Попробуйте этот код, он работает для меня
MainActivity.java
package com.example.myapplication;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.Toast;
public class MainActivity extends Activity {
private ImageSurfaceView mImageSurfaceView;
private Camera camera;
RelativeLayout rl,cameraLayout;
LinearLayout saveLayout;
private FrameLayout cameraPreviewLayout;
private ImageView capturedImageHolder,saveImage;
int imageL,imageT,imageW,imageH,width,height,dpsize;
Bitmap resizedBitmap;
Camera mCamera = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
cameraPreviewLayout = (FrameLayout)findViewById(R.id.camera_preview);
capturedImageHolder = (ImageView)findViewById(R.id.captured_image);
rl = findViewById(R.id.rr2);
cameraLayout = findViewById(R.id.cameraLayout);
saveLayout = findViewById(R.id.saveLayout);
saveImage = findViewById(R.id.saveImage);
width= getWindowManager().getDefaultDisplay().getWidth();
height= getWindowManager().getDefaultDisplay().getHeight();
camera = checkDeviceCamera();
mImageSurfaceView = new ImageSurfaceView(MainActivity.this, camera);
cameraPreviewLayout.addView(mImageSurfaceView);
dpsize = (int) (getResources().getDimension(R.dimen._150sdp));
capturedImageHolder.setX((width-dpsize)/2);
capturedImageHolder.setY((height -dpsize)/2);
imageL= (int) capturedImageHolder.getX();
imageT= (int) capturedImageHolder.getY();
capturedImageHolder.setOnTouchListener(new MoveViewTouchListener(capturedImageHolder));
Button captureButton = (Button)findViewById(R.id.button);
captureButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
camera.takePicture(null, null, pictureCallback);
}
});
}
private Camera checkDeviceCamera(){
try {
mCamera = Camera.open();
} catch (Exception e) {
e.printStackTrace();
}
return mCamera;
}
public void resetCamera()
{
if(mCamera!=null) {
mCamera.release();
}
}
PictureCallback pictureCallback = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Bitmap b = BitmapFactory.decodeByteArray(data, 0, data.length);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
final int REQUIRED_SIZE = 512;
int scale = 1;
int wd= b.getWidth();
while (wd >=( REQUIRED_SIZE)) {
wd= wd/2;
scale *= 2;
}
options.inSampleSize = scale;
options.inJustDecodeBounds = false;
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
if(bitmap==null){
Toast.makeText(MainActivity.this, "Captured image is empty", Toast.LENGTH_LONG).show();
return;
}
Matrix matrix = new Matrix();
matrix.postRotate(90);
bitmap= Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),matrix,false);
int bh= bitmap.getHeight();
int bw= bitmap.getWidth();
width= rl.getWidth();
height= rl.getHeight();
int l = imageL*bw/width;
int t = imageT*bh/height;
int w = capturedImageHolder.getWidth()*bw/width;
int h = capturedImageHolder.getHeight()*bh/height;
cameraPreviewLayout.setVisibility(View.GONE);
capturedImageHolder.setVisibility(View.VISIBLE);
resizedBitmap= Bitmap.createBitmap(bitmap,l,t,w,h);
if(resizedBitmap!=null) {
cameraLayout.setVisibility(View.GONE);
saveLayout.setVisibility(View.VISIBLE);
saveImage.setImageBitmap(resizedBitmap);
}
}
};
public class MoveViewTouchListener
implements View.OnTouchListener
{
private GestureDetector mGestureDetector;
private View mView;
public MoveViewTouchListener(View view)
{
mGestureDetector = new GestureDetector(view.getContext(), mGestureListener);
mView = view;
}
@Override
public boolean onTouch(View v, MotionEvent event)
{
return mGestureDetector.onTouchEvent(event);
}
private GestureDetector.OnGestureListener mGestureListener = new GestureDetector.SimpleOnGestureListener()
{
private float mMotionDownX, mMotionDownY;
@Override
public boolean onDown(MotionEvent e)
{
mMotionDownX = e.getRawX() - mView.getTranslationX();
mMotionDownY = e.getRawY() - mView.getTranslationY();
imageL= (int) mView.getX();
imageT= (int) mView.getY();
Log.d("imageview"," down");
return true;
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY)
{
mView.setTranslationX(e2.getRawX() - mMotionDownX);
mView.setTranslationY(e2.getRawY() - mMotionDownY);
imageL= (int) mView.getX();
imageT= (int) mView.getY();
if((distanceX==0)&&(distanceY==0))
{
Log.d("imageview"," zoomed");
}
return true;
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
Log.d("imageview"," tapped");
return true;
}
};
}
}
activiy_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/rl"
>
<RelativeLayout
android:id="@+id/cameraLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:visibility="visible">
<RelativeLayout
android:id="@+id/rr2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:elevation="5sp"
android:gravity="center">
<ImageView
android:id="@+id/captured_image"
android:layout_width="180sp"
android:layout_height="180sp"
android:elevation="8sp" />
<FrameLayout
android:id="@+id/camera_preview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true" />
</RelativeLayout>
<Button
android:gravity="center_horizontal"
android:id="@+id/button"
android:layout_width="50sp"
android:layout_height="49dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:background="@drawable/squarecamera__camera_snap_selected"
android:elevation="10dp" />
</RelativeLayout>
<LinearLayout
android:visibility="gone"
android:id="@+id/saveLayout"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:minHeight="200sp"
android:minWidth="200sp"
android:layout_gravity="center"
android:id="@+id/saveImage"
android:layout_width="200sp"
android:layout_height="200sp" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>
ImageSurfaceView.java
package com.example.myapplication;
import android.content.Context;
import android.hardware.Camera;
import android.util.Log;
import android.view.Display;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.WindowManager;
import java.io.IOException;
import static android.content.Context.WINDOW_SERVICE;
public class ImageSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
private Camera mCamera;
private SurfaceHolder surfaceHolder;
Context context;
boolean isPreviewRunning = false;
public ImageSurfaceView(Context context, Camera camera) {
super(context);
this.mCamera = camera;
this.context = context;
this.surfaceHolder = getHolder();
this.surfaceHolder.addCallback(this);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
this.mCamera.setPreviewDisplay(holder);
this.mCamera.startPreview();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (isPreviewRunning) {
mCamera.stopPreview();
}
Display display = ((WindowManager)context.getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
if(display.getRotation() == Surface.ROTATION_0) {
mCamera.setDisplayOrientation(90);
}
if(display.getRotation() == Surface.ROTATION_90) {
}
if(display.getRotation() == Surface.ROTATION_180) {
}
if(display.getRotation() == Surface.ROTATION_270) {
mCamera.setDisplayOrientation(180);
}
previewCamera();
}
public void previewCamera() {
try {
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
isPreviewRunning = true;
} catch(Exception e) {
Log.d("hsfhj", "Cannot start preview", e);
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
this.mCamera.stopPreview();
this.mCamera.release();
}
}
- ImageSurfaceView предназначен для функций камеры.
- MoveViewTouchListener - это класс для перемещения квадратного изображения по поверхности камеры.
- Действие обрезки работает внутри pictureCallback;
person
Athira
schedule
18.06.2018
