android打开系统相机分别获得原图和缩略图

来源：互联网发布：循迹小车c语言程序编辑：程序博客网时间：2024/05/16 13:58

第一种：获得缩略图：

打开相机

  private void photo() {        Intent openCameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        startActivityForResult(openCameraIntent, TAKE_PICTURE);    }

这里使用data得到的只是缩略图，大小一般30k左右，一般用在手机展示如头像这种小图，想上传图片数据到服务器就不合适了！

protected void onActivityResult(int requestCode, int resultCode, Intent data) {    if (resultCode == RESULT_OK) {        switch (requestCode) {            case TAKE_PICTURE:                String fileName = String.valueOf(System.currentTimeMillis());                Bitmap bm = (Bitmap) data.getExtras().get("data");                String path = FileUtils.saveBitmap(bm, fileName);                if (!StringUtil.isBland(path)) {                    String decodePath = FileUtils.saveBitmap(UIUtils.decodeBitmap(path), "decode" + fileName);                    if (!StringUtil.isBland(decodePath)) {                        selectImagesDecodePath.add(decodePath);                        selectImagesPath.add(path);                        showAdapter();                    }                }                break;        }    }    super.onActivityResult(requestCode, resultCode, data);}

第二种：获得原图

打开相机

private void photo() {    File dir = new File(Environment.getExternalStorageDirectory() + "/DataCollect/");    if (!dir.exists()) dir.mkdirs();    Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);    localTempImg = System.currentTimeMillis();    localTempImgFileName = localTempImg + ".jpg";    File f = new File(dir, localTempImgFileName);    Uri u = Uri.fromFile(f);    intent.putExtra(MediaStore.Images.Media.ORIENTATION, 0);    intent.putExtra(MediaStore.EXTRA_OUTPUT, u);    startActivityForResult(intent, TAKE_PICTURE);}

这里的f.getAbsolutePath()就是原图的路径了：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {    if (resultCode == RESULT_OK) {        switch (requestCode) {            case TAKE_PICTURE:                File f = new File(Environment.getExternalStorageDirectory()                        + "/DataCollect/" + localTempImgFileName);                LogUtils.e(f.getAbsolutePath());                if (!StringUtil.isBland(f.getAbsolutePath())) {                    String decodePath = FileUtils.saveBitmap(UIUtils.decodeBitmap(f.getAbsolutePath()), "decode" + localTempImg);                    if (!StringUtil.isBland(decodePath)) {                        selectImagesDecodePath.add(decodePath);                        selectImagesPoth.add(f.getAbsolutePath());                        showAdapter();                    }                }                break;        }    }    super.onActivityResult(requestCode, resultCode, data);}

这里可能用到他的Uri数据，

  Uri u=Uri.parse(android.provider.MediaStore.Images.Media.insertImage(getContentResolver(),    f.getAbsolutePath(), null, null));

由相机或图库中的图片bitmap与uri互相转换
1、bitmap to uri

Uri uri = Uri.parse(MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, null,null));

2、uri to bitmap

Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), uri);

权限：

<uses-permission Android:name="android.permission.WRITE_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

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