activity实现滑动效果
可滑动的activity
- 可滑动的activity原理，就是将activity的theme设置为透明，之后滑动view的parent即可
- 效果图
主题透明
android:theme="@android:style/Theme.Translucent.NoTitleBar"之后自定义一个SwipLayout 继承FrameLayout
`public class SwipLayout extends FrameLayout { private View parent; public SwipLayout(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public SwipLayout(Context context, AttributeSet attrs) { this(context, attrs,0); // TODO Auto-generated constructor stub } public SwipLayout(Context context) { this(context,null); }`之后我们拿到swiplayout的parent。因为我们使用scrollto，因此应该对父容器进行滚动
`public void onWindowFocusChanged(boolean hasWindowFocus) { // 在界面可以和用户交互的时候 并且第一次的时候 才进行初始化 super.onWindowFocusChanged(hasWindowFocus); if(hasWindowFocus&&isFirst){ isFirst=false; init(); //拿到父容器 当window可见的时候 } } private void init() { parent = (View) getParent(); }`
之后对相关事件进行拦截
`public boolean onInterceptTouchEvent(MotionEvent ev) { switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: curX = (int) ev.getRawX(); x=curX; break; case MotionEvent.ACTION_MOVE: int touchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop(); if(ev.getRawX()-curX>touchSlop) { // Log.e("", "actionMove"); //小于触摸的范围就可以 if(ev.getRawX()<100) return true;//拦截 } break; } return super.onInterceptTouchEvent(ev); }`- 一定要使用屏幕坐标，否则会造成卡顿，因为我们在拿view的坐标的时候，view的位置也在改变
在onTouchEvent中处理，拦截的事件即可
`public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: x = (int) event.getRawX();// 要拿到屏幕的坐标 break; case MotionEvent.ACTION_MOVE: int min=(int) (event.getRawX()-x); if(parent.getScrollX()<=0&&parent.getScrollX()>=-parent.getWidth()) {parent.scrollTo(Math.min(Math.max(parent.getScrollX()-min, -parent.getWidth()), 0), 0); x=(int) event.getRawX(); //一定获得屏幕的坐标 不要 相对坐标 否则会造成闪动 return true; } break; case MotionEvent.ACTION_UP: if(parent.getScrollX()<-parent.getWidth()/2){ //关闭 colse(); }else if(parent.getScrollX()>-parent.getWidth()/2){ //打开 open(); } break; } return super.onTouchEvent(event); }`之后我们自定义了动画，完成关闭和开启
`class ScrollAnimation extends Animation{ private int end; private int lenght; private int start; public ScrollAnimation(int end) { this.end = end; lenght=end-parent.getScrollX(); setDuration(Math.abs(lenght)/2); start=parent.getScrollX(); } @Override protected void applyTransformation(float interpolatedTime, Transformation t) { // 0--100 1s //interpolatedTime 比例 0f-1f super.applyTransformation(interpolatedTime, t); int path= (int) (interpolatedTime*lenght); int currentX=start+path; if(currentX>0)currentX=0; if(currentX<-parent.getWidth())currentX=-parent.getWidth(); parent.scrollTo(currentX, 0); } }`activity滑出右侧时候，接口回调
`public interface onSwipCloseListener{ public void onSwipClose(); } public void setOnSwipCloseListener(onSwipCloseListener closeListener){ this.swipCloseListener=closeListener; }`- swiplayout一定是顶层布局才生效
- 总结，滑动的activity本质就是修改contentView的父容器 也就是修改id为content的FragmentLayout的子view
源码如下
`package com.example.swiplayout; import android.app.Activity; import android.content.Context; import android.graphics.drawable.BitmapDrawable; import android.provider.ContactsContract.CommonDataKinds.Event; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.ViewConfiguration; import android.view.ViewGroup; import android.view.ViewParent; import android.view.ViewPropertyAnimator; import android.view.WindowManager; import android.widget.FrameLayout; import android.view.View.OnTouchListener; import android.view.animation.Animation; import android.view.animation.Animation.AnimationListener; import android.view.animation.Transformation; public class SwipLayout extends FrameLayout { private View parent; public SwipLayout(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public SwipLayout(Context context, AttributeSet attrs) { this(context, attrs,0); // TODO Auto-generated constructor stub } public SwipLayout(Context context) { this(context,null); } private void init() { parent = (View) getParent(); } @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: x = (int) event.getRawX();// 要拿到屏幕的坐标 break; case MotionEvent.ACTION_MOVE: int min=(int) (event.getRawX()-x); if(parent.getScrollX()<=0&&parent.getScrollX()>=-parent.getWidth()) {parent.scrollTo(Math.min(Math.max(parent.getScrollX()-min, -parent.getWidth()), 0), 0); x=(int) event.getRawX(); //一定获得屏幕的坐标 不要 相对坐标 否则会造成闪动 return true; } break; case MotionEvent.ACTION_UP: if(parent.getScrollX()<-parent.getWidth()/2){ //关闭 colse(); }else if(parent.getScrollX()>-parent.getWidth()/2){ //打开 open(); } break; } return super.onTouchEvent(event); } private void colse() { ScrollAnimation closeAnimation=new ScrollAnimation(-parent.getWidth()); parent.startAnimation(closeAnimation); closeAnimation.setAnimationListener(new AnimationListenerAdapter(){ @Override public void onAnimationEnd(Animation animation) { // TODO Auto-generated method stub super.onAnimationEnd(animation); if(swipCloseListener!=null){ swipCloseListener.onSwipClose(); } } }); } private void open() { ScrollAnimation open=new ScrollAnimation(0); parent.startAnimation(open); } boolean isFirst=true; private int x; @Override public void onWindowFocusChanged(boolean hasWindowFocus) { // 在界面可以和用户交互的时候 并且第一次的时候 才进行初始化 super.onWindowFocusChanged(hasWindowFocus); if(hasWindowFocus&&isFirst){ isFirst=false; init(); //拿到父容器 当window可见的时候 } } class ScrollAnimation extends Animation{ private int end; private int lenght; private int start; public ScrollAnimation(int end) { this.end = end; lenght=end-parent.getScrollX(); setDuration(Math.abs(lenght)/2); start=parent.getScrollX(); } @Override protected void applyTransformation(float interpolatedTime, Transformation t) { // 0--100 1s //interpolatedTime 比例 0f-1f super.applyTransformation(interpolatedTime, t); int path= (int) (interpolatedTime*lenght); int currentX=start+path; if(currentX>0)currentX=0; if(currentX<-parent.getWidth())currentX=-parent.getWidth(); parent.scrollTo(currentX, 0); } } private onSwipCloseListener swipCloseListener; private int curX; public interface onSwipCloseListener{ public void onSwipClose(); } public void setOnSwipCloseListener(onSwipCloseListener closeListener){ this.swipCloseListener=closeListener; } //实现了一个animation适配器 class AnimationListenerAdapter implements AnimationListener{ @Override public void onAnimationStart(Animation animation) { // TODO Auto-generated method stub } @Override public void onAnimationEnd(Animation animation) { // TODO Auto-generated method stub } @Override public void onAnimationRepeat(Animation animation) { // TODO Auto-generated method stub } } @Override public boolean onInterceptTouchEvent(MotionEvent ev) { switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: curX = (int) ev.getRawX(); x=curX; break; case MotionEvent.ACTION_MOVE: int touchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop(); if(ev.getRawX()-curX>touchSlop) { // Log.e("", "actionMove"); //小于触摸的范围就可以 if(ev.getRawX()<100) return true;//拦截 } break; } return super.onInterceptTouchEvent(ev); } }`