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    文章主要参考《Android实现自定义状态栏》

    公司的项目目标是自己开发一个状态栏，显示时间日期，蓝牙无线等状态

    核心：statusBar是SystemUI的一部分，statusBar跟正常建立的Android app不同，它不能有主Activity，需要在服务中创建窗口画面。SystemUIService是SystemUI的入口处，是被系统启动，之后通过WindowsManager创建画面显示。

    1、AndroidManifest.xml文件

    1. package="com.android.systemui"
    3. <uses-permission android:name="android.permission.STATUS_BAR_SERVICE" />/*这个可能不需要*/
    4. <uses-permission android:name="android.permission.STATUS_BAR" />
    5. <uses-permission android:name="android.permission.INTERNAL_SYSTEM_WINDOW" />/* 创建TYPE_STATUS_BAR类型窗体，需要此权限*/
    7. <service android:name="SystemUIService"
    8.     android:exported="true"
    9.     />
    10. /*不能设置启动Activity*/
    11. <!--<activity android:name=".MainActivity">-->
    12.     <!--<intent-filter>-->
    13.         <!--<action android:name="android.intent.action.MAIN" />-->
    14.         <!--<category android:name="android.intent.category.DEFAULT" />-->
    15.         <!--<category android:name="android.intent.category.LAUNCHER" />-->
    16.     <!--</intent-filter>-->
    17. <!--</activity>-->

    2、 StatusIconView

    1. public class StatusIconView extends LinearLayout {
    2.     //图标
    3.     private ImageView mIcon;
    5.     public StatusIconView(Context context) {
    6.         super(context);
    7.     }
    9.     public StatusIconView(Context context, AttributeSet attrs) {
    10.         this(context, attrs, 0);
    11.     }
    12.     public StatusIconView(Context context, AttributeSet attrs, int defStyle) {
    13.         super(context, attrs, defStyle);
    14.         init(context, attrs, defStyle);
    15.     }
    16.     private void init(Context context, AttributeSet attrs, int defStyle) {
    17.         LayoutInflater inflater = (LayoutInflater) context
    18.                 .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    19.         inflater.inflate(R.layout.status_icon_view, this);
    20.         mIcon = (ImageView) findViewById(R.id.icon);
    21.     }
    23.     public final void setIcon(int resId) {
    24.         mIcon.setImageResource(resId);
    25.     }
    27.     public final ImageView getIconView(){
    28.         return mIcon;
    29.     }
    30. }

    需要的xml文件status_icon_view

    1. <?xml version="1.0" encoding="utf-8"?>
    2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    3.     xmlns:tools="http://schemas.android.com/tools"
    4.     android:layout_width="wrap_content"
    5.     android:layout_height="wrap_content"
    6.     android:orientation="horizontal" >
    8.     <ImageView
    9.         android:id="@+id/icon"
    10.         android:layout_width="wrap_content"
    11.         android:layout_height="@dimen/status_bar_icon_height" />
    13.     <!--<TextView-->
    14.         <!--android:id="@+id/title"-->
    15.         <!--android:layout_width="@dimen/status_bar_icon_width"-->
    16.         <!--android:layout_height="@dimen/status_bar_icon_height" />-->
    18. </LinearLayout>

    3、SystemUIService

    1. public class SystemUIService extends Service {
    2.     private WindowManager wm = null;
    3.     private WindowManager.LayoutParams statusBarParams = new WindowManager.LayoutParams();
    5.     private LinearLayout statusBarLayout=null;
    6.     private StatusBarViewHolder statusBarViewHolder = new StatusBarViewHolder();
    8.     @Override
    9.     public void onCreate() {
    10.         super.onCreate();
    11.         createStatusView();
    12.         registerReceiver();
    13.     }
    15.     @Override
    16.     public IBinder onBind(Intent intent) {
    17.         return null;
    18.     }
    19.     /* 手机电池电量显示 */
    20.     BroadcastReceiver phoneBatteryReceiver = new BroadcastReceiver(){
    21.         public void onReceive(Context context, Intent intent) {
    22.             if(intent.getAction().equals(Intent.ACTION_BATTERY_CHANGED)){
    24.                 int level = intent.getIntExtra("level", 0);
    25.                 int scale = intent.getIntExtra("scale", 100);
    26.                 int curPower = (level * 100 / scale);
    27.                 updateIcon(getBatteryImage(curPower), statusBarViewHolder.phoneBatteryIcon);
    28.             }
    29.         };
    30.     };
    31.     private void createStatusView(){
    33.         Context context = getApplicationContext();
    34.         statusBarLayout = new LinearLayout(context);
    35.         //statusBarLayout.setGravity(Gravity.CENTER_VERTICAL);
    37.         //statusBarLayout.setLayoutParams(new android.view.ViewGroup.LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT));
    38.         wm=(WindowManager)getApplicationContext().getSystemService(WINDOW_SERVICE);
    40.         ((LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE)).inflate(R.layout.status_bar, statusBarLayout);
    42.         findStatusBarViews();
    44.         wm.addView(statusBarLayout, getStatusViewParams());
    45.     }
    48.     private WindowManager.LayoutParams getStatusViewParams(){
    50.         statusBarParams = new WindowManager.LayoutParams(
    51.                 ViewGroup.LayoutParams.MATCH_PARENT,
    52.                 (int) getResources().getDimension(
    53.                         R.dimen.status_bar_height),
    54.                 WindowManager.LayoutParams.TYPE_STATUS_BAR,
    55.                 WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
    56.                         | WindowManager.LayoutParams.FLAG_TOUCHABLE_WHEN_WAKING
    57.                         | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH
    58.                         | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
    59.                         | WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS,
    60.                 PixelFormat.TRANSLUCENT);
    61.         statusBarParams.flags |= WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED;
    62.         statusBarParams.gravity = Gravity.TOP;
    63.         statusBarParams.softInputMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE;
    64.         statusBarParams.setTitle("StatusBar");
    65.         statusBarParams.packageName = this.getPackageName();
    66.         return statusBarParams;
    67.     }
    69.     private void findStatusBarViews() {
    70.         statusBarViewHolder.datetimeTextView = (TextView) statusBarLayout.findViewById(R.id.datetime_textView);
    71.         statusBarViewHolder.phoneUSBIcon = (StatusIconView)statusBarLayout.findViewById(R.id.usb_icon);
    72.         statusBarViewHolder.phoneSDCardIcon = (StatusIconView)statusBarLayout.findViewById(R.id.sdcard_icon);
    73.         statusBarViewHolder.phoneHotspotIcon = (StatusIconView)statusBarLayout.findViewById(R.id.hotspot_icon);
    74.         statusBarViewHolder.phoneMobileIcon = (StatusIconView)statusBarLayout.findViewById(R.id.mobile_icon);
    75.         statusBarViewHolder.phoneBluetoothIcon = (StatusIconView)statusBarLayout.findViewById(R.id.bluetooth_icon);
    76.         statusBarViewHolder.phoneWifiIcon = (StatusIconView)statusBarLayout.findViewById(R.id.wifi_icon);
    77.         statusBarViewHolder.phoneBatteryIcon = (StatusIconView)statusBarLayout.findViewById(R.id.battery_icon);
    79.         statusBarViewHolder.phoneUSBIcon.setIcon(R.drawable.usb);
    80.         statusBarViewHolder.phoneSDCardIcon.setIcon(R.drawable.sd);
    81.         statusBarViewHolder.phoneBluetoothIcon.setIcon(R.drawable.btconnected);
    82.         statusBarViewHolder.phoneWifiIcon.setIcon(R.drawable.wifi0);
    83.     }
    85.     private void updateIcon(int Icon, StatusIconView icon){
    86.         icon.setIcon(Icon);
    87.     }
    88.     private int getBatteryImage(int battery) {
    89.         int resId;
    90.         if(battery > 0 && battery <= 10){
    91.             resId = R.drawable.battery0;
    92.         }else if(battery > 10 && battery <= 40){
    93.             resId = R.drawable.battery1;
    94.         }else if(battery > 40 && battery <= 60){
    95.             resId = R.drawable.battery2;
    96.         }else if(battery > 60 && battery <= 80){
    97.             resId = R.drawable.battery3;
    98.         }else if(battery > 80 && battery <= 100){resId = R.drawable.battery4;
    99.         }else{
    100.             resId = R.drawable.battery0;
    101.         }
    103.         return resId;
    104.     }/**
    105.      * 注册状态栏更新信息的广播
    106.      */
    107.     private void registerReceiver() {
    109.         registerReceiver(phoneBatteryReceiver , new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
    110.     }
    111.     /**
    112.      * 状态栏的所有图标
    113.      */
    114.     private class StatusBarViewHolder{
    115.         TextView datetimeTextView;
    116.         StatusIconView phoneUSBIcon;
    117.         StatusIconView phoneSDCardIcon;
    118.         StatusIconView phoneHotspotIcon;
    119.         StatusIconView phoneMobileIcon;
    120.         StatusIconView phoneBluetoothIcon;
    121.         StatusIconView phoneWifiIcon;
    122.         StatusIconView phoneBatteryIcon;
    123.     }
    124.     @Override
    125.     public void onDestroy(){
    126.         unregisterReceiver();
    127.         wm.removeView(statusBarLayout);
    128.         super.onDestroy();
    129.     }
    130.     private void unregisterReceiver(){
    131.         unregisterReceiver(phoneBatteryReceiver);
    132.     }
    134.     public String GetSysTime() {
    135.         long sysTime = System.currentTimeMillis();
    136.         String time = "";
    137.         boolean is24Hour =  DateFormat.is24HourFormat(getApplicationContext());
    138.         /** @brief Get the same time as the system. */
    139.         if(is24Hour) {
    140.             time = (String) DateFormat.format("yyyy-MM-dd HH:mm:ss", sysTime);
    141.         }
    142.         else{
    143.             time = (String) DateFormat.format("yyyy-MM-dd hh:mm:ss", sysTime);
    144.         }
    145.         return time;
    146.     }

    需要的xml文件status_bar

    1. <?xml version="1.0" encoding="utf-8"?>
    2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    3.     android:orientation="horizontal"
    4.     android:layout_width="match_parent"
    5.     android:layout_height="@dimen/status_bar_height">
    7.     <TextView
    8.         android:id="@+id/datetime_textView"
    9.         android:layout_width="0dp"
    10.         android:layout_weight="1"
    11.         android:layout_height="@dimen/status_bar_date_height"
    12.         android:textColor="@android:color/holo_red_dark"
    13.         android:layout_gravity="center"/>
    15.     <LinearLayout
    16.         android:layout_width="0dp"
    17.         android:layout_weight="1"
    18.         android:gravity="right"
    19.         android:layout_height="@dimen/status_bar_icon_width">
    21.         <com.android.systemui.StatusIconView
    22.             android:id="@+id/usb_icon"
    23.             android:layout_width="wrap_content"
    24.             android:layout_height="@dimen/status_bar_icon_height"
    25.             android:layout_gravity="center"/>
    27.         <com.android.systemui.StatusIconView
    28.             android:id="@+id/sdcard_icon"
    29.             android:layout_width="wrap_content"
    30.             android:layout_height="wrap_content"
    31.             android:layout_gravity="center"/>
    33.         <com.android.systemui.StatusIconView
    34.             android:id="@+id/hotspot_icon"
    35.             android:layout_width="wrap_content"
    36.             android:layout_height="wrap_content"
    37.             android:layout_gravity="center"/>
    39.         <com.android.systemui.StatusIconView
    40.             android:id="@+id/mobile_icon"
    41.             android:layout_width="wrap_content"
    42.             android:layout_height="wrap_content"
    43.             android:layout_gravity="center"/>
    45.         <com.android.systemui.StatusIconView
    46.             android:id="@+id/bluetooth_icon"
    47.             android:layout_width="wrap_content"
    48.             android:layout_height="wrap_content"
    49.             android:layout_gravity="center"/>
    51.         <com.android.systemui.StatusIconView
    52.             android:id="@+id/wifi_icon"
    53.             android:layout_width="wrap_content"
    54.             android:layout_height="wrap_content"
    55.             android:layout_gravity="center"/>
    57.         <com.android.systemui.StatusIconView
    58.             android:id="@+id/battery_icon"
    59.             android:layout_width="wrap_content"
    60.             android:layout_height="wrap_content"
    61.             android:layout_gravity="center"/>
    62.     </LinearLayout>
    65.     <!--<TextView-->
    66.         <!--android:id="@+id/ssidInfo"-->
    67.         <!--android:layout_width="match_parent"-->
    68.         <!--android:layout_height="400dp"-->
    69.         <!--android:lines="10"-->
    70.         <!--android:textColor="@android:color/holo_red_dark"/>-->
    71. </LinearLayout>

    注意：以上工程一定要替换系统的SystemUI源码，编译后烧写内核才可以