切换fragment的工具类、布局及动画

1、整个工具类：

public class LoadingPage extends ConstraintLayout {

    public static final int MODE_ONLY_SHOW_LOGING = 1;
    public static final int MODE_SHOW_BUTTON_AND_TEXT = 2;


    private ProgressBar mPbLoading;

    private Button mBtnAction;

    private TextView mTvMsg;


    private OnReloadCallBack mOnReloadCallBack;






    public LoadingPage(Context context) {
        super(context);
    }

    public LoadingPage(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public LoadingPage(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }


    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();

        mPbLoading = findViewById(R.id.loading_pb_loading_view);
        mBtnAction = findViewById(R.id.loading_btn_reload);
        mTvMsg = findViewById(R.id.loading_tv_msg);


        mBtnAction.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if(mOnReloadCallBack != null){
                    mOnReloadCallBack.reload();
                    startLoading(MODE_SHOW_BUTTON_AND_TEXT);
                }

            }
        });

        startLoading();
    }


    @Override
    public boolean onTouchEvent(MotionEvent event) {
         super.onTouchEvent(event);

         return true;
    }

    public void startLoading(){
        startLoading(MODE_ONLY_SHOW_LOGING);
    }

    public void startLoading(int mode){
        if(mode == MODE_ONLY_SHOW_LOGING){
            mBtnAction.setVisibility(GONE);
            mTvMsg.setVisibility(GONE);
            mPbLoading.setVisibility(VISIBLE);
            setBackgroundColor(Color.TRANSPARENT);
        }else if(mode == MODE_SHOW_BUTTON_AND_TEXT){
            mBtnAction.setVisibility(GONE);
            mPbLoading.setVisibility(VISIBLE);
            mTvMsg.setVisibility(VISIBLE);
            mTvMsg.setText(R.string.text_loading_loading);
            setBackgroundColor(Color.WHITE);
        }
    }


    public void onError(){
        onError(getContext().getString(R.string.text_loading_error));
    }

    public void onError(String msg){
        onError(null, msg);
    }


    public void onError(OnReloadCallBack callBack,String msg){

        mTvMsg.setText(msg);
        mTvMsg.setVisibility(VISIBLE);
        mBtnAction.setVisibility(VISIBLE);
        mPbLoading.clearAnimation();
        mPbLoading.setVisibility(GONE);
        mOnReloadCallBack = callBack;

    }


    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        mPbLoading.clearAnimation();
    }


    public interface  OnReloadCallBack{

        void reload();
    }
}

2、布局文件：layout_laoding_page.xml

<?xml version="1.0" encoding="utf-8"?>
<com.jy.small.training.widget.view.LoadingPage xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ProgressBar
        android:id="@+id/loading_pb_loading_view"
        style="?android:attr/progressBarStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginBottom="8dp"
        android:visibility="visible"
        app:layout_constraintBottom_toTopOf="@+id/guideline"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <TextView
        android:id="@+id/loading_tv_msg"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:text="TextView"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/guideline" />

    <android.support.constraint.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.5" />

    <Button
        android:id="@+id/loading_btn_reload"
        android:layout_width="wrap_content"
        android:layout_height="32dp"
        android:layout_marginStart="32dp"
        android:layout_marginLeft="32dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="32dp"

        android:layout_marginRight="32dp"
        android:background="@drawable/button_yellow_round_bg_selector"
        android:text="@string/text_loading_reload"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/loading_tv_msg" />
</com.jy.small.training.widget.view.LoadingPage>

3、布局文件对应的String 字符串

<string name="text_loading_reload">重新加载</string>
    <string name="text_loading_loading">正在加载...</string>
    <string name="text_loading_error">加载失败，请重试。</string>

4、布局文件对应的color 颜色

<color name="color_a">#FFC946</color>
    <!-- 多用于按钮按下颜色-->
    <color name="color_b">#E5B53F</color>

5、四个动画文件：
（1）common_page_left_in.xml

<?xml version="1.0" encoding="utf-8"?>  
<set>
  <translate xmlns:android="http://schemas.android.com/apk/res/android"
   android:fromXDelta="-100%"
   android:toXDelta="0"
   android:interpolator="@android:anim/decelerate_interpolator"
   android:duration="500"/>
</set>

（2）common_page_left_out.xml

<?xml version="1.0" encoding="utf-8"?>  
<set>
  <translate xmlns:android="http://schemas.android.com/apk/res/android"
   android:fromXDelta="0"
   android:toXDelta="-100%"
   android:interpolator="@android:anim/decelerate_interpolator"
   android:duration="500"/>
</set>

（3）common_page_right_in.xml

<?xml version="1.0" encoding="utf-8"?>  
<set>
  <translate xmlns:android="http://schemas.android.com/apk/res/android"
   android:fromXDelta="100%"
   android:toXDelta="0"
   android:interpolator="@android:anim/decelerate_interpolator"
   android:duration="500"/>
</set>

（4）common_page_right_out.xml

<?xml version="1.0" encoding="utf-8"?>  
<set>
  <translate xmlns:android="http://schemas.android.com/apk/res/android"
   android:fromXDelta="0"
   android:toXDelta="100%"
   android:interpolator="@android:anim/decelerate_interpolator"
   android:duration="500"/>
</set>

切换fragment的工具类、布局及动画

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