找了一找，显示信号对应的图片是：
stat_sys_signal_null.png
查找一下这个图片在其它地方有没有：
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root@i3:~# cd frameworks/ |
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root@i3:frameworks# find -name stat_sys_signal_null.png |
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./base/docs/html/images/icon_design/stat_sys_signal_null.png |
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./base/core/res/res/drawable-mdpi/stat_sys_signal_null.png |
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./base/core/res/res/drawable-hdpi/stat_sys_signal_null.png |
再找找哪里用到了这个图片：
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root@i3:frameworks# grep -r stat_sys_signal_null ./ |
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./base/services/java/com/android/server/status/StatusBarPolicy.java: null, com.android.internal.R.drawable.stat_sys_signal_null, 0, 0); |
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./base/services/java/com/android/server/status/StatusBarPolicy.java: mPhoneData.iconId = com.android.internal.R.drawable.stat_sys_signal_null; |
找到了两处，其实是同一个文件，打开来看看吧：
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private void updateSignalStrength() { |
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inticonLevel = -1; |
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int[] iconList; |
04 |
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// Display signal strength while in "emergency calls only" mode |
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if(!hasService() && !mServiceState.isEmergencyOnly()) { |
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//Slog.d(TAG, "updateSignalStrength: no service"); |
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if(Settings.System.getInt(mContext.getContentResolver(), |
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Settings.System.AIRPLANE_MODE_ON,0) == 1) { |
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mPhoneData.iconId = com.android.internal.R.drawable.stat_sys_signal_flightmode; |
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}else if( mModemPowerState == ModemPowerTracker.PowerState.TURNED_ON ) { |
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mPhoneData.iconId = com.android.internal.R.drawable.stat_sys_signal_init; |
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}else { |
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mPhoneData.iconId = com.android.internal.R.drawable.stat_sys_signal_null; |
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} |
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mService.updateIcon(mPhoneIcon, mPhoneData,null); |
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return; |
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} |
这处代码看起来像是3G信号。
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// phone_signal |
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mPhone = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE); |
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mPhoneData = IconData.makeIcon("phone_signal", |
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null, com.android.internal.R.drawable.stat_sys_signal_null,0, 0); |
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mPhoneIcon = service.addIcon(mPhoneData,null); |
这个应该是电话信号了。