如何捕获图像并将其保存在sd卡中
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大家好，我正在使用以下代码从我的应用程序访问摄像头。
该应用程序能够访问相机，我还添加了一个按钮，其onclicklistener添加了以下代码行：-
camera.takePicture(mShutterCallback, mPictureCallbackRaw, mPictureCallbackJpeg);
SurfaceHolder holder;
SurfaceView surface;
Camera camera;
Boolean isPreviewRunning, fromOnResume;
//Preview mpreview;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
isPreviewRunning = false;
fromOnResume = false;
// requestWindowFeature(Window.FEATURE_NO_TITLE);
surface = (SurfaceView)findViewById(R.id.surface);
holder = surface.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
Button btn = (Button)findViewById(R.id.click);
btn.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
camera.takePicture(mShutterCallback, mPictureCallbackRaw, mPictureCallbackJpeg);
//onCreate(null);
}
});
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
/* if (isPreviewRunning) {
camera.stopPreview();
} */
Camera.Parameters parameters = camera.getParameters();
List<Size> sizes = parameters.getSupportedPreviewSizes();
Size size = sizes.get(0);
parameters.setPreviewSize(size.width, size.height);
camera.setParameters(parameters);
camera.startPreview();
isPreviewRunning=true;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera = Camera.open();
try {
camera.setPreviewDisplay(holder);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
camera.stopPreview();
camera.release();
camera=null;
}
Camera.PictureCallback mPictureCallbackRaw = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera c) {
Log.e(getClass().getSimpleName(), \"PICTURE CALLBACK RAW: \" + data);
camera.startPreview();
}
};
Camera.PictureCallback mPictureCallbackJpeg= new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera c) {
Log.e(getClass().getSimpleName(), \"PICTURE CALLBACK JPEG: data.length = \" + data);
camera.startPreview();
}
};
Camera.ShutterCallback mShutterCallback = new Camera.ShutterCallback() {
public void onShutter() {
Log.e(getClass().getSimpleName(), \"SHUTTER CALLBACK\");
}
};
/*
* protected void onRestoreInstanceState(Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
}
protected void onResume()
{
Log.e(getClass().getSimpleName(), \"onResume\");
camera.open();
fromOnResume=true;
super.onResume();
}
protected void onSaveInstanceState(Bundle outState)
{
super.onSaveInstanceState(outState);
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
camera.release();
super.onPause();
}
protected void onStop()
{
Log.e(getClass().getSimpleName(), \"onStop\");
super.onStop();
}*/
没有找到相关结果
已邀请:
2 个回复
扇献隙
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.capture); Button capture = (Button) findViewById(R.id.capture_button); capture.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // We use the stock camera app to take a photo Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); intent.putExtra(MediaStore.EXTRA_OUTPUT, getImageUri()); startActivityForResult(intent, TAKE_PHOTO_CODE); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK) { Uri imagePath = getImageUri(); doSomething(); } } /** * Get the uri of the captured file * @return A Uri which path is the path of an image file, stored on the dcim folder */ private Uri getImageUri() { // Store image in dcim File file = new File(Environment.getExternalStorageDirectory() + \"/DCIM\", CAPTURE_TITLE); Uri imgUri = Uri.fromFile(file); return imgUri; }挂帘妈乡