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{@Overridepublic 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ringtongintent.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activitystartActivityForResult(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@Overrideprotected 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);}}<uses-permission android:name="android.permission.INTERNET"/><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/><uses-permission android:name="android.permission.WRITE_SETTINGS"/>
