public class MainActivity extends AppCompatActivity {
private SurfaceView sv_camera_surfaceview;
private android.hardware.Camera camera;
private SurfaceHolder surfaceholder;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sv_camera_surfaceview = (SurfaceView) findViewById(R.id.sv_camera_sufaceview);
sv_camera_surfaceview.getHolder().addCallback(new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open();//开启摄像头
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Camera.Parameters parameters = camera.getParameters();
parameters.setPictureFormat(ImageFormat.NV21);
parameters.setPreviewFormat(ImageFormat.NV21);
//parameters.setPictureFormat(ImageFormat.NV21);
//设置格式
//parameters.getSupportedPictureSizes();
//parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);//自动聚焦
//parameters.setPreviewSize(900,240);
/* WindowManager windowManager = getWindowManager();
Display display = windowManager.getDefaultDisplay();
int screenWidth = screenWidth = display.getWidth();
int screenHeight = screenHeight = display.getHeight();
parameters.setPictureSize(screenWidth, screenHeight);*/
//camera.Size(100,50);
// parameters.setPictureSize(500,80);
// parameters.set("YCbCr_420_SP",100);
//List<android.support.annotation.Size>picturesize=camera.getParameters().getSupportedPictureSizes();
// List<Camera.Size> picturesize=camera.getParameters().getSupportedPictureSizes();
/*List<Camera.Size>picturesize=camera.getParameters().getSupportedPictureSizes();
List<Camera.Size>previewsize=camera.getParameters().getSupportedPreviewSizes();
List<Integer> previewformats=camera.getParameters().getSupportedPreviewFormats();
List<Integer> previewframerates=camera.getParameters().getSupportedPreviewFrameRates();
//Lise<Integer>
Size size=null;
for (int i=0 ;i<picturesize.size();i++){
size= (Size) picturesize.get(i);
}
for (int i=0;i<previewsize.size();i++){
size= (Size) previewsize.get(i);
}
Integer in=null;
for (int i=0;i<previewformats.size();i++){
in=previewformats.get(i);
}
parameters.setPictureSize(1080,1920);
//camera.setParameters(parameters);
// camera.startPreview();
// int previewWidth;
// int previewHeight;
//List<Camera.Size>previerSizes=camera.getParameters().getPreviewSize();*/
List<Camera.Size> pictureSize = camera.getParameters().getSupportedPictureSizes();
List<Camera.Size> previewsize = camera.getParameters().getSupportedPreviewSizes();
//List<int []> range=parameters.getSupportedPreviewFpsRange();
Camera.Size size;
// size.width=width;
// size.height=height;
for (int i = 0; i < pictureSize.size(); i++) {
size = pictureSize.get(i);
}
for (int i = 0; i < previewsize.size(); i++) {
size = previewsize.get(i);
}
/*for (int j=0;j<range.size();j++){
int [] r=range.get(j);
}*/
//parameters.setPreviewFpsRange(30,30);
parameters.setPictureSize(192,1080);
parameters.setPreviewSize(1920,1080);
//parameters.setPreviewFrameRate(30000);
camera.setDisplayOrientation(0);//角度
camera.setParameters(parameters);
try {
camera.setPreviewDisplay(sv_camera_surfaceview.getHolder());//实时预览
camera.startPreview();
/// /开启预览
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
});
}
public void takephoto(View view) {
camera.setPreviewCallback(new Camera.PreviewCallback() {
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
//byte a=data[0];
//if (data.length<=1) {
//System.arraycopy(data, 0, ImageFormat.NV21, 0, data.length);
FileOutputStream fileoutputstream ;
try {
fileoutputstream = new FileOutputStream(String.format("sdcard/DCIM/camera/" + System.currentTimeMillis() + "12"));
fileoutputstream.write(data);
fileoutputstream.close();
//YuvImage yuvImage=new YuvImage(data,ImageFormat.NV21,1080,1920,null);
//Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
现在每次点击一次拍照都是获得很多张照片怎么只获得点击拍照最近的照片
