android studio 11的拍照和打开相册 java代码

Android Studio 11（实际上是Android Studio 4.2及更高版本，因为官方并没有11这个版本）中的拍照和打开相册功能通常通过`CameraX`库和`ACTION_IMAGE_CAPTURE`或`ACTION_PICK.getImageUri()`来实现。以下是简单的示例代码：

**拍照功能：**

import android.content.Intent;
import android.graphics.ImageReader;
import android.os.Bundle;
import android.util.Size;
import android.widget.Button;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.camera.core.CameraX;
import androidx.camera.core.ImageCapture;
import androidx.camera.core.ImageCaptureConfig;
import androidx.camera.core.ImageProxy;

public class MainActivity extends AppCompatActivity {
    private ImageCapture imageCapture;

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

        Button takePhotoButton = findViewById(R.id.button_take_photo);
        takePhotoButton.setOnClickListener(view -> {
            openImageCapture();
        });

        setupCamera();
    }

    private void setupCamera() {
        ImageCaptureConfig.Builder configBuilder = new ImageCaptureConfig.Builder()
                .setTargetAspectRatio(new Size(16, 9)) // 设置图片的比例
                .setCaptureMode(ImageCapture.CAPTURE_MODE_REACTIVE); // 活动模式，支持连续拍摄

        ImageCaptureConfig config = configBuilder.build();

        imageCapture = new ImageCapture(config);
        try {
            CameraX.bindToLifecycle(this, imageCapture);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void openImageCapture() {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (intent.resolveActivity(getPackageManager()) != null) {
            startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
            ImageProxy imageProxy = imageCapture.getOutputImageFromResult(data);
            handleCapturedImage(imageProxy);
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    private void handleCapturedImage(@NonNull ImageProxy imageProxy) {
        imageProxy.close(); // 关闭图像代理
        // ... 这里处理获取到的图片数据
    }

    private static final int REQUEST_IMAGE_CAPTURE = 100; // 请求码
}

**打开相册选择图片功能：**

private void openGallery() {
    Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(intent, REQUEST_PICK_IMAGE);
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_PICK_IMAGE && resultCode == RESULT_OK) {
        Uri selectedImageUri = data.getData();
        // ... 这里处理选中的图片URI
    }
    super.onActivityResult(requestCode, resultCode, data);
}

private static final int REQUEST_PICK_IMAGE = 200; // 请求码

请注意，实际项目中还需要适配运行时权限请求、处理异常以及添加必要的错误处理代码。