package com.snyj.wsd.kangaibang.utils;

import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.net.Uri;
import android.provider.MediaStore.Images;

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

/**
 * Created by ruin on 2016/11/15.
 */
public class ImageUtils {
    //小米手機從相簿調圖空指標問題
    public static Uri getPictureUri(android.content.Intent intent, Context context) {
        Uri uri = intent.getData();
        String type = intent.getType();
        if
 
 (uri.getScheme().equals("file") && (type.contains("image/"))) {
            String path = uri.getEncodedPath();
            if (path != null) {
                path = Uri.decode(path);
                ContentResolver cr = context.getContentResolver();
                StringBuffer buff = new StringBuffer();
                buff.append("("
 
).append(Images.ImageColumns.DATA).append("=")
                        .append("'" + path + "'").append(")");
                Cursor cur = cr.query(Images.Media.EXTERNAL_CONTENT_URI,
                        new String[]{Images.ImageColumns._ID},
                        buff.toString(), null, null);
                int index = 0;
                for (cur.moveToFirst(); !cur.isAfterLast(); cur.moveToNext()) {
                    index = cur.getColumnIndex(Images.ImageColumns._ID);
                    // set _id value
                    index = cur.getInt(index);
                }
                if (index == 0) {
                    // do nothing
                } else {
                    Uri uri_temp = Uri
                            .parse("content://media/external/images/media/"
                                    + index);
                    if (uri_temp != null) {
                        uri = uri_temp;
                    }
                }
            }
        }
        return uri;
    }

    /**
     * 旋轉照片
     *
     * @param img
     * @param degree
     * @return
     */
    public static Bitmap toturn(Bitmap img, int degree) {
        Matrix matrix = new Matrix();
        matrix.postRotate(degree); /*翻轉90度*/
        int width = img.getWidth();
        int height = img.getHeight();
        img = Bitmap.createBitmap(img, 0, 0, width, height, matrix, true);
        return img;
    }

    /**
     * 讀取照片exif資訊中的旋轉角度
     *
     * @param path 照片路徑
     * @return角度
     */
    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;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return degree;
    }

    //縮小圖片
    public static Bitmap smallImage(Bitmap bitmapOrg) {
        //獲取這個圖片的寬和高
        int width = bitmapOrg.getWidth();
        int height = bitmapOrg.getHeight();

        //定義預轉換成的圖片的寬度和高度
        int newWidth = 1200;
//        int newHeight = 960;

        //計算縮放率，新尺寸除原始尺寸
        float scaleWidth = ((float) newWidth) / width;
//        float scaleHeight = ((float) newHeight) / height;

        // 建立操作圖片用的matrix物件
        Matrix matrix = new Matrix();

        // 縮放圖片動作
        matrix.postScale(scaleWidth, scaleWidth);

        // 建立新的圖片
        Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,
                width, height, matrix, true);

        //將上面建立的Bitmap轉換成Drawable物件，使得其可以使用在ImageView, ImageButton中

        return resizedBitmap;
    }

    //儲存Bitmap到本地
    public static void saveBitmap(Bitmap bm, String path) {
        File f = new File(path);
        if (f.exists()) {
            f.delete();
        }
        try {
            FileOutputStream out = new FileOutputStream(f);
            bm.compress(Bitmap.CompressFormat.PNG, 90, out);
            out.flush();
            out.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

加點東西，選擇本地視訊的時候，獲取視訊的縮圖方法~

//獲取視訊縮圖
public static Bitmap getVideoThumbnail(String filePath) {
        Bitmap bitmap = null;
        MediaMetadataRetriever retriever = new MediaMetadataRetriever();
        try {
            retriever.setDataSource(filePath);
            bitmap = retriever.getFrameAtTime();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (RuntimeException e) {
            e.printStackTrace();
        } finally {
            try {
                retriever.release();
            } catch (RuntimeException e) {
                e.printStackTrace();
            }
        }
        return bitmap;
}
   /**
     * 毛化玻璃效果
     *
     * @param context
     * @param radius     毛化程度（取值0-24）
     * @param sentBitmap 原圖片
     */
    public static Bitmap blur(Context context, float radius, Bitmap sentBitmap) {
        Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);

        final RenderScript rs = RenderScript.create(context);
        final Allocation input = Allocation.createFromBitmap(rs, sentBitmap, Allocation.MipmapControl.MIPMAP_NONE,
                Allocation.USAGE_SCRIPT);
        final Allocation output = Allocation.createTyped(rs, input.getType());
        final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
        script.setRadius(radius);
        script.setInput(input);
        script.forEach(output);
        output.copyTo(bitmap);
        return bitmap;
    }