Java tutorial
/* * Copyright (C) 2012-2013 University of Washington * * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package org.path.episample.android.activities; import java.io.File; import java.io.IOException; import org.apache.commons.io.FileUtils; import org.path.common.android.utilities.MediaUtils; import org.path.common.android.utilities.ODKFileUtils; import org.path.common.android.utilities.WebLogger; import org.path.episample.android.R; import android.app.Activity; import android.content.ActivityNotFoundException; import android.content.ContentValues; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.provider.MediaStore.Audio; import android.widget.Toast; /** * Simple shim for media interactions. * * @author mitchellsundt@gmail.com * */ public class MediaCaptureAudioActivity extends Activity { private static final String t = "MediaCaptureAudioActivity"; private static final int ACTION_CODE = 1; private static final String MEDIA_CLASS = "audio/"; private static final String APP_NAME = "appName"; private static final String URI_FRAGMENT = "uriFragment"; private static final String CONTENT_TYPE = "contentType"; private static final String URI_FRAGMENT_NEW_FILE_BASE = "uriFragmentNewFileBase"; private static final String HAS_LAUNCHED = "hasLaunched"; private static final String AFTER_RESULT = "afterResult"; private static final String ERROR_NO_FILE = "Media file does not exist! "; private static final String ERROR_COPY_FILE = "Media file copy failed! "; private String appName = null; private String uriFragmentNewFileBase = null; private String uriFragmentToMedia = null; private boolean afterResult = false; private boolean hasLaunched = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle extras = getIntent().getExtras(); if (extras != null) { appName = extras.getString(APP_NAME); uriFragmentToMedia = extras.getString(URI_FRAGMENT); hasLaunched = extras.getBoolean(HAS_LAUNCHED); afterResult = extras.getBoolean(AFTER_RESULT); uriFragmentNewFileBase = extras.getString(URI_FRAGMENT_NEW_FILE_BASE); } if (savedInstanceState != null) { appName = savedInstanceState.getString(APP_NAME); uriFragmentToMedia = savedInstanceState.getString(URI_FRAGMENT); hasLaunched = savedInstanceState.getBoolean(HAS_LAUNCHED); afterResult = savedInstanceState.getBoolean(AFTER_RESULT); uriFragmentNewFileBase = savedInstanceState.getString(URI_FRAGMENT_NEW_FILE_BASE); } if (appName == null) { throw new IllegalArgumentException("Expected " + APP_NAME + " key in intent bundle. Not found."); } if (uriFragmentToMedia == null) { if (uriFragmentNewFileBase == null) { throw new IllegalArgumentException( "Expected " + URI_FRAGMENT_NEW_FILE_BASE + " key in intent bundle. Not found."); } afterResult = false; hasLaunched = false; } } @Override protected void onResume() { super.onResume(); if (afterResult) { // this occurs if we re-orient the phone during the save-recording // action returnResult(); } else if (!hasLaunched && !afterResult) { Intent i = new Intent(Audio.Media.RECORD_SOUND_ACTION); // to make the name unique... File f = ODKFileUtils.getAsFile(appName, (uriFragmentToMedia == null ? uriFragmentNewFileBase : uriFragmentToMedia)); int idx = f.getName().lastIndexOf('.'); if (idx == -1) { i.putExtra(Audio.Media.DISPLAY_NAME, f.getName()); } else { i.putExtra(Audio.Media.DISPLAY_NAME, f.getName().substring(0, idx)); } try { hasLaunched = true; startActivityForResult(i, ACTION_CODE); } catch (ActivityNotFoundException e) { String err = getString(R.string.activity_not_found, Audio.Media.RECORD_SOUND_ACTION); WebLogger.getLogger(appName).e(t, err); Toast.makeText(this, err, Toast.LENGTH_SHORT).show(); setResult(Activity.RESULT_CANCELED); finish(); } } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putString(APP_NAME, appName); outState.putString(URI_FRAGMENT, uriFragmentToMedia); outState.putString(URI_FRAGMENT_NEW_FILE_BASE, uriFragmentNewFileBase); outState.putBoolean(HAS_LAUNCHED, hasLaunched); outState.putBoolean(AFTER_RESULT, afterResult); } private void deleteMedia() { if (uriFragmentToMedia == null) { return; } // get the file path and delete the file File f = ODKFileUtils.getAsFile(appName, uriFragmentToMedia); String path = f.getAbsolutePath(); // delete from media provider int del = MediaUtils.deleteAudioFileFromMediaProvider(this, appName, path); WebLogger.getLogger(appName).i(t, "Deleted " + del + " rows from audio media content provider"); } @Override public void onActivityResult(int requestCode, int resultCode, Intent intent) { if (resultCode == Activity.RESULT_CANCELED) { // request was canceled -- propagate setResult(Activity.RESULT_CANCELED); finish(); return; } Uri mediaUri = intent.getData(); // it is unclear whether getData() always returns a value or if // getDataString() does... String str = intent.getDataString(); if (mediaUri == null && str != null) { WebLogger.getLogger(appName).w(t, "Attempting to work around null mediaUri"); mediaUri = Uri.parse(str); } if (mediaUri == null) { // we are in trouble WebLogger.getLogger(appName).e(t, "No uri returned from RECORD_SOUND_ACTION!"); setResult(Activity.RESULT_CANCELED); finish(); return; } // Remove the current media. deleteMedia(); // get the file path and create a copy in the instance folder String binaryPath = MediaUtils.getPathFromUri(this, (Uri) mediaUri, Audio.Media.DATA); File source = new File(binaryPath); String extension = binaryPath.substring(binaryPath.lastIndexOf(".")); if (uriFragmentToMedia == null) { // use the newFileBase as a starting point... uriFragmentToMedia = uriFragmentNewFileBase + extension; } // adjust the mediaPath (destination) to have the same extension // and delete any existing file. File f = ODKFileUtils.getAsFile(appName, uriFragmentToMedia); File sourceMedia = new File(f.getParentFile(), f.getName().substring(0, f.getName().lastIndexOf('.')) + extension); uriFragmentToMedia = ODKFileUtils.asUriFragment(appName, sourceMedia); deleteMedia(); try { FileUtils.copyFile(source, sourceMedia); } catch (IOException e) { WebLogger.getLogger(appName).e(t, ERROR_COPY_FILE + sourceMedia.getAbsolutePath()); Toast.makeText(this, R.string.media_save_failed, Toast.LENGTH_SHORT).show(); deleteMedia(); setResult(Activity.RESULT_CANCELED); finish(); return; } if (sourceMedia.exists()) { // Add the copy to the content provier ContentValues values = new ContentValues(6); values.put(Audio.Media.TITLE, sourceMedia.getName()); values.put(Audio.Media.DISPLAY_NAME, sourceMedia.getName()); values.put(Audio.Media.DATE_ADDED, System.currentTimeMillis()); values.put(Audio.Media.DATA, sourceMedia.getAbsolutePath()); Uri MediaURI = getApplicationContext().getContentResolver().insert(Audio.Media.EXTERNAL_CONTENT_URI, values); WebLogger.getLogger(appName).i(t, "Inserting AUDIO returned uri = " + MediaURI.toString()); uriFragmentToMedia = ODKFileUtils.asUriFragment(appName, sourceMedia); WebLogger.getLogger(appName).i(t, "Setting current answer to " + sourceMedia.getAbsolutePath()); int delCount = getApplicationContext().getContentResolver().delete(mediaUri, null, null); WebLogger.getLogger(appName).i(t, "Deleting original capture of file: " + mediaUri.toString() + " count: " + delCount); } else { WebLogger.getLogger(appName).e(t, "Inserting Audio file FAILED"); } /* * We saved the audio to the instance directory. Verify that it is there... */ returnResult(); return; } private void returnResult() { File sourceMedia = (uriFragmentToMedia != null) ? ODKFileUtils.getAsFile(appName, uriFragmentToMedia) : null; if (sourceMedia != null && sourceMedia.exists()) { Intent i = new Intent(); i.putExtra(URI_FRAGMENT, ODKFileUtils.asUriFragment(appName, sourceMedia)); String name = sourceMedia.getName(); i.putExtra(CONTENT_TYPE, MEDIA_CLASS + name.substring(name.lastIndexOf(".") + 1)); setResult(Activity.RESULT_OK, i); finish(); } else { WebLogger.getLogger(appName).e(t, ERROR_NO_FILE + ((uriFragmentToMedia != null) ? sourceMedia.getAbsolutePath() : "null mediaPath")); Toast.makeText(this, R.string.media_save_failed, Toast.LENGTH_SHORT).show(); setResult(Activity.RESULT_CANCELED); finish(); } } @Override public void finish() { hasLaunched = false; afterResult = true; super.finish(); } }