CNLive Android Team / CNIMDemo · Files

package com.cnlive.im.util;

import android.annotation.TargetApi;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.text.TextUtils;
import android.widget.Toast;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * Created by gujun on 2015/5/19.
 */
public class UploadImageUtils {
    private static final String IMAGE_PATH = "/com.cnlive.shockwave/image/";

    private static ByteArrayOutputStream getImageStream(String srcPath) {
//        BitmapFactory.Options newOpts = new BitmapFactory.Options();
//        //开始读入图片，此时把options.inJustDecodeBounds 设回true了
//        newOpts.inJustDecodeBounds = true;
//        Bitmap bitmap ;
//        BitmapFactory.decodeFile(srcPath,newOpts);//此时返回bm为空
//        newOpts.inJustDecodeBounds = false;
//        int scale = 0;
//        if(newOpts.outHeight <= newOpts.outWidth){//竖图
//            scale = (int) (newOpts.outHeight / (float) 600);
//        }else{//横图
//            scale = (int) (newOpts.outWidth / (float) 600);
//        }
//        if (scale <= 0)
//            scale = 1;
//        newOpts.inSampleSize = scale;//设置缩放比例
//        //重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
//        bitmap = BitmapFactory.decodeFile(srcPath, newOpts);
        Bitmap bitmap = BitmapFactory.decodeFile(srcPath);
        int oldWidth = bitmap.getWidth();
        int oldHeight = bitmap.getHeight();
        float scale;
        if(oldHeight <= oldWidth){
            scale = (float)600 / oldHeight;
        }else{
            scale = (float)600 / oldWidth;
        }
        if(scale > 1){
            scale = 1 ;
        }
        Matrix matrix = new Matrix();
        matrix.postScale(scale,scale);
        bitmap = Bitmap.createBitmap(bitmap,0,0,oldWidth,oldHeight,matrix,true);
        //解决部分手机相机返回照片自动旋转问题
        bitmap = rotate(bitmap,readPictureDegree(srcPath));
        return compressImage(bitmap);//压缩好比例大小后再进行质量压缩
    }

    private static ByteArrayOutputStream compressImage(Bitmap image) {
        ByteArrayOutputStream bitmapStream = new ByteArrayOutputStream();
        image.compress(Bitmap.CompressFormat.PNG, 100, bitmapStream);//质量压缩方法，这里100表示不压缩，把压缩后的数据存放到bitmapStream中
        return bitmapStream;
    }

    public static String writeStringToSDcard(Context context,String path) throws IOException {
        ByteArrayOutputStream bitmapStream = getImageStream(path);
        return writeToSDcard(context,bitmapStream);
    }

    private static String writeToSDcard(Context context,ByteArrayOutputStream bitmapStream)throws IOException {
        String filePath = getImagePath(context);
        if(!TextUtils.isEmpty(filePath)){
            FileOutputStream out=new FileOutputStream(new File(filePath));
            out.write(bitmapStream.toByteArray());
            bitmapStream.close();
            out.flush();
            out.close();
        }
        return filePath;
    }

    public static String getImagePath(Context context){
        String status = Environment.getExternalStorageState();
        String path = "";
        if (status.equals(Environment.MEDIA_MOUNTED)) {
            String rootPath =  Environment.getExternalStorageDirectory().getAbsolutePath() + IMAGE_PATH;
            File file = new File(rootPath);
            if(!file.exists()){
                file.mkdirs();
            }
            path = rootPath + System.currentTimeMillis() + ".png";
        }else {
            Toast.makeText(context, "未插入SD卡", Toast.LENGTH_SHORT).show();
        }
        return path;

    }

    @TargetApi(Build.VERSION_CODES.KITKAT)
    public static String getPath(final Context context, final Uri uri) {

        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

        // DocumentProvider
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }

                // TODO handle non-primary volumes
            }
            // DownloadsProvider
            else if (isDownloadsDocument(uri)) {

                final String id = DocumentsContract.getDocumentId(uri);
                final Uri contentUri = ContentUris.withAppendedId(
                        Uri.parse("content://downloads/public_downloads"), Long.parseLong(id));

                return getDataColumn(context, contentUri, null, null);
            }
            // MediaProvider
            else if (isMediaDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }

                final String selection = "_id=?";
                final String[] selectionArgs = new String[]{
                        split[1]
                };

                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (and general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {

            // Return the remote address
            if (isGooglePhotosUri(uri))
                return uri.getLastPathSegment();

            return getDataColumn(context, uri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }

        return null;
    }

    /**
     * Get the value of the data column for this Uri. This is useful for
     * MediaStore Uris, and other file-based ContentProviders.
     *
     * @param context       The context.
     * @param uri           The Uri to query.
     * @param selection     (Optional) Filter used in the query.
     * @param selectionArgs (Optional) Selection arguments used in the query.
     * @return The value of the _data column, which is typically a file path.
     */
    public static String getDataColumn(Context context, Uri uri, String selection,
                                       String[] selectionArgs) {

        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {
                column
        };

        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
                    null);
            if (cursor != null && cursor.moveToFirst()) {
                final int index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is ExternalStorageProvider.
     */
    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     */
    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     */
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is Google Photos.
     */
    public static boolean isGooglePhotosUri(Uri uri) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }


    public static int readPictureDegree(String path) {
        int degree = 0;
        try {
            ExifInterface exifInterface = new ExifInterface(path);
            int orientation = exifInterface.getAttributeInt(
                    ExifInterface.TAG_ORIENTATION,
                    ExifInterface.ORIENTATION_NORMAL);
            switch (orientation) {
                case ExifInterface.ORIENTATION_ROTATE_90:
                    degree = 90;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_180:
                    degree = 180;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_270:
                    degree = 270;
                    break;
                default:
                    break;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return degree;
    }

    public static Bitmap rotate(Bitmap b, int degrees) {
        if (degrees == 0) {
            return b;
        }
        if (degrees != 0 && b != null) {
            Matrix m = new Matrix();
            m.setRotate(degrees, (float) b.getWidth(), (float) b.getHeight());
            try {
                Bitmap b2 = Bitmap.createBitmap(b, 0, 0, b.getWidth(),
                        b.getHeight(), m, true);
                if (b != b2) {
                    b.recycle(); // Android开发网再次提示Bitmap操作完应该显示的释放
                    b = b2;
                }
            } catch (OutOfMemoryError ex) {
                // Android123建议大家如何出现了内存不足异常，最好return 原始的bitmap对象。.
            }
        }
        return b;
    }

    public interface SubmitImageListener{
        void writeComplete(File file);
        void writeError(String msg);
    }
}