選擇圖片(拍照，相冊)及剪裁

寫一個選擇圖片的utils

 //選擇是否剪切圖片構造函數
    public CropPhotoUtils(ResultPhoto rp, Context context, boolean crop) {
        mRp = rp;
        mContext = context;
        isCrop = crop;
        takeFile();
    }

    public CropPhotoUtils(ResultPhoto rp, Context context) {
        this(rp, context, true);
    }

圖片存儲

 public void takeFile() {
        String path = getSDCardPath();
        File file = new File(path + "/temp.jpg");
        mImageUri = Uri.fromFile(file);
        File cropFile = new File(getSDCardPath() + "/temp_crop.jpg");
        mImageCropUri = Uri.fromFile(cropFile);
    }

相機方法

 public void takeCamera() {
        Intent intent = null;
        intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//action is capture
        intent.putExtra("return-data", false);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, mImageUri);
        intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
        intent.putExtra("noFaceDetection", true);
        ((Activity) mContext).startActivityForResult(intent, RESULT_CAMERA_PATH);
    }

相冊方法

    public void takeAlbum() {
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
        intent.setType("image/*");
        ((Activity) mContext).startActivityForResult(intent, RESULT_ALBUM_CROP_PATH);
    }

裁剪方法

public void cropImg(Uri uri, int width, final int tag) {
        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri, "image/*");
        intent.putExtra("crop", "true");
        intent.putExtra("aspectX", 9998);
        intent.putExtra("aspectY", 9999);
        intent.putExtra("outputX", width);
        intent.putExtra("outputY", width);
        intent.putExtra("return-data", false);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, mImageCropUri);
        intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
        intent.putExtra("noFaceDetection", true);
        ((Activity) mContext).startActivityForResult(intent, tag);
    }

取SD卡Path

  public static String getSDCardPath() {
        String cmd = "cat /proc/mounts";
        Runtime run = Runtime.getRuntime();
        try {
            Process p = run.exec(cmd);
            BufferedInputStream in = new BufferedInputStream(p.getInputStream());
            BufferedReader inBr = new BufferedReader(new InputStreamReader(in));

            String lineStr;
            while ((lineStr = inBr.readLine()) != null) {
                if (lineStr.contains("sdcard")
                        && lineStr.contains(".android_secure")) {
                    String[] strArray = lineStr.split(" ");
                    if (strArray != null && strArray.length >= 5) {
                        String result = strArray[1].replace("/.android_secure",
                                "");
                        return result;
                    }
                }
                if (p.waitFor() != 0 && p.exitValue() == 1) {
                }
            }
            inBr.close();
            in.close();
        } catch (Exception e) {
            return Environment.getExternalStorageDirectory().getPath();
        }
        return Environment.getExternalStorageDirectory().getPath();
    }

設置裁剪是選擇框默認大小

  private Bitmap setScaleBitmap(Bitmap photo, int SCALE) {
        if (photo != null) {
            Bitmap smallBitmap = zoomBitmap(photo, photo.getWidth() / SCALE, photo.getHeight() / SCALE);
            photo.recycle();
            return smallBitmap;
        }
        return null;
    }

圖片file

 private File getTempFile() {
        try {
            return new File(getSDCardPath() + "/temp_crop.jpg");
        } catch (Exception e) {
            Log.d("harvic", e.getMessage());
        }
        return null;
    }

計算圖片寬高設置壓縮比例

public Bitmap zoomBitmap(Bitmap bitmap, int width, int height) {
        int w = bitmap.getWidth();
        int h = bitmap.getHeight();
        Matrix matrix = new Matrix();
        float scaleWidth = ((float) width / w);
        float scaleHeight = ((float) height / h);
        matrix.postScale(scaleWidth, scaleHeight);
        Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true);
        return newbmp;
    }

圖片路徑

@SuppressLint("NewApi")
    public static String parsePicturePath(Context context, Uri uri) {

        if (null == context || uri == null)
            return null;

        boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
        // DocumentUri
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageDocumentsUri
            if (isExternalStorageDocumentsUri(uri)) {
                String docId = DocumentsContract.getDocumentId(uri);
                String[] splits = docId.split(":");
                String type = splits[0];
                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + File.separator + splits[1];
                }
            }
            // DownloadsDocumentsUri
            else if (isDownloadsDocumentsUri(uri)) {
                String docId = DocumentsContract.getDocumentId(uri);
                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(docId));
                return getDataColumn(context, contentUri, null, null);
            }
            // MediaDocumentsUri
            else if (isMediaDocumentsUri(uri)) {
                String docId = DocumentsContract.getDocumentId(uri);
                String[] split = docId.split(":");
                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;
                }
                String selection = "_id=?";
                String[] selectionArgs = new String[]{split[1]};
                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {
            if (isGooglePhotosContentUri(uri))
                return uri.getLastPathSegment();
            return getDataColumn(context, uri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }
        return null;
    }

private static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {

        Cursor cursor = null;
        String column = "_data";
        String[] projection = {column};
        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
            if (cursor != null && cursor.moveToFirst()) {
                int index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(index);
            }
        } finally {
            try {
                if (cursor != null)
                    cursor.close();
            } catch (Exception e) {
                Log.e("harvic", e.getMessage());
            }
        }
        return null;

    }

private static boolean isExternalStorageDocumentsUri(Uri uri) {
    return "com.android.externalstorage.documents".equals(uri.getAuthority());
}

private static boolean isDownloadsDocumentsUri(Uri uri) {
    return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}

private static boolean isMediaDocumentsUri(Uri uri) {
    return "com.android.providers.media.documents".equals(uri.getAuthority());
}

private static boolean isGooglePhotosContentUri(Uri uri) {
    return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}

保存圖片

public void saveBitmap(Bitmap bm) {
        FileOutputStream out = null;
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) // 判斷是否能夠對SDcard進行操做  
        {    // 獲取SDCard指定目錄下  
            String sdCardDir = Environment.getExternalStorageDirectory() + "/CoolImage/";
            File dirFile = new File(sdCardDir);  //目錄轉化成文件夾  
            if (!dirFile.exists()) {              //若是不存在，那就創建這個文件夾  
                dirFile.mkdirs();
            }                          //文件夾有啦，就能夠保存圖片啦              
            File file = new File(sdCardDir, System.currentTimeMillis() + ".jpg");// 在SDcard的目錄下建立圖片文,以當前時間爲其命名  

            try {
                out = new FileOutputStream(file);
                bm.compress(Bitmap.CompressFormat.JPEG, 90, out);
                // Toast.makeText(mContext, "保存已經至" + Environment.getExternalStorageDirectory() + "/CoolImage/" + "目錄文件夾下", Toast.LENGTH_SHORT).show();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
            try {
                out.flush();
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            mRp.getBitmap(bm, file.getAbsolutePath());
        }
    }

須要的接口

public interface ResultPhoto {
        int RESULT_CANCEL = 1;
        int RESULT_FAILED = 2;

        void getBitmap(Bitmap bitmap, String path);

        void cancel(int type);
    }

處理 onActivityResult

public void ActivityResult(int requestCode, int resultCode, Intent data, int width) {
        Log.i("RESULT", resultCode + "");
        if (resultCode == Activity.RESULT_OK) {
            switch (requestCode) {
                case RESULT_CAMERA_PATH:
                    if (isCrop) {
                        cropImg(mImageUri, width, RESULT_CAMERA_CROP_PATH_RESULT);
                    } else {
                        Bitmap bitmap = null;
                        try {
                            bitmap = BitmapFactory.decodeStream(mContext.getContentResolver().openInputStream(mImageUri));
                            saveBitmap(bitmap);

                        } catch (FileNotFoundException e) {
                            e.printStackTrace();
                        }
                    }
                    break;
                case RESULT_CAMERA_CROP_PATH_RESULT:
                    try {
                        Bitmap bitmap = BitmapFactory.decodeStream(mContext.getContentResolver().openInputStream(mImageCropUri));

                        saveBitmap(bitmap);
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }
                    break;
                case RESULT_ALBUM_CROP_PATH: {
                    String picPath = parsePicturePath(mContext, data.getData());
                    File file = new File(picPath);
                    Uri uri = Uri.fromFile(file);
                    if (isCrop) {
                        cropImg(uri, width, RESULT_ALBUM_CROP_PATH_RESULT);
                    } else {
                        Bitmap bitmap = BitmapFactory.decodeFile(picPath, null);
                        if (bitmap != null) {
                            Bitmap smallBmp = setScaleBitmap(bitmap, 2);
                            saveBitmap(smallBmp);
                        }
                    }
                }
                break;
                case RESULT_ALBUM_CROP_PATH_RESULT: {
                    Bitmap bitmap = BitmapFactory.decodeFile(getTempFile().getAbsolutePath(), null);
                    if (bitmap != null) {
                        Bitmap smallBmp = setScaleBitmap(bitmap, 2);
                        saveBitmap(smallBmp);
                    }
                }
                break;
            }
        } else if (resultCode == Activity.RESULT_CANCELED) {
            mRp.cancel(ResultPhoto.RESULT_CANCEL);
            return;
        } else {
            mRp.cancel(ResultPhoto.RESULT_FAILED);
            return;
        }
    }

成員變量

public static final int RESULT_CAMERA_PATH = 100;
    public static final int RESULT_CAMERA_CROP_PATH_RESULT = 301;

    private static final int RESULT_ALBUM_CROP_PATH = 302;
    private static final int RESULT_ALBUM_CROP_PATH_RESULT = 401;
    private Uri mImageUri;
    private Uri mImageCropUri;
    private ResultPhoto mRp;
    private Context mContext;
    private boolean isCrop;

Activity中onActivityResult()

 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        mCpu.ActivityResult(requestCode, resultCode, data, mWidth);
    }

觸發事件

 @Override
    public void onClick(View view) {
        mCpu = new CropPhotoUtils(this, CameraCropActivity.this);
        switch (view.getId()) {
            case R.id.btn_camera_only:
                mCpu.takeCamera();
                break;
            case R.id.btn_album:
                mCpu.takeAlbum();
                break;
            default:
                break;
        }
    }

實現接口

 @Override
    public void getBitmap(Bitmap bitmap, String path) {
        mImage.setImageBitmap(bitmap);
    }

    @Override
    public void cancel(int type) {
        if (type == 1) {
            ToastUtils.show(CameraCropActivity.this, "已取消選擇圖片");
        } else {
            ToastUtils.show(CameraCropActivity.this, "選擇圖片失敗");
        }
    }

大功告成