android 选择图片 剪裁 拍照 兼容所有版本的代码

前言，版本兼容问题主要是由于4.4以前和4.4以后的Uri的格式不同所造成的错误

  资料 Android 4.4从图库选择图片,获取图片路径并裁剪

1.拍照 和选择图片 

  ①选择图片

intent = new Intent(Intent.ACTION_GET_CONTENT);
            intent.setType("image/*");
            startActivityForResult(intent, GALLERY_REQUEST_CODE);

  ②拍照
  

intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(intent, CAMERA_REQUEST_CODE);

2.获取系统传来的值

标记符
    private static int CAMERA_REQUEST_CODE = 1;
    private static int GALLERY_REQUEST_CODE = 2;
    private static int CROP_REQUEST_CODE = 3;



    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == CAMERA_REQUEST_CODE) {
            if (data == null) {
                return;
            } else { //拍照
                Bundle extras = data.getExtras();
                if (extras != null) {
                    Bitmap bm = extras.getParcelable("data");
                    Uri uri = saveBitmap(bm);
                    startImageZoom(uri);
                }
            }
        } else if (requestCode == GALLERY_REQUEST_CODE) {
            if (data == null) {//相册
                return;
            }
            Uri uri;
            uri = data.getData();
            Uri fileUri = convertUri(uri);
            startImageZoom(fileUri);
        } else if (requestCode == CROP_REQUEST_CODE) {
            if (data == null) {
                return;
            }//剪裁后的图片
            Bundle extras = data.getExtras();
            if (extras == null) {
                return;
            }
            Bitmap bm = extras.getParcelable("data");
            ShowImageView(bm);
        }
    }

3.图片选取后 根据Url 转成流 并保存

private Uri convertUri(Uri uri) {
        InputStream is = null;
        try {
            is = getContentResolver().openInputStream(uri);
            Bitmap bitmap = BitmapFactory.decodeStream(is);
            is.close();
            return saveBitmap(bitmap);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return null;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

4.保存图片 记得加权限

private Uri saveBitmap(Bitmap bm) {
        File tmpDir = new File(Environment.getExternalStorageDirectory()
                + "/xiaoxin");
        if (!tmpDir.exists()) {
            tmpDir.mkdir();
        }
        File img = new File(tmpDir.getAbsolutePath() + "love.png");
        try {
            FileOutputStream fos = new FileOutputStream(img);
            bm.compress(Bitmap.CompressFormat.PNG, 85, fos);
            fos.flush();
            fos.close();
            Toast.makeText(MainActivity.this, "成功了", Toast.LENGTH_SHORT).show();
            return Uri.fromFile(img);
        } catch (FileNotFoundException e) {
            Toast.makeText(MainActivity.this, "失敗了", Toast.LENGTH_SHORT).show();
            e.printStackTrace();
            return null;
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(MainActivity.this, "失敗了", Toast.LENGTH_SHORT).show();
            return null;
        }

    }

5.剪裁图片

/**
     * 剪裁图片
     * 
     * @param uri
     */
    private void startImageZoom(Uri uri) {
        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri, "image/*");
        intent.putExtra("crop", "true");
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        intent.putExtra("outputX", 150);
        intent.putExtra("outputY", 150);
        intent.putExtra("return-data", true);
        startActivityForResult(intent, CROP_REQUEST_CODE);
    }