Android图片选择器
1.辅助的权限管理类
/**
* 权限管理类
*/
public class PermissionManager {
private static final String TAG = "PermissionManager";
private static final int APP_REQUEST_CODE_ASK_LAUNCH_PERMISSIONS = 100;
private final Fragment mFragment;
private List<String> mAllPermissionList = new ArrayList<String>();
public PermissionManager(Fragment fragment) {
mFragment = fragment;
initAllPermissionList();
}
private void initAllPermissionList() {
mAllPermissionList.add(Manifest.permission.READ_EXTERNAL_STORAGE);
mAllPermissionList.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
mAllPermissionList.add(Manifest.permission.CAMERA);
}
private List<String> getNeedCheckPermissionList(List<String> permissionList) {
// all needed permissions, may be on or off
if (permissionList.size() <= 0) {
return permissionList;
}
List<String> needCheckPermissionsList = new ArrayList<String>();
for (String permission : permissionList) {
if (ContextCompat.checkSelfPermission(mFragment.getContext(), permission)
!= PackageManager.PERMISSION_GRANTED) {
Log.i(TAG, "getNeedCheckPermissionList() permission ="
+ permission);
needCheckPermissionsList.add(permission);
}
}
Log.i(TAG, "getNeedCheckPermissionList() listSize ="
+ needCheckPermissionsList.size());
return needCheckPermissionsList;
}
public boolean checkAllPermissions() {
List<String> needCheckPermissionsList = getNeedCheckPermissionList(mAllPermissionList);
if (needCheckPermissionsList.size() > 0) {
return false;
}
Log.i(TAG, "CheckAppPermissions(), all on");
return true;
}
public boolean requestAllPermissions() {
List<String> needCheckPermissionsList = getNeedCheckPermissionList(mAllPermissionList);
if (needCheckPermissionsList.size() > 0) {
// should show dialog
Log.i(TAG, "requestAllPermissions(), user check");
mFragment.requestPermissions(
needCheckPermissionsList.toArray(new String[needCheckPermissionsList.size()]),
APP_REQUEST_CODE_ASK_LAUNCH_PERMISSIONS);
return false;
}
Log.i(TAG, "requestAllPermissions(), all on");
return true;
}
public int getAllPermissionRequestCode() {
return APP_REQUEST_CODE_ASK_LAUNCH_PERMISSIONS;
}
public boolean isAllPermissionsResultReady(
String permissions[], int[] grantResults) {
for (int i = 0; i < grantResults.length; i++) {
if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
return true;
}
}
2.将uri解析成文件路径的工具类
/**
* Created by fuh on 2017/5/4.
* Email：[email protected]
*/
public class UriUtils {
/**
* 根据Uri的不同Scheme解析出在本机的路径
* @param context
* @param uri
* @return Uri的真实路径
*/
@TargetApi(19)
public static String formatUri(Context context, Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/"
+ split[1];
}
// TODO handle non-primary volumes
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"),
Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final 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;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[]{split[1]};
return getDataColumn(context, contentUri, selection,
selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
public static String getDataColumn(Context context, Uri uri, String selection,
String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {column};
try {
cursor = context.getContentResolver().query(uri, projection,
selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri
.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri
.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri
.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri
.getAuthority());
}
}
3.照片选择器Fragment类(没有UI的Fragment，只是为了好处理权限问题)
/**
* 从相册或相机选择头像
* @author yorek
* @date 16/01/2018
*/
public class PhotoChooseFragment extends Fragment {
public static final String TAG = "PhotoChooseFragment";
private PermissionManager mPermissionManager;
private Boolean isOpenCamera;
public interface OnPhotoChooseListener {
void onPhotoChooseSuccess(File cropFile);
}
private OnPhotoChooseListener mPhotoChooseListener;
public void setPhotoChooseListener(OnPhotoChooseListener listener) {
mPhotoChooseListener = listener;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPermissionManager = new PermissionManager(this);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if (mPermissionManager.getAllPermissionRequestCode() == requestCode) {
if (!mPermissionManager.isAllPermissionsResultReady(permissions, grantResults)) {
mPermissionManager.requestAllPermissions();
} else {
if (isOpenCamera == null) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
if (isOpenCamera) {
openCamera();
} else {
openGallery();
}
}
}
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
private static final int REQUEST_OPEN_CAMERA = 0x00a1;
private static final int REQUEST_OPEN_GALLERY = 0x00a2;
private static final int REQUEST_CROP_PHOTO = 0x00a3;
private Uri cameraPhotoUri;
public void openCamera() {
if (!mPermissionManager.checkAllPermissions()) {
isOpenCamera = true;
mPermissionManager.requestAllPermissions();
return;
}
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File cameraPhotoFile;
try {
cameraPhotoFile = createPictureFile();
} catch (Exception e) {
e.printStackTrace();
ToastUtils.showLongToast("文件创建失败：" + e.getMessage());
return;
}
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
cameraPhotoUri = Uri.fromFile(cameraPhotoFile);
} else {
cameraPhotoUri = FileProvider.getUriForFile(getContext(), Constants.FILE_CONTENT_FILEPROVIDER, cameraPhotoFile);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
}
intent.putExtra(MediaStore.EXTRA_OUTPUT, cameraPhotoUri);
startActivityForResult(intent, REQUEST_OPEN_CAMERA);
}
public void openGallery() {
if (!mPermissionManager.checkAllPermissions()) {
isOpenCamera = false;
mPermissionManager.requestAllPermissions();
return;
}
Intent intent = new Intent();
intent.setAction(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, REQUEST_OPEN_GALLERY);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode != Activity.RESULT_OK) {
return;
}
switch (requestCode) {
case REQUEST_OPEN_CAMERA:
cropPhoto(cameraPhotoUri);
break;
case REQUEST_OPEN_GALLERY:
if (data != null) {
Uri galleryPhotoUri = data.getData();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
String galleryPhotoPath = UriUtils.formatUri(getContext(), galleryPhotoUri);
galleryPhotoUri = FileProvider.getUriForFile(getContext(), Constants.FILE_CONTENT_FILEPROVIDER, new File(galleryPhotoPath));
}
cropPhoto(galleryPhotoUri);
}
break;
case REQUEST_CROP_PHOTO:
if (mPhotoChooseListener != null) {
mPhotoChooseListener.onPhotoChooseSuccess(cropPhotoFile);
}
getContext().revokeUriPermission(cropPhotoUri, Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
break;
default:
}
}
private Uri cropPhotoUri;
private File cropPhotoFile;
public void cropPhoto(Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
cropPhotoFile = null;
try {
cropPhotoFile = createCropPictureFile();
} catch (Exception e) {
e.printStackTrace();
ToastUtils.showLongToast("文件创建失败：" + e.getMessage());
return;
}
//7.0 安全机制下不允许保存裁剪后的图片
//所以仅仅将File Uri传入MediaStore.EXTRA_OUTPUT来保存裁剪后的图像
cropPhotoUri = Uri.fromFile(cropPhotoFile);
intent.setDataAndType(uri, "image/*");
intent.putExtra("crop", true);
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 300);
intent.putExtra("outputY", 300);
intent.putExtra("return-data", false);
intent.putExtra(MediaStore.EXTRA_OUTPUT, cropPhotoUri);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
startActivityForResult(intent, REQUEST_CROP_PHOTO);
}
private File createPictureFile() throws Exception {
String pictureFileName = String.format(Locale.getDefault(), "Picture_%s", new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date()));
File pictureDirName = getAvatarFile(getContext());
if (!pictureDirName.exists()) {
pictureDirName.mkdirs();
}
return File.createTempFile(
pictureFileName, /* prefix */
".jpg", /* suffix */
pictureDirName /* directory */
);
}
private File createCropPictureFile() throws Exception {
String cropPictureFileName = String.format(Locale.getDefault(), "Crop_%s", new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date()));
File cropPictureDirName = getAvatarFile(getContext());
if (!cropPictureDirName.exists()) {
cropPictureDirName.mkdirs();
}
return File.createTempFile(
cropPictureFileName, /* prefix */
".jpg", /* suffix */
cropPictureDirName /* directory */
);
}
public static File getAvatarFile(Context context) {
return new File(context.getExternalFilesDir(Environment.DIRECTORY_PICTURES), "avatar");
}
}
4.怎么使用
class MineFragment : BaseFragment(),
PhotoChooseFragment.OnPhotoChooseListener {
private var mPhotoChooseFragment: PhotoChooseFragment? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
// 初始化PhotoChooseFragment
mPhotoChooseFragment = childFragmentManager.findFragmentByTag(PhotoChooseFragment.TAG) as? PhotoChooseFragment
if (mPhotoChooseFragment == null) {
mPhotoChooseFragment = PhotoChooseFragment()
mPhotoChooseFragment!!.setPhotoChooseListener(this)
childFragmentManager
.beginTransaction()
.add(mPhotoChooseFragment, PhotoChooseFragment.TAG)
.commitAllowingStateLoss()
}
}
override fun onPicked(
pickerBSDialogFragment: BottomPickerDialogFragment,
position: Int,
selected: String
) {
// 根据用户选择打开相机或者相册
when (position) {
0 -> mPhotoChooseFragment?.openCamera()
1 -> mPhotoChooseFragment?.openGallery()
}
}
override fun onPhotoChooseSuccess(cropFile: File?) {
// 选择文件后的回调
if (cropFile == null) {
ToastUtils.showLongToast("文件异常，请重试。")
return
}
// TODO 上传并加载头像
}
}
Danger
注意在AndroidManifest中注册权限，以及处理好N以上平台的FileProvider问题
后记，其实拿到了原始数据后，往自己的文件夹重新写入一下，应该是一个更安全的方式。