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.opendatakit.survey.android.activities; import java.io.File; import java.io.IOException; import org.apache.commons.io.FileUtils; import org.opendatakit.common.android.utilities.MediaUtils; import org.opendatakit.common.android.utilities.ODKFileUtils; import org.opendatakit.common.android.utilities.WebLogger; import org.opendatakit.survey.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.Images; import android.widget.Toast; /** * Simple shim for media interactions. * * @author mitchellsundt@gmail.com * */ public class MediaChooseImageActivity extends Activity { private static final String t = "MediaChooseImageActivity"; private static final int ACTION_CODE = 1; private static final String MEDIA_CLASS = "image/"; private static final String APP_NAME = "appName"; private static final String URI_FRAGMENT = "uriFragment"; private static final String URI_FRAGMENT_NEW_FILE_BASE = "uriFragmentNewFileBase"; private static final String CONTENT_TYPE = "contentType"; private String appName = null; private String uriFragmentNewFileBase = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle extras = getIntent().getExtras(); if (extras != null) { appName = extras.getString(APP_NAME); uriFragmentNewFileBase = extras.getString(URI_FRAGMENT_NEW_FILE_BASE); } if (savedInstanceState != null) { appName = savedInstanceState.getString(APP_NAME); uriFragmentNewFileBase = savedInstanceState.getString(URI_FRAGMENT_NEW_FILE_BASE); } if (appName == null) { throw new IllegalArgumentException("Expected " + APP_NAME + " key in intent bundle. Not found."); } if (uriFragmentNewFileBase == null) { throw new IllegalArgumentException( "Expected " + URI_FRAGMENT_NEW_FILE_BASE + " key in intent bundle. Not found."); } Intent i = new Intent(Intent.ACTION_GET_CONTENT); i.setType(MEDIA_CLASS + "*"); try { startActivityForResult(i, ACTION_CODE); } catch (ActivityNotFoundException e) { Toast.makeText(this, getString(R.string.activity_not_found, Intent.ACTION_GET_CONTENT + " " + MEDIA_CLASS), 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_NEW_FILE_BASE, uriFragmentNewFileBase); } @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; } /* * We have chosen a saved image from somewhere, but we really want it to be * in: /sdcard/odk/instances/[current instance]/something.jpg so we copy it * there and insert that copy into the content provider. */ // get gp of chosen file Uri selectedMedia = intent.getData(); String sourceMediaPath = MediaUtils.getPathFromUri(this, selectedMedia, Images.Media.DATA); File sourceMedia = new File(sourceMediaPath); String extension = sourceMediaPath.substring(sourceMediaPath.lastIndexOf(".")); File newMedia = ODKFileUtils.getAsFile(appName, uriFragmentNewFileBase + extension); try { FileUtils.copyFile(sourceMedia, newMedia); } catch (IOException e) { WebLogger.getLogger(appName).e(t, "Failed to copy " + sourceMedia.getAbsolutePath()); Toast.makeText(this, R.string.media_save_failed, Toast.LENGTH_SHORT).show(); // keep the image as a captured image so user can choose it. setResult(Activity.RESULT_CANCELED); finish(); return; } WebLogger.getLogger(appName).i(t, "copied " + sourceMedia.getAbsolutePath() + " to " + newMedia.getAbsolutePath()); Uri mediaURI = null; if (newMedia.exists()) { // Add the new image to the Media content provider so that the // viewing is fast in Android 2.0+ ContentValues values = new ContentValues(6); values.put(Images.Media.TITLE, newMedia.getName()); values.put(Images.Media.DISPLAY_NAME, newMedia.getName()); values.put(Images.Media.DATE_TAKEN, System.currentTimeMillis()); values.put(Images.Media.MIME_TYPE, MEDIA_CLASS + extension.substring(1)); values.put(Images.Media.DATA, newMedia.getAbsolutePath()); mediaURI = getContentResolver().insert(Images.Media.EXTERNAL_CONTENT_URI, values); WebLogger.getLogger(appName).i(t, "Insert " + MEDIA_CLASS + " returned uri = " + mediaURI.toString()); // if you are replacing an answer. delete the previous image using // the // content provider. String binarypath = MediaUtils.getPathFromUri(this, mediaURI, Images.Media.DATA); File newMediaFromCP = new File(binarypath); WebLogger.getLogger(appName).i(t, "Return mediaFile: " + newMediaFromCP.getAbsolutePath()); Intent i = new Intent(); i.putExtra(URI_FRAGMENT, ODKFileUtils.asUriFragment(appName, newMediaFromCP)); String name = newMediaFromCP.getName(); i.putExtra(CONTENT_TYPE, MEDIA_CLASS + name.substring(name.lastIndexOf(".") + 1)); setResult(Activity.RESULT_OK, i); finish(); } else { WebLogger.getLogger(appName).e(t, "No " + MEDIA_CLASS + " exists at: " + newMedia.getAbsolutePath()); Toast.makeText(this, R.string.media_save_failed, Toast.LENGTH_SHORT).show(); setResult(Activity.RESULT_CANCELED); finish(); } } }