java试图在Android上访问摄像头

Question

所以我第一次在安卓工作室工作，我有一个非常重要的项目。我试图制作一个屏幕，显示一个摄像头（比如snapchat ui），上面有一些按钮，如下所示：

现在我正在编写以下代码：

package com.none.www.aarogya;

import 安卓.content.Intent;
import 安卓.graphics.Bitmap;
import 安卓.media.Image;
import 安卓.provider.MediaStore;
import 安卓.support.v7.app.AppCompatActivity;
import 安卓.os.Bundle;
import 安卓.view.View;
import 安卓.widget.ImageView;

public class HomeScreen extends AppCompatActivity {

    public static final int CAMERA_REQUEST = 10;
    private ImageView imgDumpCam;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home_screen);

        imgDumpCam = findViewById(R.id.imgDumpCam);


        btnTake = h(View v); {
            Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(cameraIntent, CAMERA_REQUEST);
        }

    @Override

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //If user choose okay than following code will work
        if(resultCode == RESULT_OK){
            if(requestCode == CAMERA_REQUEST){
                //we are hearing back from camera
            Bitmap cameraImage = (Bitmap) data.getExtras().get("data");
                // we get the image from the camera
            imgDumpCam .setImageBitmap(cameraImage);
            }
        }


    }
}
}

我发现以下错误：

Error:(24, 9) error: illegal start of expression
Error:(24, 16) error: illegal start of expression
Error:(24, 35) error: ')' expected
Error:(24, 37) error: illegal start of expression
Error:(24, 38) error: ';' expected
Error:(46, 1) error: class, interface, or enum expected
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

你能帮我解决这些错误吗

Answer 1

试着用这行代码从相机上获取图像

首先，在menifest中添加摄像头权限。xml 并检查运行时权限

然后添加这个代码

    login=findViewById(R.id.login);
    login.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            clickImageFromCamera();
        }
    });
}

public void clickImageFromCamera() {
       Intent camIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        if (camIntent.resolveActivity(getPackageManager()) != null) {
            startActivityForResult(camIntent, REQUEST_CAMERA);

    }
}
/*on activity result */
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_CAMERA && resultCode == RESULT_OK) {
        if (data != null && data.getExtras() != null) {

        }
    }
}

我有这个代码是为你工作的。如果你在代码方面有任何问题，请评论我

Answer 2

你说这句话是什么意思？如果你想在点击btnTake时拍摄照片，请执行以下操作

        import android.content.Intent;
        import android.graphics.Bitmap;
        import android.provider.MediaStore;
        import android.support.v7.app.AppCompatActivity;
        import android.os.Bundle;
        import android.view.View;
        import android.widget.Button;
        import android.widget.ImageView;

        public class HomeScreen extends AppCompatActivity {

            public static final int CAMERA_REQUEST = 10;
            private ImageView imgDumpCam;

            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_home_screen);
                imgDumpCam = findViewById(R.id.imgDumpCam);
                Button btnTake = findViewById(R.id.your_btn_take_id);
                btnTake.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                        startActivityForResult(cameraIntent, CAMERA_REQUEST);
                    }
                });
            }

            @Override
            protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                super.onActivityResult(requestCode, resultCode, data);
                //If user choose okay than following code will work
                if (resultCode == RESULT_OK) {
                    if (requestCode == CAMERA_REQUEST) {
                        //we are hearing back from camera
                        Bitmap cameraImage = (Bitmap) data.getExtras().get("data");
                        // we get the image from the camera
                        imgDumpCam.setImageBitmap(cameraImage);
                    }
                }

            }
        }