Media开发之铃声设置(RingtoneManager)

public class Media_RingTongActivity extends Activity {        //定义三个按钮        private Button mRingtongButton;        private Button mAlarmButton;        private Button mNotificationButton;                //定义类型        private static final int RingtongButton=0;        private static final int AlarmButton=1;        private static final int NotificationButton=2;                //铃声文件夹        private String strRingtongFolder="/sdcard/media/ringtones";        private String strAlarmFolder="/sdcard/media/alarms";        private String strNotificationFolder="/sdcard/media/notifications";            @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        mRingtongButton=(Button)findViewById(R.id.myRingtongButton);        mRingtongButton.setOnClickListener(new myRingtongButtonListener());        mAlarmButton=(Button)findViewById(R.id.myAlarmButton);        mAlarmButton.setOnClickListener(new myAlarmButtonListener());        mNotificationButton=(Button)findViewById(R.id.myNotificationButton);        mNotificationButton.setOnClickListener(new myNotificationButtonListener());    }        //设置来电铃声监听器    private class myRingtongButtonListener implements OnClickListener{                @Override                public void onClick(View v) {                        if(isFolder(strRingtongFolder)){                                //打开系统铃声设置                                Intent intent=new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);                                intent.putExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI, true);                                //类型为来电ringtong                                intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_RINGTONE);                                //设置显示的题目                                intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "设置来电的铃声");                                //当设置完成之后返回到当前的activity                                startActivityForResult(intent, RingtongButton);                        }                }    }        //设置闹钟铃声监听器    private class myAlarmButtonListener implements OnClickListener{                @Override                public void onClick(View v) {                        if(isFolder(strAlarmFolder)){                                Intent intent=new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);                                intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_ALARM);                                intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "设置闹铃铃声");                                startActivityForResult(intent, AlarmButton);                        }                }     }        //设置通知铃声监听器    private class myNotificationButtonListener implements OnClickListener{                @Override                public void onClick(View v) {                        if(isFolder(strNotificationFolder)){                                Intent intent=new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);                                intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_NOTIFICATION);                                intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "设置通知铃声");                                startActivityForResult(intent, NotificationButton);                        }                }    }    //检查是否存在指定的文件夹，如果不存在就创建    private boolean isFolder(String strFolder){            boolean tmp = false;                File f1 = new File(strFolder);                if (!f1.exists())                {                        if (f1.mkdirs())                        {                                tmp = true;                        }                        else                        {                                tmp = false;                        }                }                else                {                        tmp = true;                }                return tmp;    }        @Override        protected void onActivityResult(int requestCode, int resultCode, Intent data) {                if(resultCode!=RESULT_OK){                        return;                }                switch(requestCode){                        case RingtongButton:                                try {                                         //得到我们选择的铃声                                         Uri pickedUri=data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);                                         //将我们选择的铃声选择成默认                                         if(pickedUri!=null){                                                 RingtoneManager.setActualDefaultRingtoneUri(Media_RingTongActivity.this, RingtoneManager.TYPE_RINGTONE, pickedUri);                                         }                                } catch (Exception e) {                                        e.printStackTrace();                                }                                 break;                        case AlarmButton:                                try {                                         //得到我们选择的铃声                                         Uri pickedUri=data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);                                         //将我们选择的铃声选择成默认                                         if(pickedUri!=null){                                                 RingtoneManager.setActualDefaultRingtoneUri(Media_RingTongActivity.this, RingtoneManager.TYPE_ALARM, pickedUri);                                         }                                } catch (Exception e) {                                        e.printStackTrace();                                }                                break;                        case NotificationButton:                                try {                                         //得到我们选择的铃声                                         Uri pickedUri=data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);                                         //将我们选择的铃声选择成默认                                         if(pickedUri!=null){                                                 RingtoneManager.setActualDefaultRingtoneUri(Media_RingTongActivity.this, RingtoneManager.TYPE_NOTIFICATION, pickedUri);                                         }                                } catch (Exception e) {                                        e.printStackTrace();                                }                                break;                }                super.onActivityResult(requestCode, resultCode, data);        }}

1.布局文件就是三个按钮，没什么好说的了.

2.在真机盖世兔上测试了一下，可以运行，在模拟器测试的童鞋要注意了，每次把音频文件push到sdcard中得时候,必须重启模拟器,模拟器才会应用设置,不然是检索不到的哦,这点我后面才发现的.

3.系统的原始声音存放在/system/media/audio/文件中

4.最后一点不要忘记给应用程序加权限了： 

    <uses-permission android:name="android.permission.INTERNET"/>    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>    <uses-permission android:name="android.permission.WRITE_SETTINGS"/>