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1. 标题栏显示图标 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); // ... }
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:
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 > 效果图:
<? 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 > 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))+
"%");
}
};
}
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。
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)。
<? 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 > 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。
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
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 <? 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 > 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 //... }
标题进度条显示
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:
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);
// ... }
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