Android實現用戶引導界面

jopen 10年前發布 | 17K 次閱讀 Android Android開發移動開發
首先看效果圖，盜了超級課程表幾張圖
這里寫圖片描述
在眾多應用中,幾乎每一款應用都有自己的Splash用戶引導界面,該界面在用戶首次啟動展示,之后不會顯示,主要向用戶展示新功能.
分析

主要使用ViewPager+Indicator實現
主要是實現一個圓形指示器,這個圓形指示器繼承LinearLayout,需要有一些屬性可以自定義,比如指示器的顏色,大小,邊距等
這個指示器也可以自動滾動,比如應用在幻燈片展示的地方
指示器是圓形的,需要我們自己繪制
這個圓形指示器實現了ViewPager.OnPageChangeListener接口
實現

定義自定義屬性
屬性的意思見名字就可以知道了
<resources>

<declare-styleable name="CircleIndicator">
    <attr name="circle_spacing" format="dimension"/>
    <attr name="circle_fill_color" format="color|reference"/>
    <attr name="circle_stroke_color" format="color|reference"/>
    <attr name="circle_radius" format="dimension"/>
    <attr name="circle_auto_scroll" format="boolean"/>
    <attr name="circle_scroll_delay_time" format="integer"/>
    <attr name="circle_scroll_animation" format="boolean"/>
</declare-styleable>


</resources></pre>

定義自定義變量,從布局文件中解析進來,此外,如果布局文件沒有使用,應該有一個默認的常量. 

定義默認常量 
 private static final int DEFAULT_CIRCLE_SPACING = 5;
    private static final int DEFAULT_CIRCLE_COLOR=Color.WHITE;
    private static final int DEFAULT_CIRCLE_SIZE=3;
    private static final boolean DEFAULT_CIRCLE_AUTO_SCROLL=false;
    private static final int DEFAULT_CIRCLE_SCROLL_DELAY_TIME=3000;
    private static final boolean DEFAULT_CIRCLE_SCROLL_ANIMATION=true;


定義用于存儲自定義屬性的變量 

  private int mSpacing;
    private int mSize;
    private int mFillColor;
    private int mStrokeColor;
    private boolean mAutoScroll;
    private int mDelayTime;
    private boolean mIsAnimation;


定義其他輔助變量,比如Canvas,Bitmap,Paint等,用于繪制圓形指示器 

    private static final int CIRCLE_STROKE_WIDTH =1;
    private static final int BITMAP_PADDING =2;
 private ViewPager mViewPager;
    private int mCount;
    private int mLastIndex = 0;
    private Canvas mCanvas;
    private Paint mPaint;
    private Bitmap mSelectBitmap;
    private Bitmap mUnselectBitmap;


將自定義屬性進行解析賦值給對應變量 

private void initCustomParams(Context context, AttributeSet attrs) {
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.CircleIndicator);
        try {
            mSpacing = typedArray.getDimensionPixelSize(R.styleable.CircleIndicator_circle_spacing, DEFAULT_CIRCLE_SPACING);
            mFillColor=typedArray.getColor(R.styleable.CircleIndicator_circle_fill_color,DEFAULT_CIRCLE_COLOR);
            mStrokeColor=typedArray.getColor(R.styleable.CircleIndicator_circle_stroke_color,DEFAULT_CIRCLE_COLOR);
            mSize= typedArray.getDimensionPixelSize(R.styleable.CircleIndicator_circle_radius, DEFAULT_CIRCLE_SIZE);
            mAutoScroll= typedArray.getBoolean(R.styleable.CircleIndicator_circle_auto_scroll, DEFAULT_CIRCLE_AUTO_SCROLL);
            mDelayTime=typedArray.getInt(R.styleable.CircleIndicator_circle_scroll_delay_time,DEFAULT_CIRCLE_SCROLL_DELAY_TIME);
            mIsAnimation=typedArray.getBoolean(R.styleable.CircleIndicator_circle_scroll_animation,DEFAULT_CIRCLE_SCROLL_ANIMATION);

    } finally {
        typedArray.recycle();
    }
}</pre><br />

我們的指示器是自己繪制出來的,接下來繪制圓形指示器 

   private void init() {
        setOrientation(HORIZONTAL);

    mPaint = new Paint();
    mPaint.setAntiAlias(true);
    mPaint.setDither(true);
    mPaint.setStyle(Paint.Style.FILL_AND_STROKE);

    mPaint.setStrokeWidth(dip2px(CIRCLE_STROKE_WIDTH));
    mPaint.setColor(mFillColor);

    int size=dip2px(mSize+ BITMAP_PADDING + BITMAP_PADDING);
    int radius=dip2px(mSize / 2);
    int centerPoint=radius+ BITMAP_PADDING;

    mSelectBitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
    mUnselectBitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);

    mCanvas = new Canvas();
    mCanvas.setBitmap(mSelectBitmap);


    mCanvas.drawCircle(centerPoint, centerPoint, radius, mPaint);

    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setColor(mStrokeColor);
    mCanvas.setBitmap(mUnselectBitmap);
    mCanvas.drawCircle(centerPoint, centerPoint, radius, mPaint);

}</pre><br />

實現構造方法,最終調用三個參數的構造方法,并調用相關函數進行初始化 

 public CircleIndicator(Context context) {
        this(context, null);
    }

public CircleIndicator(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
}

public CircleIndicator(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    initCustomParams(context, attrs);
    init();
}</pre><br />

實現指示器相關邏輯 


首先需要初始化指示器的位置,應該是ViewPager的第一頁,即初始化位置為0,調用initIndicator,并設置指示器的背景圖為選中狀態.記錄上次指示器的位置即當前位置. 

removeIndicator移出指示器只要移出當前類的所有子View即可 

updateIndicator需要將上次的位置背景圖設置為未選中,當前位置設置未選中,并記錄上次位置為當前位置 

addIndicator需要將圓形指示器的數目傳入,其值為ViewPager的頁數,并新建ImageView設置背景圖為未選中的時候的圖,并設置外邊距,將其添加到當前類的子View中,如果設置了自動滾動,還需要進行自動滾動 

setViewPager函數進行一些初始化操作 
</ul>
public void setViewPager(ViewPager viewPager) {
        mViewPager = viewPager;
        mViewPager.addOnPageChangeListener(this);
        if (mViewPager != null) {
            mCount = mViewPager.getAdapter().getCount();
            addIndicator(mCount);
        }

}

private void addIndicator(int count) {
    removeIndicator();
    if (count <= 0)
        return;
    for (int i = 0; i < count; i++) {
        ImageView imageView = new ImageView(getContext());
        LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        params.leftMargin = mSpacing/2;
        params.rightMargin = mSpacing/2;

        imageView.setImageBitmap(mUnselectBitmap);
        addView(imageView, params);
    }
    initIndicator();
    if(mAutoScroll){
        sendScrollMessage(mDelayTime);
    }
}

private void initIndicator() {
    ((ImageView) getChildAt(0)).setImageBitmap(mSelectBitmap);
    mLastIndex=0;
}

private void removeIndicator() {
    removeAllViews();
}

private void updateIndicator(int position) {

    if (position != mLastIndex) {
        ((ImageView) getChildAt(mLastIndex)).setImageBitmap(mUnselectBitmap);
        ((ImageView) getChildAt(position)).setImageBitmap(mSelectBitmap);
    }
    mLastIndex = position;

}</pre><br />

實現自動滾動,主要通過Handler進行延時實現 

private Handler mHandler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
                case SCROLL_WHAT:
                    scrollOnce();
                    sendScrollMessage(mDelayTime);
                    break;
            }
        }
    };
    public void scrollOnce() {
        PagerAdapter adapter = mViewPager.getAdapter();
        if (adapter == null) {
            return;
        }
        int nextIndex=mViewPager.getCurrentItem();
        ++nextIndex;
        if(nextIndex >=mCount){
            nextIndex =0;
        }
        updateIndicator(nextIndex);
        mViewPager.setCurrentItem(nextIndex, mIsAnimation);

}

private void sendScrollMessage(long delayTimeInMills) {
    mHandler.removeMessages(SCROLL_WHAT);
    mHandler.sendEmptyMessageDelayed(SCROLL_WHAT, delayTimeInMills);
}</pre><br />

實現相關getter和setter函數 

private void setAutoScroll(boolean autoScroll){
        if (autoScroll){
            sendScrollMessage(mDelayTime);
        }else{
            mHandler.removeMessages(SCROLL_WHAT);
        }
        mAutoScroll=autoScroll;

}
public boolean isAutoScroll() {
    return mAutoScroll;
}

public int getDelayTime() {
    return mDelayTime;
}

public void setDelayTime(int delayTime) {
    mDelayTime = delayTime;
}

public boolean isAnimation() {
    return mIsAnimation;
}

public void setIsAnimation(boolean isAnimation) {
    mIsAnimation = isAnimation;
}</pre><br />

實現接口相關函數 
 @Override
    public void onPageScrolled(int i, float v, int i1) {

}

@Override
public void onPageSelected(int position) {
    updateIndicator(position);
}


@Override
public void onPageScrollStateChanged(int i) {

}</pre><br />

以及一個單位轉換的工具函數 

private int dip2px(int dip) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dip, getResources().getDisplayMetrics());
    }


使用 

<RelativeLayout xmlns:android="

tools:context=".MainActivity">

<android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentTop="true"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true"
    ></android.support.v4.view.ViewPager>

<cn.edu.zafu.view.CircleIndicator
    android:id="@+id/circle_indicator"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_horizontal"
    android:layout_alignParentBottom="true"
    android:layout_marginBottom="10dp"
    indicator:circle_spacing="5dp"
    indicator:circle_radius="3dp"
    indicator:circle_fill_color="#728bff"
    indicator:circle_stroke_color="#aaa"
    indicator:circle_auto_scroll="true"
    >

</cn.edu.zafu.view.CircleIndicator>

</RelativeLayout></pre>

private void initView() {
        mViewPager= (ViewPager) findViewById(R.id.viewpager);
        mCircleIndicator= (CircleIndicator) findViewById(R.id.circle_indicator);
        mViewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {

        private int[] resId={R.mipmap.ic_help_view_1,R.mipmap.ic_help_view_2,R.mipmap.ic_help_view_3,R.mipmap.ic_help_view_4};
        private Map<Integer,Fragment> mFragments=new HashMap<Integer,Fragment>();
        @Override
        public Fragment getItem(int i) {
            Fragment fragment=mFragments.get(i);
            if(fragment==null){
                fragment=BlankFragment.newInstance(resId[i],i,resId.length);
                mFragments.put(i,fragment);
            }
            return fragment;
        }

        @Override
        public int getCount() {
            return resId.length;
        }
    });
    mCircleIndicator.setViewPager(mViewPager);
}</pre><br />

package cn.edu.zafu.splash;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.RelativeLayout;
public class BlankFragment extends Fragment {

private static final String IMAGE_ID = "imageId";
private static final String CUCRNT = "curcent";
private static final String TOTAL = "total";
private int mImageId;
private int mCurcent;
private int mTotal;


public static BlankFragment newInstance(int imageId,int current,int total) {
    BlankFragment fragment = new BlankFragment();
    Bundle args = new Bundle();
    args.putInt(IMAGE_ID, imageId);
    args.putInt(CUCRNT, current);
    args.putInt(TOTAL, total);
    fragment.setArguments(args);
    return fragment;
}

public BlankFragment() {

}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (getArguments() != null) {
        mImageId = getArguments().getInt(IMAGE_ID);
        mCurcent = getArguments().getInt(CUCRNT);
        mTotal = getArguments().getInt(TOTAL);

    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    View view= inflater.inflate(R.layout.fragment_blank, container, false);
    return view;
}

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    getActivity().getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    super.onViewCreated(view, savedInstanceState);
    ImageView imageView= (ImageView) view.findViewById(R.id.image);
    imageView.setImageResource(mImageId);
    if(mCurcent==mTotal-1){
        RelativeLayout relativeLayout= (RelativeLayout) view.findViewById(R.id.relativelayout);
        ImageButton button=new ImageButton(getActivity().getApplicationContext());
        button.setBackgroundResource(R.drawable.last_button_selector);

        RelativeLayout.LayoutParams params=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);

        params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
        params.addRule(RelativeLayout.CENTER_HORIZONTAL);
        params.bottomMargin=dip2px(80);
        relativeLayout.addView(button,params);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int versionCode=Util.getAppVersionCode(getActivity());
                Util.set(getActivity(),Util.FILE_NAME,versionCode+"",true);
                Intent intent=new Intent(getActivity(),SecondActivity.class);
                startActivity(intent);
                getActivity().finish();
            }
        });
    }
}
private int dip2px(int dip) {
    return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dip, getActivity().getResources().getDisplayMetrics());
}


}</pre>

如果要實現是否首次啟動,如果是才顯示的話需要加一些邏輯判斷,如果當前版本號已經持久化了,則直接跳過,這個數據是在Splash頁面最后一個按鈕點擊事件里處理的 

private boolean ignoreSplash() {
        if(Util.contatins(this, Util.FILE_NAME, Util.getAppVersionCode(this) + "")){
            Intent intent=new Intent(MainActivity.this,SecondActivity.class);
            startActivity(intent);
            this.finish();
            return true;
        }
        return false;
    }


public void onClick(View v) {
                    int versionCode=Util.getAppVersionCode(getActivity());
                    Util.set(getActivity(),Util.FILE_NAME,versionCode+"",true);
                    Intent intent=new Intent(getActivity(),SecondActivity.class);
                    startActivity(intent);
                    getActivity().finish();
                }


源碼下載 


http://download.csdn.net/detail/sbsujjbcy/8814627 
</ul>
來自：http://blog.csdn.net/sbsujjbcy/article/details/46531351
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Android Android開發移動開發
Android實現用戶引導界面

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