### Initial Android UI Layout for Guide View

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

Partial XML layout defining `ImageView` and `LinearLayout` elements, setting up the basic structure for the guide view with various image assets and sizing properties.

```XML
            android:src="@drawable/row8" />

        <ImageView
            android:layout_width="600dp"
            android:layout_height="72dp"
            android:scaleType="centerCrop"
            android:src="@drawable/row9" />
    </LinearLayout>
    <ImageView
        android:id="@+id/iv_device"
        android:layout_width="340dp"
        android:layout_height="500dp"
        android:layout_centerInParent="true"
        android:scaleType="centerInside"
        android:src="@drawable/tour_device" />


    <ImageView
        android:id="@+id/iv_initial_phone"
        android:layout_width="200dp"
        android:layout_height="400dp"
        android:layout_centerInParent="true"
        android:scaleType="centerCrop"
        android:src="@drawable/tour_initial_photo" />

    <ImageView
        android:id="@+id/iv_final_photo"
        android:layout_width="48dp"
        android:layout_height="72dp"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="144dp"
        android:scaleType="centerCrop"
        android:src="@drawable/tour_final_photo" />


    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></android.support.v4.view.ViewPager>


</RelativeLayout>
```

--------------------------------

### Android XML Layout for Guide View with Blurring and ViewPager

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

This XML layout defines the main screen structure for an Android guide view. It incorporates a custom 'BlurringView' for background effects, a 'ViewPager' to display multiple guide fragments, and a 'TextView' for user interaction (e.g., 'Register'). Elements are positioned using 'RelativeLayout' properties.

```XML
        android:layout_alignParentBottom="true"
        app:blurRadius="11"
        app:downsampleFactor="6"
        app:overlayColor="#99FFFFFF"
        >

    </hanks.com.guideview.BlurringView>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        ></android.support.v4.view.ViewPager>


    <TextView
        android:id="@+id/tv_register"
        android:layout_width="80dp"
        android:layout_height="25dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="15dp"
        android:background="#2595ec"
        android:gravity="center"
        android:text="注册"
        android:textColor="#fff"
        android:textSize="12sp" />

</RelativeLayout>
```

--------------------------------

### Android MainActivity for Guide View with ViewPager and Blurring

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

This Java code defines the 'MainActivity' for an Android guide view application. It initializes a 'ViewPager' with multiple 'GuideFragment' instances, sets up a custom 'BlurringView' to apply a blur effect to a specified view, and configures a 'PageTransformer' for custom page transitions. It also handles full-screen display and manages UI elements like 'ImageView' and 'TextView'.

```Java
package hanks.com.guideview;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

/**
 * by Hanks
 */
public class MainActivity extends FragmentActivity {

    private ViewPager viewpager;
    private ImageView iv_device, iv_initial_phone;
    private ImageView iv_final_photo;
    private List<Fragment> fragmentList = new ArrayList<>();
    private LinearLayout ll_rows, ll_comments;
    private float currentPosition = 0;
    private GuideFragment fragment00, fragment01, fragment02, fragment03;
    private TextView tv_avatar_you;
    private TextView tv_register;

    private BlurringView blurringView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);//去掉信息栏
        setContentView(R.layout.activity_main);
        setFullscreen();

        fragment00 = new GuideFragment();
        fragment01 = new GuideFragment();
        fragment02 = new GuideFragment();
        fragment03 = new GuideFragment();

        fragmentList.add(fragment00);
        fragmentList.add(fragment01);
        fragmentList.add(fragment02);
        fragmentList.add(fragment03);


        viewpager = (ViewPager) findViewById(R.id.viewpager);
        iv_device = (ImageView) findViewById(R.id.iv_device);
        iv_final_photo = (ImageView) findViewById(R.id.iv_final_photo);
        tv_avatar_you = (TextView) findViewById(R.id.tv_avatar_you);
        tv_register = (TextView) findViewById(R.id.tv_register);

        blurringView = (BlurringView) findViewById(R.id.blurringView);

        ll_rows = (LinearLayout) findViewById(R.id.ll_rows);
        ll_comments = (LinearLayout) findViewById(R.id.ll_comments);

        iv_initial_phone = (ImageView) findViewById(R.id.iv_initial_phone);

        View blurredView = findViewById(R.id.blurredView);
        blurringView.setBlurredView(blurredView);

        //创建adapter
        GuideAdapter adapter = new GuideAdapter(getSupportFragmentManager());
        //设置viewpager缓存页数,默认的缓存一页,因为引导页共有4页,
        //所以设置缓存3页,这样所以page在滑动过程中不会重新创建
        viewpager.setOffscreenPageLimit(3);
        viewpager.setAdapter(adapter);
        viewpager.setPageTransformer(true, new HKTransformer());
    }

    private void setFullscreen() {
        View decorView = getWindow().getDecorView();
        int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
        decorView.setSystemUiVisibility(uiOptions);
    }

    class GuideAdapter extends FragmentPagerAdapter {
        public GuideAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            return fragmentList.get(position);
        }

        @Override
        public int getCount() {
            return fragmentList.size();
        }
    }


    /**
     * by Hanks
     */
    class HKTransformer implements ViewPager.PageTransformer {
        @Override
        public void transformPage(View view, float position) {
            if (fragment00.getView() == view) {
                Log.i("", "view:    " + view + "position= " + position);
                currentPosition = position;
            }

            blurringView.invalidate();

            if (position < -1) { // [-Infinity,-1)
                // This page is way off-screen to the left.
            } else if (position <= 0) { // [-1,0]

```

--------------------------------

### Android Final Layout for Blurring Effect Integration

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

The final XML layout demonstrating the integration of `BlurringView` with a `RelativeLayout` containing other UI elements. The `blurredView` ID is assigned to the `RelativeLayout` that will serve as the source for the blurring effect, showcasing a typical setup for applying blur to a section of the UI.

```XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="#fff"
    android:orientation="vertical">

    <RelativeLayout
        android:id="@+id/blurredView"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:id="@+id/ll_comments"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:orientation="vertical">

            <TextView
                android:layout_width="200dp"
                android:layout_height="63dp"
                android:layout_gravity="right"
                android:drawableLeft="@drawable/tour_avatar1"
                android:drawablePadding="8dp"
                android:gravity="center_vertical|left"
                android:text="Kaitlyn 收藏了\n您的照片\n刚刚"
                android:textColor="#111"
                android:textSize="14sp" />

            <TextView
                android:layout_width="200dp"
                android:layout_height="63dp"
                android:layout_gravity="left"
                android:drawablePadding="8dp"
                android:drawableRight="@drawable/tour_avatar2"
```

--------------------------------

### Android A-B Interface Animations: Translation and Alpha

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

Java code demonstrating sequential animations for the A-B interface. It applies `translationY` and `alpha` transformations to `iv_initial_phone` (translationY: -600 to -900), `ll_comments` (alpha: 1 to 0), `ll_rows` (translationY: -1000 to 0, alpha: 1 to 0.5), and `iv_final_photo` (translationY: -1000 to 0, alpha: 0.5 to 1) to create dynamic transitions. The `f` and `p` variables likely represent animation progress values.

```Java
 iv_initial_phone.setTranslationY(-600 + -300 * f);

ll_comments.setAlpha(p);

ll_rows.setTranslationY(-1000 * p);
ll_rows.setAlpha(0.5f + 0.5f * f);

iv_final_photo.setTranslationY(-1000 * p);
iv_final_photo.setAlpha(0.5f + 0.5f * f);
```

--------------------------------

### Android Blurring Effect: Java Code to Set Blurred View

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

Java code to link the `BlurringView` to the view that needs to be blurred. It retrieves the target view by its ID and then sets it as the source for the blurring effect.

```Java
 View blurredView = findViewById(R.id.blurredView);
 blurringView.setBlurredView(blurredView);
```

--------------------------------

### Android Blurring Effect: Gradle Renderscript Configuration

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

Gradle configuration snippet required to enable Renderscript support for the blurring effect. `renderscriptTargetApi` specifies the API level for Renderscript compilation, and `renderscriptSupportModeEnabled` enables compatibility for older Android versions.

```Gradle
renderscriptTargetApi 18
renderscriptSupportModeEnabled true
```

--------------------------------

### Android C-D Interface Animations: Scale, Translation, and Alpha

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

Java code implementing animations for the C-D interface. It applies scaling to `iv_final_photo` (scaleX/Y: 1 to 3), alternating horizontal translations to children of `ll_rows` (odd rows right: 0 to -100, even rows left: 0 to 100) along with alpha changes, and vertical translations to `tv_avatar_you` (translationY: -300 to 0) and `tv_register` (translationX: 300 to 0). This creates a complex, coordinated animation sequence.

```Java
iv_final_photo.setScaleX(1 + 3 * f); //1~3
iv_final_photo.setScaleY(1 + 3 * f); //1~3

for (int i = 0; i < ll_rows.getChildCount(); i++) {
   View child = ll_rows.getChildAt(i);
   child.setAlpha(p);
   if (i % 2 == 0) {
       child.setTranslationX(100 * f);
   } else {
       child.setTranslationX(-100 * f);
   } 
}

tv_avatar_you.setTranslationY(-300 + 300 * f);

tv_register.setTranslationY(300 - 300 * f);
```

--------------------------------

### Android Blurring Effect: Java Code to Invalidate BlurringView

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

Java code to force the `BlurringView` to redraw itself, which is necessary to update the blur effect, especially if the underlying content changes or the blur parameters are modified dynamically.

```Java
 blurringView.invalidate();
```

--------------------------------

### Android C-D Interface Animation: Setting View Pivot Points

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

Java code to set the pivot points for `iv_final_photo`. This is crucial for scale and rotation animations to occur around a specific origin, here set to the top-center of the image view.

```Java
iv_final_photo.setPivotY(0f);
iv_final_photo.setPivotX(iv_final_photo.getWidth() / 2);
```

--------------------------------

### Android Blurring Effect: XML Layout for BlurringView

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

XML layout definition for `BlurringView`, a custom view for applying a blurring effect. It specifies dimensions, positioning, and custom attributes like `blurRadius`, `downsampleFactor`, and `overlayColor` to control the blur appearance.

```XML
   <hanks.com.customview.BlurringView
        android:id="@+id/blurringView"
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:layout_alignParentBottom="true"
        app:blurRadius="11"
        app:downsampleFactor="6"
        app:overlayColor="#99FFFFFF"
        >
    </hanks.com.customview.BlurringView>
```

--------------------------------

### Android Custom Page Scroll Animations

Source: https://github.com/hanks-zyh/500px-guideview/blob/master/README.md

This Java code defines a comprehensive animation logic for page transitions in an Android application. It calculates animation progress based on the scroll 'position' and applies different sets of transformations (translation, scaling, alpha adjustments) to various UI elements like images, layouts, and text views. The animations are segmented into distinct phases ('A ~ B', 'B ~ C', 'C ~ D' interfaces) based on the 'currentPosition' to create a dynamic and interactive user experience during page swiping.

```Java
            } else if (position <= 1) { // (0,1]
                // Fade the page out.

                float p = Math.abs(position);
                float f = (1 - p);

                Log.i("", "p= " + p);
                // p : 1~0
                // f : 0~1

                iv_final_photo.setPivotY(0f);
                iv_final_photo.setPivotX(iv_final_photo.getWidth() / 2);

                if (-1 < currentPosition && currentPosition <= 0) {
                    // A ~ B 界面的动画

                    iv_initial_phone.setTranslationY(-600 * f);
                    iv_initial_phone.setScaleX(0.5f * p + 0.5f);
                    iv_initial_phone.setScaleY(0.5f * p + 0.5f);
                    iv_device.setScaleX(1 + 2 * f);

                    if (p > 0.5 && p <= 1) {
                        iv_device.setAlpha(2 * p - 1);
                    } else {
                        iv_device.setAlpha(0f);
                    }

                    ll_comments.setTranslationY(800 * p);
                    ll_comments.setAlpha(f);
                    ll_comments.setScaleX(2 - f);
                    ll_comments.setScaleY(2 - f);

                    ll_rows.setTranslationY(-1000 - 500 * p);
                    ll_rows.setAlpha(0.5f);
                    iv_final_photo.setTranslationY(-1000 - 500 * p);
                    iv_final_photo.setAlpha(0.5f);

                    tv_avatar_you.setTranslationY(-300);

                    tv_register.setTranslationY(300);

                } else if (-2 < currentPosition && currentPosition <= -1) {
                    // B ~ C 界面的动画

                    iv_initial_phone.setTranslationY(-600 + -300 * f);

                    ll_comments.setAlpha(p);

                    ll_rows.setTranslationY(-1000 * p);
                    ll_rows.setAlpha(0.5f + 0.5f * f);

                    iv_final_photo.setTranslationY(-1000 * p);
                    iv_final_photo.setAlpha(0.5f + 0.5f * f);

                    tv_avatar_you.setTranslationY(-300);
                    tv_register.setTranslationY(300);
                } else if (-3 < currentPosition && currentPosition <= -2) {
                    // C ~ D 界面的动画


                    iv_final_photo.setScaleX(1 + 3 * f); //1~3
                    iv_final_photo.setScaleY(1 + 3 * f); //1~3

                    for (int i = 0; i < ll_rows.getChildCount(); i++) {
                        View child = ll_rows.getChildAt(i);
                        child.setAlpha(p);
                        if (i % 2 == 0) {
                            child.setTranslationX(100 * f);
                        } else {
                            child.setTranslationX(-100 * f);
                        }
                    }

                    tv_avatar_you.setTranslationY(-300 + 300 * f);

                    tv_register.setTranslationY(300 - 300 * f);
                }


            } else { // (1,+Infinity]
                // This page is way off-screen to the right.
            }
        }
    }
}
```

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