Andorid开发，support 迁移androidx，或an

*******************************/implementation：关于androidx和support库的迁移对比(上：androidx引入，下：support引入) *******************************/\

implementation 'androidx.legacy:legacy-support-v4:1.0.0'

implementation 'com.android.support:support-v4:28.0.0'

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implementation 'androidx.appcompat:appcompat:1.0.0'

implementation 'com.android.support:appcompat-v7:28.0.0'

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implementation 'androidx.annotation:annotation:1.0.0'

implementation 'com.android.support:support-annotations:28.0.0'

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implementation 'androidx.recyclerview:recyclerview:1.0.0'

implementation 'com.android.support:recyclerview-v7:28.0.0'

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implementation 'androidx.constraintlayout:constraintlayout:1.1.3'

implementation 'com.android.support.constraint:constraint-layout:2.0.4'

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com.airbnb.android:lottie:3.4.2

com.airbnb.android:lottie:2.7.0

---------------------------------------import end-------------------------------------------

*******************************/import：关于androidx和support库的迁移对比(上：androidx 库导入，下：support 库导入) *******************************/

import com.google.android.material.bottomsheet.BottomSheetDialog;

import android.support.design.widget.BottomSheetDialog;

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import androidx.recyclerview.widget.LinearLayoutManager;

import android.support.v7.widget.LinearLayoutManager;

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import androidx.recyclerview.widget.RecyclerView;

import android.support.v7.widget.RecyclerView;

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import androidx.constraintlayout.widget.Group;

import android.support.constraint.Group;

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import androidx.recyclerview.widget.DividerItemDecoration;

import android.support.v7.widget.DividerItemDecoration;

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import androidx.constraintlayout.widget.ConstraintLayout;

import android.support.constraint.ConstraintLayout;

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import androidx.recyclerview.widget.DefaultItemAnimator;

import android.support.v7.widget.DefaultItemAnimator;

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import androidx.recyclerview.widget.GridLayoutManager;

import android.support.v7.widget.GridLayoutManager;

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import androidx.constraintlayout.widget.ConstraintSet;

import android.support.constraint.ConstraintSet;

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import androidx.appcompat.app.AppCompatActivity;

import android.support.v7.app.AppCompatActivity;

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import androidx.annotation.Nullable;

import android.support.annotation.Nullable;

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import androidx.annotation.ColorRes;

import android.support.annotation.ColorRes;

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import androidx.annotation.NonNull;

import android.support.annotation.NonNull;

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import androidx.annotation.ColorInt;

import android.support.annotation.ColorInt;

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import androidx.annotation.ColorRes;

import android.support.annotation.ColorRes;

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import androidx.annotation.DrawableRes;

import android.support.annotation.DrawableRes;

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import androidx.annotation.RequiresApi;

import android.support.annotation.RequiresApi;

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import androidx.core.os.ParcelableCompat;

import android.support.v4.os.ParcelableCompat;

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import androidx.core.os.ParcelableCompatCreatorCallbacks;

import android.support.v4.os.ParcelableCompatCreatorCallbacks;

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import androidx.core.view.AccessibilityDelegateCompat;

import android.support.v4.view.AccessibilityDelegateCompat;

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import androidx.core.view.MotionEventCompat;

import android.support.v4.view.MotionEventCompat;

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import androidx.core.view.VelocityTrackerCompat;

import android.support.v4.view.VelocityTrackerCompat;

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import androidx.core.view.ViewCompat;

import android.support.v4.view.ViewCompat;

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import androidx.core.view.ViewConfigurationCompat;

import android.support.v4.view.ViewConfigurationCompat;

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import androidx.core.view.accessibility.AccessibilityEventCompat;

import android.support.v4.view.accessibility.AccessibilityEventCompat;

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import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;

import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;

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import androidx.core.view.accessibility.AccessibilityRecordCompat;

import android.support.v4.view.accessibility.AccessibilityRecordCompat;

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import androidx.core.widget.EdgeEffectCompat;

import android.support.v4.widget.EdgeEffectCompat;

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import androidx.viewpager.widget.PagerAdapter;

import android.support.v4.view.PagerAdapter;

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import androidx.viewpager.widget.ViewPager;

import android.support.v4.view.ViewPager;

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import androidx.fragment.app.Fragment;

import android.support.v4.app.Fragment;

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import androidx.fragment.app.FragmentTransaction;

import android.support.v4.app.FragmentTransaction;

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import androidx.multidex.MultiDex;

import android.support.multidex.MultiDex;

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import androidx.appcompat.widget.AppCompatImageView;

import android.support.v7.widget.AppCompatImageView;

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import androidx.viewpager.widget.PagerAdapter;

import android.support.v4.view.PagerAdapter;

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import androidx.localbroadcastmanager.content.LocalBroadcastManager;

import android.support.v4.content.LocalBroadcastManager;

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import androidx.fragment.app.DialogFragment;

import android.support.v4.app.DialogFragment;

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import androidx.appcompat.app.AlertDialog;

import android.support.v7.app.AlertDialog;

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import androidx.core.app.ActivityCompat;

import android.support.v4.app.ActivityCompat;

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import androidx.core.content.ContextCompat;

import android.support.v4.content.ContextCompat;

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import androidx.annotation.RawRes;

import android.support.annotation.RawRes;

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import androidx.fragment.app.FragmentManager;

import android.support.v4.app.FragmentManager;

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import androidx.fragment.app.FragmentPagerAdapter;

import android.support.v4.app.FragmentPagerAdapter;

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import com.google.android.material.tabs.TabLayout;

import android.support.design.widget.TabLayout;

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import androidx.annotation.StringRes;

import android.support.annotation.StringRes;

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import androidx.appcompat.widget.AppCompatTextView;

import android.support.v7.widget.AppCompatTextView;

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import androidx.appcompat.widget.Toolbar;

import android.support.v7.widget.Toolbar;

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import androidx.annotation.IntRange;

import android.support.annotation.IntRange;

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import androidx.core.content.FileProvider;

import android.support.v4.content.FileProvider;

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import androidx.appcompat.view.ContextThemeWrapper;

import android.support.v7.view.ContextThemeWrapper;

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import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;

import android.support.v4.widget.SwipeRefreshLayout;

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import com.google.android.gms.common.ConnectionResult;

import com.huawei.hms.api.ConnectionResult;

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---------------------------------------import end-------------------------------------------

*******************************/xml：关于androidx和support库的迁移对比(上：androidx 使用，下：support 使用) *******************************/

androidx.constraintlayout.widget.ConstraintLayout

android.support.constraint.ConstraintLayout

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androidx.recyclerview.widget.RecyclerView

android.support.v7.widget.RecyclerView

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androidx.appcompat.widget.Toolbar

android.support.v7.widget.Toolbar

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androidx.viewpager.widget.ViewPager

android.support.v4.view.ViewPager

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androidx.constraintlayout.widget.Toolbar

android.support.v7.widget.Toolbar

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androidx.constraintlayout.widget.Guideline

android.support.constraint.Guideline

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androidx.constraintlayout.widget.Group

android.support.constraint.Group

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androidx.swiperefreshlayout.widget.SwipeRefreshLayout

android.support.v4.widget.SwipeRefreshLayout

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androidx.appcompat.widget.SwitchCompat

android.support.v7.widget.SwitchCompat

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androidx.appcompat.widget.AppCompatImageButton

android.support.v7.widget.AppCompatImageButton

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---------------------------------------xml end-------------------------------------------