Android中铃声总结源码

　　最近研究源码程序，改了改手机短信铃声的源码，总结了下铃声的代码，写个activity继承PreferenceActivity有：手机短信铃声，手机铃声，闹钟铃声，还有sdcard中的铃声，通过选择相应的铃声，然后读取到xml文件里面，通过读取preference.xml文件，intent传个参数进去intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, phoneUri);打开对话框的时候就默认选中上次被选中的音乐。程序流程：在onCreate（）方法中加入addPreferencesFromResource(R.xml.preferences);加载xml文件。@Override重写onPreferenceTreeClick（）方法，处理点击事件，在打开对话框铃声的时候，先读取xml文件，判断是否有值，如果有值，就传值intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, phoneUri);然后进行选择铃声。通过onActivityResult（）接受传递过来的uri，系统默认的铃声是通过data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);方法来获取uri的，而sdcard中的铃声通过Uri pickedUri = data.getData();来获得选中的uri的，再然后通过editor.commit(); 来提交接受过来的uri和音乐的名字整个流程大概就是这样。
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　　下面代码附上：

　　在SoundSettingActivity这个工程下面：

　　一、在com.cn.android.daming包的SoundSettingMainActivity.java类中的代码：

　　<span style="font-size:16px;color:#000000;">package com.cn.android.daming;
　　import android.content.Intent;
　　import android.content.SharedPreferences;
　　import android.media.Ringtone;
　　import android.media.RingtoneManager;
　　import android.net.Uri;
　　import android.os.Bundle;
　　import android.preference.Preference;
　　import android.preference.PreferenceActivity;
　　import android.preference.PreferenceManager;
　　import android.preference.PreferenceScreen;
　　public class SoundSettingMainActivity extends PreferenceActivity {
　　private static final int SMS_RINGTONE_PICKED = 1;
　　private static final int PHONE_RINGTONE_PICKED = 2;
　　private static final int ALARM_RINGTONE_PICKED = 3;
　　private static final int SDCARD_RINGTONE_PICKED = 4;
　　public static final String NOTIFICATION_RINGTONE = "pref_notification_ringtone";
　　public static final String NOTIFICATION_RINGTONE_TITLE_NAME = "pref_notification_ringtone_name";
　　public static final String PHONE_RINGTONE = "pref_phone_ringtone";
　　public static final String PHONE_RINGTONE_TITLE_NAME = "pref_phone_ringtone_title_name";
　　public static final String ALARM_RINGTONE = "pref_alarm_ringtone";
　　public static final String ALARM_RINGTONE_TITLE_NAME = "pref_alarm_ringtone_title_name";
　　public static final String SDCARD_RINGTONE = "pref_sdcard_ringtone";
　　public static final String SDCARD_RINGTONE_TITLE_NAME = "pref_sdcard_ringtone_title_name";
　　private String notificationStr;
　　private String phoneStr;
　　private String alarmStr;
　　private String sdcardStr;
　　private Preference mMmsSoundsPref;
　　private Preference mPhoneSoundsPref;
　　private Preference mAlarmSoundsPref;
　　private Preference mSdcardSoundsPref;
　　@Override
　　public void onCreate(Bundle savedInstanceState) {
　　super.onCreate(savedInstanceState);
　　addPreferencesFromResource(R.xml.preferences);
　　setMessagePreferences();
　　setDefaultPreferences();
　　}
　　private void setMessagePreferences() {
　　mMmsSoundsPref = findPreference("pref_sms_ringtone");
　　mPhoneSoundsPref = findPreference("pref_phone_ringtone");
　　mAlarmSoundsPref = findPreference("pref_alarm_ringtone");
　　mSdcardSoundsPref = findPreference("pref_sdcard_ringtone");
　　}
　　private void setDefaultPreferences(){
　　SharedPreferences innersharedPreferences = PreferenceManager.getDefaultSharedPreferences(SoundSettingMainActivity.this);
　　String notificationRingtoneTitleName = innersharedPreferences.getString(NOTIFICATION_RINGTONE_TITLE_NAME, null);
　　if(notificationRingtoneTitleName!=null){
　　mMmsSoundsPref.setSummary(notificationRingtoneTitleName);
　　}else{
　　mMmsSoundsPref.setSummary(getString(R.string.pref_summary_notification_ringtone));
　　}
　　String phoneRingtoneTitleName = innersharedPreferences.getString(PHONE_RINGTONE_TITLE_NAME, null);
　　if(phoneRingtoneTitleName!=null){
　　mPhoneSoundsPref.setSummary(phoneRingtoneTitleName);
　　}else{
　　mPhoneSoundsPref.setSummary(getString(R.string.pref_summary_phone_ringtone));
　　}
　　String alarmRingtoneTitleName = innersharedPreferences.getString(ALARM_RINGTONE_TITLE_NAME, null);
　　if(alarmRingtoneTitleName!=null){
　　mAlarmSoundsPref.setSummary(alarmRingtoneTitleName);
　　}else{
　　mAlarmSoundsPref.setSummary(getString(R.string.pref_summary_alarm_ringtone));
　　}
　　String sdcardRingtoneTitleName = innersharedPreferences.getString(SDCARD_RINGTONE_TITLE_NAME, null);
　　if(sdcardRingtoneTitleName!=null){
　　mSdcardSoundsPref.setSummary(sdcardRingtoneTitleName);
　　}else{
　　mSdcardSoundsPref.setSummary(getString(R.string.pref_summary_sdcard_ringtone));
　　}
　　}
　　@Override
　　public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen,
　　Preference preference) {
　　if (preference == mMmsSoundsPref){
　　doPickSmsRingtone();
　　}
　　else if(preference == mPhoneSoundsPref){
　　doPickPhoneRingtone();
　　}
　　else if(preference == mAlarmSoundsPref){
　　doPickAlarmRingtone();
　　}
　　else if(preference == mSdcardSoundsPref){
　　doPickSdcardRingtone();
　　}
　　return super.onPreferenceTreeClick(preferenceScreen, preference);
　　}
　　private void doPickSmsRingtone(){
　　SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
　　notificationStr = sharedPreferences.getString(NOTIFICATION_RINGTONE, null);
　　Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
　　// Allow user to pick 'Default'
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_DEFAULT, true);
　　// Show only ringtones
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_NOTIFICATION);
　　//set the default Notification value
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_DEFAULT_URI, RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION));
　　// Don't show 'Silent'
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_SILENT, true);
　　Uri notificationUri;
　　if (notificationStr != null) {
　　notificationUri = Uri.parse(notificationStr);
　　// Put checkmark next to the current ringtone for this contact
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, notificationUri);
　　} else {
　　// Otherwise pick default ringtone Uri so that something is selected.
　　notificationUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
　　// Put checkmark next to the current ringtone for this contact
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, notificationUri);
　　}
　　// Launch!
　　startActivityForResult(intent, SMS_RINGTONE_PICKED);
　　}
　　private void doPickPhoneRingtone(){
　　SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
　　phoneStr = sharedPreferences.getString(PHONE_RINGTONE, null);
　　Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
　　// Allow user to pick 'Default'
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_DEFAULT, true);
　　// Show only ringtones
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_RINGTONE);
　　//set the default Notification value
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_DEFAULT_URI, RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE));
　　// Don't show 'Silent'
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_SILENT, true);
　　Uri phoneUri;
　　if (phoneStr != null) {
　　phoneUri = Uri.parse(phoneStr);
　　// Put checkmark next to the current ringtone for this contact
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, phoneUri);
　　} else {
　　// Otherwise pick default ringtone Uri so that something is selected.
　　phoneUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
　　// Put checkmark next to the current ringtone for this contact
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, phoneUri);
　　}
　　startActivityForResult(intent, PHONE_RINGTONE_PICKED);
　　}
　　private void doPickAlarmRingtone(){
　　SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
　　alarmStr = sharedPreferences.getString(ALARM_RINGTONE, null);
　　Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
　　// Allow user to pick 'Default'
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_DEFAULT, true);
　　// Show only ringtones
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_ALARM);
　　//set the default Notification value
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_DEFAULT_URI, RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM));
　　// Don't show 'Silent'
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_SHOW_SILENT, true);
　　Uri alarmUri;
　　if (alarmStr != null) {
　　alarmUri = Uri.parse(alarmStr);
　　// Put checkmark next to the current ringtone for this contact
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, alarmUri);
　　} else {
　　// Otherwise pick default ringtone Uri so that something is selected.
　　alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
　　// Put checkmark next to the current ringtone for this contact
　　intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, alarmUri);
　　}
　　startActivityForResult(intent, ALARM_RINGTONE_PICKED);
　　}
　　private void doPickSdcardRingtone(){
　　SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
　　sdcardStr = sharedPreferences.getString(SDCARD_RINGTONE, null);
　　Uri sdcardUri = null;
　　if (sdcardStr != null) {
　　sdcardUri = Uri.parse(sdcardStr);
　　}
　　Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT);
　　innerIntent.setType("audio/*");
　　//you could lookup the framework the type of audio,if you don`t want use the Recorder use the note code
　　// innerIntent.setType("audio/aac");
　　// innerIntent.setType("audio/mp3");
　　// innerIntent.setType("audio/midi");
　　// Put checkmark next to the current ringtone for this contact
　　innerIntent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, sdcardUri);
　　Intent wrapperIntent = Intent.createChooser(innerIntent, null);
　　startActivityForResult(wrapperIntent, SDCARD_RINGTONE_PICKED);
　　}
　　@Override
　　protected void onResume() {
　　setDefaultPreferences();
　　super.onResume();
　　}
　　@Override
　　protected void onActivityResult(int requestCode, int resultCode, Intent data) {
　　SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
　　SharedPreferences.Editor editor = sharedPreferences.edit();
　　if (resultCode != RESULT_OK) {
　　return;
　　}
　　switch (requestCode) {
　　case SMS_RINGTONE_PICKED:{
　　Uri pickedUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
　　if(null == pickedUri){
　　editor.putString(NOTIFICATION_RINGTONE_TITLE_NAME, getString(R.string.select_ringtone_slient));
　　editor.putString(NOTIFICATION_RINGTONE, null);
　　editor.commit();
　　}else{
　　Ringtone ringtone = RingtoneManager.getRingtone(SoundSettingMainActivity.this, pickedUri);
　　String strRingtone = ringtone.getTitle(SoundSettingMainActivity.this);
　　editor.putString(NOTIFICATION_RINGTONE_TITLE_NAME, strRingtone);
　　editor.putString(NOTIFICATION_RINGTONE, pickedUri.toString());
　　editor.commit();
　　}
　　break;
　　}
　　case PHONE_RINGTONE_PICKED:{
　　Uri pickedUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
　　if(null == pickedUri){
　　editor.putString(PHONE_RINGTONE_TITLE_NAME, getString(R.string.select_ringtone_slient));
　　editor.putString(PHONE_RINGTONE, null);
　　editor.commit();
　　}else{
　　phoneStr = pickedUri.toString();
　　Ringtone ringtone = RingtoneManager.getRingtone(SoundSettingMainActivity.this, pickedUri);
　　String strRingtone = ringtone.getTitle(SoundSettingMainActivity.this);
　　editor.putString(PHONE_RINGTONE_TITLE_NAME, strRingtone);
　　editor.putString(PHONE_RINGTONE, pickedUri.toString());
　　editor.commit();
　　}
　　break;
　　}
　　case ALARM_RINGTONE_PICKED:{
　　Uri pickedUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
　　if(null == pickedUri){
　　editor.putString(ALARM_RINGTONE_TITLE_NAME, getString(R.string.select_ringtone_slient));
　　editor.putString(ALARM_RINGTONE, null);
　　editor.commit();
　　}else{
　　Ringtone ringtone = RingtoneManager.getRingtone(SoundSettingMainActivity.this, pickedUri);
　　String strRingtone = ringtone.getTitle(SoundSettingMainActivity.this);
　　editor.putString(ALARM_RINGTONE_TITLE_NAME, strRingtone);
　　editor.putString(ALARM_RINGTONE, pickedUri.toString());
　　editor.commit();
　　}
　　break;
　　}
　　case SDCARD_RINGTONE_PICKED:{
　　Uri pickedUri = data.getData();
　　if(null != pickedUri){
　　notificationStr = pickedUri.toString();
　　Ringtone ringtone = RingtoneManager.getRingtone(SoundSettingMainActivity.this, pickedUri);
　　String strRingtone = ringtone.getTitle(SoundSettingMainActivity.this);
　　editor.putString(SDCARD_RINGTONE_TITLE_NAME, strRingtone);
　　editor.putString(SDCARD_RINGTONE, pickedUri.toString());
　　editor.commit();
　　}
　　break;
　　}
　　default:break;
　　}
　　}
　　}</span>
　　

转载:http://www.adobex.com/android/source/details/00000215.htm