Media开发之铃声设置(RingtoneManager)

    
搞个这么个小东西费了4个小时，还好问题解决了。

package rocka.media.ringtong;

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.view.View.OnClickListener;
import android.widget.Button;

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;
    }
//设置铃声之后的回调函数
	@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
					 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"/>