Android studio 拍照后图片在imageview显示出来

可以使用以下代码在Android中拍照并将图像显示在ImageView上：

// 在AndroidManifest.xml中添加Camera权限
<uses-permission android:name="android.permission.CAMERA" />

// MainActivity.java文件中的代码
public class MainActivity extends AppCompatActivity {

    private ImageView imageView;
    static final int REQUEST_IMAGE_CAPTURE = 1;

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

        imageView = findViewById(R.id.imageView);

        //监听按钮点击事件
        Button takePhotoButton = findViewById(R.id.button);
        takePhotoButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                dispatchTakePictureIntent();
            }
        });
    }

    // 适用于拍照的Intent
    private void dispatchTakePictureIntent() {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
            startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
        }
    }

    // 拍照后显示图片在ImageView上
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
            Bundle extras = data.getExtras();
            Bitmap imageBitmap = (Bitmap) extras.get("data");
            imageView.setImageBitmap(imageBitmap);
        }
    }
}

这段代码将启动相机应用程序，并等待您拍照。在用户拍照后，使用 `onActivityResult()` 将图像显示在 ImageView 中。