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我想要捕獲的圖像預覽在surfaceView.Capturing時間是每42毫秒。雖然捕獲我想發送這些images到byteArray此時服務器。爲安全起見，照片不能保存到sd.I必須用這個做一個video call。可誰能幫助我？請在表面預覽的每42毫秒捕獲圖像查看
Button take;
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
Camera.PictureCallback jpegCallback;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
checkPermission();
surfaceView = (SurfaceView) findViewById(R.id.surface);
surfaceHolder = surfaceView.getHolder();
take = (Button) findViewById(R.id.take);
take.setOnClickListener(this);
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
jpegCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", Toast.LENGTH_SHORT).show();
refreshCamera();
}
};
}
public void captureImage() throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
List<Camera.Size> sizes = param.getSupportedPreviewSizes();
Camera.Size selected = sizes.get(0);
param.setPreviewSize(selected.width,selected.height);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setDisplayOrientation(90);
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
public void refreshCamera() {
if (surfaceHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
}
}
private void requestPermission() {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 1);
}
private boolean checkPermission() {
int result = ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA);
if (result == PackageManager.PERMISSION_GRANTED) {
return true;
} else {
return false;
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case 1:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
} else {
}
break;
}
}
@Override
public void onPointerCaptureChanged(boolean hasCapture) {
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.take:{
try {
captureImage();
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}
因此而SurfaceView預覽我必須每42個米利斯照片作爲字節組，並將其發送
顯示您所做的事情。 –
你知道42毫秒有多小嗎？發送一個圖像到服務器將需要約3-5秒。所以當時有大約20張圖片排隊發送到服務器。 –
你到目前爲止嘗試過什麼？ – Maddy