自定义Activity标题栏(Title bar)和窗体显示状态操作（requestWindowFeature()的应用）
1. 标题栏显示图标
但实际效果呢，我觉得不好看，和旁边的文字有相当距离！看看别人的图片的：
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效果图：
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你还可以添加其他控件，而这些控件的获取和事件响应都是直接在activity里面完成。
标题进度条显示
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public
void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_LEFT_ICON);
setContentView(R.layout.main);
getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,
android.R.drawable.icon);
// ...
}
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_LEFT_ICON);
setContentView(R.layout.main);
getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,
android.R.drawable.icon);
// ...
}
当然这个图标也可以通过自定义布局，使用ImageView来实现：
<?
xml
version
="1.0"
encoding
="utf-8"
?>
< LinearLayout xmlns:android ="http://schemas.android.com/apk/res/android"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content" >
< ImageView android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:src ="@drawable/icon" />
< TextView android:id ="@+id/text"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:layout_alignParentLeft ="true"
android:text ="文本" />
</ LinearLayout >
< LinearLayout xmlns:android ="http://schemas.android.com/apk/res/android"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content" >
< ImageView android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:src ="@drawable/icon" />
< TextView android:id ="@+id/text"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:layout_alignParentLeft ="true"
android:text ="文本" />
</ LinearLayout >
2.自定义布局
看看我自定义的标题栏：
布局代码（titlebar.xml）
<?
xml
version
="1.0"
encoding
="utf-8"
?>
< LinearLayout
xmlns:android ="http://schemas.android.com/apk/res/android"
android:orientation ="horizontal"
android:layout_width ="fill_parent"
android:layout_height ="wrap_content"
>
< TextView
android:text ="@string/app_name"
android:textColor ="#000"
android:paddingRight ="3.0dip"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content" />
< TextView
android:text ="@string/battery_text"
android:textColor ="#000"
android:paddingRight ="3.0dip"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content" />
< TextView
android:id ="@+id/battery_text"
android:textColor ="#00f"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content" />
</ LinearLayout >
< LinearLayout
xmlns:android ="http://schemas.android.com/apk/res/android"
android:orientation ="horizontal"
android:layout_width ="fill_parent"
android:layout_height ="wrap_content"
>
< TextView
android:text ="@string/app_name"
android:textColor ="#000"
android:paddingRight ="3.0dip"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content" />
< TextView
android:text ="@string/battery_text"
android:textColor ="#000"
android:paddingRight ="3.0dip"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content" />
< TextView
android:id ="@+id/battery_text"
android:textColor ="#00f"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content" />
</ LinearLayout >
Java代码：
public
void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.main);
//自定义标题栏
mWindow = getWindow();
mWindow.setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.titlebar);
mBatteryText = (TextView)findViewById(R.id.battery_text);
mBatteryInforeceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
int level = intent.getIntExtra( "level", 0);
int scale = intent.getIntExtra( "scale", 1);
mBatteryText.setText(String.valueOf(( int)(level*100/scale))+ "%");
}
};
}
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.main);
//自定义标题栏
mWindow = getWindow();
mWindow.setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.titlebar);
mBatteryText = (TextView)findViewById(R.id.battery_text);
mBatteryInforeceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
int level = intent.getIntExtra( "level", 0);
int scale = intent.getIntExtra( "scale", 1);
mBatteryText.setText(String.valueOf(( int)(level*100/scale))+ "%");
}
};
}
3. 设置标题栏的背景色和高度
虽然我们可以通过自定义布局文件在标题栏加入一些控件，但是仍然不能改变标题栏的高度、背景色，要想达到这个目的，只能使用theme(主题)。
\res\values\style.xml:
<?
xml
version
="1.0"
encoding
="utf-8"
?>
< resources >
< style name ="CustomWindowTitleBackground" >
< item name ="android:background" >#47B2FF </ item >
</ style >
< style name ="activityTitlebar" parent ="android:Theme" >
< item name ="android:windowTitleSize" >34dp </ item > <!-- 高度 -->
< item name ="android:windowTitleBackgroundStyle" >@style/CustomWindowTitleBackground </ item > <!-- 背景色,需要调用前面的颜色设置 -->
</ style >
</ resources >
< resources >
< style name ="CustomWindowTitleBackground" >
< item name ="android:background" >#47B2FF </ item >
</ style >
< style name ="activityTitlebar" parent ="android:Theme" >
< item name ="android:windowTitleSize" >34dp </ item > <!-- 高度 -->
< item name ="android:windowTitleBackgroundStyle" >@style/CustomWindowTitleBackground </ item > <!-- 背景色,需要调用前面的颜色设置 -->
</ style >
</ resources >
窗体显示状态操作（requestWindowFeature()的应用）
首先介绍一个重要方法那就是requestWindowFeature(featrueId),它的功能是启用窗体的扩展特性。参数是Window类中定义的常量。
一、枚举常量
1.DEFAULT_FEATURES：系统默认状态，一般不需要指定
2.FEATURE_CONTEXT_MENU：启用ContextMenu，默认该项已启用，一般无需指定
3.FEATURE_CUSTOM_TITLE：自定义标题。当需要自定义标题时必须指定。如：标题是一个按钮时
4.FEATURE_INDETERMINATE_PROGRESS：不确定的进度
5.FEATURE_LEFT_ICON：标题栏左侧的图标
6.FEATURE_NO_TITLE：没标题
7.FEATURE_OPTIONS_PANEL：启用“选项面板”功能，默认已启用。
8.FEATURE_PROGRESS：进度指示器功能
9.FEATURE_RIGHT_ICON:标题栏右侧的图标
对于默认启用的和前面有介绍的就略去不提了。我们说比较常用的FEATURE_INDETERMINATE_PROGRESS和FEATURE_NO_TITLE。
FEATURE_INDETERMINATE_PROGRESS：表示一个进程正在运行
progress.xml
<?
xml
version
="1.0"
encoding
="utf-8"
?>
< LinearLayout xmlns:android ="http://schemas.android.com/apk/res/android"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content" >
< ProgressBar android:id ="@+id/progress"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:layout_gravity ="center_vertical"
style ="?android:attr/progressBarStyleSmallTitle" >
</ ProgressBar >
</ LinearLayout >
< LinearLayout xmlns:android ="http://schemas.android.com/apk/res/android"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content" >
< ProgressBar android:id ="@+id/progress"
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:layout_gravity ="center_vertical"
style ="?android:attr/progressBarStyleSmallTitle" >
</ ProgressBar >
</ LinearLayout >
Java代码
public
void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.main);
getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, R.layout.progress);
setProgressBarIndeterminateVisibility( true); //适当时候set false来隐藏
//...
}
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.main);
getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, R.layout.progress);
setProgressBarIndeterminateVisibility( true); //适当时候set false来隐藏
//...
}
FEATURE_NO_TITLE 就是不显示标题栏，某些时候全屏需要，但全屏不等于不显示标题栏，我尝试显示标题栏的同时全屏来去掉系统的状态栏：
Java代码
public
void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.main);
//自定义标题栏
mWindow = getWindow();
mWindow.setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.titlebar);
/* full screen */
mWindow.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// ...
}
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.main);
//自定义标题栏
mWindow = getWindow();
mWindow.setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.titlebar);
/* full screen */
mWindow.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
// ...
}
所以真正实现全屏的是后面的那句话!
效果图
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本文部分内容摘录于《Android 应用程序窗体显示状态操作（requestWindowFeature()的应用）》
http://www.cnblogs.com/salam/archive/2010/11/30/1892143.html
本文转自 Icansoft 51CTO博客，原文链接：
http://blog.51cto.com/android/636134
