调用系统相机拍照获取图片或者从相册中调用本地图片显示问题

来源：互联网发布：始作俑者其无后乎编辑：程序博客网时间：2024/05/04 21:01

需求是这样的：打开系统或者第三方相机app拍照，然后使用所拍照片进行处理，或者直接调用系统或者第三方相册app，选择图片返回使用。需求很简单，过程很蛋疼，网上有很多方法，不过有很多不好用的地方，最后使用的这种方式还不错，记录一下，还是那句话，我很懒，以后复制使用直接复制代码：

1.调用相机拍照返回所拍照片(不是缩略图)，点击按钮，调用相机：

          Intent intent = new Intent();          intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);          File file = new File(getExternalFilesDir(Environment.DIRECTORY_DCIM) +"/bidata");          if (!file.exists()) {                 file.mkdirs();             }          intent.putExtra(MediaStore.Images.Media.ORIENTATION, 0);          intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(file, "cameraTmp.png")));          startActivityForResult(intent, 0);

获取所得照片：

    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        if (resultCode == RESULT_OK) {            switch (requestCode) {                case 0:                     Bitmap bitmap = CommonUtils.getBitmap(this, getExternalFilesDir(Environment.DIRECTORY_DCIM) + "/bidata/"+ "cameraTmp.png");                    break;        }        super.onActivityResult(requestCode, resultCode, data);    }

2.调用相册获取图片

     Intent picture = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);     startActivityForResult(picture, 1);

获取所得到的图片：

    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        if (resultCode == RESULT_OK) {            switch (requestCode) {                case 1:                    CommonUtils.bitmap = BitmapFactory.decodeFile(CommonUtils.getRealFilePath(this, data.getData()));                    break;            }        }        super.onActivityResult(requestCode, resultCode, data);    }

最后把两个加载bitmap的方法贴出来：

    /**     * 由string类型的路径加载图片     *     * @param context     * @param path     * @return     */    public static Bitmap getBitmap(Context context, String path) {        Uri uri = Uri.fromFile(new File(path));        InputStream in = null;        try {            in = context.getContentResolver().openInputStream(uri);            // Decode image size            BitmapFactory.Options o = new BitmapFactory.Options();            o.inJustDecodeBounds = true;            BitmapFactory.decodeStream(in, null, o);            in.close();            int scale = 1;            if (o.outHeight > 1024 || o.outWidth > 1024) {                scale = (int) Math.pow(                        2,                        (int) Math.round(Math.log(1024 / (double) Math.max(                                o.outHeight, o.outWidth)) / Math.log(0.5)));            }            if (scale < 4) {                scale = 4;            }            BitmapFactory.Options o2 = new BitmapFactory.Options();            o2.inSampleSize = scale;            in = context.getContentResolver().openInputStream(uri);            Bitmap b = BitmapFactory.decodeStream(in, null, o2);            in.close();            return b;        } catch (FileNotFoundException e) {        } catch (IOException e) {        }        return null;    }    /**     * 将图片的uri转为绝对路径     *     * @param context     * @param uri     * @return     */    public static String getRealFilePath(final Context context, final Uri uri) {        if (null == uri)            return null;        final String scheme = uri.getScheme();        String data = null;        if (scheme == null)            data = uri.getPath();        else if (ContentResolver.SCHEME_FILE.equals(scheme)) {            data = uri.getPath();        } else if (ContentResolver.SCHEME_CONTENT.equals(scheme)) {            Cursor cursor = context.getContentResolver().query(uri,                    new String[]{MediaStore.Images.ImageColumns.DATA}, null, null, null);            if (null != cursor) {                if (cursor.moveToFirst()) {                    int index = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);                    if (index > -1) {                        data = cursor.getString(index);                    }                }                cursor.close();            }        }        return data;    }

也希望对有需要的战友有帮助。。。。

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