DrawerLayout去除阴影，阴影点击不关闭抽屉,屏蔽触发相关view，抽屉侧滑关闭响应

本文详细介绍了一种定制化的侧滑菜单实现方案，通过重写DrawerLayout，实现了点击阴影区域时抽屉不关闭、仅点击侧边栏按钮才收起抽屉、禁止手势滑动控制抽屉等功能，同时确保主Activity的其他控件在抽屉打开状态下不可点击。

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1，点击阴影位置抽屉不关闭
2，只有点击侧边栏里面的按钮才会收起抽屉
3，禁止手势滑动划出和关闭抽屉功能
/**

mainActivty 的其他控件在抽屉打开的情况下不可以点击
*/

drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
//去除侧滑栏阴影
drawer.setScrimColor(Color.TRANSPARENT);
// 禁止手势滑动关闭和打开
drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);

    //返回键处理
@Override
public void onBackPressed() {
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
}

/**
* 当MainActivity 下方有列表的时候，滑动也会关闭抽屉次方法就是屏蔽这个的
* @param ev 动作
* @return 重写弗雷方法
*/
// 当抽屉打开时列表不可滑动
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_MOVE && drawer.isDrawerOpen(GravityCompat.START)) {
return true; // 禁止滑动
}
return super.dispatchTouchEvent(ev);
}

/**

自定义 DrawerLayout 重写onInterceptTouchEvent 当点击的时候，
判断点击位置是否位于相应的View内如果位于则响应点击事件

                            否则，响应事件传递下去至mainactivity

/
/*
* 判断点击位置是否位于相应的View内
* @param x x坐标
* @param y y坐标
* @return 返回当前view
*/
public View findTopChildUnder(int x, int y) {
final int childCount = getChildCount();
for (int i = childCount - 1; i >= 0; i–) {
final View child = getChildAt(i);
if (x >= child.getLeft() && x < child.getRight() &&
y >= child.getTop() && y < child.getBottom()) {
return child;
}
}
return null;
}

/**
 * 判断点击触摸点的View是否是ContentView(即是主页面的View)
 * @param child 子view
 * @return  boolean
 */
boolean isContentView(View child) {
    return ((LayoutParams) child.getLayoutParams()).gravity == Gravity.NO_GRAVITY;
}

/**
 * 判断点击触摸点的View是否是DrawerView(即是侧边栏的View)
 * @param child  子view
 * @return  boolean
 */
boolean isDrawerView(View child) {
    final int gravity = ((LayoutParams) child.getLayoutParams()).gravity;
    final int absGravity = GravityCompat.getAbsoluteGravity(gravity,
            ViewCompat.getLayoutDirection(child));
    if ((absGravity & Gravity.LEFT) != 0) {
        // This child is a left-edge drawer
        return true;
    }
    if ((absGravity & Gravity.RIGHT) != 0) {
        // This child is a right-edge drawer
        return true;
    }
    return false;
}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev){
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
final float x = ev.getX();
final float y = ev.getY();
final View touchedView = findTopChildUnder((int) x, (int) y);
if (touchedView != null && isContentView(touchedView)
&& this.isDrawerOpen(GravityCompat.START)) {
return false;
}
}
return super.onInterceptTouchEvent(ev);
}

下面贴出完整每个类及布局文件的源码：

MainActivity

`package com.demo.jack.testdrawerlayout;

import android.graphics.Color;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

/**

mainActivty 的其他控件在抽屉打开的情况下不可以点击
*/
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {

private Button btn1;

private Button btn2;

private TextView tv;

private DrawerLayout drawer;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.tv);
tv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!drawer.isDrawerOpen(GravityCompat.START)) {
Toast.makeText(MainActivity.this, “点击了TextView!!!”, Toast.LENGTH_SHORT).show();
}
if (!drawer.isDrawerOpen(GravityCompat.START)) {
drawer.openDrawer(GravityCompat.START);
}
}
});
btn1 = (Button) findViewById(R.id.btn1);
btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!drawer.isDrawerOpen(GravityCompat.START)) {
Toast.makeText(MainActivity.this, “点击了Button1”, Toast.LENGTH_SHORT).show();
}
}
});
```
 btn2 = (Button) findViewById(R.id.btn2);
 btn2.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View v) {
         if (!drawer.isDrawerOpen(GravityCompat.START)) {
             Toast.makeText(MainActivity.this, "点击了Button2------", Toast.LENGTH_SHORT).show();
         }
     }
 });

 Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
 setSupportActionBar(toolbar);
 drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
 drawer.setScrimColor(Color.TRANSPARENT);
 // 禁止手势滑动
 drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
         this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 drawer.setDrawerListener(toggle);
 toggle.syncState();

 NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
 navigationView.setNavigationItemSelectedListener(this);
```
}
//返回键处理
@Override
public void onBackPressed() {
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
```
 //noinspection SimplifiableIfStatement
 if (id == R.id.action_settings) {
     return true;
 }

 return super.onOptionsItemSelected(item);
```
}

@SuppressWarnings(“StatementWithEmptyBody”)
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
```
 if (id == R.id.nav_camera) {
     // Handle the camera action
 } else if (id == R.id.nav_gallery) {

 } else if (id == R.id.nav_slideshow) {

 } else if (id == R.id.nav_manage) {

 } else if (id == R.id.nav_share) {

 } else if (id == R.id.nav_send) {

 }
 //只有点击侧边栏里面的按钮 才会收起抽屉
 if (drawer.isDrawerOpen(GravityCompat.START)) {
     drawer.closeDrawer(GravityCompat.START);
 }
 Toast.makeText(MainActivity.this
         , "点击了侧边栏---->" + item.getTitle(), Toast.LENGTH_SHORT).show();
 return true;
```
}

/**
- 当MainActivity 下方有列表的时候，滑动也会关闭抽屉次方法就是屏蔽这个的
- @param ev 动作
- @return 重写弗雷方法
  */
  // 当抽屉打开时列表不可滑动
  @Override
  public boolean dispatchTouchEvent(MotionEvent ev) {
  if (ev.getAction() == MotionEvent.ACTION_MOVE && drawer.isDrawerOpen(GravityCompat.START)) {
  return true; // 禁止滑动
  }
  return super.dispatchTouchEvent(ev);
  }
  }
  布局文件： activity_main<?xml version="1.0" encoding="utf-8"?>
  <com.demo.jack.testdrawerlayout.CustomDrawerLayout xmlns:android=“http://schemas.android.com/apk/res/android”
  xmlns:app=“http://schemas.android.com/apk/res-auto”
  xmlns:tools=“http://schemas.android.com/tools”
  android:id="@+id/drawer_layout"
  android:layout_width=“match_parent”
  android:layout_height=“match_parent”
  android:fitsSystemWindows=“true”
  tools:openDrawer=“start”>

<RelativeLayout
    android:id="@+id/rl"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv"
        android:layout_marginTop="20dp"
        android:text="打开侧滑栏"
        android:layout_marginRight="20dp"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn1"
        android:layout_centerVertical="true"
        android:layout_alignParentRight="true"
        android:text="Button1"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn2"
        android:layout_below="@id/btn1"
        android:layout_alignParentRight="true"
        android:text="Button2"/>

</RelativeLayout>

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="150dp"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header_main"
    app:menu="@menu/activity_main_drawer" />

</com.demo.jack.testdrawerlayout.CustomDrawerLayout>
mainactivity 布局文件中的 nav_header_main 布局文件<?xml version="1.0" encoding="utf-8"?>
<com.demo.jack.testdrawerlayout.CustomDrawerLayout xmlns:android=“http://schemas.android.com/apk/res/android”
xmlns:app=“http://schemas.android.com/apk/res-auto”
xmlns:tools=“http://schemas.android.com/tools”
android:id="@+id/drawer_layout"
android:layout_width=“match_parent”
android:layout_height=“match_parent”
android:fitsSystemWindows=“true”
tools:openDrawer=“start”>

<RelativeLayout
    android:id="@+id/rl"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv"
        android:layout_marginTop="20dp"
        android:text="打开侧滑栏"
        android:layout_marginRight="20dp"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn1"
        android:layout_centerVertical="true"
        android:layout_alignParentRight="true"
        android:text="Button1"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn2"
        android:layout_below="@id/btn1"
        android:layout_alignParentRight="true"
        android:text="Button2"/>

</RelativeLayout>

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="150dp"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header_main"
    app:menu="@menu/activity_main_drawer" />

</com.demo.jack.testdrawerlayout.CustomDrawerLayout>
`

最重要的自定义 CustomDrawerLayout 类文件

`package com.demo.jack.testdrawerlayout;

import android.content.Context;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewCompat;
import android.support.v4.widget.DrawerLayout;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;

/**

自定义 DrawerLayout 重写onInterceptTouchEvent 当点击的时候，判断是否是
*/
public class CustomDrawerLayout extends DrawerLayout {

public CustomDrawerLayout(Context context){
this(context, null);
}

public CustomDrawerLayout(Context context,AttributeSet attrs) {
this(context, attrs, 0);
}

public CustomDrawerLayout(Context context,AttributeSet attrs, int defStyle) {
super(context, attrs,defStyle);
}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev){
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
final float x = ev.getX();
final float y = ev.getY();
final View touchedView = findTopChildUnder((int) x, (int) y);
if (touchedView != null && isContentView(touchedView)
&& this.isDrawerOpen(GravityCompat.START)) {
return false;
}
}
return super.onInterceptTouchEvent(ev);
}

/**
- 判断点击位置是否位于相应的View内
- @param x x坐标
- @param y y坐标
- @return 返回当前view
  */
  public View findTopChildUnder(int x, int y) {
  final int childCount = getChildCount();
  for (int i = childCount - 1; i >= 0; i–) {
  final View child = getChildAt(i);
  if (x >= child.getLeft() && x < child.getRight() &&
  y >= child.getTop() && y < child.getBottom()) {
  return child;
  }
  }
  return null;
  }
/**
- 判断点击触摸点的View是否是ContentView(即是主页面的View)
- @param child 子view
- @return boolean
  */
  boolean isContentView(View child) {
  return ((LayoutParams) child.getLayoutParams()).gravity == Gravity.NO_GRAVITY;
  }
/**
- 判断点击触摸点的View是否是DrawerView(即是侧边栏的View)
- @param child 子view
- @return boolean
  */
  boolean isDrawerView(View child) {
  final int gravity = ((LayoutParams) child.getLayoutParams()).gravity;
  final int absGravity = GravityCompat.getAbsoluteGravity(gravity,
  ViewCompat.getLayoutDirection(child));
  if ((absGravity & Gravity.LEFT) != 0) {
  // This child is a left-edge drawer
  return true;
  }
  if ((absGravity & Gravity.RIGHT) != 0) {
  // This child is a right-edge drawer
  return true;
  }
  return false;
  }

}
布局文件：activity_main_drawer<?xml version="1.0" encoding="utf-8"?>

<group android:checkableBehavior="single">
    <item
        android:id="@+id/nav_camera"
        android:icon="@drawable/ic_menu_camera"
        android:title="Import" />
    <item
        android:id="@+id/nav_gallery"
        android:icon="@drawable/ic_menu_gallery"
        android:title="Gallery" />
    <item
        android:id="@+id/nav_slideshow"
        android:icon="@drawable/ic_menu_slideshow"
        android:title="Slideshow" />
    <item
        android:id="@+id/nav_manage"
        android:icon="@drawable/ic_menu_manage"
        android:title="Tools" />
</group>

<item android:title="Communicate">
    <menu>
        <item
            android:id="@+id/nav_share"
            android:icon="@drawable/ic_menu_share"
            android:title="Share" />
        <item
            android:id="@+id/nav_send"
            android:icon="@drawable/ic_menu_send"
            android:title="Send" />
    </menu>
</item>

` 布局文件：app_bar_main

`<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android=“http://schemas.android.com/apk/res/android”
xmlns:app=“http://schemas.android.com/apk/res-auto”
xmlns:tools=“http://schemas.android.com/tools”
android:layout_width=“match_parent”
android:layout_height=“match_parent”
android:fitsSystemWindows=“true”
android:clickable=“true”
tools:context=“com.demo.jack.testdrawerlayout.MainActivity”>

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<include layout="@layout/content_main" />

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    android:src="@android:drawable/ic_dialog_email" />

</android.support.design.widget.CoordinatorLayout>
`

如需源码，可留言发你。
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