<pre name="code" class="java"><pre name="code" class="javascript">一：直接定位到onCreate（）方法super.onCreate(savedInstanceState);调用了父类的onCreate方法
这个是父类的onCreate方法：
super.onCreate(icicle);//还要调父类的方法int helpResource = getHelpResource();
<span style="white-space:pre"> </span>if (helpResource != 0) {
mHelpUrl = getResources().getString(helpResource);
}
得出父类也没做啥事继续ContentResolver resolver = getContentResolver();//是android中存了数据，用contentprovider提供接口，在activity中用此方法获得contentresover对象，来操
int activePhoneType = TelephonyManager.getDefault().getCurrentPhoneType();//调用getDefault()方法获得TelephoneManager类，调用getCurrentPhoneType()<的意思是获得当前phone的类型，GSM/COMA
<span style="white-space:pre"> </span>TelephonyManager.java这个方法就是
public static TelephonyManager getDefault() {
return sInstance;
} mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);//这个服务获得系统音量，铃声之类的管理继续
<span style="white-space:pre"> </span>addPreferencesFromResource(R.xml.sound_settings);//这个方法是加载xml布局的if (TelephonyManager.PHONE_TYPE_CDMA != activePhoneType) {
// device is not CDMA, do not display CDMA emergency_tone
getPreferenceScreen().removePreference(findPreference(KEY_EMERGENCY_TONE));
}
if (!getResources().getBoolean(R.bool.has_silent_mode)) {
findPreference(KEY_RING_VOLUME).setDependency(null);
}
if (getResources().getBoolean(com.android.internal.R.bool.config_useFixedVolume)) {
// device with fixed volume policy, do not display volumes submenu
getPreferenceScreen().removePreference(findPreference(KEY_RING_VOLUME));
}//第一个if语句是判断设备不是CDMA，下面findPreference(KEY值)类似与实例化控件，它实例化的是KEY值，移除该控件getResoures()获得资源路径这个方法的意思是在values文件下有一个bool的xml文件，会根据屏幕的尺寸选择用哪个代码优化代码，实例化那个组建，第三个也是移除这个组建的KEY值</pre><pre name="code" class="javascript">mVibrateWhenRinging = (CheckBoxPreference) findPreference(KEY_VIBRATE);//根据KEY值实例化
mVibrateWhenRinging.setPersistent(false);
mVibrateWhenRinging.setChecked(Settings.System.getInt(resolver,
Settings.System.VIBRATE_WHEN_RINGING, 0) != 0);//在android的framwork层Settings类里面已经存好了设置好的值，根据那个值来判定!=0的boolean来给于选中还是不选中应该是:响铃时震动
mDtmfTone = (CheckBoxPreference) findPreference(KEY_DTMF_TONE);
mDtmfTone.setPersistent(false);
mDtmfTone.setChecked(Settings.System.getInt(resolver,//拨号键盘触摸音效
Settings.System.DTMF_TONE_WHEN_DIALING, 1) != 0);
mSoundEffects = (CheckBoxPreference) findPreference(KEY_SOUND_EFFECTS);
mSoundEffects.setPersistent(false);
mSoundEffects.setChecked(Settings.System.getInt(resolver,//触摸提示音
Settings.System.SOUND_EFFECTS_ENABLED, 1) != 0);
mHapticFeedback = (CheckBoxPreference) findPreference(KEY_HAPTIC_FEEDBACK);
mHapticFeedback.setPersistent(false);
mHapticFeedback.setChecked(Settings.System.getInt(resolver,//触摸时震动
Settings.System.HAPTIC_FEEDBACK_ENABLED, 1) != 0);
mLockSounds = (CheckBoxPreference) findPreference(KEY_LOCK_SOUNDS);
mLockSounds.setPersistent(false);
mLockSounds.setChecked(Settings.System.getInt(resolver,//锁屏提示音
Settings.System.LOCKSCREEN_SOUNDS_ENABLED, 1) != 0);
上面的这四个chekBox都是实例化，然后根据数据库存的东西和Settings设置好的值比较，来给于选中不选中
mRingtonePreference = findPreference(KEY_RINGTONE);//实例化铃声设置
mMultiSimRingtonePreference = findPreference(KEY_MULTISIM_RINGTONE);//实例化多SIM铃声设置if (MSimTelephonyManager.getDefault().isMultiSimEnabled()) {
//
getPreferenceScreen().removePreference(mRingtonePreference);
mRingtonePreference = null;
} else {
//if it is not multi sim, remove multi sim ringtone setting, and show ringtone setting
getPreferenceScreen().removePreference(mMultiSimRingtonePreference);
mMultiSimRingtonePreference = null;
}</span>如果支持多SIM卡，删除铃声设置，显示多SIM铃声设置/反之如果不是支持多SIM卡，删除多SIM铃声设置，并显示铃声设置mNotificationPreference = findPreference(KEY_NOTIFICATION_SOUND);</span>通知提示音class="javascript">Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
if (vibrator == null || !vibrator.hasVibrator()) {
removePreference(KEY_VIBRATE);
removePreference(KEY_HAPTIC_FEEDBACK);
}//如果震动服务为null或者，不能开启，移除响铃时震动控件的KEY和，触摸时震动的KEYif (TelephonyManager.PHONE_TYPE_CDMA == activePhoneType) {
ListPreference emergencyTonePreference =
(ListPreference) findPreference(KEY_EMERGENCY_TONE);
emergencyTonePreference.setValue(String.valueOf(Settings.Global.getInt(
resolver, Settings.Global.EMERGENCY_TONE, FALLBACK_EMERGENCY_TONE_VALUE)));
emergencyTonePreference.setOnPreferenceChangeListener(this);
}</span>//如果是CDMA设备实例化控件，从数据库中的数据给他设置上去，设置单机事件
mSoundSettings = (PreferenceGroup) findPreference(KEY_SOUND_SETTINGS);</span>//实例化铃声设置mMusicFx = mSoundSettings.findPreference(KEY_MUSICFX);</span>Intent i = new Intent(AudioEffect.ACTION_DISPLAY_AUDIO_EFFECT_CONTROL_PANEL);
PackageManager p = getPackageManager();
List<ResolveInfo> ris = p.queryIntentActivities(i, PackageManager.GET_DISABLED_COMPONENTS);
if (ris.size() <= 2) {
mSoundSettings.removePreference(mMusicFx);
}</span>铃声设置控件if (!Utils.isVoiceCapable(getActivity())) {
for (String prefKey : NEED_VOICE_CAPABILITY) {
Preference pref = findPreference(prefKey);
if (pref != null) {
getPreferenceScreen().removePreference(pref);
}
}
}</span>一个for循环来删除NEED_VOICE-CAPABILITY里面数据，数据是几个KEY值，相当于移除控件mRingtoneLookupRunnable = new Runnable() {
public void run() {
if (mRingtonePreference != null) {
updateRingtoneName(RingtoneManager.TYPE_RINGTONE, mRingtonePreference,
MSG_UPDATE_RINGTONE_SUMMARY);
}
if (mNotificationPreference != null) {
updateRingtoneName(RingtoneManager.TYPE_NOTIFICATION, mNotificationPreference,
MSG_UPDATE_NOTIFICATION_SUMMARY);
}
}
};</span>//如果SIM铃声控件部位空，更新铃声名字，因为默认有一个铃声的名字，如果通知提示音控件不为空，默认有一个名字,每次进来要设置，果然是在onResume方法中做的--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------下面是xml文件-----------------------------------声音设置
<pre name="code" class="javascript"><PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
android:title="@string/sound_settings"
android:key="sound_settings"
xmlns:settings="http://schemas.android.com/apk/res/com.android.settings">
<com.android.settings.RingerVolumePreference
android:key="ring_volume"
android:title="@string/all_volume_title"
android:dialogTitle="@string/all_volume_title"
android:persistent="false"
android:streamType="ring" />
<Preference
android:key="musicfx"
android:title="@string/musicfx_title">//铃声
<intent android:targetPackage="com.android.musicfx"
android:targetClass="com.android.musicfx.ControlPanelPicker" />
</Preference>
--------------------------------------------来电铃声和震动
<PreferenceCategory
android:key="category_calls_and_notification"
android:title="@string/sound_category_call_ringtone_vibrate_title"/>
<!-- Do not nest these, or removals in code will break -->
<com.android.settings.DefaultRingtonePreference
android:key="ringtone"
android:title="@string/ringtone_title"
android:dialogTitle="@string/ringtone_title"//来电铃声
android:persistent="false"
android:ringtoneType="ringtone" />
<CheckBoxPreference
android:key="vibrate_when_ringing"
android:title="@string/vibrate_when_ringing_title"//来电震动
android:persistent="false" />
<PreferenceScreen
android:key="multisim_ringtone"
android:title="@string/ringtone_title"
android:persistent="false">
<intent android:action="android.intent.action.MAIN"//多SIM
android:targetPackage="com.android.multisimsettings"
android:targetClass="com.android.multisimsettings.MultiSimSettingTab"/>
</PreferenceScreen>
------------------------------------------系统声音
<PreferenceCategory
android:title="@string/sound_category_system_title"/>
<!-- Do not nest these, or removals in code will break -->
<com.android.settings.DefaultRingtonePreference
android:key="notification_sound"
android:title="@string/notification_sound_title"
android:dialogTitle="@string/notification_sound_dialog_title"//默认通知提示音
android:persistent="false"
android:ringtoneType="notification" />
<CheckBoxPreference
android:key="dtmf_tone"
android:title="@string/dtmf_tone_enable_title"//拨号键盘触摸音效
android:defaultValue="true" />
<CheckBoxPreference
android:key="sound_effects"
android:title="@string/sound_effects_enable_title"//触摸提示音
android:defaultValue="true" />
<CheckBoxPreference
android:key="lock_sounds"
android:title="@string/lock_sounds_enable_title"//触屏提示音
android:defaultValue="true" />
<CheckBoxPreference
android:key="haptic_feedback"
android:title="@string/haptic_feedback_enable_title"//触摸时震动
android:defaultValue="true" />
<ListPreference
android:key="emergency_tone"
android:title="@string/emergency_tone_title"
android:entries="@array/emergency_tone_entries"
android:entryValues="@array/emergency_tone_values" />
-------------------------------dock
<!-- Dock -->
<PreferenceCategory
android:key="dock_category"
android:title="@string/dock_settings"/>//设置dock的title的
<!-- Do not nest these, or removals in code will break -->
<PreferenceScreen
android:key="dock_audio"
android:title="@string/dock_audio_settings_title">
<CheckBoxPreference
android:title="@string/bluetooth_dock_settings_a2dp"
android:key="dock_audio_media_enabled"
android:enabled="true"
/>
</PreferenceScreen>
<CheckBoxPreference
android:key="dock_sounds"
android:title="@string/dock_sounds_enable_title"
android:defaultValue="false" />
</PreferenceScreen>
二：指向OnCreatView()
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.add_layout_preference,null);
return v;
}三：指向OnCreateActivity()是PreferenceFragment的
四：指向OnResume()
@Override
public void onResume() {
super.onResume();
lookupRingtoneNames();此处是更新铃声名字和提示音名字的
IntentFilter filter = new IntentFilter(Intent.ACTION_DOCK_EVENT);
getActivity().registerReceiver(mReceiver, filter);注册一个广播接受着
}五：指向onPreferenceTreeClick单机事件，也是PreferenceFragment的单机事件，注意和Settings的继承的还是activity，所以与headClick区分
<span style="white-space:pre"> </span>if (preference == mVibrateWhenRinging) {
Settings.System.putInt(getContentResolver(), Settings.System.VIBRATE_WHEN_RINGING,//响铃时震动chekBox，根据值来选择设置进去put
mVibrateWhenRinging.isChecked() ? 1 : 0);
} else if (preference == mDtmfTone) {
Settings.System.putInt(getContentResolver(), Settings.System.DTMF_TONE_WHEN_DIALING,//拨号键盘触摸音效chekBox，根据值put进去数据库
mDtmfTone.isChecked() ? 1 : 0);
} else if (preference == mSoundEffects) {
if (mSoundEffects.isChecked()) {
mAudioManager.loadSoundEffects();
} else {
mAudioManager.unloadSoundEffects();
}
Settings.System.putInt(getContentResolver(), Settings.System.SOUND_EFFECTS_ENABLED,//触摸提示音chekBox，根据值put进去数据库
mSoundEffects.isChecked() ? 1 : 0);
} else if (preference == mHapticFeedback) {
Settings.System.putInt(getContentResolver(), Settings.System.HAPTIC_FEEDBACK_ENABLED,//触摸时震动chekBox，根据值put进去
mHapticFeedback.isChecked() ? 1 : 0);
} else if (preference == mLockSounds) {
Settings.System.putInt(getContentResolver(), Settings.System.LOCKSCREEN_SOUNDS_ENABLED,//锁屏提示音checkBox，根据值put进去
mLockSounds.isChecked() ? 1 : 0);
} else if (preference == mMusicFx) {
// let the framework fire off the intent
return false;
} else if (preference == mDockAudioSettings) {
int dockState = mDockIntent != null
? mDockIntent.getIntExtra(Intent.EXTRA_DOCK_STATE, 0)
: Intent.EXTRA_DOCK_STATE_UNDOCKED;
if (dockState == Intent.EXTRA_DOCK_STATE_UNDOCKED) {
showDialog(DIALOG_NOT_DOCKED);
} else {
boolean isBluetooth = mDockIntent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE) != null;
if (isBluetooth) {
Intent i = new Intent(mDockIntent);
i.setAction(DockEventReceiver.ACTION_DOCK_SHOW_UI);
i.setClass(getActivity(), DockEventReceiver.class);
getActivity().sendBroadcast(i);
} else {
PreferenceScreen ps = (PreferenceScreen)mDockAudioSettings;
Bundle extras = ps.getExtras();
extras.putBoolean("checked",
Settings.Global.getInt(getContentResolver(),
Settings.Global.DOCK_AUDIO_MEDIA_ENABLED, 0) == 1);
super.onPreferenceTreeClick(ps, ps);
}
}--------------------------------------这一段，好像没实例化?
} else if (preference == mDockSounds) {
Settings.Global.putInt(getContentResolver(), Settings.Global.DOCK_SOUNDS_ENABLED,
mDockSounds.isChecked() ? 1 : 0);
} else if (preference == mDockAudioMediaEnabled) {
Settings.Global.putInt(getContentResolver(), Settings.Global.DOCK_AUDIO_MEDIA_ENABLED,
mDockAudioMediaEnabled.isChecked() ? 1 : 0);
} else if (mMultiSimRingtonePreference != null &&-------------------------------------多SIM铃声设置
preference == mMultiSimRingtonePreference) {
Intent intent = mMultiSimRingtonePreference.getIntent();
intent.putExtra(SelectSubscription.PACKAGE,
"com.android.multisimsettings");
intent.putExtra(SelectSubscription.TARGET_CLASS,
"com.android.multisimsettings.MultiSimSoundSettings");
startActivity(intent);
}
return true;
}六：此时发现音量，手机铃声，默认系统提示音等等不是chekBox的控件，没有写单机事件，但是还是会弹出对话框，按理说应该是在五的时候写单机事件，设定跳转，仔细研究才发现原来是自己定义了控件，来分析XML文件
<com.android.settings.RingerVolumePreference这个就是自己定义的类，因为当前的属性满足不来，所以就自己定义一个类
android:key="ring_volume"
android:title="@string/all_volume_title"
android:dialogTitle="@string/all_volume_title"//这个就是标题：音量
android:persistent="false"
android:streamType="ring" />
<Preference
android:key="musicfx"
android:title="@string/musicfx_title">
<intent android:targetPackage="com.android.musicfx"
android:targetClass="com.android.musicfx.ControlPanelPicker" />
</Preference>
<PreferenceCategory
android:key="category_calls_and_notification"
android:title="@string/sound_category_call_ringtone_vibrate_title"/>此时再看音量：RinferVolumePreference这个音量类
RingerVolumePreference.java类继承了VolumePreference直接定位到构造方法
<pre name="code" class="javascript">public RingerVolumePreference(Context context, AttributeSet attrs) {
super(context, attrs);
// The always visible seekbar is for ring volume
setStreamType(AudioManager.STREAM_RING);
setDialogLayoutResource(R.layout.preference_dialog_ringervolume);//这个地方就是加载xml文件的布局
//setDialogIcon(R.drawable.ic_settings_sound);
mSeekBarVolumizer = new SeekBarVolumizer[SEEKBAR_ID.length];
mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
}
XML布局：
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
----------------------------------------------------------------------------------------最外层是滚动视图
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center_horizontal"
android:paddingBottom="12dip"
android:paddingTop="12dip">
<ImageView android:id="@android:id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="20dip"
android:visibility="gone"
android:contentDescription="@null" />
<!-- Dummy -->
<SeekBar android:id="@*android:id/seekbar"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:visibility="gone" />
<TextView
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingStart="16dip"
android:layout_gravity="start"
android:text="@string/volume_media_description"
/>
------------------------------------------------------------------------------------------上面是一个linearLayout主要是把下面的四个布局加到这个里面
<!-- Used for the media volume -->
<LinearLayout
android:id="@+id/media_section"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="8dip"
android:orientation="horizontal"
android:gravity="center_vertical">
<!--wangjiaying add focus for SeekBar start-->
<ImageView android:id="@+id/media_mute_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="16dip"
android:background="?android:attr/selectableItemBackground"
android:clickable="false"
android:focusable="false"
android:contentDescription="@string/volume_media_mute"
/>
<SeekBar android:id="@+id/media_volume_seekbar"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:paddingTop="2dip"
android:layout_marginEnd="@dimen/volume_seekbar_side_margin"
android:background="?android:attr/selectableItemBackground"
android:clickable="true"
android:focusable="true"/>
<!--wangjiaying add focus for SeekBar end-->
</LinearLayout>
</LinearLayout>
--------------------------------------------------------------------------------------------其中一个的媒体的
<!-- Used for the ringer/notification volume -->
<LinearLayout
android:id="@+id/ringer_section"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/ringer_description_text"
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dip"
android:paddingStart="16dip"
android:layout_gravity="start"
android:text="@string/volume_ring_description"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="8dip"
android:orientation="horizontal"
android:gravity="center_vertical">
<!--wangjiaying add focus for SeekBar start-->
<ImageView android:id="@+id/ringer_mute_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="16dip"
android:background="?android:attr/selectableItemBackground"
android:contentDescription="@string/volume_ring_mute"
android:clickable="false"
android:focusable="false"
/>
<SeekBar android:id="@+id/ringer_volume_seekbar"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:paddingTop="2dip"
android:layout_marginEnd="@dimen/volume_seekbar_side_margin"
android:background="?android:attr/selectableItemBackground"
android:clickable="true"
android:focusable="true"
/>
<!--wangjiaying add focus for SeekBar end-->
</LinearLayout>
</LinearLayout>
--------------------------------------------------------------------------------------------------ringer的
<!-- Used for the notification volume -->
<LinearLayout
android:id="@+id/notification_section"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/notification_description_text"
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dip"
android:paddingStart="16dip"
android:layout_gravity="start"
android:text="@string/volume_notification_description"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="8dip"
android:orientation="horizontal"
android:gravity="center_vertical">
<!--wangjiaying add focus for SeekBar start-->
<ImageView android:id="@+id/notification_mute_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="16dip"
android:background="?android:attr/selectableItemBackground"
android:contentDescription="@string/volume_notification_mute"
android:clickable="false"
android:focusable="false"
/>
<SeekBar android:id="@+id/notification_volume_seekbar"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:paddingTop="2dip"
android:layout_marginEnd="@dimen/volume_seekbar_side_margin"
android:background="?android:attr/selectableItemBackground"
android:clickable="true"
android:focusable="true"/>
<!--wangjiaying add focus for SeekBar end-->
</LinearLayout>
</LinearLayout>
--------------------------------------------------------------------------------------------------铃声和通知的
<!-- Used for the alarm volume -->
<LinearLayout
android:id="@+id/alarm_section"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dip"
android:paddingStart="16dip"
android:layout_gravity="start"
android:text="@string/volume_alarm_description"
/>
<!-- Used for the alarm volume -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="8dip"
android:orientation="horizontal"
android:gravity="center_vertical">
<!--wangjiaying add focus for SeekBar start-->
<ImageView android:id="@+id/alarm_mute_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="16dip"
android:background="?android:attr/selectableItemBackground"
android:contentDescription="@string/volume_alarm_mute"
android:clickable="false"
android:focusable="false"
/>
<SeekBar android:id="@+id/alarm_volume_seekbar"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:paddingTop="2dip"
android:layout_marginEnd="@dimen/volume_seekbar_side_margin"
android:background="?android:attr/selectableItemBackground"
android:clickable="true"
android:focusable="true"/>
<!--wangjiaying add focus for SeekBar end-->
</LinearLayout>
</LinearLayout>
-------------------------------------------------------------------------------------------------------闹钟的设置
</LinearLayout>
</ScrollView>下面定位到onBindDialogView
for (int i = 0; i < SEEKBAR_ID.length; i++) {
SeekBar seekBar = (SeekBar) view.findViewById(SEEKBAR_ID[i]);
mSeekBars[i] = seekBar;
if (SEEKBAR_TYPE[i] == AudioManager.STREAM_MUSIC) {
mSeekBarVolumizer[i] = new SeekBarVolumizer(getContext(), seekBar,
SEEKBAR_TYPE[i], getMediaVolumeUri(getContext()));
} else {
mSeekBarVolumizer[i] = new SeekBarVolumizer(getContext(), seekBar,
SEEKBAR_TYPE[i]);
}
}
mSeekBars[0].setOnKeyListener(new View.OnKeyListener(){
public boolean onKey(View v, int keyCode, KeyEvent event) {
boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN);
switch (keyCode) {
case 21:
if (isdown) {
mSeekBarVolumizer[0].changeVolumeBy(-1);
}
return true;
case 22:
if (isdown) {
mSeekBarVolumizer[0].changeVolumeBy(1);
}
return true;
case KeyEvent.KEYCODE_VOLUME_MUTE:
if (isdown) {
mSeekBarVolumizer[0].muteVolume();
}
return true;
default:
return false;
}
}});
mSeekBars[2].setOnKeyListener(new View.OnKeyListener(){
public boolean onKey(View v, int keyCode, KeyEvent event) {
boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN);
switch (keyCode) {
case 21:
if (isdown) {
mSeekBarVolumizer[2].changeVolumeBy(-1);
}
return true;
case 22:
if (isdown) {
mSeekBarVolumizer[2].changeVolumeBy(1);
}
return true;
case KeyEvent.KEYCODE_VOLUME_MUTE:
if (isdown) {
mSeekBarVolumizer[2].muteVolume();
}
return true;
default:
return false;
}
}});
mSeekBars[1].setOnKeyListener(new View.OnKeyListener(){
public boolean onKey(View v, int keyCode, KeyEvent event) {
boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN);
switch (keyCode) {
case 21:
if (isdown) {
mSeekBarVolumizer[1].changeVolumeBy(-1);
}
return true;
case 22:
if (isdown) {
mSeekBarVolumizer[1].changeVolumeBy(1);
}
return true;
case KeyEvent.KEYCODE_VOLUME_MUTE:
if (isdown) {
mSeekBarVolumizer[1].muteVolume();
}
return true;
default:
return false;
}
}});
mSeekBars[3].setOnKeyListener(new View.OnKeyListener(){
public boolean onKey(View v, int keyCode, KeyEvent event) {
boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN);
switch (keyCode) {
case 21:
if (isdown) {
mSeekBarVolumizer[3].changeVolumeBy(-1);
}
return true;
case 22:
if (isdown) {
mSeekBarVolumizer[3].changeVolumeBy(1);
}
return true;
case KeyEvent.KEYCODE_VOLUME_MUTE:
if (isdown) {
mSeekBarVolumizer[3].muteVolume();
}
return true;
default:
return false;
}
}});
// Register callbacks for mute/unmute buttons
for (int i = 0; i < mCheckBoxes.length; i++) {
ImageView checkbox = (ImageView) view.findViewById(CHECKBOX_VIEW_ID[i]);
mCheckBoxes[i] = checkbox;
}
// Load initial states from AudioManager
updateSlidersAndMutedStates();
// Listen for updates from AudioManager
if (mRingModeChangedReceiver == null) {
final IntentFilter filter = new IntentFilter();
filter.addAction(AudioManager.RINGER_MODE_CHANGED_ACTION);
mRingModeChangedReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if (AudioManager.RINGER_MODE_CHANGED_ACTION.equals(action)) {
mHandler.sendMessage(mHandler.obtainMessage(MSG_RINGER_MODE_CHANGED, intent
.getIntExtra(AudioManager.EXTRA_RINGER_MODE, -1), 0));
}
}
};
getContext().registerReceiver(mRingModeChangedReceiver, filter);
}
boolean useMasterVolume = getContext().getResources().
getBoolean(com.android.internal.R.bool.config_useMasterVolume);
if (useMasterVolume) {
// If config_useMasterVolume is true, all streams are treated as STREAM_MASTER.
// So hide all except a stream.
int id;
if (Utils.isVoiceCapable(getContext())) {
id = R.id.ringer_section;
} else {
id = R.id.media_section;
}
for (int i = 0; i < SEEKBAR_SECTION_ID.length; i++) {
if (SEEKBAR_SECTION_ID[i] != id) {
view.findViewById(SEEKBAR_SECTION_ID[i]).setVisibility(View.GONE);
}
}
} else {
// Disable either ringer+notifications or notifications
int id;
if (!Utils.isVoiceCapable(getContext())) {
id = R.id.ringer_section;
} else {
id = R.id.notification_section;
}
View hideSection = view.findViewById(id);
hideSection.setVisibility(View.GONE);
}
}
再回过头来看手机铃声DefaultRingtonePreference这个类，默认提示音也同样是这个类
class DefaultRingtonePreference extends RingtonePreferencepublic class DefaultRingtonePreference extends RingtonePreference {
private static final String TAG = "DefaultRingtonePreference";
public DefaultRingtonePreference(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onPrepareRingtonePickerIntent(Intent ringtonePickerIntent) {
super.onPrepareRingtonePickerIntent(ringtonePickerIntent);
/*
* Since this preference is for choosing the default ringtone, it
* doesn't make sense to show a 'Default' item.
*/
ringtonePickerIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_DEFAULT, false);
}
@Override
protected void onSaveRingtone(Uri ringtoneUri) {
RingtoneManager.setActualDefaultRingtoneUri(getContext(), getRingtoneType(), ringtoneUri);
}
@Override
protected Uri onRestoreRingtone() {
return RingtoneManager.getActualDefaultRingtoneUri(getContext(), getRingtoneType());
}
}
到此，大致流程走完，具体的还要再看下去！
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