1.概述
Android 3.0 Android 推了 ActionBar 這個控件。ActionBar 過去最多人使用的兩大套件就是 ActionBarSherlock 以及官方提供在 support library v 7 裏的 AppCompat。而ActionBar 已經在 Android 5.x(API Level 21) 之後被改爲由 Toolbar 來取代1。
2.實現
2.1 平臺配置
- Android Studio 1.4
- compileSdkVersion 23
- buildToolsVersion “23.0.1”
- build:gradle:1.3.0
首先需要添加appcompat-v7支持。如果是在Android Studio 1.0 以上創建的項目,默認已經添加了appcompat-v7支持了,如果不是最新版AS則需要在build.gradle中添加如下代碼:
dependencies {
...//其他代碼
compile 'com.android.support:appcompat-v7:21.0.2'
}
2.2 風格(style)
res/values/styles.xml
<resources>
<!-- Activity themes -->
<style name="AppTheme" parent="Theme.Base" />
<style name="Theme.Base" parent="Theme.AppCompat.Light.NoActionBar" >
<item name="android:colorPrimary">@color/color_primary</item>
<item name="android:colorPrimaryDark">@color/color_primaryDark</item>
<item name="android:colorAccent">@color/color_accent</item>
<item name="android:navigationBarColor">@color/color_primary</item>
</style>
</resources>
res/values/colors.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="white">#FFFFFF</color>
<color name="color_primary">#F44336</color>
<color name="color_primaryDark">#D32F2F</color>
<color name="color_accent">#2196F3</color>
</resources>
res/menu/main.xml
<menu 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"
tools:context=".MainActivity" >
<item
android:id="@+id/ab_search"
android:orderInCategory="80"
android:title="action_search"
app:actionViewClass="android.support.v7.widget.SearchView"
app:showAsAction="ifRoom"/>
<item
android:id="@+id/action_share"
android:orderInCategory="90"
android:title="action_share"
app:actionProviderClass="android.support.v7.widget.ShareActionProvider"
app:showAsAction="ifRoom"/>
<item
android:id="@+id/action_settings"
android:orderInCategory="100"
android:title="action_settings"
app:showAsAction="never"/>
</menu>
2.3 佈局(Layout)
2.3.1 toolbar.xml
由於Toolbar是繼承自View,所以可以像其他標準控件一樣直接主佈局文件添加Toolbar。爲了提高Toolbar的重用效率,可以在layout創建一個toolbar.xml代碼如下:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/color_primary"
android:minHeight="?attr/actionBarSize"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
app:theme="@style/ThemeOverlay.AppCompat.ActionBar"
>
</android.support.v7.widget.Toolbar>
2.4 程序(Java)
MainActivity.java
public class MainActivity extends ActionBarActivity {
private Toolbar mToolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
}
private void initViews() {
mToolbar = (Toolbar) findViewById(R.id.toolbar);
mToolbar.setNavigationIcon(R.drawable.a1);
mToolbar.setLogo(R.drawable.logo);
mToolbar.setTitle("My Title");// 標題的文字需在setSupportActionBar之前,不然會無效
mToolbar.setSubtitle("Sub Title");
mToolbar.setTitleTextColor(getResources().getColor(R.color.white));
setSupportActionBar(mToolbar);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
return super.onOptionsItemSelected(item);
}
}
3. 效果
這樣,一個最簡單的Toolbar便完成了,如下圖。但Toolbar的功能遠不止於此,它具有豐富的可定製性。
4. Toolbar配合DrawerLayout使用
4.1 添加drawerlayout.xml
和Toolbar類似,爲了提高代碼利用率,可以在res/layout中創建一個drawerlayout.xml代碼如下:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!--內容界面-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/content"
android:orientation="vertical" >
</LinearLayout>
<!--側滑菜單內容-->
<LinearLayout
android:id="@+id/drawer_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="@android:color/darker_gray"
android:orientation="vertical"
android:padding="8dp" >
</LinearLayout>
</android.support.v4.widget.DrawerLayout>
修改activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include layout="@layout/toolbar"></include>
<include layout="@layout/drawerlayout"></include>
</LinearLayout>
修改MainActivity.java
public class MainActivity extends ActionBarActivity {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
private Toolbar mToolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
}
private void initViews() {
mToolbar = (Toolbar) findViewById(R.id.toolbar);
mToolbar.setNavigationIcon(R.drawable.a1);
mToolbar.setLogo(R.drawable.logo);
mToolbar.setTitle("My Title");// 標題的文字需在setSupportActionBar之前,不然會無效
mToolbar.setSubtitle("Sub Title");
mToolbar.setTitleTextColor(getResources().getColor(R.color.white));
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, mToolbar, R.string.drawer_open,
R.string.drawer_close);
mDrawerToggle.syncState();
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
return super.onOptionsItemSelected(item);
}
}