我是Android开发的新手，我想创建一个像这个应用程序https://play.google.com/store/apps/details?id=com.MenFashionPhotoSuit.FashionPhotoMontage&hl=en
的应用程序我创建了自定义相机表格，相机正常工作现在我想在相机启动时在相机上显示图像网格视图。我在相机上添加了图像视图，当相机打开时，图像也显示在屏幕上，但是当我捕捉图片的时候，我只需要在屏幕上显示拍摄的图像，我还需要显示我在相机上放置的图像。请帮我解决这个问题....
public class MainActivity extends Activity implements Callback,
OnClickListener {
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
private Camera camera;
private Button flipCamera;
private Button flashCameraButton;
private Button captureImage;
private int cameraId;
private boolean flashmode = false;
private int rotation;
ImageView img;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// camera surface view created
cameraId = CameraInfo.CAMERA_FACING_BACK;
flipCamera = (Button) findViewById(R.id.flipCamera);
flashCameraButton = (Button) findViewById(R.id.flash);
captureImage = (Button) findViewById(R.id.captureImage);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
flipCamera.setOnClickListener(this);
captureImage.setOnClickListener(this);
img=(ImageView)findViewById(R.id.image1);
flashCameraButton.setOnClickListener(this);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
if (Camera.getNumberOfCameras() > 1) {
flipCamera.setVisibility(View.VISIBLE);
}
if (!getBaseContext().getPackageManager().hasSystemFeature(
PackageManager.FEATURE_CAMERA_FLASH)) {
flashCameraButton.setVisibility(View.GONE);
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (!openCamera(CameraInfo.CAMERA_FACING_BACK)) {
alertCameraDialog();
}
}
private boolean openCamera(int id) {
boolean result = false;
cameraId = id;
releaseCamera();
img.setImageResource(R.drawable.close_unpresed1);
try {
camera = Camera.open(cameraId);
} catch (Exception e) {
e.printStackTrace();
}
if (camera != null) {
try {
setUpCamera(camera);
camera.setErrorCallback(new ErrorCallback() {
@Override
public void onError(int error, Camera camera) {
}
});
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
result = true;
} catch (IOException e) {
e.printStackTrace();
result = false;
releaseCamera();
}
}
return result;
}
private void setUpCamera(Camera c) {
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(cameraId, info);
rotation = getWindowManager().getDefaultDisplay().getRotation();
int degree = 0;
switch (rotation) {
case Surface.ROTATION_0:
degree = 0;
break;
case Surface.ROTATION_90:
degree = 90;
break;
case Surface.ROTATION_180:
degree = 180;
break;
case Surface.ROTATION_270:
degree = 270;
break;
default:
break;
}
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
// frontFacing
rotation = (info.orientation + degree) % 330;
rotation = (360 - rotation) % 360;
} else {
// Back-facing
rotation = (info.orientation - degree + 360) % 360;
}
c.setDisplayOrientation(rotation);
Parameters params = c.getParameters();
showFlashButton(params);
List<String> focusModes = params.getSupportedFlashModes();
if (focusModes != null) {
if (focusModes
.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
params.setFlashMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
}
}
params.setRotation(rotation);
}
private void showFlashButton(Parameters params) {
boolean showFlash = (getPackageManager().hasSystemFeature(
PackageManager.FEATURE_CAMERA_FLASH) && params.getFlashMode() != null)
&& params.getSupportedFlashModes() != null
&& params.getSupportedFocusModes().size() > 1;
flashCameraButton.setVisibility(showFlash ? View.VISIBLE
: View.INVISIBLE);
}
private void releaseCamera() {
try {
if (camera != null) {
camera.setPreviewCallback(null);
camera.setErrorCallback(null);
camera.stopPreview();
camera.release();
camera = null;
}
} catch (Exception e) {
e.printStackTrace();
Log.e("error", e.toString());
camera = null;
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.flash:
flashOnButton();
break;
case R.id.flipCamera:
flipCamera();
break;
case R.id.captureImage:
takeImage();
break;
default:
break;
}
}
private void takeImage() {
camera.takePicture(null, null, new PictureCallback() {
private File imageFile;
@Override
public void onPictureTaken(byte[] data, Camera camera) {
try {
// convert byte array into bitmap
Bitmap loadedImage = null;
Bitmap rotatedBitmap = null;
loadedImage = BitmapFactory.decodeByteArray(data, 0,
data.length);
// rotate Image
Matrix rotateMatrix = new Matrix();
rotateMatrix.postRotate(rotation);
rotatedBitmap = Bitmap.createBitmap(loadedImage, 0, 0,
loadedImage.getWidth(), loadedImage.getHeight(),
rotateMatrix, false);
String state = Environment.getExternalStorageState();
File folder = null;
if (state.contains(Environment.MEDIA_MOUNTED)) {
folder = new File(Environment
.getExternalStorageDirectory() + "/Demo");
} else {
folder = new File(Environment
.getExternalStorageDirectory() + "/Demo");
}
boolean success = true;
if (!folder.exists()) {
success = folder.mkdirs();
}
if (success) {
java.util.Date date = new java.util.Date();
imageFile = new File(folder.getAbsolutePath()
+ File.separator
+ new Timestamp(date.getTime()).toString()
+ "Image.jpg");
imageFile.createNewFile();
} else {
Toast.makeText(getBaseContext(), "Image Not saved",
Toast.LENGTH_SHORT).show();
return;
}
ByteArrayOutputStream ostream = new ByteArrayOutputStream();
// save image into gallery
rotatedBitmap.compress(CompressFormat.JPEG, 100, ostream);
FileOutputStream fout = new FileOutputStream(imageFile);
fout.write(ostream.toByteArray());
fout.close();
ContentValues values = new ContentValues();
values.put(Images.Media.DATE_TAKEN,
System.currentTimeMillis());
values.put(Images.Media.MIME_TYPE, "image/jpeg");
values.put(MediaStore.MediaColumns.DATA,
imageFile.getAbsolutePath());
MainActivity.this.getContentResolver().insert(
Images.Media.EXTERNAL_CONTENT_URI, values);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
private void flipCamera() {
int id = (cameraId == CameraInfo.CAMERA_FACING_BACK ? CameraInfo.CAMERA_FACING_FRONT
: CameraInfo.CAMERA_FACING_BACK);
if (!openCamera(id)) {
alertCameraDialog();
}
}
private void alertCameraDialog() {
AlertDialog.Builder dialog = createAlert(MainActivity.this,
"Camera info", "error to open camera");
dialog.setNegativeButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
dialog.show();
}
private Builder createAlert(Context context, String title, String message) {
AlertDialog.Builder dialog = new AlertDialog.Builder(
new ContextThemeWrapper(context,
android.R.style.Theme_Holo_Light_Dialog));
dialog.setIcon(R.drawable.ic_launcher);
if (title != null)
dialog.setTitle(title);
else
dialog.setTitle("Information");
dialog.setMessage(message);
dialog.setCancelable(false);
return dialog;
}
private void flashOnButton() {
if (camera != null) {
try {
Parameters param = camera.getParameters();
param.setFlashMode(!flashmode ? Parameters.FLASH_MODE_TORCH
: Parameters.FLASH_MODE_OFF);
camera.setParameters(param);
flashmode = !flashmode;
} catch (Exception e) {
// TODO: handle exception
}
}
}
}
xml文件
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<ImageView
android:id="@+id/image1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="Camera Demo application\nDeveloped by Ravi Sharma"
android:textColor="@android:color/black" />
<Button
android:id="@+id/captureImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="@dimen/activity_vertical_margin"
android:background="@drawable/back_unpresed2" />
<Button
android:id="@+id/flash"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="@dimen/activity_vertical_margin"
android:layout_marginRight="25dp"
android:layout_toLeftOf="@id/captureImage"
android:background="@drawable/check_unpresed1" />
<Button
android:id="@+id/flipCamera"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="@dimen/activity_vertical_margin"
android:layout_marginLeft="25dp"
android:layout_toRightOf="@id/captureImage"
android:background="@drawable/close_unpresed1" />
清单文件
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>