利用DrawerLayout和触摸事件分发实现抽屉侧滑效果
本文实例为大家分享了DrawerLayout和触摸事件分发实现抽屉侧滑效果的具体代码,供大家参考,具体内容如下
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效果展示
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 ListimageList; 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 = 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 ListimageList; private final Context contex; public MyAdapter(Context context, List 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"?>
文章题目:利用DrawerLayout和触摸事件分发实现抽屉侧滑效果
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