Android实现添加耳机状态图标的方法
一、背景介绍
在Android系统中,状态栏是用户获取设备信息和通知的关键区域,原生的Android系统并不提供耳机插入或未插入的状态指示,本文将详细介绍如何在Android中实现耳机状态图标的显示,包括必要的资源准备、代码修改以及广播接收器的设置。
二、准备工作
资源文件准备
首先需要在frameworks/base/core/res/res/drawable-mdpi
目录下添加一个名为stat_sys_headset.png
的资源文件,这个文件可以根据设备的分辨率进行相应的调整,确保其在不同设备上的显示效果一致。
字符串标记添加
在frameworks/base/core/res/res/values/config.xml
文件中,添加耳机相关的字符串标记:
<string-array name="config_statusBarIcons"> <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">speakerphone</xliff:g></item> <item><xliff:g id="id">headset</xliff:g></item> <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>
三、代码修改
1. StatusBarPolicy.java 文件修改
打开frameworks/base/services/java/com/android/server/status/StatusBarPolicy.java
文件,进行如下修改:
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; //HeadSet private IBinder mHeadSetPlugIcon; private IconData mHeadSetPlugIconData; 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); } else if (action.equals(Intent.ACTION_HEADSET_PLUG)) { updateHeadset(intent); } 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(); //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); IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_TIME_TICK); filter.addAction(Intent.ACTION_ALARM_CHANGED); filter.addAction(Intent.ACTION_HEADSET_PLUG); filter.addAction(Intent.ACTION_SYNC_STATE_CHANGED); mContext.registerReceiver(mIntentReceiver, filter, null, mHandler); } 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); } }
2. PhoneStatusBarPolicy.java 文件修改(可选)
如果需要支持带MIC的耳机识别,可以在frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java
文件中进行如下修改:
public class PhoneStatusBarPolicy extends StatusBarPolicy { @Override public void updateHeadset(Intent intent) { final String action = intent.getAction(); final int state = intent.getIntExtra("state", 4); final int mic = intent.getIntExtra("microphone", 4); switch (state) { case 0: try { mService.setIconVisibility("headset", false); } catch (Exception e) { //Log.i("StatusBar Headset", "frist time to run"); } break; case 1: if (mic == 1) mService.setIcon("headset", R.drawable.stat_sys_headset_mic, 0, mContext.getResources().getString(R.string.headset_enabled)); else mService.setIcon("headset", R.drawable.stat_sys_headset, 0, mContext.getResources().getString(R.string.headset_enabled)); mService.setIconVisibility("headset", true); break; } } }
四、归纳与展望
通过以上步骤,我们可以在Android系统中成功添加耳机状态图标,并在耳机插入或拔出时更新状态栏显示,这一功能不仅提升了用户体验,还增加了系统的可用性,我们可以尝试更多定制化的状态栏图标,以满足不同用户的需求。
到此,以上就是小编对于“android实现添加耳机状态图标的方法”的问题就介绍到这了,希望介绍的几点解答对大家有用,有任何问题和不懂的,欢迎各位朋友在评论区讨论,给我留言。
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