修改自定义FloatingActionButton的父类，去除appcompat-v7库引用

Author: Winstonokk

dragfloatactionbuttonlibrary/build.gradle

@@ -24,11 +24,3 @@ android {
 
 }
 
-dependencies {
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
-
-    implementation 'com.android.support:appcompat-v7:28.0.0'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'com.android.support.test:runner:1.0.2'
-    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
-}

dragfloatactionbuttonlibrary/src/main/java/com/barnettwong/dragfloatactionbuttonlibrary/view/DragFloatActionButton.java

@@ -3,14 +3,14 @@
 import android.animation.ObjectAnimator;
 import android.content.Context;
 import android.os.Handler;
-import android.support.annotation.Nullable;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.ViewGroup;
 import android.view.animation.DecelerateInterpolator;
+import android.widget.ImageView;
 
-public class DragFloatActionButton extends android.support.v7.widget.AppCompatImageView {
+public class DragFloatActionButton extends ImageView {
 
     private int parentHeight;
     private int parentWidth;
@@ -35,15 +35,14 @@ public DragFloatActionButton(Context context) {
         super(context);
     }
 
-    public DragFloatActionButton(Context context, @Nullable AttributeSet attrs) {
+    public DragFloatActionButton(Context context,  AttributeSet attrs) {
         super(context, attrs);
     }
 
-    public DragFloatActionButton(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+    public DragFloatActionButton(Context context,  AttributeSet attrs, int defStyleAttr) {
         super(context, attrs, defStyleAttr);
     }
 
-
     @Override
     public boolean onTouchEvent(MotionEvent event) {
         int rawX = (int) event.getRawX();