我想让用户拍摄他的手机照片或从画廊获取照片并将其添加到recyclerView列表，每次他拍照时，回收者列表会自动增加，如果我从drawable获得照片，我现在想要从相机或画廊获取它。如何实现它谢谢
public void dialogShowPhoto() {
String takephoto = getString(R.string.take_photo);
String chooseFromLibrary = getString(R.string.choose_from_library);
String cancel = "cancel";
String addPhoto = "add photo";
final CharSequence[] items = {takephoto, chooseFromLibrary, cancel};
android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(this);
builder.setTitle(addPhoto);
final String finalTakephoto = takephoto;
final String finalChooseFromLibrary = chooseFromLibrary;
final String finalCancel = cancel;
builder.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int item) {
if (items[item].equals(finalTakephoto)) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, REQUEST_CAMERA);
} else if (items[item].equals(finalChooseFromLibrary)) {
Intent intent = new Intent(
Intent.ACTION_PICK,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, RESULT_LOAD_IMAGE);
} else if (items[item].equals(finalCancel)) {
dialog.dismiss();
}
}
});
builder.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CAMERA && resultCode == Activity.RESULT_OK) {
selectedImageWork.setAlpha(1f);
Bitmap photo = (Bitmap) data.getExtras().get("data");
// selectedImage.setImageBitmap(photo);
Matrix mat = new Matrix();
mat.postRotate(Integer.parseInt("270"));
Bitmap bMapRotate = Bitmap.createBitmap(photo, 0, 0, photo.getWidth(), photo.getHeight(), mat, true);
selectedImageWork.setImageBitmap(bMapRotate);
}
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && data != null) {
Uri selectedImageURI = data.getData();
PlaceWorkModel placeWorkModel = new PlaceWorkModel(); // the model between activity and adapter
placeWorkModel.setPhoto(Integer.parseInt(convertImage2Base64())); // here i pass the photo
picturesList.add(placeWorkModel);
mAdapter.notifyDataSetChanged();
}
}
// this method will convert the image to base64
public String convertImage2Base64() {
Bitmap bitmap = ((BitmapDrawable) selectedImageWork.getDrawable()).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream);
byte[] image = stream.toByteArray();
return ("data:image/jpeg;base64," + Base64.encodeToString(image, 0));
}
模型类
public class PlaceWorkModel {
private int photo;
public PlaceWorkModel(int photo) {
this.photo = photo;
}
public PlaceWorkModel() {
}
public int getPhoto() {
return photo;
}
public void setPhoto(int photo) {
this.photo = photo;
}
适配器
private Context mContext;
private List<PlaceWorkModel> picturesList;
public class MyViewHolder extends RecyclerView.ViewHolder {
private ImageView picture;
public MyViewHolder(View view) {
super(view);
picture = (ImageView) view.findViewById(R.id.PlaceWorkRecycler_imageview_Picture);
}
}
public PlaceWorkRecyclerAdapter(Context mContext, ArrayList<PlaceWorkModel> picturesList) {
this.mContext = mContext;
this.picturesList = picturesList;
}
@Override
public PlaceWorkRecyclerAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.placework_recycler_adapterlayout, parent, false);
return new PlaceWorkRecyclerAdapter.MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(final PlaceWorkRecyclerAdapter.MyViewHolder holder, int position) {
PlaceWorkModel listOfPictures = picturesList.get(position);
// loading picturesList using Glide library
Glide.with(mContext).load(listOfPictures.getPhoto())
.into(holder.picture);
}
@Override
public int getItemCount() {
return picturesList.size();
}
这是错误LogCat
12-16 17:50:47.630 11450-11476/com.foodservices.index.foodservices E/FA: Failed to send current screen to service
12-16 17:50:47.636 11450-11476/com.foodservices.index.foodservices E/FA: Discarding data. Failed to send event to service
12-16 17:50:49.317 11450-11450/com.foodservices.index.foodservices E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.foodservices.index.foodservices, PID: 11450
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2, result=-1, data=Intent { dat=content://com.google.android.apps.photos.contentprovider/-1/1/content://media/external/images/media/62/ORIGINAL/NONE/681675800 flg=0x1 clip={text/uri-list U:content://com.google.android.apps.photos.contentprovider/-1/1/content%3A%2F%2Fmedia%2Fexternal%2Fimages%2Fmedia%2F62/ORIGINAL/NONE/681675800} }} to activity {com.foodservices.index.foodservices/com.index.foodServices.common.view.activities.PlaceWorkActivity}: java.lang.ClassCastException: android.graphics.drawable.StateListDrawable cannot be cast to android.graphics.drawable.BitmapDrawable
at android.app.ActivityThread.deliverResults(ActivityThread.java:4268)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4312)
at android.app.ActivityThread.-wrap19(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1644)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.ClassCastException: android.graphics.drawable.StateListDrawable cannot be cast to android.graphics.drawable.BitmapDrawable
at com.index.foodServices.common.view.activities.PlaceWorkActivity.convertImage2Base64(PlaceWorkActivity.java:196)
at com.index.foodServices.common.view.activities.PlaceWorkActivity.onActivityResult(PlaceWorkActivity.java:184)
at android.app.Activity.dispatchActivityResult(Activity.java:7267)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4264)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4312)
at android.app.ActivityThread.-wrap19(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1644)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
您没有将更新的列表设置为适配器。
在适配器中，添加功能更新
public void updateList(List<PlaceWorkModel> picturesList) {
this.picturesList = picturesList;
notifyDataSetChanged();
}
然后，
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && data != null) {
Uri selectedImageURI = data.getData();
PlaceWorkModel placeWorkModel = new PlaceWorkModel(); // the model between activity and adapter
placeWorkModel.setPhoto(Integer.parseInt(convertImage2Base64())); // here i pass the photo
picturesList.add(placeWorkModel);
mAdapter.updateList(picturesList); // add this
mAdapter.notifyDataSetChanged();
}
也许easyImage库会帮助你
这里有一个示例，说明如何使用该库从设备拍摄照片并将其保存到您的应用程序中，之后您可以将其设置为您的视图
private void OpenImage() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Options");
builder.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
if (items[i].equals("Camera")) {
EasyImage.openCamera(EditorActivity.this, REQUEST_CODE_CAMERA);
} else if (items[i].equals("Gallery")) {
EasyImage.openGallery(EditorActivity.this, REQUEST_CODE_GALLERY);
}
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
EasyImage.handleActivityResult(requestCode, resultCode, data, this, new DefaultCallback() {
@Override
public void onImagePicked(File imageFile, EasyImage.ImageSource source, int type) {
switch (type) {
case REQUEST_CODE_CAMERA:
Glide.with(EditorActivity.this)
.load(imageFile)
.centerCrop()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(img);
saveImage(imageFile.getAbsolutePath());
break;
case REQUEST_CODE_GALLERY:
Glide.with(EditorActivity.this)
.load(imageFile)
.centerCrop()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(img);
saveImage(imageFile.getAbsolutePath());
break;
}
}
});
}
private void saveImage(String imagePath) {
pictureChanged = true;
try {
FileInputStream file = new FileInputStream(imagePath);
byte[] image = new byte[file.available()];
file.read(image);
} catch (IOException e) {
e.printStackTrace();
}
}
我认为问题在于您的convertImage2Base64尝试将其更改为类似下面的内容
public byte[] convertImage2Base64() {
Bitmap bitmap = ((BitmapDrawable) selectedImageWork.getDrawable()).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream);
byte[] image = Base64.decode(stream.toByteArray(), Base64.DEFAULT);
return image;
}
并按如下所示更改您的模型。
public class PlaceWorkModel {
private byte[] photo;
public PlaceWorkModel(byte[] photo) {
this.photo = photo;
}
public PlaceWorkModel() {
}
public byte[] getPhoto() {
return photo;
}
public void setPhoto(byte[] photo) {
this.photo = photo;
}
我假设你能够在片段/活动中调用函数并从图库或摄像头获取图像，唯一的问题是没有加载图像的滑动。试试这个，让我知道它是否有效。