观察qqminihd界面,发现其界面能够左右滑动来实现两侧菜单效果。
自定义Layout:ScrollLayout.java
直接贴出代码:
View Code
1 package grimbo.android.demo.slidingmenu; 2 3 import android.content.Context; 4 import android.util.AttributeSet; 5 import android.util.Log; 6 import android.view.GestureDetector; 7 import android.view.GestureDetector.OnGestureListener; 8 import android.view.MotionEvent; 9 import android.view.View; 10 import android.view.ViewConfiguration; 11 import android.view.animation.AnimationUtils; 12 import android.widget.LinearLayout; 13 import android.widget.Scroller; 14 15 public class ScrollLayout extends LinearLayout { 16 17 // private static final String TAG = "scroller"; 18 19 private Scroller scroller; 20 21 private int currentScreenIndex; 22 23 private GestureDetector gestureDetector; 24 25 // 设置一个标志位,防止底层的onTouch事件重复处理UP事件 26 private boolean fling; 27 28 /** 29 * 菜单栏的宽度 30 */ 31 int menuWidth=80; 32 33 /** 34 * 显示左边菜单 35 * 否则显示右边菜单 36 */ 37 private boolean showLeft=true; 38 39 /** 40 * 滚出边界监听器 41 */ 42 private OnScrollSideChangedListener scrollSideChangedListener; 43 44 public Scroller getScroller() { 45 return scroller; 46 } 47 48 public OnScrollSideChangedListener getScrollSideChangedListener() { 49 return scrollSideChangedListener; 50 } 51 52 public void setScrollSideChangedListener( 53 OnScrollSideChangedListener scrollSideChangedListener) { 54 this.scrollSideChangedListener = scrollSideChangedListener; 55 } 56 57 public ScrollLayout(Context context, AttributeSet attrs) { 58 super(context, attrs); 59 initView(context); 60 } 61 62 public ScrollLayout(Context context) { 63 super(context); 64 initView(context); 65 } 66 67 private void initView(final Context context) { 68 this.scroller = new Scroller(context,AnimationUtils.loadInterpolator(context, 69 android.R.anim.overshoot_interpolator)); 70 71 this.gestureDetector = new GestureDetector(new OnGestureListener() { 72 73 @Override 74 public boolean onSingleTapUp(MotionEvent e) { 75 return false; 76 } 77 78 @Override 79 public void onShowPress(MotionEvent e) { 80 } 81 82 @Override 83 public boolean onScroll(MotionEvent e1, MotionEvent e2, 84 float distanceX, float distanceY) { 85 86 {// 防止向第一页之前移动 87 if(1==currentScreenIndex) 88 { 89 int screenLeft=getWidth()-menuWidth; 90 if(showLeft && getScrollX()>screenLeft) 91 { 92 showLeft=false; 93 // Log.e("TAG","显示右边菜单栏"); 94 if(null!=scrollSideChangedListener) 95 scrollSideChangedListener.onScrollSideChanged(ScrollLayout.this, showLeft); 96 } 97 else if(!showLeft && getScrollX()<screenLeft) 98 { 99 showLeft=true; 100 // Log.e("TAG","显示左边菜单栏"); 101 if(null!=scrollSideChangedListener) 102 scrollSideChangedListener.onScrollSideChanged(ScrollLayout.this, showLeft); 103 } 104 } 105 106 fling = true; 107 scrollBy((int) distanceX, 0); 108 // Log.d("TAG", "on scroll>>>>>>>>>>>>>>>>>移动<<<<<<<<<<<<<<>>>"); 109 } 110 return true; 111 } 112 113 @Override 114 public void onLongPress(MotionEvent e) { 115 } 116 117 @Override 118 public boolean onFling(MotionEvent e1, MotionEvent e2, 119 float velocityX, float velocityY) { 120 121 if (Math.abs(velocityX) > ViewConfiguration.get(context) 122 .getScaledMinimumFlingVelocity()) 123 {// 判断是否达到最小轻松速度,取绝对值的 124 fling = true; 125 snapToDestination(); 126 // Log.d(TAG, "on scroll>>>>>>>>>>>>>>>>>滑动<<<<<<<<<<<<<<>>>"); 127 } 128 129 return true; 130 } 131 132 @Override 133 public boolean onDown(MotionEvent e) { 134 return false; 135 } 136 }); 137 138 } 139 //每一个屏的边界值 140 //0----[getWidth()-20]----[2*getWidth()-20]-----[3*getWidth()-40] 141 142 143 @Override 144 protected void onLayout(boolean changed, int left, int top, int right, 145 int bottom) { 146 /** 147 * 设置布局,将子视图顺序横屏排列 148 */ 149 super.onLayout(changed, left, top, right, bottom); 150 int move=getWidth()-menuWidth; 151 for (int i = 0; i < getChildCount(); i++) 152 { 153 View child = getChildAt(i); 154 // child.setVisibility(View.VISIBLE); 155 //移动一定的距离 156 child.layout(child.getLeft()+move,child.getTop(),child.getRight()+move,child.getBottom()); 157 } 158 } 159 160 @Override 161 public void computeScroll() { 162 if (scroller.computeScrollOffset()) { 163 // Log.d(TAG, ">>>>>>>>>>computeScroll>>>>>"+scroller.getCurrX()); 164 scrollTo(scroller.getCurrX(), 0); 165 postInvalidate(); 166 } 167 } 168 169 @Override 170 public boolean onTouchEvent(MotionEvent event) { 171 172 float x2s=getScrollX()+event.getX(); 173 174 if(x2s<getWidth()-menuWidth || x2s>2*getWidth()-menuWidth) 175 {//动作在区域外面 176 if(!fling)//没有在滑动 177 { 178 // Log.d(TAG, "on scroll>>>>>>>>>>>>>>>>>动作在区域外面 没有在滑动<<<<<<<<<<<<<<>>>"); 179 return false; 180 } 181 else if(MotionEvent.ACTION_UP!=event.getAction()) 182 {//否则如果也不是抬起手势,则强制模拟抬起 183 snapToDestination(); 184 fling = false; 185 // Log.d(TAG, "on scroll>>>>>>>>>>>>>>>>>动作在区域外面 在滑动 也不是抬起手势<<<<<<<<<<<<<<>>>"); 186 return false; 187 } 188 // Log.e(TAG, "on scroll>>>>>>>>>>>>>>>>>动作在区域外面 在滑动 是抬起手势<<<<<<<<<<<<<<>>>"); 189 } 190 191 gestureDetector.onTouchEvent(event); 192 193 switch (event.getAction()) { 194 case MotionEvent.ACTION_DOWN: 195 break; 196 case MotionEvent.ACTION_MOVE: 197 break; 198 case MotionEvent.ACTION_UP: 199 // Log.d(TAG, ">>ACTION_UP:>>>>>>>> MotionEvent.ACTION_UP>>>>>"); 200 // if (!fling) 201 { 202 snapToDestination(); 203 } 204 fling = false; 205 break; 206 default: 207 break; 208 } 209 return true; 210 } 211 212 /** 213 * 切换到指定屏 214 * 215 * @param whichScreen 216 */ 217 public void scrollToScreen(int whichScreen) { 218 if (getFocusedChild() != null && whichScreen != currentScreenIndex 219 && getFocusedChild() == getChildAt(currentScreenIndex)) { 220 getFocusedChild().clearFocus(); 221 } 222 int delta = 0; 223 224 if(whichScreen==0) 225 delta= - getScrollX(); 226 else if(whichScreen==1) 227 delta= getWidth()-menuWidth- getScrollX(); 228 else if(whichScreen==2) 229 delta= 2*(getWidth()-menuWidth)- getScrollX(); 230 else 231 return; 232 // delta = whichScreen * getWidth() - getScrollX(); 233 234 scroller.startScroll(getScrollX(), 0, delta, 0, Math.abs(delta) * 2); 235 invalidate(); 236 237 currentScreenIndex = whichScreen; 238 } 239 240 /** 241 * 根据当前x坐标位置确定切换到第几屏 242 */ 243 private void snapToDestination() { 244 245 if(getScrollX()<(getWidth()-menuWidth)/2) 246 scrollToScreen(0); 247 else if(getScrollX()<(getWidth()-menuWidth+getWidth()/2)) 248 scrollToScreen(1); 249 else 250 scrollToScreen(2); 251 } 252 253 public interface OnScrollSideChangedListener 254 { 255 public void onScrollSideChanged(View v,boolean leftSide); 256 } 257 }
接下来,在定义activity里面的布局my_layout.xml:
View Code
1 <?xml version="1.0" encoding="utf-8"?> 2 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 xmlns:app="http://schemas.android.com/apk/res/grimbo.android.demo.slidingmenu" 4 android:id="@+id/FrameLayout1" 5 android:layout_width="match_parent" 6 android:layout_height="match_parent" > 7 <LinearLayout 8 android:layout_width="match_parent" 9 android:layout_height="match_parent" 10 android:id="@+id/left_menu" 11 android:background="#333" 12 android:orientation="vertical" > 13 14 <Button 15 android:layout_width="200dp" 16 android:layout_height="wrap_content" 17 android:text="左菜单一" /> 18 <Button 19 android:layout_width="200dp" 20 android:layout_height="wrap_content" 21 android:text="左菜单二" /> 22 </LinearLayout> 23 24 <LinearLayout 25 android:id="@+id/right_menu" 26 android:layout_width="match_parent" 27 android:layout_height="match_parent" 28 android:background="#666" 29 android:orientation="horizontal" > 30 <LinearLayout 31 android:layout_width="wrap_content" 32 android:layout_height="wrap_content" 33 android:layout_weight="1" 34 android:orientation="vertical" > 35 </LinearLayout> 36 <LinearLayout 37 android:layout_width="200dp" 38 android:layout_height="wrap_content" 39 android:orientation="vertical" > 40 <Button 41 android:layout_width="match_parent" 42 android:layout_height="wrap_content" 43 android:text="右菜单一" /> 44 <Button 45 android:layout_width="match_parent" 46 android:layout_height="wrap_content" 47 android:text="右菜单二" /> 48 49 </LinearLayout> 50 51 </LinearLayout> 52 <grimbo.android.demo.slidingmenu.ScrollLayout 53 android:layout_width="match_parent" 54 android:orientation="vertical" 55 android:id="@+id/my_scrollLayout" 56 android:layout_height="match_parent"> 57 <LinearLayout 58 android:layout_width="match_parent" 59 android:layout_height="match_parent" 60 android:background="#aaa" 61 android:orientation="vertical" > 62 63 64 <Button 65 android:id="@+id/button1" 66 android:layout_width="match_parent" 67 android:layout_height="wrap_content" 68 android:text="Button Button" /> 69 70 <Spinner 71 android:id="@+id/spinner1" 72 android:layout_width="match_parent" 73 android:layout_height="wrap_content" /> 74 75 <SeekBar 76 android:id="@+id/seekBar1" 77 android:layout_width="match_parent" 78 android:layout_height="wrap_content" /> 79 80 </LinearLayout> 81 82 </grimbo.android.demo.slidingmenu.ScrollLayout> 83 84 </FrameLayout>
最后,在activity里面的onCreate函数里加上:
View Code
1 setContentView(R.layout.my_layout); 2 3 final LinearLayout left=(LinearLayout)findViewById(R.id.left_menu); 4 final LinearLayout right=(LinearLayout)findViewById(R.id.right_menu); 5 right.setVisibility(View.GONE); 6 left.setVisibility(View.VISIBLE); 7 8 ScrollLayout mScrollLayout=(ScrollLayout)findViewById(R.id.my_scrollLayout); 9 mScrollLayout.setScrollSideChangedListener(new OnScrollSideChangedListener() { 10 @Override 11 public void onScrollSideChanged(View v, boolean leftSide) { 12 if(leftSide) 13 { 14 right.setVisibility(View.GONE); 15 left.setVisibility(View.VISIBLE); 16 }else 17 { 18 right.setVisibility(View.VISIBLE); 19 left.setVisibility(View.GONE); 20 } 21 } 22 });
大功告成!左右滑动是弹性效果也一并实现~