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coding_android
Moderator
Joined: 05 May 2008
Posts: 63
Location: Germany
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 Posted: Tue Jul 08, 2008 5:30 pm Post subject: |
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I have tried this tutorial and it works fine. What should I do to have a "capture" Button below the preview window. I know that it sets directly the content view at the moment . But how could I use that extend SurfaceView called Preview in my Style XML file in order to get the items like buttons or TextViews arranged with the surface view?
I'm really looking forward getting your answers. |
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square
Freshman
Joined: 16 Jul 2008
Posts: 5
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| Posted: Thu Jul 31, 2008 4:00 am Post subject: |
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| coding_android wrote: | I have tried this tutorial and it works fine. What should I do to have a "capture" Button below the preview window. I know that it sets directly the content view at the moment . But how could I use that extend SurfaceView called Preview in my Style XML file in order to get the items like buttons or TextViews arranged with the surface view?
I'm really looking forward getting your answers. |
Hi there,
I think I've found the solution to your question. I'm also a newbie  , so I'm not sure if this is the best solution, but it works for me.
The basic idea of my solution is to create a layout in xml which has in the bottom two buttons, a Capture and a Back button. Set this as the content view of your activity and after this add the mPreview on top of it with the addContentView() method.
The xml layout file for me looks something like this:
| XML: |
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="bottom"
>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
>
<Button
android:id="@+id/capture_button"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:text="Capture"
android:layout_weight="1"
/>
<Button
android:id="@+id/back_button"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:text="Back"
android:layout_weight="1"
/>
</LinearLayout>
</LinearLayout>
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The activity should implement the OnClickListener interface in order to listen to button clicks.
The onCreate method will look something like this:
| Java: |
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
mPreview = new Preview(this);
setContentView(R.layout.main);
addContentView(mPreview, new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
((Button)findViewById(R.id.back_button)).setOnClickListener(this);
((Button)findViewById(R.id.capture_button)).setOnClickListener(this);
}
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And finally in the onClick() method you do the saving or the exit from the program.
| Java: |
public void onClick(View view) {
if (view == findViewById(R.id.back_button)) {
setResult(RESULT_OK);
finish();
}
else if (view == findViewById(R.id.capture_button)) {
mPreview.pause();
takePicture();
mPreview.resume();
}
}
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Hope it helps.
Regards,
square |
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bavarol
Experienced Developer
Joined: 10 Dec 2007
Posts: 52
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| Posted: Mon Aug 11, 2008 12:53 pm Post subject: |
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Hi,
can anybody paste his code?
I can capture and save an image onto sd card but I don't know why, the next run I get a null pointer because the last saved image are not on sd card or has a size = 0.
I have tried with .png and jpg
I post my code
| Java: | void picture(){
int i = 0;
CameraDevice camera = CameraDevice.open();
if (camera != null) {
Log.i("MyLog", "inside the camera");
CameraDevice.CaptureParams param = new CameraDevice.CaptureParams();
param.type = 1; // preview
param.srcWidth = 1280;
param.srcHeight = 960;
param.leftPixel = 0;
param.topPixel = 0;
param.outputWidth = 320;
param.outputHeight = 240;
param.dataFormat = 2; // RGB_565
// Capture of Params
camera.setCaptureParams(param);
Bitmap myPic = Bitmap.createBitmap(320, 240, false);
Canvas canvas = new Canvas(myPic);
String picture_path=null;
try {
// SD-Card
File file;
do {
picture_path="/sdcard/dsc" + i++ + ".jpg";
file = new File(picture_path);
} while (file.exists());
//==================
BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(picture_path));
camera.capture(canvas);
myPic.compress(CompressFormat.PNG, 100, stream);
stream.flush();
stream.close();
}catch(Exception e) { Log.e("CAMERAPREVIEW2:picture()...Exception", e.toString()); }
// Release the CameraDevice and Saving of the picture
if (camera != null) {
camera.close();
savePicture(picture_path);
}
}
}
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The method savePicture put the parameters, which a subactivity uses tu edit the description
| Java: |
void savePicture(String picture_path) {
Intent intent = new Intent(CameraPreview2.this, EditPhoto.class);
/* Create a bundle that will hold will be passed to the
* SubActivity over the Intent */
Bundle bundle = new Bundle();
bundle.putString(TourGuide.DESCRIPTION, "");
bundle.putString(TourGuide.PICTURE_PATH, picture_path);
bundle.putInteger(TourGuide.LATITUDE, latitude);
bundle.putInteger(TourGuide.LONGITUDE, longitude);
bundle.putLong(TourGuide._ID, _id);
intent.putExtras(bundle);
Log.i("CAMERAPREVIEW2:savePicture()",
"picture_path: "+picture_path+
"latitude: "+ latitude+
"longitude: "+ longitude+
"_id: "+_id);
startSubActivity(intent, CREATE_CODE);
} |
What am I doing wrong?
Why dissapears the last image?
I have tried to decode de Bitmap with BitmapFactory.decode(picture_path) and with a BitmapFactory.decodeStream(inputStream) with the proper callings but it dissapears the last image or it will be reset .
Thx in advance
p.s. My SDK is m3rc22a |
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sm12
Freshman
Joined: 13 Nov 2008
Posts: 3
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| Posted: Thu Nov 13, 2008 4:52 am Post subject: |
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Is this topic still active?
I'm desparately trying to finish this tutorial, but so far unlucky.
The problem is with compatibility - I'm using latest version of SDK (1.0). Since lots of thing have changed the code provided does not work anymore.
I'm strugling at method, where we need to set parameters.
CameraDevice, CameraDevice.Params, and many other classes were removed and consequently methods have changed.
Could you please update this tutorial or refer to other similar one.
Thank you. |
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