More cleanups

- Use support libs to render vector animated lists pre 21
- Remove radio buttons as it uses pngs
- Remove unused resources

app/build.gradle

@@ -5,6 +5,7 @@ android {
 
     defaultConfig {
         applicationId "com.buildware.widget.sample"
+        buildToolsVersion rootProject.ext.buildToolsVersion
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
         versionCode 1

app/src/main/java/com/buildware/widget/sample/MainActivity.java

@@ -3,15 +3,11 @@ package com.buildware.widget.sample;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.CheckBox;
-import android.widget.CompoundButton;
-import android.widget.Toast;
 
-import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.AppCompatCheckBox;
 
 import com.topjohnwu.widget.IndeterminateCheckBox;
-import com.topjohnwu.widget.IndeterminateRadioButton;
 
 public class MainActivity extends AppCompatActivity {
 
@@ -23,45 +19,11 @@ public class MainActivity extends AppCompatActivity {
         final CheckBox checkBox = findViewById(R.id.checkBox);
         final AppCompatCheckBox appCompatCheckBox = findViewById(R.id.app_compat_checkbox);
         final IndeterminateCheckBox indetermCheckBox = findViewById(R.id.indeterm_checkbox);
-        final IndeterminateRadioButton radio = findViewById(R.id.indeterm_radio);
-
-        checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
-            @Override
-            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
-                String stateText = isChecked ? "Checked" : "Unchecked";
-                Toast.makeText(MainActivity.this, "Standard CheckBox: " + stateText, Toast.LENGTH_SHORT).show();
-            }
-        });
-
-        appCompatCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
-            @Override
-            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
-                String stateText = isChecked ? "Checked" : "Unchecked";
-                Toast.makeText(MainActivity.this, "AppCompat CheckBox: " + stateText, Toast.LENGTH_SHORT).show();
-            }
-        });
-
-        indetermCheckBox.setOnStateChangedListener(new IndeterminateCheckBox.OnStateChangedListener() {
-            @Override
-            public void onStateChanged(IndeterminateCheckBox check, @Nullable Boolean state) {
-                String stateText = (state != null) ? (state ? "Checked" : "Unchecked") : "Indeterminate";
-                Toast.makeText(MainActivity.this, "IndeterminateCheckBox: " + stateText, Toast.LENGTH_SHORT).show();
-            }
-        });
-
-        radio.setOnStateChangedListener(new IndeterminateRadioButton.OnStateChangedListener() {
-            @Override
-            public void onStateChanged(IndeterminateRadioButton radioButton, @Nullable Boolean state) {
-                String stateText = (state != null) ? (state ? "Checked" : "Unchecked") : "Indeterminate";
-                Toast.makeText(MainActivity.this, "IndeterminateRadioButton: " + stateText, Toast.LENGTH_SHORT).show();
-            }
-        });
 
         findViewById(R.id.btn_indeterminate).setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 indetermCheckBox.setState(null);
-                radio.setState(null);
             }
         });
 
@@ -71,7 +33,6 @@ public class MainActivity extends AppCompatActivity {
                 checkBox.setChecked(true);
                 appCompatCheckBox.setChecked(true);
                 indetermCheckBox.setChecked(true);
-                radio.setChecked(true);
             }
         });
 
@@ -81,7 +42,6 @@ public class MainActivity extends AppCompatActivity {
                 checkBox.setChecked(false);
                 appCompatCheckBox.setChecked(false);
                 indetermCheckBox.setChecked(false);
-                radio.setChecked(false);
             }
         });
 
@@ -91,7 +51,6 @@ public class MainActivity extends AppCompatActivity {
                 checkBox.setEnabled(true);
                 appCompatCheckBox.setEnabled(true);
                 indetermCheckBox.setEnabled(true);
-                radio.setEnabled(true);
             }
         });
 
@@ -101,7 +60,6 @@ public class MainActivity extends AppCompatActivity {
                 checkBox.setEnabled(false);
                 appCompatCheckBox.setEnabled(false);
                 indetermCheckBox.setEnabled(false);
-                radio.setEnabled(false);
             }
         });
     }

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

@@ -82,13 +82,5 @@
             android:text="IndeterminateCheckBox"
             app:indeterminate="true"/>
 
-        <com.topjohnwu.widget.IndeterminateRadioButton
-            android:id="@+id/indeterm_radio"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="IndeterminateRadioButton"
-            app:indeterminate="true"
-            android:gravity="center_vertical"/>
-
     </LinearLayout>
 </ScrollView>

build.gradle

@@ -22,6 +22,7 @@ ext {
     compileSdkVersion = 30
     targetSdkVersion = 30
     minSdkVersion = 14
+    buildToolsVersion = "30.0.1"
 }
 
 task clean(type: Delete) {

library/build.gradle

@@ -7,17 +7,24 @@ android {
     compileSdkVersion rootProject.ext.compileSdkVersion
 
     defaultConfig {
+        buildToolsVersion rootProject.ext.buildToolsVersion
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
         versionCode 1
         versionName "1.0.6"
+        vectorDrawables.useSupportLibrary = true
     }
+
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+
+    buildFeatures {
+        buildConfig false
+    }
 }
 
 task sourcesJar(type: Jar) {

library/src/main/java/com/topjohnwu/widget/IndeterminateCheckBox.java

@@ -1,21 +1,26 @@
 package com.topjohnwu.widget;
 
 import android.content.Context;
+import android.content.res.ColorStateList;
 import android.content.res.TypedArray;
 import android.os.Parcelable;
 import android.util.AttributeSet;
+import android.util.StateSet;
 import android.view.ViewDebug;
 
+import androidx.annotation.DrawableRes;
 import androidx.annotation.Nullable;
+import androidx.core.widget.CompoundButtonCompat;
 
 import com.google.android.material.checkbox.MaterialCheckBox;
+import com.google.android.material.color.MaterialColors;
 
 /**
  * A CheckBox with additional 3rd "indeterminate" state.
  * By default it is in "determinate" (checked or unchecked) state.
  * @author Svetlozar Kostadinov (sevarbg@gmail.com)
  */
-public class IndeterminateCheckBox extends MaterialCheckBox implements IndeterminateCheckable {
+public class IndeterminateCheckBox extends MaterialCheckBox {
 
     private static final int[] INDETERMINATE_STATE_SET = {
             R.attr.state_indeterminate
@@ -51,12 +56,12 @@ public class IndeterminateCheckBox extends MaterialCheckBox implements Indetermi
 
     public IndeterminateCheckBox(Context context, AttributeSet attrs, int defStyleAttr) {
         super(context, attrs, defStyleAttr);
-        Utils.setButtonDrawable(this, R.drawable.btn_checkmark);
-        final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.IndeterminateCheckable);
+        setButtonDrawable(R.drawable.btn_checkmark);
+        final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.IndeterminateCheckBox);
         try {
             // Read the XML attributes
             final boolean indeterminate = a.getBoolean(
-                    R.styleable.IndeterminateCheckable_indeterminate, false);
+                    R.styleable.IndeterminateCheckBox_indeterminate, false);
             if (indeterminate) {
                 setIndeterminate(true);
             }
@@ -105,14 +110,12 @@ public class IndeterminateCheckBox extends MaterialCheckBox implements Indetermi
         }
     }
 
-    @Override
     @Nullable
     @ViewDebug.ExportedProperty
     public Boolean getState() {
         return mIndeterminate ? null : isChecked();
     }
 
-    @Override
     public void setState(@Nullable Boolean state) {
         if (state != null) {
             setChecked(state);
@@ -185,4 +188,38 @@ public class IndeterminateCheckBox extends MaterialCheckBox implements Indetermi
             notifyStateListener();
         }
     }
+
+    @Override
+    public void setButtonDrawable(@DrawableRes int drawable) {
+        super.setButtonDrawable(drawable);
+        CompoundButtonCompat.setButtonTintList(this, createIndeterminateColorStateList());
+    }
+
+    private ColorStateList createIndeterminateColorStateList() {
+        final int[][] states = new int[][]{
+            new int[]{-android.R.attr.state_enabled},
+            new int[]{R.attr.state_indeterminate},
+            new int[]{android.R.attr.state_checked},
+            StateSet.WILD_CARD
+        };
+
+        int colorControlActivated = MaterialColors.getColor(this, R.attr.colorControlActivated);
+        int colorIndeterminate = MaterialColors.getColor(this, R.attr.colorControlIndeterminate, colorControlActivated);
+        int colorSurface = MaterialColors.getColor(this, R.attr.colorSurface);
+        int colorOnSurface = MaterialColors.getColor(this, R.attr.colorOnSurface);
+
+        int checked = MaterialColors.layer(colorSurface, colorControlActivated, MaterialColors.ALPHA_FULL);
+        int indeterminate = MaterialColors.layer(colorSurface, colorIndeterminate, MaterialColors.ALPHA_FULL);
+        int unchecked = MaterialColors.layer(colorSurface, colorOnSurface, MaterialColors.ALPHA_MEDIUM);
+        int disabled = MaterialColors.layer(colorSurface, colorOnSurface, MaterialColors.ALPHA_DISABLED);
+
+        final int[] colors = new int[]{
+            disabled,
+            indeterminate,
+            checked,
+            unchecked
+        };
+
+        return new ColorStateList(states, colors);
+    }
 }

library/src/main/java/com/topjohnwu/widget/IndeterminateCheckable.java

@@ -1,20 +0,0 @@
-package com.topjohnwu.widget;
-
-import android.widget.Checkable;
-
-import androidx.annotation.Nullable;
-
-/**
- * Extension to Checkable interface with addition "indeterminate" state
- * represented by <code>getState()</code>. Value meanings:
- *   null = indeterminate state
- *   true = checked state
- *   false = unchecked state
- */
-public interface IndeterminateCheckable extends Checkable {
-
-    void setState(@Nullable Boolean state);
-
-    @Nullable
-    Boolean getState();
-}

library/src/main/java/com/topjohnwu/widget/IndeterminateRadioButton.java

@@ -1,192 +0,0 @@
-package com.topjohnwu.widget;
-
-import android.content.Context;
-import android.content.res.TypedArray;
-import android.os.Parcelable;
-import android.util.AttributeSet;
-import android.view.ViewDebug;
-
-import androidx.annotation.Nullable;
-
-import com.google.android.material.radiobutton.MaterialRadioButton;
-
-/**
- * A RadioButton with additional 3rd "indeterminate" state.
- * By default it is in "determinate" (checked or unchecked) state.
- * @author Svetlozar Kostadinov (sevarbg@gmail.com)
- */
-public class IndeterminateRadioButton extends MaterialRadioButton
-        implements IndeterminateCheckable {
-
-    private static final int[] INDETERMINATE_STATE_SET = {
-            R.attr.state_indeterminate
-    };
-
-    private boolean mIndeterminate;
-    private boolean mBroadcasting;
-    private OnStateChangedListener mOnStateChangedListener;
-
-    /**
-     * Interface definition for a callback to be invoked when the checked state changed.
-     */
-    public interface OnStateChangedListener {
-        /**
-         * Called when the indeterminate state has changed.
-         *
-         * @param radioButton The RadioButton whose state has changed.
-         * @param state The state of buttonView. Value meanings:
-         *              null = indeterminate state
-         *              true = checked state
-         *              false = unchecked state
-         */
-        void onStateChanged(IndeterminateRadioButton radioButton, @Nullable Boolean state);
-    }
-
-    public IndeterminateRadioButton(Context context) {
-        this(context, null);
-    }
-
-    public IndeterminateRadioButton(Context context, AttributeSet attrs) {
-        this(context, attrs, android.R.attr.radioButtonStyle);
-    }
-
-    public IndeterminateRadioButton(Context context, AttributeSet attrs, int defStyleAttr) {
-        super(context, attrs, defStyleAttr);
-
-        Utils.setButtonDrawable(this, R.drawable.btn_radio);
-
-        final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.IndeterminateCheckable);
-        try {
-            // Read the XML attributes
-            final boolean indeterminate = a.getBoolean(
-                    R.styleable.IndeterminateCheckable_indeterminate, false);
-            if (indeterminate) {
-                setState(null);
-            }
-        } finally {
-            a.recycle();
-        }
-    }
-
-    @Override
-    public void toggle() {
-        if (mIndeterminate) {
-            setChecked(true);
-        } else {
-            super.toggle();
-        }
-    }
-
-    public void setChecked(boolean checked) {
-        final boolean checkedChanged = isChecked() != checked;
-        super.setChecked(checked);
-        final boolean wasIndeterminate = isIndeterminate();
-        setIndeterminateImpl(false, false);
-        if (wasIndeterminate || checkedChanged) {
-            notifyStateListener();
-        }
-    }
-
-    @ViewDebug.ExportedProperty
-    public boolean isIndeterminate() {
-        return mIndeterminate;
-    }
-
-    public void setIndeterminate(boolean indeterminate) {
-        setIndeterminateImpl(indeterminate, true);
-    }
-
-    private void setIndeterminateImpl(boolean indeterminate, boolean notify) {
-        if (mIndeterminate != indeterminate) {
-            mIndeterminate = indeterminate;
-            refreshDrawableState();
-            if (notify) {
-                /*notifyViewAccessibilityStateChangedIfNeeded(
-                        AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); */
-                notifyStateListener();
-            }
-        }
-    }
-
-
-    @Override
-    @Nullable
-    @ViewDebug.ExportedProperty
-    public Boolean getState() {
-        return mIndeterminate ? null : isChecked();
-    }
-
-    @Override
-    public void setState(@Nullable Boolean state) {
-        if (state != null) {
-            setChecked(state);
-        } else {
-            setIndeterminate(true);
-        }
-    }
-
-    /**
-     * Register a callback to be invoked when the indeterminate or checked state changes.
-     * The standard <code>OnCheckedChangedListener</code> will still be called prior to
-     * OnStateChangedListener.
-     *
-     * @param listener the callback to call on indeterminate or checked state change
-     */
-    public void setOnStateChangedListener(OnStateChangedListener listener) {
-        mOnStateChangedListener = listener;
-    }
-
-    @Override
-    public CharSequence getAccessibilityClassName() {
-        return IndeterminateRadioButton.class.getName();
-    }
-
-    private void notifyStateListener() {
-        // Avoid infinite recursions if state is changed from a listener
-        if (mBroadcasting) {
-            return;
-        }
-
-        mBroadcasting = true;
-        if (mOnStateChangedListener != null) {
-            mOnStateChangedListener.onStateChanged(this, getState());
-        }
-        mBroadcasting = false;
-    }
-
-    @Override
-    protected int[] onCreateDrawableState(int extraSpace) {
-        final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
-        if (getState() == null) {
-            mergeDrawableStates(drawableState, INDETERMINATE_STATE_SET);
-        }
-        return drawableState;
-    }
-
-    @Override
-    public Parcelable onSaveInstanceState() {
-        Parcelable superState = super.onSaveInstanceState();
-        IndeterminateSavedState ss = new IndeterminateSavedState(superState);
-        ss.indeterminate = mIndeterminate;
-
-        return ss;
-    }
-
-    @Override
-    public void onRestoreInstanceState(Parcelable state) {
-        IndeterminateSavedState ss = (IndeterminateSavedState) state;
-
-        // This temporarily disallows our callback notification, we will call it below if needed
-        mBroadcasting = true;
-        super.onRestoreInstanceState(ss.getSuperState());
-        mBroadcasting = false;
-
-        mIndeterminate = ss.indeterminate;
-        // Both "indeterminate" and "checked" state are considered "excited" states. "Excited" state
-        // is state that is different from the default "unchecked". On view restoration CompoundButton
-        // notifies for change if the restored state is non-default. So, we will do the same for our merged state.
-        if (mIndeterminate || isChecked()) {
-            notifyStateListener();
-        }
-    }
-}

library/src/main/java/com/topjohnwu/widget/IndeterminateSavedState.java

@@ -10,9 +10,6 @@ import android.view.View;
 class IndeterminateSavedState extends View.BaseSavedState {
     boolean indeterminate;
 
-    /**
-     * Constructor called from {@link IndeterminateRadioButton#onSaveInstanceState()}
-     */
     IndeterminateSavedState(Parcelable superState) {
         super(superState);
     }

library/src/main/java/com/topjohnwu/widget/Utils.java

@@ -1,51 +0,0 @@
-package com.topjohnwu.widget;
-
-import android.content.res.ColorStateList;
-import android.util.StateSet;
-import android.view.View;
-import android.widget.CompoundButton;
-
-import androidx.annotation.DrawableRes;
-import androidx.core.widget.CompoundButtonCompat;
-
-import com.google.android.material.color.MaterialColors;
-
-class Utils {
-
-    public static void setButtonDrawable(CompoundButton view, @DrawableRes int drawable) {
-        if (!(view instanceof IndeterminateCheckable)) {
-            throw new IllegalArgumentException("view must implement IndeterminateCheckable");
-        }
-        view.setButtonDrawable(drawable);
-        CompoundButtonCompat.setButtonTintList(view, createIndeterminateColorStateList(view));
-    }
-
-    private static ColorStateList createIndeterminateColorStateList(View view) {
-
-        final int[][] states = new int[][]{
-                new int[]{-android.R.attr.state_enabled},
-                new int[]{R.attr.state_indeterminate},
-                new int[]{android.R.attr.state_checked},
-                StateSet.WILD_CARD
-        };
-
-        int colorControlActivated = MaterialColors.getColor(view, R.attr.colorControlActivated);
-        int colorIndeterminate = MaterialColors.getColor(view, R.attr.colorControlIndeterminate, colorControlActivated);
-        int colorSurface = MaterialColors.getColor(view, R.attr.colorSurface);
-        int colorOnSurface = MaterialColors.getColor(view, R.attr.colorOnSurface);
-
-        int checked = MaterialColors.layer(colorSurface, colorControlActivated, MaterialColors.ALPHA_FULL);
-        int indeterminate = MaterialColors.layer(colorSurface, colorIndeterminate, MaterialColors.ALPHA_FULL);
-        int unchecked = MaterialColors.layer(colorSurface, colorOnSurface, MaterialColors.ALPHA_MEDIUM);
-        int disabled = MaterialColors.layer(colorSurface, colorOnSurface, MaterialColors.ALPHA_DISABLED);
-
-        final int[] colors = new int[]{
-                disabled,
-                indeterminate,
-                checked,
-                unchecked
-        };
-
-        return new ColorStateList(states, colors);
-    }
-}

library/src/main/res/drawable-v21/btn_checkmark.xml

@@ -1,55 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2015 The Android Open Source Project
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-          http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-<animated-selector xmlns:android="http://schemas.android.com/apk/res/android"
-                   xmlns:app="http://schemas.android.com/apk/res-auto">
-
-    <!-- The original name was btn_check_material_anim.xml -->
-    <item
-        android:id="@+id/indeterminate"
-        app:state_indeterminate="true"
-        android:drawable="@drawable/ic_checkbox_indeterminate" />
-    <item
-        android:id="@+id/checked"
-        android:state_checked="true"
-        android:drawable="@drawable/ic_checkbox_checked" />
-    <item
-        android:id="@+id/unchecked"
-        android:drawable="@drawable/ic_checkbox_unchecked" />
-    <transition
-        android:fromId="@+id/unchecked"
-        android:toId="@+id/checked"
-        android:drawable="@drawable/ic_checkbox_unchecked_to_checked_animation" />
-    <transition
-        android:fromId="@+id/checked"
-        android:toId="@+id/unchecked"
-        android:drawable="@drawable/ic_checkbox_checked_to_unchecked_animation" />
-    <transition
-        android:fromId="@+id/indeterminate"
-        android:toId="@+id/checked"
-        android:drawable="@drawable/ic_checkbox_indeterminate_to_checked_animation" />
-    <transition
-        android:fromId="@+id/checked"
-        android:toId="@+id/indeterminate"
-        android:drawable="@drawable/ic_checkbox_checked_to_indeterminate_animation" />
-    <transition
-        android:fromId="@+id/unchecked"
-        android:toId="@+id/indeterminate"
-        android:drawable="@drawable/ic_checkbox_unchecked_to_indeterminate_animation" />
-    <transition
-        android:fromId="@+id/indeterminate"
-        android:toId="@+id/unchecked"
-        android:drawable="@drawable/ic_checkbox_indeterminate_to_unchecked_animation" />
-</animated-selector>

library/src/main/res/drawable/btn_checkmark.xml

@@ -13,7 +13,7 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-<selector xmlns:android="http://schemas.android.com/apk/res/android"
+<animated-selector xmlns:android="http://schemas.android.com/apk/res/android"
                    xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <!-- The original name was btn_check_material_anim.xml -->
@@ -28,4 +28,28 @@
     <item
         android:id="@+id/unchecked"
         android:drawable="@drawable/ic_checkbox_unchecked" />
-</selector>
+    <transition
+        android:fromId="@+id/unchecked"
+        android:toId="@+id/checked"
+        android:drawable="@drawable/ic_checkbox_unchecked_to_checked_animation" />
+    <transition
+        android:fromId="@+id/checked"
+        android:toId="@+id/unchecked"
+        android:drawable="@drawable/ic_checkbox_checked_to_unchecked_animation" />
+    <transition
+        android:fromId="@+id/indeterminate"
+        android:toId="@+id/checked"
+        android:drawable="@drawable/ic_checkbox_indeterminate_to_checked_animation" />
+    <transition
+        android:fromId="@+id/checked"
+        android:toId="@+id/indeterminate"
+        android:drawable="@drawable/ic_checkbox_checked_to_indeterminate_animation" />
+    <transition
+        android:fromId="@+id/unchecked"
+        android:toId="@+id/indeterminate"
+        android:drawable="@drawable/ic_checkbox_unchecked_to_indeterminate_animation" />
+    <transition
+        android:fromId="@+id/indeterminate"
+        android:toId="@+id/unchecked"
+        android:drawable="@drawable/ic_checkbox_indeterminate_to_unchecked_animation" />
+</animated-selector>

library/src/main/res/drawable/btn_radio.xml

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<selector xmlns:android="http://schemas.android.com/apk/res/android"
-          xmlns:app="http://schemas.android.com/apk/res-auto"
-          android:constantSize="true">
-
-    <item app:state_indeterminate="true" android:drawable="@drawable/ic_radio_indeterminate" />
-    <item android:state_checked="true" android:drawable="@drawable/btn_radio_to_off_mtrl_000" />
-    <item android:drawable="@drawable/btn_radio_to_on_mtrl_000" />
-</selector>

library/src/main/res/values/attrs.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <declare-styleable name="IndeterminateCheckable">
+    <declare-styleable name="IndeterminateCheckBox">
         <!-- Additional drawable state. It is merged into the parent CompoundButton states -->
         <attr name="state_indeterminate" format="boolean" />
         <!-- Indeterminate state attribute for the view -->

library/src/main/res/values/strings.xml

@@ -1,3 +0,0 @@
-<resources>
-    <string name="app_name">Indeterminate CheckBox and RadioButton Library</string>
-</resources>

library/src/main/res/values/values.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <item format="float" name="disabledAlpha" type="dimen">0.30</item>
-</resources>