如何在Android studio中获取拍到的照片中某点的RGB值(语言-java)

Question

已经成功通过代码完成了拍照并显示，现在希望可以获取图片中某点的RGB值

package com.example.lemon;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.core.app.NotificationCompat;

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.provider.MediaStore;
import androidx.annotation.Nullable;
import androidx.core.content.FileProvider;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.math.BigDecimal;
import java.text.NumberFormat;
import android.app.Activity;
import android.os.Bundle;
import android.util.EventLog.Event;
import android.view.MotionEvent;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;



public class Application<abc> extends AppCompatActivity {
    //全局变量
    public static final int TAKE_PHOTO = 1;
    private ImageView picture;
    private Uri imageUri;
    private Bitmap bitmap;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.appilication);
        Button takephoto = findViewById(R.id.take_photo);
        picture = findViewById(R.id.picture);
      
        takephoto.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                File outputImage = new File(getExternalCacheDir(), "output_image.jpg");
                try//判断图片是否存在，存在则删除在创建，不存在则直接创建
                {
                    if (outputImage.exists()) {
                        outputImage.delete();
                    }
                    outputImage.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                //判断运行设备的系统版本是否低于Android7.0
                if (Build.VERSION.SDK_INT >= 24) {
                    imageUri = FileProvider.getUriForFile(Application.this,
                            "com.example.Lemon.fileprovider", outputImage);

                } else {
                    imageUri = Uri.fromFile(outputImage);
                }
                //使用隐示的Intent，调用摄像头，并把它存储
                Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
                intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                startActivityForResult(intent, TAKE_PHOTO);
                //调用会返回结果的开启方式，返回成功的话，则把它显示出来
            }

        });
    }
    @SuppressLint("MissingSuperCall")
    @Override

    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

        switch (requestCode) {
            case TAKE_PHOTO:
                if (resultCode == RESULT_OK) {
                    try {
                        bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
                        picture.setImageBitmap(bitmap);
                        //将图片解析成Bitmap对象，并把它显现出
                        //
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }
                }
                break;
            default:
                break;
        }
    }
}

######结果如图所示

Answer 1

int color = (((BitmapDrawable)img.getDrawable()).getBitmap()).getPixel(x, y);
rgb[0] = (color & 0xff0000) >> 16; //R
rgb[1] = (color & 0xff00) >> 8; //G
rgb[2] = (color & 0xff); //B