Android 翻书效果

该控件大致实现方法：
eBook继承FrameLayout，好处在于FrameLayout有图层效果，后添加的View类能覆盖前面的View。


初始化：定义一个LinearLayout的成员变量mView，将page.xml inflate 成View分别用leftPage，rightPage引用，并初始化其数据，将leftPage，rightPage通过addView添加到 mView，然后将mView添加到eBook。在eBook里定义一个私有类BookView extends View。 并定义成员变量 BookView mBookView； 最后将mBookView添加的eBook中，这样，mView中的内容为书面内容，mBookView中的内容为特效内容。后续手势动作：可将各种手势的特效动作画于mBookView的画布中。


我们在来看看xml代码：


java代码：
main.xml文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<!--
广告创意放置的位置。
此处我放在Activity最顶部
-->
<!-- 广告位设置开始 -->
<com.adsame.mai.AdsameMob
android:layout_height="100dp"
android:layout_width="fill_parent"
android:id="@+id/adsameMobId"/>
<!-- 广告位设置结束 -->
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>








<!-- 广告位设置结束 --><TextViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"</LinearLayout>






page.xml文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android：orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="20dip"
android:background="#FFFFDD">
<ImageView android:layout_width="fill_parent" android:id="@+id/book_img"
android:layout_height="fill_parent" android:layout_weight="1"
android:scaleType="fitXY" android:src="@drawable/p1"/>
<com.book.TelEdit
android:id="@+id/book_text"
android:layout_width="fill_parent"
android:background="#ffffdd"
android:gravity="top"
android:typeface="sans"
android:capitalize="sentences"
android:lineSpacingExtra="5dip"
android:textSize="15dip"
android:textColor="#000000"
android:layout_height="fill_parent"
android:paddingTop="30dip"
android:layout_weight="1"/>
</LinearLayout>


控件TelEdit.java代码：java代码：
package eoe.book;


import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.WindowManager;
import android.widget.EditText;


public class TelEdit extends EditText {
Context mContext;
public TelEdit(Context context) {
super(context);
mContext = context;
}


public TelEdit(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
}


public TelEdit(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mContext = context;
}


protected void onDraw(Canvas canvas) {
WindowManager wm = (WindowManager) mContext.getSystemService("window");
int windowWidth = wm.getDefaultDisplay().getWidth();
int windowHeight = wm.getDefaultDisplay().getHeight();
Paint paint = new Paint();
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.BLACK);




int paddingTop = getPaddingTop();
int paddingBottom = getPaddingBottom();
int scrollY = getScrollY();
int scrollX = getScrollX() + windowWidth;
int innerHeight = scrollY + getHeight() - paddingBottom;
int lineHeight = getLineHeight();
int baseLine = scrollY+ (lineHeight - ((scrollY - paddingTop) % lineHeight));
int x = 8;




while (baseLine < innerHeight) {
canvas.drawLine(x, baseLine, scrollX - x, baseLine, paint);
baseLine += lineHeight;
}
super.onDraw(canvas);
}


}




eBook.java文件部分代码：


java代码：
package eoe.book;


import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Point;
import android.graphics.PorterDuffXfermode;
import android.graphics.Shader;
import android.graphics.PorterDuff.Mode;
import android.util.AttributeSet;
import android.util.Log;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.GestureDetector.OnGestureListener;
import android.widget.FrameLayout;
import android.widget.LinearLayout;


public class eBook extends FrameLayout{
public static final String LOG_TAG = "eBook";
List<Integer> myRecPages;
int totalPageNum;
Context mContext;
boolean hasInit = false;
final int defaultWidth = 600 , defaultHeight = 400;
int contentWidth = 0;
int contentHeight = 0;
View leftPage,rightPage,llPage,lrPage,rrPage,rlPage;
LinearLayout mView;
bookView mBookView;
boolean closeBook = false;


private enum Corner {
LeftTop,RightTop,LeftBottom,RightBottom,None
};


private Corner mSelectCorner;
final int clickCornerLen = 250*250; //50dip
float scrollX = 0,scrollY = 0;
int indexPage = 0;


private enum State {
ABOUT_TO_ANIMATE,ANIMATING,ANIMATE_END,READY,TRACKING
};


private State mState;
private Point aniStartPos;
private Point aniStopPos;
private Date aniStartTime;
private long aniTime = 2000;
private long timeOffset = 900;
Listener mListener;




private GestureDetector mGestureDetector;
private BookOnGestureListener mGestureListener;


public eBook(Context context) {
super(context);
Init(context);
}


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


}