android实现添加耳机状态图标的方法
时间：2020-11-30 13:09:42 | 栏目：Android代码 | 点击：次
本文实例讲述了android实现添加耳机状态图标的方法。分享给大家供大家参考。具体如下：
原生态的android系统是没有耳机插入或未插入的状态指示的，本文就是讲解如何添加耳机插入的状态指示。效果图如下
如图，当插入耳机后，在status bar上出现了一个耳机的图标。
这个耳机的图标和sim卡信号等图标在status bar的右边，因此这个实现肯定不是通过notification实现的，那么添加这个功能只能在framwork里面寻找了。具体的修改步骤如下：
1.在frameworks/base/core/res/res/drawable-mdpi目录先添加一个stat_sys_headset.png资源文件。这里面资源文件的目录要根据设备的分辨率来确定，我的设备是HVGA的，因此资源文件放在drawable-mdpi目录下。
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”这个字符串就是“mHeadSetPlugIconData = IconData.makeIcon( "headset", null0, 0);”中的第一个参数。“<item><xliff:g id="id">headset</xliff:g></item> ”这个语句的位置于图标在status bar上显示的位置有关。
希望本文所述对大家的Android程序设计有所帮助。