Android实现卫星菜单效果

前言

最近需求中，需要实现 卫星菜单的需求，最终通过自定义View和动画属性来实现，具体功能如下：

1.自定义View

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.AnimationUtils;
import android.view.animation.RotateAnimation;
import android.view.animation.TranslateAnimation;
import com.xinrui.headsettest.R;
/**
 * 卫星菜单
 */
public class SatelliteView extends ViewGroup {
  private View mBtnView;
  private MenuStatus mBStatus = MenuStatus.STATUS_CLOSE;
  private onSubItemClickListener onListener;

  public enum MenuStatus {
    STATUS_OPEN, STATUS_CLOSE
  }

  //子菜单点击接口
  public interface onSubItemClickListener {
    void onItemClick(View view, int position);
  }

  public void setOnSubItemClickListener(onSubItemClickListener mListener) {
    this.onListener = mListener;
  }

  public SatelliteView(Context context) {
    super(context);
//    this(context, null);
  }

  public SatelliteView(Context context, AttributeSet attrs) {
    super(context, attrs);
//    this(context, attrs, 0);
  }

  public SatelliteView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    int count = getChildCount();
    for (int i = 0; i < count; i++) {
      measureChild(getChildAt(i), widthMeasureSpec, heightMeasureSpec);
    }
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  }

  //添加布局，就是所要显示的控件View
  @Override
  protected void onLayout(boolean changed, int l, int t, int r, int b) {
    if (changed) {
      //主菜单按钮
      onMainButton();
      //子菜单按钮
      onSubItemButton();
    }
  }

  //获取主菜单按钮
  private void onMainButton() {
    mBtnView = getChildAt(0);
    mBtnView.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        //主菜单动画旋转动画
        Animation rotateAnim = AnimationUtils.loadAnimation(getContext(), R.anim.satellite_anim);
        mBtnView.startAnimation(rotateAnim);
        //子菜单动画
        subItemAnim();
      }
    });
    int l, t, r = 0, b = 0;
    int mWidth = mBtnView.getMeasuredWidth();
    int mHeight = mBtnView.getMeasuredHeight();
    l = getMeasuredWidth() - mWidth;
    t = getMeasuredHeight() - mHeight;
    mBtnView.layout(l, t, getMeasuredWidth(), getMeasuredHeight());
  }

  //获取子菜单按钮
  private void onSubItemButton() {
    int count = getChildCount();
    for (int i = 0; i < count - 1; i++) {
      View childView = getChildAt(i + 1);

      //开始时不呈现子菜单
      childView.setVisibility(View.GONE);

      int radius = 350;
      int cl, ct, cr, cb;

      cr = (int) (radius * Math.sin(Math.PI / 2 / (count - 2) * i));
      cb = (int) (radius * Math.cos(Math.PI / 2 / (count - 2) * i));

      int cWidth = childView.getMeasuredWidth();
      int cHeight = childView.getMeasuredHeight();

      cl = getMeasuredWidth() - cWidth - cr;
      ct = getMeasuredHeight() - cHeight - cb;

      //layout(l,t,r,b);前两参数决定位置，后两参数决定大小
      //参数(1,t)为View控件的左上角坐标
      // (r-l,b-t)为View控件大小,r-l为控件宽度,b-t为控件高度
      childView.layout(cl, ct, getMeasuredWidth() - cr, getMeasuredHeight() - cb);
    }
  }

  //子菜单散开回笼动画
  public void subItemAnim() {
    int count = getChildCount();
    for (int i = 0; i < count - 1; i++) {
      final View childView = getChildAt(i + 1);

      //点击主菜单后，子菜单就立刻呈现，否则后面的动画无法完成
      childView.setVisibility(VISIBLE);

      int radius = 350;
      int l, t, r, d;

      r = (int) (radius * Math.sin(Math.PI / 2 / (count - 2) * i));
      d = (int) (radius * Math.cos(Math.PI / 2 / (count - 2) * i));

//      int cWidth = cView.getMeasuredWidth();
//      int cHeight = cView.getMeasuredHeight();
//
//      l = getMeasuredWidth() - cWidth - r;
//      t = getMeasuredHeight() - cHeight - d;

      AnimationSet mAnimationSet = new AnimationSet(true);
      Animation mTranAnimation = null;
      if (mBStatus == MenuStatus.STATUS_CLOSE) {
        //散开动画
        mTranAnimation = new TranslateAnimation(r, 0, d, 0);
        childView.setClickable(true);
        childView.setFocusable(true);
      } else {
        //回笼动画
        mTranAnimation = new TranslateAnimation(0, r, 0, d);
        childView.setClickable(false);
        childView.setFocusable(false);
      }
      mTranAnimation.setDuration(300);
//      tranAnim.setFillAfter(true); //让最后一帧的动画不消失
      mTranAnimation.setStartOffset(100 * i / count);
      mTranAnimation.setAnimationListener(new Animation.AnimationListener() {
        @Override
        public void onAnimationStart(Animation animation) {

        }

        @Override
        public void onAnimationEnd(Animation animation) {
          if (mBStatus == MenuStatus.STATUS_CLOSE) {
            childView.setVisibility(GONE);
          }
        }

        @Override
        public void onAnimationRepeat(Animation animation) {

        }
      });

      Animation rotateAnim = new RotateAnimation(
          0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
      rotateAnim.setDuration(300);
//      rotateAnim.setFillAfter(false);

      mAnimationSet.addAnimation(rotateAnim);
      mAnimationSet.addAnimation(mTranAnimation);
      childView.startAnimation(mAnimationSet);

      //散开后子菜单的点击监听事件
      final int pos = i + 1;
      childView.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
          if (onListener != null) {
            onListener.onItemClick(childView, pos);
          }
          //散开后点击子菜单动画
          subItemClickAnim(pos - 1);
          changStatus();
        }
      });
    }
    changStatus();
  }

  //监听子菜单状态改变
  private void changStatus() {
    mBStatus = (mBStatus == MenuStatus.STATUS_CLOSE ? MenuStatus.STATUS_OPEN : MenuStatus.STATUS_CLOSE);
  }

  //散开后点击子菜单动画
  private void subItemClickAnim(int pos) {
    int count = getChildCount();
    for (int i = 0;i<count-1;i++) {
      View mChildView = getChildAt(i+1);
      if(i == pos) {
        //变大，变透明
        mChildView.startAnimation(toBig());
      }
      else {
        //变小，变透明
        mChildView.startAnimation(toSmall());
      }
      mChildView.setClickable(false);
      mChildView.setFocusable(false);
    }
  }

  //变大，变透明
  private Animation toBig(){
    Animation big = AnimationUtils.loadAnimation(getContext(), R.anim.bigalpha);
    return big;
  }

  //变小，变透明
  private Animation toSmall(){
    Animation small = AnimationUtils.loadAnimation(getContext(),R.anim.smallalpha);
    return small;
  }

  //给ListView调用
  public boolean isOpen() {
    return mBStatus == MenuStatus.STATUS_OPEN;
  }
}

2.SatelliteActivity

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AbsListView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

import com.xinrui.headsettest.arc.SatelliteView;

import java.util.ArrayList;
import java.util.List;

public class SatelliteActivity extends Activity {
  private SatelliteView mSatelliteView;
  private ListView mListView;
  private List<String> mData;
  private ArrayAdapter mAdapter;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.satellite_layout);

    mSatelliteView = (SatelliteView) findViewById(R.id.view_arc);
    mSatelliteView.setOnSubItemClickListener(new SatelliteView.onSubItemClickListener() {
      @Override
      public void onItemClick(View view, int position) {
        Toast.makeText(SatelliteActivity.this, "position" + position, Toast.LENGTH_SHORT).show();
      }
    });

    initListView();
  }

  private void initListView() {
    mListView = (ListView) findViewById(R.id.listview);
    mData = new ArrayList<String>();
    for (int i = 'A'; i <= 'z'; i++) {
      mData.add((char) i + "");
    }
    mAdapter = new ArrayAdapter<String>(
        SatelliteActivity.this, android.R.layout.simple_list_item_1, mData);
    mListView.setAdapter(mAdapter);

    mListView.setOnScrollListener(new AbsListView.OnScrollListener() {
      @Override
      public void onScrollStateChanged(AbsListView view, int scrollState) {

      }

      @Override
      public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        if (mSatelliteView.isOpen()) {
          mSatelliteView.subItemAnim();
        }
      }
    });
  }
}

3.satellite_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

  <ListView
    android:id="@+id/listview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

  <com.xinrui.headsettest.arc.SatelliteView
    android:id="@+id/view_arc"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RelativeLayout
      android:layout_width="wrap_content"
      android:layout_height="wrap_content">

      <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:src="@drawable/menu" />
    </RelativeLayout>

    <ImageView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/camera" />

    <ImageView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/chat" />

    <ImageView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/contacts" />

    <ImageView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/music" />

    <ImageView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/moon" />

    <ImageView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/location" />
  </com.xinrui.headsettest.arc.SatelliteView>
</RelativeLayout>

4.anim动画 在res 新建anim文件夹

satellite_anim.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
  <rotate
    android:duration="300"
    android:fromDegrees="0"
    android:toDegrees="360"
    android:pivotX="50%"
    android:pivotY="50%"/>
</set>

bigalpha.xml

<!--android:fillAfter="true"得加，取动画结束后的最后一帧-->
<set xmlns:android="http://schemas.android.com/apk/res/android"
  android:fillAfter="true">
  <alpha
    android:duration="200"
    android:fromAlpha="1"
    android:toAlpha="0"/>
  <scale
    android:duration="200"
    android:fromXScale="1"
    android:fromYScale="1"
    android:toXScale="3"
    android:toYScale="3"
    android:pivotX="50%"
    android:pivotY="50%" />
</set>

smallalpha.xml

<!--android:fillAfter="true"得加，取动画结束后的最后一帧-->
<set xmlns:android="http://schemas.android.com/apk/res/android"
  android:fillAfter="true">
  <alpha
    android:duration="200"
    android:fromAlpha="1"
    android:toAlpha="0"/>
  <scale
    android:duration="200"
    android:fromXScale="1"
    android:fromYScale="1"
    android:toXScale="0"
    android:toYScale="0"
    android:pivotX="50%"
    android:pivotY="50%" />
</set>

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