android的页面滑动可以使用ViewPager实现，但是使用viewpage还是存在一些问题。
在网上找到了一个Demo，他是直接写一个布局来实现屏幕的滚动滑动，效果还不错。
分享一下。
源码如下，DEMO在附件中。
package com.work.demoa;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.widget.Scroller;
public class ScrollLayout extends ViewGroup {
private static final String TAG = "ScrollLayout";
private Scroller mScroller = null;
private VelocityTracker mVelocityTracker = null;
private int mCurScreen = 0;
private int mDefaultScreen = 1;
private static final int TOUCH_STATE_REST = 0;
private static final int TOUCH_STATE_SCROLLING = 1;
private static final int SNAP_VELOCITY = 600;
private int mTouchState = TOUCH_STATE_REST;
private int mTouchSlop = 0;
private float mLastMotionX = 0;
private float mLastMotionY = 0;
private OnScreenChangedListener mOnScreenChangedListener;
public void setOnScreenChangedListener(OnScreenChangedListener l) {
mOnScreenChangedListener = l;
}
public interface OnScreenChangedListener {
void onScreenChanged(ScrollLayout sc, int whichScreen);
}
public ScrollLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ScrollLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mScroller = new Scroller(context);
mCurScreen = mDefaultScreen;
mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
// TODO Auto-generated method stub
if (changed) {
int childLeft = 0;
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View childView = getChildAt(i);
if (childView.getVisibility() != View.GONE) {
final int childWidth = childView.getMeasuredWidth();
childView.layout(childLeft, 0, childLeft + childWidth,
childView.getMeasuredHeight());
childLeft += childWidth;
}
}
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
Log.e(TAG, "onMeasure");
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
final int width = MeasureSpec.getSize(widthMeasureSpec);
final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
if (widthMode != MeasureSpec.EXACTLY) {
throw new IllegalStateException(
"ScrollLayout only can run at EXACTLY mode!");
}
final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
if (heightMode != MeasureSpec.EXACTLY) {
throw new IllegalStateException(
"ScrollLayout only can run at EXACTLY mode!");
}
// The children are given the same width and height as the scrollLayout
final int count = getChildCount();
for (int i = 0; i < count; i++) {
getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec);
}
// Log.e(TAG, "moving to screen "+mCurScreen);
scrollTo(mCurScreen * width, 0);
}
/**
* According to the position of current layout scroll to the destination
* page.
*/
public void snapToDestination() {
final int screenWidth = getWidth();
final int destScreen = (getScrollX() + screenWidth / 2) / screenWidth;
snapToScreen(destScreen);
}
public void snapToScreen(int whichScreen) {
// get the valid layout page
whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1));
if (getScrollX() != (whichScreen * getWidth())) {
final int delta = whichScreen * getWidth() - getScrollX();
mScroller.startScroll(getScrollX(), 0, delta, 0,
Math.abs(delta) * 2);
mCurScreen = whichScreen;
invalidate(); // Redraw the layout
mOnScreenChangedListener.onScreenChanged(this, mCurScreen);
}
}
public void setToScreen(int whichScreen) {
whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1));
mCurScreen = whichScreen;
scrollTo(whichScreen * getWidth(), 0);
}
public int getCurScreen() {
return mCurScreen;
}
@Override
public void computeScroll() {
if (mScroller.computeScrollOffset()) {
scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
postInvalidate();
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (mVelocityTracker == null) {
mVelocityTracker = VelocityTracker.obtain();
}
mVelocityTracker.addMovement(event);
final int action = event.getAction();
final float x = event.getX();
final float y = event.getY();
switch (action) {
case MotionEvent.ACTION_DOWN:
Log.e(TAG, "event down!");
if (!mScroller.isFinished()) {
mScroller.abortAnimation();
}
mLastMotionX = x;
break;
case MotionEvent.ACTION_MOVE:
// Log.e(TAG, "event down!");
//如果去掉if条件控制就会变成划到最后一个还会出现白色方框
if (mCurScreen != 0&&mCurScreen!=2) {
int deltaX = (int) (mLastMotionX - x);
mLastMotionX = x;
scrollBy(deltaX, 0);
}
break;
case MotionEvent.ACTION_UP:
Log.e(TAG, "event : up");
// if (mTouchState == TOUCH_STATE_SCROLLING) {
final VelocityTracker velocityTracker = mVelocityTracker;
velocityTracker.computeCurrentVelocity(1000);
int velocityX = (int) velocityTracker.getXVelocity();
Log.e(TAG, "velocityX:" + velocityX);
if (velocityX > SNAP_VELOCITY && mCurScreen > 0) {
// Fling enough to move left
Log.e(TAG, "snap left");
snapToScreen(mCurScreen - 1);
} else if (velocityX < -SNAP_VELOCITY
&& mCurScreen < getChildCount() - 1) {
// Fling enough to move right
Log.e(TAG, "snap right");
snapToScreen(mCurScreen + 1);
} else {
snapToDestination();
}
if (mVelocityTracker != null) {
mVelocityTracker.recycle();
mVelocityTracker = null;
}
// }
mTouchState = TOUCH_STATE_REST;
break;
case MotionEvent.ACTION_CANCEL:
mTouchState = TOUCH_STATE_REST;
break;
}
return true;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
Log.e(TAG, "onInterceptTouchEvent-slop:" + mTouchSlop);
final int action = ev.getAction();
if ((action == MotionEvent.ACTION_MOVE)
&& (mTouchState != TOUCH_STATE_REST)) {
return true;
}
final float x = ev.getX();
final float y = ev.getY();
switch (action) {
case MotionEvent.ACTION_MOVE:
final int xDiff = (int) Math.abs(mLastMotionX - x);
if (xDiff > mTouchSlop) {
mTouchState = TOUCH_STATE_SCROLLING;
}
break;
case MotionEvent.ACTION_DOWN:
mLastMotionX = x;
mLastMotionY = y;
mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST
: TOUCH_STATE_SCROLLING;
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
mTouchState = TOUCH_STATE_REST;
break;
}
return mTouchState != TOUCH_STATE_REST;
}
}
//----------------mainActiviyt-----------------
package com.work.demoa;
import com.work.demoa.ScrollLayout.OnScreenChangedListener;
import android.app.Activity;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity implements OnScreenChangedListener {
private ImageView mImageView;
private TextView mTextView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ScrollLayout scrollLayout = (ScrollLayout) findViewById(R.id.ScrollLayoutID);
int curScreen = scrollLayout.getCurScreen();
scrollLayout.setOnScreenChangedListener(this);
mImageView = (ImageView) findViewById(R.id.imageView1);
mTextView = (TextView) findViewById(R.id.textView_header);
}
@Override
public void onScreenChanged(ScrollLayout sc, int whichScreen) {
switch (whichScreen) {
case 0:
mImageView.setImageResource(R.color.blue);
mTextView.setText("left page");
break;
case 1:
mTextView.setText("center page");
mImageView.setImageResource(R.color.grayblack);
break;
case 2:
mTextView.setText("right page");
mImageView.setImageResource(R.color.green);
break;
}
}
}
//-------------------------布局文件----------------------
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout
xmlns:Android="http://schemas.android.com/apk/res/android"
Android:layout_width="fill_parent"
Android:layout_height="fill_parent"
Android:orientation="vertical">
<RelativeLayout
Android:id="@+id/view_top"
Android:orientation="horizontal"
Android:layout_width="fill_parent"
Android:layout_height="wrap_content"
Android:layout_alignParentTop="true"
Android:gravity="center">
<TextView
Android:text="head"
Android:textSize="15pt"
Android:layout_width="fill_parent"
Android:layout_height="wrap_content" />
<ImageView
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:src="@drawable/ic_launcher"
Android:id="@+id/imageView1"
Android:layout_alignParentTop="true"
Android:layout_alignParentRight="true"></ImageView>
<TextView
Android:layout_width="wrap_content"
Android:id="@+id/textView_header"
Android:text="center page"
Android:layout_height="wrap_content"
Android:textAppearance="?android:attr/textAppearanceMedium"
Android:layout_centerVertical="true"
Android:layout_alignParentLeft="true"
Android:layout_marginLeft="78dp"></TextView>
</RelativeLayout>
<RelativeLayout
Android:id="@+id/view_bottom"
Android:orientation="horizontal"
Android:layout_width="fill_parent"
Android:layout_height="wrap_content"
Android:layout_alignParentBottom="true"
Android:gravity="center">
<TextView
Android:text="footer"
Android:textSize="15pt"
Android:layout_width="fill_parent"
Android:layout_height="wrap_content" />
</RelativeLayout>
<com.work.demoa.ScrollLayout
xmlns:Android="http://schemas.android.com/apk/res/android"
Android:id="@+id/ScrollLayoutID"
Android:layout_width="fill_parent"
Android:layout_height="fill_parent"
Android:orientation="vertical"
Android:layout_above="@id/view_bottom"
Android:layout_below="@id/view_top">
<LinearLayout
Android:background="#0000ff"
Android:layout_width="fill_parent"
Android:layout_height="fill_parent">
<Button
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:text="Left" />
</LinearLayout>
<LinearLayout
Android:background="#00ff00"
Android:layout_width="fill_parent"
Android:layout_height="fill_parent">
<Button
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:text="Center" />
</LinearLayout>
<LinearLayout
Android:background="#ff0000"
Android:layout_width="wrap_content"
Android:layout_height="wrap_content">
<Button
Android:layout_width="wrap_content"
Android:layout_height="wrap_content"
Android:text="Right" />
</LinearLayout>
</com.work.demoa.ScrollLayout>
</RelativeLayout>
相关推荐
Android左右滑动，我们需要用到google提到的一个包——android-support-v4.jar，这个包是为了方便实现android view之间的切换，此资源可以直接打开使用，不会出现support的报错
android程序，滑动屏幕切换页面，anim文件夹里有进、出的移动、缩放、旋转等多种切换动画效果文件。
页面左右滑动效果，效果还是不错的，希望对大家有帮助
Android studio学习笔记：功能实现----》一个简单的页面滑动，第一个页面是屏幕分区，第二个页面是霓虹灯闪烁，第三个页面是一个计算器。
本Demo包含了通过左右滑动来切换activity和切换view(childView)。
下面的这个例子也是从网上找来的，不是自己写的，一直想学习下，但是一直没有写，以前也研究研究的是launcher的页面跳转，launcher修改--左右滑动屏幕切换源码追踪说实话，那个代码有点复杂，所以理解的也不是很透彻...
Android页面左右滑动，ViewPager的简单应用。Android页面左右滑动，ViewPager的简单应用。
一个纵向滑动的也就是上下滑动页面的效果，分享给大家
Android ViewPager实现仿QQ多页面滑动切换以及动画效果
源码SpringIndicator，SpringIndicator是一个Android页面滑动切换指示器，类似于早晨例行指南应用(Morning Routine guide)。它最初是基于BezierDemo。左右滑动切换页面，使用bezier实现粘连效果的页面指示，基于...
android 页面左右滑动 单击切换页面 代码可以直接运行。很好很实用的
可以在页面实现横向滑动，类似微信的滑动，包内付apk文件
如何实现手机上手动滑动翻页效果呢？呵呵，在这里我们就给你们介绍一下吧。 一般实现这个特效会用到一个控件：ViewFlipper <1>View切换的控件—ViewFlipper 这个控件是什么呢？请注意观看博文Android学习笔记之...
android滑动引导页面 viewpager实现 具体请看：http://blog.csdn.net/ttdevs/article/details/8681882
根据别人的代码进行修改，原先用java写的布局改为用xml布局文件，另外各个页面做了按钮点击相应事件。
android用fragment实现页面滑动，可做启动页和内部主体页
android 手势导致页面滑动
android上下滑动引导页 上下切换页面 手势判断 SurfaceView实现，不使用任何第三方jar包 安卓上下滑动引导页面 一次切换一个页面