具體實現代碼：
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 {
//定義三個按鈕
private Button mRingtongButton;
private Button mAlarmButton;
private Button mNotificationButton;
//定義類型
private static final int RingtongButton=0;
private static final int AlarmButton=1;
private static final int NotificationButton=2;
//鈴聲文件夾
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());
}
//設置來電鈴聲監聽器
private class myRingtongButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
if(isFolder(strRingtongFolder)){
//打開系統鈴聲設置
Intent intent=new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
intent.putExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI, true);
//類型為來電ringtong
intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_RINGTONE);
//設置顯示的題目
intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "設置來電的鈴聲");
//當設置完成之後返回到當前的activity
startActivityForResult(intent, RingtongButton);
}
}
}
//設置鬧鐘鈴聲監聽器
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, "設置鬧鈴鈴聲");
startActivityForResult(intent, AlarmButton);
}
}
}
//設置通知鈴聲監聽器
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, "設置通知鈴聲");
startActivityForResult(intent, NotificationButton);
}
}
}
//檢查是否存在指定的文件夾，如果不存在就創建
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;
}
//設置鈴聲之後的回調函數
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode!=RESULT_OK){
return;
}
switch(requestCode){
case RingtongButton:
try {
//得到選擇的鈴聲
Uri pickedUri=data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
//將選擇的鈴聲選擇成默認
if(pickedUri!=null){
RingtoneManager.setActualDefaultRingtoneUri(Media_RingTongActivity.this, RingtoneManager.TYPE_RINGTONE, pickedUri);
}
} catch (Exception e) {
e.printStackTrace();
}
break;
case AlarmButton:
try {
//得到選擇的鈴聲
Uri pickedUri=data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
//將我們選擇的鈴聲選擇成默認
if(pickedUri!=null){
RingtoneManager.setActualDefaultRingtoneUri(Media_RingTongActivity.this, RingtoneManager.TYPE_ALARM, pickedUri);
}
} catch (Exception e) {
e.printStackTrace();
}
break;
case NotificationButton:
try {
//得到選擇的鈴聲
pickedUri=data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
//將選擇的鈴聲選擇成默認
if(pickedUri!=null){
RingtoneManager.setActualDefaultRingtoneUri(Media_RingTongActivity.this, RingtoneManager.TYPE_NOTIFICATION, pickedUri);
}
} catch (Exception e) {
e.printStackTrace();
}
break;
}
super.onActivityResult(requestCode, resultCode, data);
}
}
代碼說明：
1.布局文件就是三個按鈕。
2.在真機測試了壹下，可以運行，在模擬器測試要註意了，每次把音頻文件push到sdcard中得時候,必須重啟模擬器,模擬器才會應用設置,不然是檢索不到的。
3.系統的原始聲音存放在/system/media/audio/文件中 。
4.最後壹點不要忘記給應用程序加權限了：
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_SETTINGS"/>