android-铃声的设置与播放

在android系统中，不同铃声存放的铃声路径：

/system/media/audio/ringtones        来电铃声
 /system/media/audio/notifications        短信通知铃声
 /system/media/audio/alarms        闹钟铃声

铃声的设置：

    import java.io.File;  

    import android.app.Activity;
    import android.content.Intent;
    import android.media.RingtoneManager;
    import android.net.Uri;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    public class Activity01 extends Activity
    {
        /* 3个按钮 */
        private Button mButtonRingtone;
        private Button mButtonAlarm;
        private Button mButtonNotification;  

        /* 自定义的类型 */
        public static final int ButtonRingtone          = 0;
        public static final int ButtonAlarm             = 1;
        public static final int ButtonNotification      = 2;
        /* 铃声文件夹 */
        private String strRingtoneFolder = "/sdcard/music/ringtones";
        private String strAlarmFolder = "/sdcard/music/alarms";
        private String strNotificationFolder = "/sdcard/music/notifications";  

        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);  

            mButtonRingtone = (Button) findViewById(R.id.ButtonRingtone);
            mButtonAlarm = (Button) findViewById(R.id.ButtonAlarm);
            mButtonNotification = (Button) findViewById(R.id.ButtonNotification);
            /* 设置来电铃声 */
            mButtonRingtone.setOnClickListener(new Button.OnClickListener()
            {
                @Override
                public void onClick(View arg0)
                {
                    if (bFolder(strRingtoneFolder))
                    {
                        //打开系统铃声设置
                        Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
                        //类型为来电RINGTONE
                        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_RINGTONE);
                        //设置显示的title
                        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "设置来电铃声");
                        //当设置完成之后返回到当前的Activity
                        startActivityForResult(intent, ButtonRingtone);
                    }
                }
            });
            /* 设置闹钟铃声 */
            mButtonAlarm.setOnClickListener(new Button.OnClickListener()
            {
                @Override
                public void onClick(View arg0)
                {
                    if (bFolder(strAlarmFolder))
                    {
                        //打开系统铃声设置
                        Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
                        //设置铃声类型和title
                        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_ALARM);
                        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "设置闹铃铃声");
                        //当设置完成之后返回到当前的Activity
                        startActivityForResult(intent, ButtonAlarm);
                    }
                }
            });
            /* 设置通知铃声 */
            mButtonNotification.setOnClickListener(new Button.OnClickListener()
            {
                @Override
                public void onClick(View arg0)
                {
                    if (bFolder(strNotificationFolder))
                    {
                        //打开系统铃声设置
                        Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
                        //设置铃声类型和title
                        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_NOTIFICATION);
                        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "设置通知铃声");
                        //当设置完成之后返回到当前的Activity
                        startActivityForResult(intent, ButtonNotification);
                    }
                }
            });
        }
        /* 当设置铃声之后的回调函数 */
        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data)
        {
            // TODO Auto-generated method stub
            if (resultCode != RESULT_OK)
            {
                return;
            }
            switch (requestCode)
            {
                case ButtonRingtone:
                    try
                    {
                        //得到我们选择的铃声
                        Uri pickedUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
                        //将我们选择的铃声设置成为默认
                        if (pickedUri != null)
                        {
                            RingtoneManager.setActualDefaultRingtoneUri(Activity01.this, RingtoneManager.TYPE_RINGTONE, pickedUri);
                        }
                    }
                    catch (Exception e)
                    {
                    }
                    break;
                case ButtonAlarm:
                    try
                    {
                        //得到我们选择的铃声
                        Uri pickedUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
                        //将我们选择的铃声设置成为默认
                        if (pickedUri != null)
                        {
                            RingtoneManager.setActualDefaultRingtoneUri(Activity01.this, RingtoneManager.TYPE_ALARM, pickedUri);
                        }
                    }
                    catch (Exception e)
                    {
                    }
                    break;
                case ButtonNotification:
                    try
                    {
                        //得到我们选择的铃声
                        Uri pickedUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
                        //将我们选择的铃声设置成为默认
                        if (pickedUri != null)
                        {
                            RingtoneManager.setActualDefaultRingtoneUri(Activity01.this, RingtoneManager.TYPE_NOTIFICATION, pickedUri);
                        }
                    }
                    catch (Exception e)
                    {
                    }
                    break;
            }
            super.onActivityResult(requestCode, resultCode, data);
        }
        //检测是否存在指定的文件夹
        //如果不存在则创建
        private boolean bFolder(String strFolder)
        {
            boolean btmp = false;
            File f = new File(strFolder);
            if (!f.exists())
            {
                if (f.mkdirs())
                {
                    btmp = true;
                }
                else
                {
                    btmp = false;
                }
            }
            else
            {
                btmp = true;
            }
            return btmp;
        }
    }  

铃声的播放：

    player = new MediaPlayer();
         try{
         player.setDataSource(context, pickUri);
         }catch(Exception e){
          e.printStackTrace();
         }
        final AudioManager  audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
        if(audioManager.getStreamVolume(AudioManager.STREAM_ALARM)!=0){
           player.setAudioStreamType(AudioManager.STREAM_ALARM);
           player.setLooping(true);
           try {
        player.prepare();
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
           player.start();
        }