 buildscript {
     ext {
-        minSdkVersion = 9
-        targetSdkVersion = 25
-        compileSdkVersion = 25
-        buildToolsVersion = "25.0.3"
+        minSdkVersion = 14
+        targetSdkVersion = 26
+        compileSdkVersion = 26
+        buildToolsVersion = "26.0.0"
         androidGradlePluginVersion = "2.3.3"
         androidMavenGradlePluginVersion = "1.5"
         gradleBintrayPluginVersion = "1.6"
         kotlinVersion = "1.1.3"
-        supportLibVersion = "25.3.1"
-        espressoVersion = "2.2.2"
-        testRunnerVersion = "0.5"
+        supportLibVersion = "26.0.0"
+        espressoVersion = "3.0.0"
+        testRunnerVersion = "1.0.0"
         junitVersion = "4.12"
     }
 

circle.yml

@@ -6,7 +6,7 @@ machine:
 
 dependencies:
     pre:
-        - echo y | android update sdk --no-ui --all --filter "android-25,build-tools-25.0.3,tools,platform-tools,extra-android-m2repository"
+        - echo y | android update sdk --no-ui --all --filter "android-26,build-tools-26.0.0,tools,platform-tools,extra-android-m2repository"
     cache_directories:
         - ~/.android
     override:

demo-cat-gallery/src/main/java/com/google/android/flexbox/apps/catgallery/CatViewHolder.kt

@@ -27,7 +27,7 @@ import com.google.android.flexbox.FlexboxLayoutManager
  */
 internal class CatViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
 
-    private val imageView = itemView.findViewById(R.id.imageview) as ImageView
+    private val imageView: ImageView = itemView.findViewById(R.id.imageview)
 
     internal fun bindTo(@DrawableRes drawableRes: Int) {
         imageView.setImageResource(drawableRes)

demo-cat-gallery/src/main/java/com/google/android/flexbox/apps/catgallery/MainActivity.kt

@@ -38,7 +38,7 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        val toolbar = findViewById(R.id.toolbar) as Toolbar
+        val toolbar: Toolbar = findViewById(R.id.toolbar)
         setSupportActionBar(toolbar)
 
         val flexboxLayoutManager = FlexboxLayoutManager(this).apply {
@@ -47,7 +47,7 @@ class MainActivity : AppCompatActivity() {
             alignItems = AlignItems.STRETCH
         }
 
-        val recyclerView = findViewById(R.id.recyclerview) as RecyclerView
+        val recyclerView: RecyclerView = findViewById(R.id.recyclerview)
         recyclerView.apply {
             layoutManager = flexboxLayoutManager
             adapter = CatAdapter()

demo-playground/src/main/java/com/google/android/flexbox/FlexItemEditFragment.kt

@@ -94,9 +94,8 @@ internal class FlexItemEditFragment : DialogFragment() {
         dialog.setTitle((viewIndex + 1).toString())
 
         val activity = activity
-        val orderTextInput = view
-                .findViewById(R.id.input_layout_order) as TextInputLayout
-        val orderEdit = view.findViewById(R.id.edit_text_order) as EditText
+        val orderTextInput: TextInputLayout = view.findViewById(R.id.input_layout_order)
+        val orderEdit: EditText = view.findViewById(R.id.edit_text_order)
         orderEdit.setText(flexItem.order.toString())
         orderEdit.addTextChangedListener(
                 FlexEditTextWatcher(activity, orderTextInput, IntegerInputValidator(),
@@ -106,26 +105,23 @@ internal class FlexItemEditFragment : DialogFragment() {
             orderEdit.isEnabled = false
         }
 
-        val flexGrowInput = view
-                .findViewById(R.id.input_layout_flex_grow) as TextInputLayout
-        val flexGrowEdit = view.findViewById(R.id.edit_text_flex_grow) as EditText
+        val flexGrowInput: TextInputLayout = view .findViewById(R.id.input_layout_flex_grow)
+        val flexGrowEdit: EditText = view.findViewById(R.id.edit_text_flex_grow)
         flexGrowEdit.setText(flexItem.flexGrow.toString())
         flexGrowEdit.addTextChangedListener(
                 FlexEditTextWatcher(activity, flexGrowInput, NonNegativeDecimalInputValidator(),
                         R.string.must_be_non_negative_float))
 
-        val flexShrinkInput = view
-                .findViewById(R.id.input_layout_flex_shrink) as TextInputLayout
-        val flexShrinkEdit = view.findViewById(
-                R.id.edit_text_flex_shrink) as EditText
+        val flexShrinkInput: TextInputLayout = view.findViewById(R.id.input_layout_flex_shrink)
+        val flexShrinkEdit: EditText = view.findViewById(R.id.edit_text_flex_shrink)
         flexShrinkEdit.setText(flexItem.flexShrink.toString())
         flexShrinkEdit.addTextChangedListener(
                 FlexEditTextWatcher(activity, flexShrinkInput, NonNegativeDecimalInputValidator(),
                         R.string.must_be_non_negative_float))
 
-        val flexBasisPercentInput = view.findViewById(R.id.input_layout_flex_basis_percent) as TextInputLayout
-        val flexBasisPercentEdit = view.findViewById(
-                R.id.edit_text_flex_basis_percent) as EditText
+        val flexBasisPercentInput: TextInputLayout =
+                view.findViewById(R.id.input_layout_flex_basis_percent)
+        val flexBasisPercentEdit: EditText = view.findViewById(R.id.edit_text_flex_basis_percent)
         if (flexItem.flexBasisPercent != FlexboxLayout.LayoutParams.FLEX_BASIS_PERCENT_DEFAULT) {
             flexBasisPercentEdit
                     .setText(Math.round(flexItem.flexBasisPercent * 100).toString())
@@ -136,52 +132,43 @@ internal class FlexItemEditFragment : DialogFragment() {
                 FlexEditTextWatcher(activity, flexBasisPercentInput, FlexBasisPercentInputValidator(),
                         R.string.must_be_minus_one_or_non_negative_integer))
 
-        val widthInput = view
-                .findViewById(R.id.input_layout_width) as TextInputLayout
-        val widthEdit = view.findViewById(R.id.edit_text_width) as EditText
+        val widthInput: TextInputLayout = view.findViewById(R.id.input_layout_width)
+        val widthEdit: EditText = view.findViewById(R.id.edit_text_width)
         widthEdit.setText(activity.pixelToDp(flexItem.width).toString())
         widthEdit.addTextChangedListener(
                 FlexEditTextWatcher(activity, widthInput, DimensionInputValidator(),
                         R.string.must_be_minus_one_or_minus_two_or_non_negative_integer))
 
-        val heightInput = view
-                .findViewById(R.id.input_layout_height) as TextInputLayout
-        val heightEdit = view.findViewById(
-                R.id.edit_text_height) as EditText
+        val heightInput: TextInputLayout = view.findViewById(R.id.input_layout_height)
+        val heightEdit: EditText= view.findViewById(R.id.edit_text_height)
         heightEdit.setText(activity.pixelToDp(flexItem.height).toString())
         heightEdit.addTextChangedListener(
                 FlexEditTextWatcher(activity, heightInput, DimensionInputValidator(),
                         R.string.must_be_minus_one_or_minus_two_or_non_negative_integer))
 
-        val minWidthInput = view
-                .findViewById(R.id.input_layout_min_width) as TextInputLayout
-        val minWidthEdit = view.findViewById(R.id.edit_text_min_width) as EditText
+        val minWidthInput: TextInputLayout = view.findViewById(R.id.input_layout_min_width)
+        val minWidthEdit: EditText = view.findViewById(R.id.edit_text_min_width)
         minWidthEdit.setText(activity.pixelToDp(flexItem.minWidth).toString())
         minWidthEdit.addTextChangedListener(
                 FlexEditTextWatcher(activity, minWidthInput, FixedDimensionInputValidator(),
                         R.string.must_be_non_negative_integer))
 
-        val minHeightInput = view
-                .findViewById(R.id.input_layout_min_height) as TextInputLayout
-        val minHeightEdit = view.findViewById(
-                R.id.edit_text_min_height) as EditText
+        val minHeightInput: TextInputLayout = view.findViewById(R.id.input_layout_min_height)
+        val minHeightEdit: EditText = view.findViewById(R.id.edit_text_min_height)
         minHeightEdit.setText(activity.pixelToDp(flexItem.minHeight).toString())
         minHeightEdit.addTextChangedListener(
                 FlexEditTextWatcher(activity, minHeightInput, FixedDimensionInputValidator(),
                         R.string.must_be_non_negative_integer))
 
-        val maxWidthInput = view
-                .findViewById(R.id.input_layout_max_width) as TextInputLayout
-        val maxWidthEdit = view.findViewById(R.id.edit_text_max_width) as EditText
+        val maxWidthInput: TextInputLayout = view.findViewById(R.id.input_layout_max_width)
+        val maxWidthEdit: EditText = view.findViewById(R.id.edit_text_max_width)
         maxWidthEdit.setText(activity.pixelToDp(flexItem.maxWidth).toString())
         maxWidthEdit.addTextChangedListener(
                 FlexEditTextWatcher(activity, maxWidthInput, FixedDimensionInputValidator(),
                         R.string.must_be_non_negative_integer))
 
-        val maxHeightInput = view
-                .findViewById(R.id.input_layout_max_height) as TextInputLayout
-        val maxHeightEdit = view.findViewById(
-                R.id.edit_text_max_height) as EditText
+        val maxHeightInput: TextInputLayout = view.findViewById(R.id.input_layout_max_height)
+        val maxHeightEdit: EditText = view.findViewById(R.id.edit_text_max_height)
         maxHeightEdit.setText(activity.pixelToDp(flexItem.maxHeight).toString())
         maxHeightEdit.addTextChangedListener(
                 FlexEditTextWatcher(activity, maxHeightInput, FixedDimensionInputValidator(),
@@ -190,8 +177,7 @@ internal class FlexItemEditFragment : DialogFragment() {
         setNextFocusesOnEnterDown(orderEdit, flexGrowEdit, flexShrinkEdit, flexBasisPercentEdit,
                 widthEdit, heightEdit, minWidthEdit, minHeightEdit, maxWidthEdit, maxHeightEdit)
 
-        val alignSelfSpinner = view.findViewById(
-                R.id.spinner_align_self) as Spinner
+        val alignSelfSpinner: Spinner = view.findViewById(R.id.spinner_align_self)
         val arrayAdapter = ArrayAdapter.createFromResource(activity,
                 R.array.array_align_self, R.layout.spinner_item)
         alignSelfSpinner.adapter = arrayAdapter
@@ -213,18 +199,18 @@ internal class FlexItemEditFragment : DialogFragment() {
             }
         }
 
-        val wrapBeforeCheckBox = view.findViewById(R.id.checkbox_wrap_before) as CheckBox
+        val wrapBeforeCheckBox: CheckBox = view.findViewById(R.id.checkbox_wrap_before)
         wrapBeforeCheckBox.isChecked = flexItem.isWrapBefore
         wrapBeforeCheckBox.setOnCheckedChangeListener { _, isChecked -> flexItemInEdit.isWrapBefore = isChecked }
         val alignSelfPosition = arrayAdapter
                 .getPosition(alignSelfAsString(flexItem.alignSelf))
         alignSelfSpinner.setSelection(alignSelfPosition)
 
-        view.findViewById(R.id.button_cancel).setOnClickListener {
+        view.findViewById<Button>(R.id.button_cancel).setOnClickListener {
             copyFlexItemValues(flexItem, flexItemInEdit)
             dismiss()
         }
-        val okButton = view.findViewById(R.id.button_ok) as Button
+        val okButton: Button = view.findViewById(R.id.button_ok)
         okButton.setOnClickListener(View.OnClickListener {
             if (orderTextInput.isErrorEnabled || flexGrowInput.isErrorEnabled ||
                     flexBasisPercentInput.isErrorEnabled || widthInput.isErrorEnabled ||

demo-playground/src/main/java/com/google/android/flexbox/FlexItemViewHolder.kt

@@ -27,7 +27,7 @@ import com.google.android.apps.flexbox.R
  */
 class FlexItemViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
 
-    private val textView: TextView = itemView.findViewById(R.id.textview) as TextView
+    private val textView: TextView = itemView.findViewById(R.id.textview)
 
     fun bindTo(params: RecyclerView.LayoutParams) {
         val adapterPosition = adapterPosition

demo-playground/src/main/java/com/google/android/flexbox/FlexboxLayoutFragment.kt

@@ -33,7 +33,7 @@ import java.util.*
  */
 class FlexboxLayoutFragment : Fragment() {
 
-    private lateinit var flexContainer: FlexContainer
+    private lateinit var flexContainer: FlexboxLayout
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                               savedInstanceState: Bundle?): View? {
@@ -42,7 +42,7 @@ class FlexboxLayoutFragment : Fragment() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         val activity = activity as MainActivity
-        flexContainer = view.findViewById(R.id.flexbox_layout) as FlexboxLayout
+        flexContainer = view.findViewById(R.id.flexbox_layout)
 
         val fragmentHelper = FragmentHelper(activity, flexContainer)
         fragmentHelper.initializeViews()
@@ -64,7 +64,7 @@ class FlexboxLayoutFragment : Fragment() {
             }
         }
 
-        val addFab = activity.findViewById(R.id.add_fab) as FloatingActionButton
+        val addFab: FloatingActionButton = activity.findViewById(R.id.add_fab)
         addFab.setOnClickListener {
             val viewIndex = flexContainer.flexItemCount
             // index starts from 0. New View's index is N if N views ([0, 1, 2, ... N-1])
@@ -79,8 +79,7 @@ class FlexboxLayoutFragment : Fragment() {
                     FlexItemChangedListenerImpl(flexContainer), viewIndex))
             flexContainer.addView(textView)
         }
-        val removeFab = activity.findViewById(
-                R.id.remove_fab) as FloatingActionButton
+        val removeFab: FloatingActionButton = activity.findViewById(R.id.remove_fab)
         removeFab.setOnClickListener(View.OnClickListener {
             if (flexContainer.flexItemCount == 0) {
                 return@OnClickListener

demo-playground/src/main/java/com/google/android/flexbox/FragmentHelper.kt

@@ -67,7 +67,7 @@ internal class FragmentHelper(private val activity: MainActivity, private val fl
     fun initializeViews() {
         sharedPreferences = PreferenceManager.getDefaultSharedPreferences(activity)
         initializeStringResources()
-        val navigationView = activity.findViewById(R.id.nav_view) as NavigationView
+        val navigationView: NavigationView = activity.findViewById(R.id.nav_view)
         navigationView.setNavigationItemSelectedListener(activity)
         val navigationMenu = navigationView.menu
         initializeFlexDirectionSpinner(navigationMenu)

demo-playground/src/main/java/com/google/android/flexbox/MainActivity.kt

@@ -35,18 +35,18 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        val toolbar = findViewById(R.id.toolbar) as Toolbar
+        val toolbar: Toolbar = findViewById(R.id.toolbar)
         setSupportActionBar(toolbar)
-        val drawer = findViewById(R.id.drawer_layout) as DrawerLayout
+        val drawer: DrawerLayout = findViewById(R.id.drawer_layout)
         val toggle = ActionBarDrawerToggle(
                 this, drawer, toolbar, R.string.navigation_drawer_open,
                 R.string.navigation_drawer_close)
         drawer.addDrawerListener(toggle)
         toggle.syncState()
 
-        val navigationView = findViewById(R.id.nav_view) as NavigationView
-        val radioGroup = navigationView.getHeaderView(0)
-                .findViewById(R.id.radiogroup_container_implementation) as RadioGroup
+        val navigationView: NavigationView = findViewById(R.id.nav_view)
+        val radioGroup: RadioGroup = navigationView.getHeaderView(0)
+                .findViewById(R.id.radiogroup_container_implementation)
         val fragmentManager = supportFragmentManager
 
         radioGroup.setOnCheckedChangeListener { _, checkedId ->

demo-playground/src/main/java/com/google/android/flexbox/RecyclerViewFragment.kt

@@ -41,7 +41,7 @@ internal class RecyclerViewFragment : Fragment() {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
-        val recyclerView = view.findViewById(R.id.recyclerview) as RecyclerView
+        val recyclerView: RecyclerView = view.findViewById(R.id.recyclerview)
         val activity = activity as MainActivity
         val flexboxLayoutManager = FlexboxLayoutManager(activity)
         recyclerView.layoutManager = flexboxLayoutManager
@@ -60,15 +60,15 @@ internal class RecyclerViewFragment : Fragment() {
         val fragmentHelper = FragmentHelper(activity, flexboxLayoutManager)
         fragmentHelper.initializeViews()
 
-        val addFab = activity.findViewById(R.id.add_fab) as FloatingActionButton
+        val addFab: FloatingActionButton = activity.findViewById(R.id.add_fab)
         addFab.setOnClickListener {
             val lp = FlexboxLayoutManager.LayoutParams(
                     ViewGroup.LayoutParams.WRAP_CONTENT,
                     ViewGroup.LayoutParams.WRAP_CONTENT)
             fragmentHelper.setFlexItemAttributes(lp)
             adapter.addItem(lp)
         }
-        val removeFab = activity.findViewById(R.id.remove_fab) as FloatingActionButton
+        val removeFab: FloatingActionButton = activity.findViewById(R.id.remove_fab)
         removeFab.setOnClickListener(View.OnClickListener {
             if (adapter.itemCount == 0) {
                 return@OnClickListener