Android Studio自帶的Navigation Drawer主題撐滿了整個界面的高度把ToolBar擋住了,很遺憾左上角那個炫酷的動態Icon看不見了。有興趣的同學可以去創建一個project,什麼都不用寫,直接run就可以看到效果了。
如圖,就是Android Studio自帶的Navigation Drawer樣式。
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
我們可以看到這是把ToolBar放在DrawerLayout主界面裏的方式,所以會被NavigationView給遮擋住。
本文主要是重新編排DrawerLayout的位置,讓ToolBar顯示出來。
首先新建一個project,(注:最好選擇Navigation Drawer Activity,External Library中該有的都有了),
否則會出現Error:(16) No resource identifier found for attribute ‘headerLayout’ in package ‘com.example.xxx’。當然出現這個錯誤也不要急,只要在build.gradle(Module:app)的compil後面再加上一條即可。
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.0.1'
compile 'com.android.support:design:25.0.1' //添加
testCompile 'junit:junit:4.12'
}
然後在activity_main.xml中佈局,將DrawerLayout放在ToolBar下面
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<!--Toolbar-->
<include layout="@layout/custom_toolbar" />
<!--DrawerLayout-->
<include layout="@layout/custom_drawerlayout" />
</LinearLayout>
這裏ToolBar過於簡單就不講了。
custom_drawerlayout.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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"
tools:openDrawer="start">
<!--========================主界面內容========================-->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Hello World!"
android:textSize="50sp"
android:textColor="#0A8F08"
android:gravity="center"/>
<!--========================側邊欄內容========================-->
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:scrollbars="none"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/my_menu"/>
</android.support.v4.widget.DrawerLayout>
爲了美觀,這裏還加了一個header。nav_header_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="@dimen/nav_header_height"
android:background="@drawable/side_nav_bar"
android:gravity="bottom"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:theme="@style/ThemeOverlay.AppCompat.Dark">
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="@dimen/nav_header_vertical_spacing"
app:srcCompat="@android:drawable/sym_def_app_icon" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="@dimen/nav_header_vertical_spacing"
android:text="Android Studio"
android:textAppearance="@style/TextAppearance.AppCompat.Body1" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="[email protected]" />
</LinearLayout>
header可以放個頭像、個人信息、郵箱什麼的,比如QQ就是頭像、QQ等級和簽名。
放置完header以後可以通過menu設置一個帶圖標的菜單欄,(動態添加的方式爲 navigationView.getMenu().add();只是不知道如何添加Icon,如果有大神知道,請告知)。
以下是my_menu.xml部分
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:id="@+id/nav_camera"
android:icon="@drawable/ic_menu_camera"
android:title="Camera" />
<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>
</menu>
到這裏,佈局差不多完成了,不過還有一點要記住,那就是style裏面的主題得選擇NoActionBar,因爲我們有ToolBar了,不再需要ActionBar。(嘗試了一下,如果不改成NoActionBar,App會崩潰。)
最後來講講Activity。
MAinActivity.java
package com.example.zhan.navigationdraw2_demo;
import android.graphics.Color;
import android.os.Bundle;
import android.support.design.internal.NavigationMenuView;
import android.support.v4.view.GravityCompat;
import android.view.View;
import android.support.design.widget.NavigationView;
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.MenuItem;
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
//聲明相關變量
public Toolbar toolbar;
public DrawerLayout mDrawerLayout;
public ActionBarDrawerToggle mDrawerToggle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViews(); //獲取控件
toolbar.setTitle("Toolbar");//設置Toolbar標題
toolbar.setTitleTextColor(Color.parseColor("#FFFFFFFF")); //設置標題顏色
setSupportActionBar(toolbar); //綁定
//創建返回鍵,並實現打開關/閉監聽
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, toolbar, R.string.open, R.string.close) {
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
}
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
}
};
mDrawerToggle.syncState(); //Synchronize the state of the drawer indicator/affordance with the linked DrawerLayout
mDrawerLayout.addDrawerListener(mDrawerToggle); //監聽DrawerLayout
}
private void findViews() {
toolbar = (Toolbar) findViewById(R.id.tl_custom);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
// navigationView.setItemIconTintList(null); //設置圖標爲本色
disableNavigationViewScrollbars(navigationView); //設置NavigationView滾動條隱藏
}
@Override
public void onBackPressed() {
if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
mDrawerLayout.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@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) {
}
mDrawerLayout.closeDrawer(GravityCompat.START);
return true;
}
private void disableNavigationViewScrollbars(NavigationView navigationView) {
if (navigationView != null) {
NavigationMenuView navigationMenuView = (NavigationMenuView) navigationView.getChildAt(0);
if (navigationMenuView != null) {
navigationMenuView.setVerticalScrollBarEnabled(false);
}
}
}
}
其實Activity的工作很簡單,就是監聽ToolBar的點擊,點擊後展開側邊欄,側邊欄展開過程中ToolBar左側Icon動態變化以及點擊主界面側邊欄收回等功能無需複雜代碼實現。再一個監聽側邊欄的點擊(點擊後收回)和選中情況(選中不同的item執行不同的事件)。
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