前言 欢迎大家我分享和推荐好用的代码段~~ CSDN：
雨季o莫忧离：/luckkof
正文
Step1: AndroidManifest.xmlAdd use permission<uses-permission android:name="android.permission.WRITE_SETTING"/><uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>Step2: resourceres\menu\popup_menu.xml<item android:id="@+id/set_ringtone"android:title="@string/set_ringtone"/>res\values\strings.xml<string name="set_ringtone">Use As Ringtone</string>Use As Ringtone多国语言需要添加在对应的values_xxxx\strings.xml 中Step3:importFileManagerOperationActivity.javaimport android.provider.MediaStore;import android.database.Cursor;import android.content.ContentResolver;import android.content.ContentValues;import android.provider.Settings;import android.widget.Toast;import android.content.ContentUris;import android.media.MediaFile;Step4:显示、隐藏setRingtone菜单 updateEditPopupMenu() 方法改为如下private void updateEditPopupMenu() {final Menu menu = mEditPopupMenu.getMenu();int selectedCount = mAdapter.getCheckedItemsCount();// remove (disable) protection info iconmenu.removeItem(R.id.protection_info);if (selectedCount == 0) {menu.findItem(R.id.rename).setEnabled(false);menu.findItem(R.id.details).setEnabled(false);//addmenu.findItem(R.id.set_ringtone).setEnabled(false);} else if (selectedCount == 1) {// enable details iconmenu.findItem(R.id.details).setEnabled(true);// enable rename iconif (mAdapter.getCheckedFileInfoItemsList().get(0).getFile().canWrite()) {menu.findItem(R.id.rename).setEnabled(true);}//add// only audio file can enable set ringtoneFileInfo fileInfo1 = mAdapter.getCheckedFileInfoItemsList().get(0);if(!fileInfo1.isDrmFile() && !fileInfo1.isDirectory()&& IsMusic(fileInfo1)){LogUtils.d(TAG, "need set ringtone" );menu.findItem(R.id.set_ringtone).setEnabled(true);}else {menu.findItem(R.id.set_ringtone).setEnabled(false);}// enable protection info iconFileInfo fileInfo = mAdapter.getCheckedFileInfoItemsList().get(0);if (fileInfo.isDrmFile()) {String path = fileInfo.getFileAbsolutePath();if (DrmManager.getInstance().checkDrmObjectType(path)) {String mimeType = DrmManager.getInstance().getOriginalMimeType(path);if (mimeType != null && mimeType.trim().length() != 0) {menu.add(0, R.id.protection_info, 0,com.mediatek.internal.R.string.drm_protectioninfo_title);}}}} else {// disable details iconmenu.findItem(R.id.details).setEnabled(false);// disable rename iconmenu.findItem(R.id.rename).setEnabled(false);//addmenu.findItem(R.id.set_ringtone).setEnabled(false);}}Step5: .判断选择文件是否是audio 文件定义IsMusic 方法private boolean IsMusic(FileInfo fileinfo ){String mimeType = fileinfo.getFileMimeType(mService);int fileType = MediaFile.getFileTypeForMimeType(mimeType);if (mimeType.startsWith("audio/") || MediaFile.isAudioFileType(fileType)) {return true;}else {return false;}}Step6: 定义设置ringtone 方法新增方法 setRingtonepublic void setRingtone(MenuItem menuItem){LogUtils.d(TAG, "start setRingtone");FileInfo fileinfo = mAdapter.getCheckedFileInfoItemsList().get(0);ContentResolver resolver = getApplicationContext().getContentResolver();String filepath = fileinfo.getFileAbsolutePath();Long fileid = 0L;//Uri fileuri=Uri fileuri= getUriForPath(filepath);Uri fileuri= MediaStore.Audio.Media.getContentUriForPath(filepath);LogUtils.d(TAG, "setRingtone uri"+fileuri);LogUtils.d(TAG, "setRingtone path"+filepath);Cursor file_cursor = resolver.query(fileuri,null,MediaStore.MediaColumns.DATA+"=?",new String[]{filepath},null);if(file_cursor.moveToFirst() && file_cursor.getCount() >0){String _id = file_cursor.getString(0);fileid = Long.valueOf(_id);}Uri ringUri = ContentUris.withAppendedId(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,fileid);try {ContentValues values = new ContentValues(2);values.put(MediaStore.Audio.Media.IS_RINGTONE, "1");values.put(MediaStore.Audio.Media.IS_ALARM, "1");resolver.update(ringUri, values, null, null);} catch (UnsupportedOperationException ex) {LogUtils.d(TAG, "couldn't set ringtone flag for id " + ringUri);return;}LogUtils.d(TAG, "setRingtone ringUri"+ringUri.toString());String[] cols = new String[] {MediaStore.Audio.Media._ID,MediaStore.Audio.Media.DATA,MediaStore.Audio.Media.TITLE};/// M: use selectionArgs replace set query value in where @{String where = MediaStore.Audio.Media._ID + "=?";String[] whereArgs = new String[]{String.valueOf(fileid)};Cursor cursor = resolver.query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,cols, where ,whereArgs,null);/// @}try {if (cursor != null && cursor.getCount() == 1) {// Set the system setting to make this the current ringtonecursor.moveToFirst();Settings.System.putString(resolver, Settings.System.RINGTONE, ringUri.toString());Toast.makeText(getApplicationContext(), "setRingtone Success", Toast.LENGTH_SHORT).show();}} finally {if (cursor != null) {cursor.close();}}}Step7:重新定义MediaStore.java getContentUriForPath 方法之所以定义getContentUriForPath，是因为当时开发该feature的时候，发现getContentUriForPath这个函数有bug，当路径是/storage/sdcard1/ 时候，无法正确返回uri，返回来的竟然是Internal_content_uri。public static Uri getContentUriForPath(String path) {return((path.startsWith(Environment.getRootDirectory()+"/media"))?INTERNAL_CONTENT_URI :EXTERNAL_CONTENT_URI);}Step8:响应setRingtone 在onMenuItemClick 方法里面增加case R.id.set_ringtone:setRingtone(menuItem);break;最后编译./mk mm ./mediatek/packages/apps/FileManager/
