本文實例講述了android實現添加耳機狀態圖標的方法。分享給大家供大家參考。具體如下：
原生態的android系統是沒有耳機插入或未插入的狀態指示的，本文就是講解如何添加耳機插入的狀態指示。效果圖如下
如圖，當插入耳機后，在status bar上出現了一個耳機的圖標。
這個耳機的圖標和sim卡信號等圖標在status bar的右邊，因此這個實現肯定不是通過notification實現的，那么添加這個功能只能在framwork里面尋找了。具體的修改步驟如下：
1.在frameworks/base/core/res/res/drawable-mdpi目錄先添加一個stat_sys_headset.png資源文件。這里面資源文件的目錄要根據設備的分辨率來確定，我的設備是HVGA的，因此資源文件放在drawable-mdpi目錄下。
2.修改frameworks/base/services/java/com/android/server/status/StatusBarPolicy.java
public class StatusBarPolicy { private static final String TAG = "StatusBarPolicy"; private static StatusBarPolicy sInstance; ..... // alarm clock // Icon lit when clock is set private IBinder mAlarmClockIcon; private IconData mAlarmClockIconData; //modify here start //HeadSet private IBinder mHeadSetPlugIcon; private IconData mHeadSetPlugIconData; //modify here end ..... private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (action.equals(Intent.ACTION_TIME_TICK)) { updateClock(); } ..... else if (action.equals(Intent.ACTION_ALARM_CHANGED)) { updateAlarm(intent); } //modify here start else if (action.equals(Intent.ACTION_HEADSET_PLUG)) { updateHeadset(intent); } //modify here end else if (action.equals(Intent.ACTION_SYNC_STATE_CHANGED)) { updateSyncState(intent); } ...... }; private StatusBarPolicy(Context context, StatusBarService service) { mContext = context; mService = service; mSignalStrength = new SignalStrength(); if(FeatureOption.MTK_GEMINI_SUPPORT == true) { mSignalStrengthGemini = new SignalStrength(); } mBatteryStats = BatteryStatsService.getService(); .... //modify here start //HeadSet mHeadSetPlugIconData = IconData.makeIcon( "headset", null,com.android.internal.R.drawable.stat_sys_headset, 0, 0); mHeadSetPlugIcon = service.addIcon(mHeadSetPlugIconData, null); service.setIconVisibility(mHeadSetPlugIcon, false); //modify here end .... IntentFilter filter = new IntentFilter(); // Register for Intent broadcasts for... filter.addAction(Intent.ACTION_TIME_TICK); .... //modify here start filter.addAction(Intent.ACTION_HEADSET_PLUG); //modify here end .... } //modify here start private final void updateHeadset(Intent intent) { Slog.d(TAG, "updateHeadset: state=" + intent.getIntExtra("state", 0)); mService.setIconVisibility(mHeadSetPlugIcon, (intent.getIntExtra("state", 0) == 1)?true:false); } //modify here end .....}3.修改frameworks/base/core/res/res/values/arrays.xml
<string-array name="status_bar_icon_order"> <item><xliff:g id="id">clock</xliff:g></item> <item><xliff:g id="id">secure</xliff:g></item> <item><xliff:g id="id">alarm_clock</xliff:g></item> <item><xliff:g id="id">battery</xliff:g></item> <item><xliff:g id="id">phone_signal_2</xliff:g></item> <item><xliff:g id="id">phone_signal</xliff:g></item> <item><xliff:g id="id">phone_evdo_signal</xliff:g></item> <item><xliff:g id="id">data_connection</xliff:g></item> <item><xliff:g id="id">cdma_eri</xliff:g></item> <item><xliff:g id="id">tty</xliff:g></item> <item><xliff:g id="id">volume</xliff:g></item> <item><xliff:g id="id">mute</xliff:g></item> <item><xliff:g id="id">speakerphone</xliff:g></item> <!-- modify here start. --> <item><xliff:g id="id">headset</xliff:g></item> <!-- modify here end --> <item><xliff:g id="id">wifi</xliff:g></item> <item><xliff:g id="id">tty</xliff:g></item> <item><xliff:g id="id">bluetooth</xliff:g></item> <item><xliff:g id="id">gps</xliff:g></item> <item><xliff:g id="id">sync_active</xliff:g></item> <item><xliff:g id="id">sync_failing</xliff:g></item> <item><xliff:g id="id">ime</xliff:g></item></string-array>
其中“headset”這個字符串就是“mHeadSetPlugIconData = IconData.makeIcon( "headset", null0, 0);”中的第一個參數。“<item><xliff:g id="id">headset</xliff:g></item> ”這個語句的位置于圖標在status bar上顯示的位置有關。
希望本文所述對大家的Android程序設計有所幫助。
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