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代码分析Android实现侧滑菜单

时间:2021-04-08 15:44     来源/作者:Android开发网

Android 侧滑菜单的实现,参考网上的代码,实现侧滑菜单。最重要的是这个动画类UgcAnimations,如何使用动画类来侧滑的封装FlipperLayout。

1、实现效果

代码分析Android实现侧滑菜单

2、动画类UgcAnimations

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package com.mmsx.base;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup.MarginLayoutParams;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.AnticipateInterpolator;
import android.view.animation.OvershootInterpolator;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.RelativeLayout;
 
/**
 * Path动画类
 *
 */
public class UgcAnimations {
  private static int xOffset = 15;
  private static int yOffset = -13;
 
  public static void initOffset(Context context) {
    xOffset = (int) (15 * context.getResources().getDisplayMetrics().density);
    yOffset = -(int) (13 * context.getResources().getDisplayMetrics().density);
  }
 
  public static Animation getRotateAnimation(float fromDegrees,
      float toDegrees, long durationMillis) {
    RotateAnimation rotate = new RotateAnimation(fromDegrees, toDegrees,
        Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
        0.5f);
    rotate.setDuration(durationMillis);
    rotate.setFillAfter(true);
    return rotate;
  }
 
  public static Animation getAlphaAnimation(float fromAlpha, float toAlpha,
      long durationMillis) {
    AlphaAnimation alpha = new AlphaAnimation(fromAlpha, toAlpha);
    alpha.setDuration(durationMillis);
    alpha.setFillAfter(true);
    return alpha;
  }
 
  public static Animation getScaleAnimation(long durationMillis) {
    ScaleAnimation scale = new ScaleAnimation(1.0f, 1.5f, 1.0f, 1.5f,
        Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
        0.5f);
    scale.setDuration(durationMillis);
    return scale;
  }
 
  public static Animation getTranslateAnimation(float fromXDelta,
      float toXDelta, float fromYDelta, float toYDelta,
      long durationMillis) {
    TranslateAnimation translate = new TranslateAnimation(fromXDelta,
        toXDelta, fromYDelta, toYDelta);
    translate.setDuration(durationMillis);
    translate.setFillAfter(true);
    return translate;
  }
 
  public static void startOpenAnimation(RelativeLayout relativeLayout,
      ImageView background, ImageView menu, long durationMillis) {
    background.setVisibility(View.VISIBLE);
    relativeLayout.setVisibility(View.VISIBLE);
    background.startAnimation(getAlphaAnimation(0f, 1f, durationMillis));
    menu.startAnimation(getRotateAnimation(0, 90, durationMillis));
    for (int i = 0; i < relativeLayout.getChildCount(); i++) {
      ImageView imageView = (ImageView) relativeLayout.getChildAt(i);
      imageView.setVisibility(View.VISIBLE);
      MarginLayoutParams params = (MarginLayoutParams) imageView
          .getLayoutParams();
      AnimationSet set = new AnimationSet(true);
      set.addAnimation(getRotateAnimation(-270, 0, durationMillis));
      set.addAnimation(getAlphaAnimation(0.5f, 1.0f, durationMillis));
      set.addAnimation(getTranslateAnimation(
          -params.leftMargin + xOffset, 0f, params.bottomMargin
              + yOffset, 0f, durationMillis));
      set.setFillAfter(true);
      set.setDuration(durationMillis);
      set.setStartOffset((i * 100)
          / (-1 + relativeLayout.getChildCount()));
      set.setInterpolator(new OvershootInterpolator(1f));
      imageView.startAnimation(set);
    }
  }
  public static void startCloseAnimation(final RelativeLayout relativeLayout,
      final ImageView background, ImageView menu, long durationMillis) {
    background.startAnimation(getAlphaAnimation(1f, 0f, durationMillis));
    menu.startAnimation(getRotateAnimation(90, 0, durationMillis));
    for (int i = 0; i < relativeLayout.getChildCount(); i++) {
      final ImageView imageView = (ImageView) relativeLayout
          .getChildAt(i);
      MarginLayoutParams params = (MarginLayoutParams) imageView
          .getLayoutParams();
      AnimationSet set = new AnimationSet(true);
      set.addAnimation(getRotateAnimation(0, -270, durationMillis));
      set.addAnimation(getAlphaAnimation(1.0f, 0.5f, durationMillis));
      set.addAnimation(getTranslateAnimation(0f, -params.leftMargin
          + xOffset, 0f, params.bottomMargin + yOffset,
          durationMillis));
      set.setFillAfter(true);
      set.setDuration(durationMillis);
      set.setStartOffset(((relativeLayout.getChildCount() - i) * 100)
          / (-1 + relativeLayout.getChildCount()));
      set.setInterpolator(new AnticipateInterpolator(1f));
      set.setAnimationListener(new Animation.AnimationListener() {
        public void onAnimationStart(Animation arg0) {
        }
        public void onAnimationRepeat(Animation arg0) {
        }
        public void onAnimationEnd(Animation arg0) {
          relativeLayout.setVisibility(View.GONE);
          background.setVisibility(View.GONE);
        }
      });
      imageView.startAnimation(set);
    }
  }
  public static Animation clickAnimation(long durationMillis) {
    AnimationSet set = new AnimationSet(true);
    set.addAnimation(getAlphaAnimation(1.0f, 0.3f, durationMillis));
    set.addAnimation(getScaleAnimation(durationMillis));
    set.setDuration(durationMillis);
    return set;
  }
}

3、封装使用动画类FlipperLayout

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package com.mmsx.base;
import android.content.Context;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.widget.Scroller;
 
/**
 * 自己重写的ViewGroup,用与滑动切换界面使用,代码不详解,慢点看的话应该能看懂的...
 */
public class FlipperLayout extends ViewGroup {
 
  private Scroller mScroller;
  private VelocityTracker mVelocityTracker;
  private int mWidth;
 
  public static final int SCREEN_STATE_CLOSE = 0;
  public static final int SCREEN_STATE_OPEN = 1;
  public static final int TOUCH_STATE_RESTART = 0;
  public static final int TOUCH_STATE_SCROLLING = 1;
  public static final int SCROLL_STATE_NO_ALLOW = 0;
  public static final int SCROLL_STATE_ALLOW = 1;
  private int mScreenState = 0;
  private int mTouchState = 0;
  private int mScrollState = 0;
  private int mVelocityValue = 0;
  private boolean mOnClick = false;
  private onUgcDismissListener mOnUgcDismissListener;
  private onUgcShowListener mOnUgcShowListener;
 
  public FlipperLayout(Context context) {
    super(context);
    mScroller = new Scroller(context);
    mWidth = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
        54, getResources().getDisplayMetrics());
 
  }
 
  public FlipperLayout(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }
 
  public FlipperLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
  }
 
  protected void onLayout(boolean changed, int l, int t, int r, int b) {
    for (int i = 0; i < getChildCount(); i++) {
      View child = getChildAt(i);
      int height = child.getMeasuredHeight();
      int width = child.getMeasuredWidth();
      child.layout(0, 0, width, height);
    }
  }
 
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    int width = MeasureSpec.getSize(widthMeasureSpec);
    int height = MeasureSpec.getSize(heightMeasureSpec);
    setMeasuredDimension(width, height);
    for (int i = 0; i < getChildCount(); i++) {
      getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec);
    }
  }
 
  public boolean dispatchTouchEvent(MotionEvent ev) {
    obtainVelocityTracker(ev);
    switch (ev.getAction()) {
    case MotionEvent.ACTION_DOWN:
      mTouchState = mScroller.isFinished() ? TOUCH_STATE_RESTART
          : TOUCH_STATE_SCROLLING;
      if (mTouchState == TOUCH_STATE_RESTART) {
        int x = (int) ev.getX();
        int screenWidth = getWidth();
        if (x <= mWidth && mScreenState == SCREEN_STATE_CLOSE
            && mTouchState == TOUCH_STATE_RESTART
            || x >= screenWidth - mWidth
            && mScreenState == SCREEN_STATE_OPEN
            && mTouchState == TOUCH_STATE_RESTART) {
          if (mScreenState == SCREEN_STATE_OPEN) {
            mOnClick = true;
          }
          mScrollState = SCROLL_STATE_ALLOW;
        } else {
          mOnClick = false;
          mScrollState = SCROLL_STATE_NO_ALLOW;
        }
      } else {
        return false;
      }
      break;
    case MotionEvent.ACTION_MOVE:
      mVelocityTracker.computeCurrentVelocity(1000,
          ViewConfiguration.getMaximumFlingVelocity());
      if (mScrollState == SCROLL_STATE_ALLOW
          && getWidth() - (int) ev.getX() < mWidth) {
        return true;
      }
      break;
    case MotionEvent.ACTION_UP:
      releaseVelocityTracker();
      if (mOnClick) {
        mOnClick = false;
        mScreenState = SCREEN_STATE_CLOSE;
        mScroller.startScroll(getChildAt(1).getScrollX(), 0,
            -getChildAt(1).getScrollX(), 0, 800);
        invalidate();
      }
      break;
    }
    return super.dispatchTouchEvent(ev);
  }
 
  public boolean onInterceptTouchEvent(MotionEvent ev) {
    obtainVelocityTracker(ev);
    switch (ev.getAction()) {
    case MotionEvent.ACTION_DOWN:
      mTouchState = mScroller.isFinished() ? TOUCH_STATE_RESTART
          : TOUCH_STATE_SCROLLING;
      if (mTouchState == TOUCH_STATE_SCROLLING) {
        return false;
      }
      break;
 
    case MotionEvent.ACTION_MOVE:
      mOnClick = false;
      mVelocityTracker.computeCurrentVelocity(1000,
          ViewConfiguration.getMaximumFlingVelocity());
      if (mScrollState == SCROLL_STATE_ALLOW
          && Math.abs(mVelocityTracker.getXVelocity()) > 200) {
        return true;
      }
      break;
 
    case MotionEvent.ACTION_UP:
      releaseVelocityTracker();
      if (mScrollState == SCROLL_STATE_ALLOW
          && mScreenState == SCREEN_STATE_OPEN) {
        return true;
      }
      break;
    }
    return super.onInterceptTouchEvent(ev);
  }
 
  public boolean onTouchEvent(MotionEvent event) {
    obtainVelocityTracker(event);
    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
      mTouchState = mScroller.isFinished() ? TOUCH_STATE_RESTART
          : TOUCH_STATE_SCROLLING;
      if (mTouchState == TOUCH_STATE_SCROLLING) {
        return false;
      }
      break;
 
    case MotionEvent.ACTION_MOVE:
      mVelocityTracker.computeCurrentVelocity(1000,
          ViewConfiguration.getMaximumFlingVelocity());
      mVelocityValue = (int) mVelocityTracker.getXVelocity();
      getChildAt(1).scrollTo(-(int) event.getX(), 0);
      break;
 
    case MotionEvent.ACTION_UP:
      if (mScrollState == SCROLL_STATE_ALLOW) {
        if (mVelocityValue > 2000) {
          mScreenState = SCREEN_STATE_OPEN;
          mScroller
              .startScroll(
                  getChildAt(1).getScrollX(),
                  0,
                  -(getWidth()
                      - Math.abs(getChildAt(1)
                          .getScrollX()) -
 
                  mWidth), 0, 250);
          invalidate();
 
        } else if (mVelocityValue < -2000) {
          mScreenState = SCREEN_STATE_CLOSE;
          mScroller.startScroll(getChildAt(1).getScrollX(), 0,
              -getChildAt(1).getScrollX(), 0, 250);
          invalidate();
        } else if (event.getX() < getWidth() / 2) {
          mScreenState = SCREEN_STATE_CLOSE;
          mScroller.startScroll(getChildAt(1).getScrollX(), 0,
              -getChildAt(1).getScrollX(), 0, 800);
          invalidate();
        } else {
          mScreenState = SCREEN_STATE_OPEN;
          mScroller
              .startScroll(
                  getChildAt(1).getScrollX(),
                  0,
                  -(getWidth()
                      - Math.abs(getChildAt(1)
                          .getScrollX()) -
 
                  mWidth), 0, 800);
          invalidate();
        }
      }
      break;
    }
    return super.onTouchEvent(event);
  }
 
  public void open() {
    mTouchState = mScroller.isFinished() ? TOUCH_STATE_RESTART
        : TOUCH_STATE_SCROLLING;
    if (mTouchState == TOUCH_STATE_RESTART) {
      mScreenState = SCREEN_STATE_OPEN;
      mScroller.startScroll(getChildAt(1).getScrollX(), 0, -(getWidth()
          - Math.abs(getChildAt(1).getScrollX()) -
 
      mWidth), 0, 800);
      invalidate();
    }
  }
 
  //关闭当前的侧滑菜单,用view打开点击事件的页面
  public void close(View view) {
    mScreenState = SCREEN_STATE_CLOSE;
    mScroller.startScroll(getChildAt(1).getScrollX(), 0, -getChildAt(1)
        .getScrollX(), 0, 800);
    invalidate();
    setContentView(view);
  }
 
  public void computeScroll() {
    super.computeScroll();
    if (mScroller.computeScrollOffset()) {
      getChildAt(1).scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
      postInvalidate();
    } else {
      if (mScreenState == SCREEN_STATE_OPEN) {
        if (mOnUgcDismissListener != null) {
          mOnUgcDismissListener.dismiss();
        }
      } else if (mScreenState == SCREEN_STATE_CLOSE) {
        if (mOnUgcShowListener != null) {
          mOnUgcShowListener.show();
        }
      }
    }
  }
  private void obtainVelocityTracker(MotionEvent event) {
    if (mVelocityTracker == null) {
      mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(event);
  }
  private void releaseVelocityTracker() {
    if (mVelocityTracker != null) {
      mVelocityTracker.recycle();
      mVelocityTracker = null;
    }
  }
  public int getScreenState() {
    return mScreenState;
  }
  public void setContentView(View view) {
    removeViewAt(1);
    addView(view, 1, getLayoutParams());
  }
  public interface OnOpenListener {
    public abstract void open();
  }
  public interface OnCloseListener {
    public abstract void close();
  }
  public interface onUgcDismissListener {
    public abstract void dismiss();
  }
  public interface onUgcShowListener {
    public abstract void show();
  }
  public void setOnUgcDismissListener(
      onUgcDismissListener onUgcDismissListener) {
    mOnUgcDismissListener = onUgcDismissListener;
  }
  public void setOnUgcShowListener(onUgcShowListener onUgcShowListener) {
    mOnUgcShowListener = onUgcShowListener;
  }
}

4、主界面MainActivity

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package com.mmsx.activity; 
import com.mmsx.activity.SideslipMenu.onChangeViewListener;
import com.mmsx.activity.SideslipOther.onDataListener;
import com.mmsx.base.FlipperLayout;
import com.mmsx.base.FlipperLayout.OnOpenListener;
import com.mmsx.base.ViewUtil;
import android.os.Bundle;
import android.app.Activity;
import android.view.ViewGroup.LayoutParams;
import android.widget.Toast;
 
public class MainActivity extends Activity implements OnOpenListener{
 
  //侧滑主要控制类,设置跟布局
  private FlipperLayout mRoot;
  //侧滑的默认界面,主界面
  private SideslipHome mHome;
  //侧滑的菜单,进行选择的
  private SideslipMenu mSideslipMenu;
  //其他菜单列表选择的效果
  private SideslipOther mOther;
  //退出时间间隔变量
  private long mExitTime;
  //时间间隔2s
  private static final int INTERVAL = 2000;
  //侧滑菜单选中的item
  private int mViewPosition;
  //侧滑传递的标题
  private String mstrTitle;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
     //创建容器,并设置全屏大小
    mRoot = new FlipperLayout(this);
    //布局的参数
    LayoutParams params = new LayoutParams(LayoutParams.FILL_PARENT,
        LayoutParams.FILL_PARENT);
    mRoot.setLayoutParams(params);
    //创建菜单界面和内容首页界面,并添加到容器中,用于初始显示
    mHome = new SideslipHome(this, this);
    mSideslipMenu = new SideslipMenu(this);
    mRoot.addView(mSideslipMenu.getView(), params);
    mRoot.addView(mHome.getView(), params);
    //设置跟布局
    setContentView(mRoot);
    //设置监听
    setListener();
  }
 
  //设置监听
  private void setListener() {
    mHome.setOnOpenListener(this);
     //监听菜单界面切换显示内容(onChangeViewListener接口在SideslipMenu中定义)
    mSideslipMenu.setOnChangeViewListener(new onChangeViewListener() {
       
      public void onChangeView(int arg0) {
        mViewPosition = arg0;
        mOther = new SideslipOther(MainActivity.this);
        switch (arg0) {
        case ViewUtil.HOME:
          mRoot.close(mHome.getView());
          break;
        case ViewUtil.MESSAGE:
          mstrTitle = "消息";
          //设置数据接口监听
          mOther.setDataTitle(new DataTitle());
          mRoot.close(mOther.getView());
          break;
        case ViewUtil.FRIENDS:
          mstrTitle = "好友";
          mOther.setDataTitle(new DataTitle());
          mRoot.close(mOther.getView());
          break;
        case ViewUtil.PHOTO:
          mstrTitle = "照片";
          mOther.setDataTitle(new DataTitle());
          mRoot.close(mOther.getView());
          break;
        case ViewUtil.VIEWED:
          mstrTitle = "转帖";
          mOther.setDataTitle(new DataTitle());
          mRoot.close(mOther.getView());
          break;
        case ViewUtil.GIFTS:
          mstrTitle = "礼物";
          mOther.setDataTitle(new DataTitle());
          mRoot.close(mOther.getView());
          break;
        case ViewUtil.RECOMMEND:
          mstrTitle = "游戏";
          mOther.setDataTitle(new DataTitle());
          mRoot.close(mOther.getView());
          break;
        case ViewUtil.LBS:
          mstrTitle = "附近 ";
          mOther.setDataTitle(new DataTitle());
          mRoot.close(mOther.getView());
          break;
        default:
          break;
        }
      }
    });
  }
   
  //传递数据到侧滑选中的页面
  private class DataTitle implements onDataListener{
    @Override
    public String getDataTitle() {
      return mstrTitle;
    }
     
  }
 
  @Override
  public void open() {
    if (mRoot.getScreenState() == FlipperLayout.SCREEN_STATE_CLOSE) {
      mRoot.open();
    }
  }
   
  /**
   * 返回键监听
   */
  public void onBackPressed() {
    /**
     * 如果界面的path菜单没有关闭时,先将path菜单关闭,否则则判断两次返回时间间隔,小于两秒则退出程序
     */
    if (mRoot.getScreenState() == FlipperLayout.SCREEN_STATE_OPEN) {
      if (mSideslipMenu.getUgcIsShowing()) {
        mSideslipMenu.closeUgc();
      } else {
        exit();
      }
    } else {
      switch (mViewPosition) {
      case ViewUtil.HOME:
        if (mHome.getUgcIsShowing()) {
          mHome.closeUgc();
        } else {
          exit();
        }
        break;
      default:
        exit();
        break;
      }
 
    }
 
  }  
  /**
   * 判断两次返回时间间隔,小于两秒则退出程序
   */
  private void exit() {
    if (System.currentTimeMillis() - mExitTime > INTERVAL) {
      Toast.makeText(this, "再按一次返回键,可直接退出程序", Toast.LENGTH_SHORT).show();
      mExitTime = System.currentTimeMillis();
    } else {
      finish();
      android.os.Process.killProcess(android.os.Process.myPid());
      System.exit(0);
    }
  }
}

5、SideslipHome

?
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package com.mmsx.activity;
import com.mmsx.base.FlipperLayout.OnOpenListener;
 
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.TextView;
 
public class SideslipHome {
  private Context mContext;
  private Activity mActivity;
  private View mHomeView;
  private boolean mUgcIsShowing = false
  private OnOpenListener mOnOpenListener;
  public SideslipHome(Context context, Activity activity) {
    mContext = context;
    mActivity = activity;
    mHomeView = LayoutInflater.from(context).inflate(R.layout.sideslip_home, null);
     
    initUI();
  }
 
  private void initUI() {
    TextView ivTitleName = (TextView)mHomeView.findViewById(R.id.ivTitleName); 
    ivTitleName.setText("主页动态");
     
  }
   
  public void setOnOpenListener(OnOpenListener onOpenListener) {
    mOnOpenListener = onOpenListener;
  }
 
  public View getView() {
    return mHomeView;
  }
   
  /**
   * 获取Path菜单显示状态
   */
  public boolean getUgcIsShowing() {
    return mUgcIsShowing;
  }
 
  /**
   * 关闭Path菜单
   */
  public void closeUgc() {
    mUgcIsShowing = false;
  }
 
}

好了,以上就是本文的全部叙述,希望大家喜欢。

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