利用DrawerLayout和触摸事件分发来实现抽屉侧滑业务

来源：互联网发布：淘宝导航条自定义图片编辑：程序博客网时间：2024/05/20 23:31

效果展示
这里写图片描述

还是看代码实在，直接上菜了。
1.MainActivity的代码：

public class MainActivity extends AppCompatActivity implements    MyDraweLayout.GetPositionCallback {        private List<ImageView> imageList;        private ViewPager viewPager;        private MyAdapter adapter;        private MyDraweLayout myDraweLayout;        private int currentPosition;        @Override        protected void onCreate (Bundle savedInstanceState){        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        viewPager = (ViewPager) findViewById(R.id.viewpager);        myDraweLayout = (MyDraweLayout) findViewById(R.id.mydrawelayout);        initdata();        adapter = new MyAdapter(this, imageList);         myDraweLayout.setCallback(this);        viewPager.setAdapter(adapter);            viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {                @Override                public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {                }                @Override                public void onPageSelected(int position) {                    currentPosition=position;                }                @Override                public void onPageScrollStateChanged(int state) {                }            });    }    private void initdata() {        imageList = new ArrayList<ImageView>();        ImageView imageView = new ImageView(this);        imageView.setImageResource(R.mipmap.ic_launcher);        imageView.setScaleType(ImageView.ScaleType.FIT_XY);        imageList.add(imageView);        imageView = new ImageView(this);        imageView.setImageResource(R.mipmap.ic_launcher);        imageView.setScaleType(ImageView.ScaleType.FIT_XY);        imageList.add(imageView);        imageView = new ImageView(this);        imageView.setImageResource(R.mipmap.ic_launcher);        imageView.setScaleType(ImageView.ScaleType.FIT_XY);        imageList.add(imageView);        imageView = new ImageView(this);        imageView.setImageResource(R.mipmap.ic_launcher);        imageView.setScaleType(ImageView.ScaleType.FIT_XY);        imageList.add(imageView);    }    @Override    public int position() {        return currentPosition;//TODO  通过接口回调把当前位置传到MyDraweLayout中    }}

2.MyDraweLayout类中的代码：

public class MyDraweLayout extends DrawerLayout {    public MyDraweLayout(Context context) {        super(context);    }    public MyDraweLayout(Context context, AttributeSet attrs) {        super(context, attrs);    }    public MyDraweLayout(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);    }    //TODO　事件拦截    @Override    public boolean onInterceptTouchEvent(MotionEvent ev) {        //Todo 获得当前位置，进行判断        if(callback.position()==0){            return  super.onInterceptTouchEvent(ev);        }else {            return false;        }    }    public  interface  GetPositionCallback{        int position();    }  private GetPositionCallback callback;   public void setCallback(GetPositionCallback callback){       this.callback = callback;    }}

3.适配器的代码;

public class MyAdapter extends PagerAdapter {    private final List<ImageView> imageList;    private final Context contex;    public MyAdapter(Context context, List<ImageView> imageList) {    this.contex=context;        this.imageList = imageList;    }    @Override    public int getCount() {        return imageList.size();    }    @Override    public boolean isViewFromObject(View view, Object object) {        return view==object;    }    @Override    public Object instantiateItem(ViewGroup container, int position) {        ImageView imageView = imageList.get(position);        container.addView(imageView);        return imageView;    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        //super.destroyItem(container, position, object);这行代码记得删除，不然滑到Viewpager的时候会闪退哦        container.removeView(imageList.get(position));    }}

4.xml布局：

<?xml version="1.0" encoding="utf-8"?><com.example.a43_drawelayoutandviewpager.MyDraweLayout    android:id="@+id/mydrawelayout"    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"><RelativeLayout    android:layout_width="match_parent"    android:layout_height="match_parent">    <android.support.v4.view.ViewPager        android:layout_width="match_parent"        android:layout_height="250dp"        android:id="@+id/viewpager"/>    </RelativeLayout>    <ImageView       android:background="@mipmap/ic_launcher"        android:layout_width="300dp"        android:layout_gravity = "start"        android:layout_height="match_parent"        android:layout_below="@+id/viewpager"     /></com.example.a43_drawelayoutandviewpager.MyDraweLayout>

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