Android 多圖選擇器PictureSelector 使用

權限android

<uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

依賴git

maven {  url 'https://jitpack.io' }

implementation 'com.github.LuckSiege.PictureSelector:picture_library:v2.6.0'

避免報錯github

而後由於PictureSelector須要項目minSdkVersion要大於或者等於19
而後最好添加
canvas

compileOptions { 
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

若是出現限制dex大小添加緩存

multiDexEnabled true

apply plugin: 'com.android.application'

android { 
    compileSdkVersion 30
    buildToolsVersion "30.0.1"

    defaultConfig { 
        applicationId "com.wd.circlesharingdemo"
        minSdkVersion 19
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"
        multiDexEnabled true

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes { 
        release { 
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions { 
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

}

使用bash

PictureSelector.create(activity)
                .openGallery(PictureMimeType.ofImage())//所有.PictureMimeType.ofAll()、圖片.ofImage()、視頻.ofVideo()、音頻.ofAudio()
                //.theme()//主題樣式(不設置爲默認樣式) 也可參考demo values/styles下 例如：R.style.picture.white.style
                .maxSelectNum(maxSize)// 最大圖片選擇數量 int
                .minSelectNum(1)// 最小選擇數量 int
                .imageEngine(GlideEngine.createGlideEngine())
                .imageSpanCount(3)// 每行顯示個數 int
                .isCamera(true)// 是否顯示拍照按鈕 true or false
                .isZoomAnim(true)// 圖片列表點擊 縮放效果 默認true
                .isEnableCrop(true)// 是否裁剪 true or false
                .isCompress(true)// 是否壓縮 true or false
                .minimumCompressSize(100)// 小於100kb的圖片不壓縮
                .forResult(PictureConfig.CHOOSE_REQUEST);//結果回調onActivityResult code

而後在onActivityResult裏面獲取圖片集合服務器

@Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { 
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) { 
            // 結果回調
            List<LocalMedia> selectList = PictureSelector.obtainMultipleResult(data);
         //在這裏補充一下由於如今的數據格式是LocalMedia須要進行轉化不能強轉這樣會找不到路徑的
       showSelectPic(selectList);
        }
    }

通過測試拍照上傳時會出現上傳不上去的狀況我還進行一次壓縮,拍照成功上傳網絡

/**
 * 關於圖片的工具類壓縮等
 */

public class BitmapUtil { 

    private static String PHOTO_FILE_NAME = "PMSManagerPhoto";

    /**
     * 獲取圖片的旋轉角度
     *
     * @param filePath
     * @return
     */
    public static int getRotateAngle(String filePath) { 
        int rotate_angle = 0;
        try { 
            ExifInterface exifInterface = new ExifInterface(filePath);
            int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
            switch (orientation) { 
                case ExifInterface.ORIENTATION_ROTATE_90:
                    rotate_angle = 90;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_180:
                    rotate_angle = 180;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_270:
                    rotate_angle = 270;
                    break;
            }
        } catch (IOException e) { 
            e.printStackTrace();
        }
        return rotate_angle;
    }

    /**
     * 旋轉圖片角度
     *
     * @param angle
     * @param bitmap
     * @return
     */
    public static Bitmap setRotateAngle(int angle, Bitmap bitmap) { 

        if (bitmap != null) { 
            Matrix m = new Matrix();
            m.postRotate(angle);
            bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(),
                    bitmap.getHeight(), m, true);
            return bitmap;
        }
        return bitmap;

    }

    //轉換爲圓形狀的bitmap
    public static Bitmap createCircleImage(Bitmap source) { 
        int length = source.getWidth() < source.getHeight() ? source.getWidth() : source.getHeight();
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        Bitmap target = Bitmap.createBitmap(length, length, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(target);
        canvas.drawCircle(length / 2, length / 2, length / 2, paint);
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(source, 0, 0, paint);
        return target;
    }



    /**
     * 圖片壓縮-質量壓縮
     *
     * @param filePath 源圖片路徑
     * @return 壓縮後的路徑
     */

    public static String compressImage(String filePath) { 

        //原文件
        File oldFile = new File(filePath);


        //壓縮文件路徑 照片路徑/
        String targetPath = oldFile.getPath();
        int quality = 50;//壓縮比例0-100
        Bitmap bm = getSmallBitmap(filePath);//獲取必定尺寸的圖片
        int degree = getRotateAngle(filePath);//獲取相片拍攝角度

        if (degree != 0) { //旋轉照片角度，防止頭像橫着顯示
            bm = setRotateAngle(degree,bm);
        }
        File outputFile = new File(targetPath);
        try { 
            if (!outputFile.exists()) { 
                outputFile.getParentFile().mkdirs();
                //outputFile.createNewFile();
            } else { 
                outputFile.delete();
            }
            FileOutputStream out = new FileOutputStream(outputFile);
            bm.compress(Bitmap.CompressFormat.JPEG, quality, out);
            out.close();
        } catch (Exception e) { 
            e.printStackTrace();
            return filePath;
        }
        return outputFile.getPath();
    }

    /**
     * 根據路徑得到圖片信息並按比例壓縮，返回bitmap
     */
    public static Bitmap getSmallBitmap(String filePath) { 
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;//只解析圖片邊沿，獲取寬高
        BitmapFactory.decodeFile(filePath, options);
        // 計算縮放比
        options.inSampleSize = calculateInSampleSize(options, 480, 800);
        // 完整解析圖片返回bitmap
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFile(filePath, options);
    }


    public static int calculateInSampleSize(BitmapFactory.Options options,
                                            int reqWidth, int reqHeight) { 
        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;
        if (height > reqHeight || width > reqWidth) { 
            final int heightRatio = Math.round((float) height / (float) reqHeight); final int widthRatio = Math.round((float) width / (float) reqWidth); inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio; } return inSampleSize; } /** * 質量壓縮Bitmap方法 * @param image * @return */ public static Bitmap compressImage1(Bitmap image) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); image.compress(Bitmap.CompressFormat.JPEG, 100, baos);// 質量壓縮方法，這裏100表示不壓縮，把壓縮後的數據存放到baos中 int options = 90; while (baos.toByteArray().length / 1024 > 100) { // 循環判斷若是壓縮後圖片是否大於100kb,大於繼續壓縮 baos.reset(); // 重置baos即清空baos image.compress(Bitmap.CompressFormat.JPEG, options, baos);// 這裏壓縮options%，把壓縮後的數據存放到baos中 options -= 10;// 每次都減小10 } ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());// 把壓縮後的數據baos存放到ByteArrayInputStream中
        Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);// 把ByteArrayInputStream數據生成圖片
        return bitmap;
    }

    /**
     * 如下是bitmap轉file(帶壓縮轉換
     * @param context
     * @param bitmap
     * @param kb
     * @return
     */

    /*
     * bitmap轉file(帶壓縮轉換 能夠本身設定 默認100kb) 上傳服務器的時候使用
     */
    public static String bitmapToFileWhithCompress(Context context , Bitmap bitmap , int kb) { 
        String sdPath = getDiskCacheDir(context);
        String name = new DateFormat().format("yyyyMMddhhmmss",
                Calendar.getInstance(Locale.CHINA)) + ".jpg";
        String picPath = sdPath + "/" + name;
        File outImage = new File(picPath);
        OutputStream outputStream = null;
        try { 
            outputStream = new FileOutputStream(outImage);
        } catch (FileNotFoundException e) { 
            e.printStackTrace();
        }
        //調用了下面封裝好的壓縮方法返回已經壓縮的bitmap 而後再調用cmpress 輸出流把bitmap轉走 100再也不壓縮 由於已經壓縮好了
        compressImage(bitmap,kb).compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
        //返回一個壓縮圖片絕對路徑
        return picPath;
    }

    /**
     * 獲取緩存文件夾的相對路徑
     */
    public static String getDiskCacheDir(Context ctx) { 
        String cachePath;
        if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())
                || !Environment.isExternalStorageRemovable()) { 
            cachePath = ctx.getExternalCacheDir().getPath();
        } else { 
            cachePath = ctx.getCacheDir().getPath();
        }
        return cachePath;
    }
    //無回調有返回值的壓縮方法
    public static Bitmap compressImage(Bitmap image , int kb) { 
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        image.compress(Bitmap.CompressFormat.JPEG, 100, baos);//質量壓縮方法，這裏100表示不壓縮，把壓縮後的數據存放到baos中
        int options = 100;
        while (baos.toByteArray().length / 1024 > kb) {  //循環判斷若是壓縮後圖片是否大於設定的kb,大於繼續壓縮
            baos.reset();//重置baos即清空baos
            image.compress(Bitmap.CompressFormat.JPEG, options, baos);//這裏壓縮options%，把壓縮後的數據存放到baos中
            options -= 10;//每次都減小10
        }
        ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());//把壓縮後的數據baos存放到ByteArrayInputStream中
        Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);//把ByteArrayInputStream數據生成圖片
        return bitmap;
    }
    /**
     * file轉bitmap(進行壓縮,防止內存泄漏)
     */
    public static Bitmap fileToBitmap(String imagePath,int kb) { 
        Bitmap bitmap = null;
        try { 
            File file = new File(imagePath);
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inJustDecodeBounds = false;
            FileInputStream fis = new FileInputStream(file);
            bitmap = BitmapFactory.decodeStream(fis, null, options);
            //將bitmap進行壓縮防止內存泄漏
            bitmap = compressImage(bitmap,kb);
            fis.close();
        } catch (IOException e) { 
            e.printStackTrace();
        }
        return bitmap;
    }

    /*
     * bitmap轉file(原圖轉換)
     */
    public static String bitmapToFile(Context context,Bitmap bitmap) { 
        String sdPath = getDiskCacheDir(context);
        String name = new DateFormat().format("yyyyMMddhhmmss",
                Calendar.getInstance(Locale.CHINA)) + ".jpg";
        String picPath = sdPath + "/" + name;
        File outImage = new File(picPath);
        OutputStream outputStream = null;
        try { 
            outputStream = new FileOutputStream(outImage);
        } catch (FileNotFoundException e) { 
            e.printStackTrace();
        }
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
        //返回一個圖片路徑
        return picPath;
    }
}

private void showSelectPic(List<LocalMedia> result) { 
        fileList = new ArrayList<>();
        for (int i = 0; i < result.size(); i++) { 
            String path;
            //判斷是否10.0以上
            if (Build.VERSION.SDK_INT >= 29) { 
                path = result.get(i).getAndroidQToPath();
            } else { 
                path = result.get(i).getPath();
            }
            newPath = BitmapUtil.compressImage(path);//壓縮
            fileList.add(new File(newPath));//將路徑放到File集合裏面去傳到接口
            Log.e(TAG, "圖片連接: " + path);
            //請求網絡上傳圖片
            okRE.getInstance().postMoreImage(urls,headmap,map,fileList, new okRE.NetCallBack() { 
                @Override
                public void onSuccess(String string) { 
                    Toast.makeText(MainActivity.this, string+"", Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onFail(String string) { 
                    Toast.makeText(MainActivity.this, string+"", Toast.LENGTH_SHORT).show();

                }
            });
        }

圖片預覽app

//圖片選擇器自帶預覽
                PictureSelector.create(MainActivity.this)
                        .themeStyle(R.style.picture_default_style)
                        .isNotPreviewDownload(true)//是否顯示保存彈框
                        .imageEngine(GlideEngine.createGlideEngine()) // 選擇器展現不出圖片則添加
                        .openExternalPreview(position, 「選擇的圖片集合」);

使用方法maven

private List<LocalMedia> selectList = new ArrayList<>();
 private List<String> Listss = new ArrayList<>();//好比這個是網絡請求圖片集合
 private List<String> List = new ArrayList<>();//後臺返回多圖數據切割後集合

 //注意若是多圖切割
 String[] split = picture.split(",");
 List.add(split[i]) //看後臺返回數據狀況也可不進行切割
 for (int i = 0; i < List.size(); i++) { 
                    LocalMedia localMedia = new LocalMedia();
                    localMedia.setPath(list.get(i));
                    selectList.add(localMedia);
                }
PictureSelector.create(MainActivity.this)
             .themeStyle(R.style.picture_default_style)
             .isNotPreviewDownload(true)//是否顯示保存彈框
             .imageEngine(GlideEngine.createGlideEngine()) 
             .openExternalPreview(position, selectList);

以上就是PictureSelector的簡單使用若是須要項目demo

PictureSelector的使用demo

感謝觀看