Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2014 pengjianbo(pengjianbosoft@gmail.com), Inc.
 *
 * 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.
 */

import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;

import android.net.Uri;

import android.os.ParcelFileDescriptor;
import android.provider.MediaStore;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import java.io.Closeable;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class Main {
    private static final String SCHEME_FILE = "file";
    private static final String SCHEME_CONTENT = "content";

    @Nullable
    public static File getFromMediaUri(Context context, ContentResolver resolver, Uri uri) {
        if (uri == null)
            return null;

        if (SCHEME_FILE.equals(uri.getScheme())) {
            return new File(uri.getPath());
        } else if (SCHEME_CONTENT.equals(uri.getScheme())) {
            final String[] filePathColumn = { MediaStore.MediaColumns.DATA, MediaStore.MediaColumns.DISPLAY_NAME };
            Cursor cursor = null;
            try {
                cursor = resolver.query(uri, filePathColumn, null, null, null);
                if (cursor != null && cursor.moveToFirst()) {
                    final int columnIndex = (uri.toString().startsWith("content://com.google.android.gallery3d"))
                            ? cursor.getColumnIndex(MediaStore.MediaColumns.DISPLAY_NAME)
                            : cursor.getColumnIndex(MediaStore.MediaColumns.DATA);
                    // Picasa images on API 13+
                    if (columnIndex != -1) {
                        String filePath = cursor.getString(columnIndex);
                        if (!TextUtils.isEmpty(filePath)) {
                            return new File(filePath);
                        }
                    }
                }
            } catch (IllegalArgumentException e) {
                // Google Drive images
                return getFromMediaUriPfd(context, resolver, uri);
            } catch (SecurityException ignored) {
                // Nothing we can do
            } finally {
                if (cursor != null)
                    cursor.close();
            }
        }
        return null;
    }

    @Nullable
    private static File getFromMediaUriPfd(Context context, ContentResolver resolver, Uri uri) {
        if (uri == null)
            return null;

        FileInputStream input = null;
        FileOutputStream output = null;
        try {
            ParcelFileDescriptor pfd = resolver.openFileDescriptor(uri, "r");
            FileDescriptor fd = pfd.getFileDescriptor();
            input = new FileInputStream(fd);

            String tempFilename = getTempFilename(context);
            output = new FileOutputStream(tempFilename);

            int read;
            byte[] bytes = new byte[4096];
            while ((read = input.read(bytes)) != -1) {
                output.write(bytes, 0, read);
            }
            return new File(tempFilename);
        } catch (IOException ignored) {
            // Nothing we can do
        } finally {
            closeSilently(input);
            closeSilently(output);
        }
        return null;
    }

    private static String getTempFilename(Context context) throws IOException {
        File outputDir = context.getCacheDir();
        File outputFile = File.createTempFile("image", "tmp", outputDir);
        return outputFile.getAbsolutePath();
    }

    public static void closeSilently(@Nullable Closeable c) {
        if (c == null)
            return;
        try {
            c.close();
        } catch (Throwable t) {
            // Do nothing
        }
    }
}