我有一个简单的flask应用，它接收一张图片，并从keras模型中返回预测结果。
烧瓶代码
@app.route('/route', methods=['GET','POST'])
def rose():
model = load_model('model.h5')
model.compile(loss='categorical_crossentropy',
optimizer='rmsprop',
metrics=['accuracy'])
img_width, img_height = 128, 128
img = Image.open(request.files['file'])
if img.mode != "RGB":
img.convert("RGB")
img = img.resize((img_width, img_height))
x = image.img_to_array(img)
x = np.expand_dims(x, axis=0)
images = np.vstack([x])
classes = model.predict(images)
return str(classes )
我需要使用camerakit-android从一个android应用程序上传图片：这是我的代码。
package com.bostanji.wardeh.ui.home;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.media.Image;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.provider.MediaStore;
import android.provider.Settings;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.Nullable;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProviders;
import com.bostanji.wardeh.R;
import com.wonderkiln.camerakit.CameraKitError;
import com.wonderkiln.camerakit.CameraKitEvent;
import com.wonderkiln.camerakit.CameraKitEventListener;
import com.wonderkiln.camerakit.CameraKitImage;
import com.wonderkiln.camerakit.CameraKitVideo;
import com.wonderkiln.camerakit.CameraView;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.lang.invoke.MethodHandles;
import java.net.Socket;
import java.util.List;
import java.util.concurrent.TimeUnit;
import dmax.dialog.SpotsDialog;
import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
public class HomeFragment extends Fragment {
private CameraView cameraView;
private Button button;
private AlertDialog waitingDialog;
private Dialog emptyDialog;
@Override
public void onResume() {
super.onResume();
cameraView.start();
}
@Override
public void onPause() {
super.onPause();
cameraView.stop();
}
public View onCreateView(@NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.fragment_home, container, false);
cameraView = root.findViewById(R.id.camera);
button = root.findViewById(R.id.btn_detect);
waitingDialog = new SpotsDialog.Builder().setContext(getContext()).setMessage("Please wait").setCancelable(false).build();
cameraView.addCameraKitListener(new CameraKitEventListener() {
@Override
public void onEvent(CameraKitEvent cameraKitEvent) {
}
@Override
public void onError(CameraKitError cameraKitError) {
}
@Override
public void onImage(final CameraKitImage cameraKitImage) {
//waitingDialog.show();
Bitmap bitmap = cameraKitImage.getBitmap();
final byte[] img = cameraKitImage.getJpeg();
final Bitmap uploadMap = bitmap;
bitmap = Bitmap.createScaledBitmap(bitmap, cameraView.getWidth(), cameraView.getHeight(), false);
cameraView.stop();
waitingDialog.show();
final Handler handler = new Handler();
new Thread(){
@Override
public void run() {
try {
OkHttpClient client = new OkHttpClient();
String postUrl= "flaskapp.com/route";
final MediaType MEDIA_TYPE_JPEG = MediaType.parse("image/jpeg");
RequestBody req = new MultipartBody.Builder().setType(MultipartBody.FORM)
.addFormDataPart("file","rose.jpeg", RequestBody.create(img, MEDIA_TYPE_JPEG)).build();
Request request = new Request.Builder()
.url(postUrl)
.post(req)
.build();
try {
Response response = client.newCall(request).execute();
final String r = response.body().string();
handler.post(new Runnable() {
@Override
public void run() {
waitingDialog.dismiss();
Toast.makeText(getContext(), r, Toast.LENGTH_LONG).show();
}
});
} catch (IOException e) {
e.printStackTrace();
}
} catch (Exception e) {
}
}
}.start();
}
@Override
public void onVideo(CameraKitVideo cameraKitVideo) {
}
});
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
cameraView.start();
cameraView.captureImage();
}
});
return root;
}
}
一旦我点击按钮拍摄图片并上传，等待对话框就会显示，并且永远保持这样的状态。P.S 我不需要在帖子请求中发送除了图片以外的其他任何东西，并等待响应。
你使用了一个过时的构造函数，这很容易出错。最好是使用 final Handler handler = new Handler(Looper.getMainLooper()); 此外，你只需在发布请求成功时发布你的消息。如果不成功，等待对话框将永远停留，所以它会更新你的代码。
@Override
public void onImage(final CameraKitImage cameraKitImage) {
//waitingDialog.show();
Bitmap bitmap = cameraKitImage.getBitmap();
final byte[] img = cameraKitImage.getJpeg();
final Bitmap uploadMap = bitmap;
bitmap = Bitmap.createScaledBitmap(bitmap, cameraView.getWidth(), cameraView.getHeight(), false);
cameraView.stop();
waitingDialog.show();
final Handler handler = new Handler(Looper.getMainLooper());
new Thread(){
@Override
public void run() {
try {
OkHttpClient client = new OkHttpClient();
String postUrl= "flaskapp.com/route";
final MediaType MEDIA_TYPE_JPEG = MediaType.parse("image/jpeg");
RequestBody req = new MultipartBody.Builder().setType(MultipartBody.FORM)
.addFormDataPart("file","rose.jpeg", RequestBody.create(img, MEDIA_TYPE_JPEG)).build();
Request request = new Request.Builder()
.url(postUrl)
.post(req)
.build();
Response response = client.newCall(request).execute();
final String r = response.body().string();
} catch (Exception e) {
Log.e('Camera', 'POST failed', e);
} finally {
handler.post(new Runnable() {
@Override
public void run() {
waitingDialog.dismiss();
Toast.makeText(getContext(), r, Toast.LENGTH_LONG).show();
}
});
}
}.start();
}