Android & Flutter 05 Camera++

androidFlutter05.java

public class MainActivity3 extends AppCompatActivity {
    ImageView iv;
    Bitmap imageBitmap;
    Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);
        ConstraintLayout c = (ConstraintLayout) findViewById(R.id.main3);

        button = new Button(this.getApplicationContext());
        button.setText("촬영");
        View.OnClickListener listener = new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                dispatchTakePictureIntent();
            }
        };
        button.setOnClickListener(listener);

        iv = new ImageView(this.getApplicationContext());
        iv.setBackgroundColor(Color.parseColor("#CCCCCC"));
        iv.setScaleType(ImageView.ScaleType.CENTER_CROP);
        int ivSize = Math.round(getResources().getDisplayMetrics().density * 200);
        iv.setMinimumWidth(ivSize);
        iv.setMinimumHeight(ivSize);

        c.addView(button);
        c.addView(iv);

    }
    static final int REQUEST_IMAGE_CAPTURE = 1;
    private void dispatchTakePictureIntent() {
        if(this.imageBitmap != null){
            this.clear();
            button.setText("촬영");
            return;
        }
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
            startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
        }
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
            Bundle extras = data.getExtras();
            imageBitmap = (Bitmap) extras.get("data");
            iv.setImageBitmap(imageBitmap);
            button.setText("지우기");
        }
    }

    void clear(){
        iv.setImageBitmap(null);
        imageBitmap = null;
    }
}