个人感觉网易的客户端比较前卫,有很多新鲜的东西,有时候模仿这些好的客户端能学到很多东西
开始今天的主要课题,下面是网易客户端抽屉模式实现的效果
其实有个Drawerlayout这个布局,你得问题就已经解决掉一大半了,Drawerlayout布局本身就提供了左划和右划的功能
先上代码,然后慢慢解答,看完这篇博客你就知道Drawerlayout怎么用了
首先上逐步局文件代码
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/drawerlayout" android:layout_width="match_parent" android:layout_height="match_parent" > <FrameLayout android:id="@+id/fragment_layout" android:layout_width="match_parent" android:layout_height="match_parent" > </FrameLayout> <RelativeLayout android:id="@+id/left" android:layout_width="200dp" android:layout_height="match_parent" android:layout_gravity="left" android:background="@android:color/white"> <ListView android:id="@+id/left_listview" android:layout_width="match_parent" android:layout_height="match_parent" > </ListView> </RelativeLayout> <RelativeLayout android:id="@+id/right" android:layout_width="260dp" android:layout_height="match_parent" android:layout_gravity="right" android:background="@android:color/holo_green_light"> <TextView android:id="@+id/right_textview" android:layout_width="match_parent" android:layout_height="match_parent" android:text="个人登陆页面" /> </RelativeLayout> </android.support.v4.widget.DrawerLayout>
Drawerlayout是Androidv4包里自带的,既然是自带的那么直接拿来用就可以了,当然前提是你得工程里有v4包
下面解释上面的布局文件,让你懂得Drawerlayout用法,首先Drawerlayout支持左划和右划,那他是如何控制的呢?不居中告诉你,以上布局分为三部分,一般情况下,第一部分是主步局,第二部分是左划的布局,第三部分是右划的布局,其实这里的左向滑动和右向滑动是通过gravity控制,左划界面android:layout_gravity="left" 当然这里的left也可以用start代替,右划界面就理所当然的是android:layout_gravity="right" ,同样right也可以用end代替,其余的应该明白了吧!不懂留言,我认真为你解答
下面在贴一下主界面的代码,你看懂Drawerlayout用法其余的就很简单了,妈妈再也不懂担心你的学习了
package com.sdufe.thea.guo; import java.util.ArrayList; import java.util.List; import com.sdufe.thea.guo.adapter.ContentAdapter; import com.sdufe.thea.guo.model.ContentModel; import android.os.Bundle; import android.app.Activity; import android.support.v4.widget.DrawerLayout; import android.support.v4.widget.DrawerLayout.DrawerListener; import android.view.Menu; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.RelativeLayout; import android.widget.TextView; public class MainActivity extends Activity { private DrawerLayout drawerLayout; private RelativeLayout leftLayout; private RelativeLayout rightLayout; private List<ContentModel> list; private ContentAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); drawerLayout = (DrawerLayout) findViewById(R.id.drawerlayout); leftLayout=(RelativeLayout) findViewById(R.id.left); rightLayout=(RelativeLayout) findViewById(R.id.right); ListView listView=(ListView) leftLayout.findViewById(R.id.left_listview); initData(); adapter=new ContentAdapter(this, list); listView.setAdapter(adapter); } private void initData() { list=new ArrayList<ContentModel>(); list.add(new ContentModel(R.drawable.doctoradvice2, "新闻")); list.add(new ContentModel(R.drawable.infusion_selected, "订阅")); list.add(new ContentModel(R.drawable.mypatient_selected, "图片")); list.add(new ContentModel(R.drawable.mywork_selected, "视频")); list.add(new ContentModel(R.drawable.nursingcareplan2, "跟帖")); list.add(new ContentModel(R.drawable.personal_selected, "投票")); } }
ok,就是这么简单啦!
CSDN代码下载:http://download.csdn.net/detail/elinavampire/8195349
github代码下载:https://github.com/zimoguo/DrawerMode
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首先看Drawerlayout,他继承自ViewGroup,这里主要看一下它里面的方法,方便以后使用
/** * Listener for monitoring events about drawers. */ public interface DrawerListener { /** * Called when a drawer's position changes. * @param drawerView The child view that was moved * @param slideOffset The new offset of this drawer within its range, from 0-1 */ public void onDrawerSlide(View drawerView, float slideOffset); /** * Called when a drawer has settled in a completely open state. * The drawer is interactive at this point. * * @param drawerView Drawer view that is now open */ public void onDrawerOpened(View drawerView); /** * Called when a drawer has settled in a completely closed state. * * @param drawerView Drawer view that is now closed */ public void onDrawerClosed(View drawerView); /** * Called when the drawer motion state changes. The new state will * be one of {@link #STATE_IDLE}, {@link #STATE_DRAGGING} or {@link #STATE_SETTLING}. * * @param newState The new drawer motion state */ public void onDrawerStateChanged(int newState); }
上面主要是监听事件的接口,通常回调的时候回用到它,里面的方法有四个,分别是onDrawerSlide(View drawerView, float slideOffset);onDrawerOpened(View drawerView);onDrawerClosed(View drawerView);onDrawerStateChanged(int newState);
onDrawerSlide(View drawerView, float slideOffset)抽屉改变时使用
onDrawerOpened(View drawerView);打开抽屉
onDrawerClosed(View drawerView)关闭抽屉
onDrawerStateChanged(int newState);改变抽屉的状态
/** * Set a simple drawable used for the left or right shadow. * The drawable provided must have a nonzero intrinsic width. * * @param shadowDrawable Shadow drawable to use at the edge of a drawer * @param gravity Which drawer the shadow should apply to */ public void setDrawerShadow(Drawable shadowDrawable, int gravity) { /* * TODO Someone someday might want to set more complex drawables here. * They're probably nuts, but we might want to consider registering callbacks, * setting states, etc. properly. */ final int absGravity = GravityCompat.getAbsoluteGravity(gravity, ViewCompat.getLayoutDirection(this)); if ((absGravity & Gravity.LEFT) == Gravity.LEFT) { mShadowLeft = shadowDrawable; invalidate(); } if ((absGravity & Gravity.RIGHT) == Gravity.RIGHT) { mShadowRight = shadowDrawable; invalidate(); } }
上面这个方法是为了设置用于左或右阴影的简单可拉伸。所提供的可拉伸必须有一个非零固有宽度。
public void setScrimColor(int color) { mScrimColor = color; invalidate(); }
设置用于该掩盖的主要内容，而抽屉打开网眼织物的颜色。
public void setDrawerLockMode(int lockMode, int edgeGravity) { final int absGravity = GravityCompat.getAbsoluteGravity(edgeGravity, ViewCompat.getLayoutDirection(this)); if (absGravity == Gravity.LEFT) { mLockModeLeft = lockMode; } else if (absGravity == Gravity.RIGHT) { mLockModeRight = lockMode; } if (lockMode != LOCK_MODE_UNLOCKED) { // Cancel interaction in progress final ViewDragHelper helper = absGravity == Gravity.LEFT ? mLeftDragger : mRightDragger; helper.cancel(); } switch (lockMode) { case LOCK_MODE_LOCKED_OPEN: final View toOpen = findDrawerWithGravity(absGravity); if (toOpen != null) { openDrawer(toOpen); } break; case LOCK_MODE_LOCKED_CLOSED: final View toClose = findDrawerWithGravity(absGravity); if (toClose != null) { closeDrawer(toClose); } break; // default: do nothing } }
启用或禁用了所有的抽屉互动。
