Develop Reference

Getting Youtube videos using RecyclerView and cardView with Firebase in Android studio

I have been working on an android project in which I have used YouTube API and Firebase as a database, I also used recyclerView in it but my videos from Firebase database are not showing in the application, I have implemented it correctly I guess but there is something wrong with it, please help.
I am using Android Studio
YouTube Firebase Adapter java class:
#Override
protected void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.youtube_videos);
YDatabaseReference = FirebaseDatabase.getInstance().getReference().child("youT");
YouRecycler = (RecyclerView)findViewById(R.id.Youtube_recycler);
}
#Override
public void onStart() {
super.onStart();
FirebaseRecyclerAdapter<post2youtube, YoutubeViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<post2youtube, YoutubeViewHolder>(
post2youtube.class,
R.layout.youtube_videos_card,
YoutubeViewHolder.class,
YDatabaseReference
) {
#Override
protected void populateViewHolder(YoutubeViewHolder viewHolder, post2youtube model, int position) {
viewHolder.setYoutube(model.getYoutubing());
}
};
YouRecycler.setAdapter(firebaseRecyclerAdapter);
}
public static class YoutubeViewHolder extends RecyclerViewPager.ViewHolder {
View yView;
public YoutubeViewHolder(View itemView) {
super(itemView);
yView = itemView;
}
public void setYoutube(final String youtubing){
final YouTubePlayerView youPlay = (YouTubePlayerView) yView.findViewById(R.id.youtuber);
youPlay.initialize("SOME KEY",
new YouTubePlayer.OnInitializedListener() {
#Override
public void onInitializationSuccess(YouTubePlayer.Provider provider,
YouTubePlayer youTubePlayer, boolean b) {
youTubePlayer.cueVideo(youtubing);
}
#Override
public void onInitializationFailure(YouTubePlayer.Provider provider,
YouTubeInitializationResult youTubeInitializationResult) {
}
});
}
Getter and setters class :
public class post2youtube {
private String youtubing;
public post2youtube(){
}
public post2youtube(String youtubing) {
this.youtubing = youtubing;
}
public String getYoutubing() {
return youtubing;
}
public void setYoutubing(String youtubing) {
this.youtubing = youtubing;
}
}
RecyclerView xml file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/Youtube_recycler"/>
</LinearLayout>
CardView xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.youtube.player.YouTubePlayerView
android:id="#+id/youtuber"
android:layout_width="match_parent"
android:layout_height="200dp" />
</LinearLayout>
</android.support.v7.widget.CardView>

Zbar add floating View

Ok, so, i want to make something like this:
http://postimg.org/image/qs3okxitf/
Now, im using zbarscannerview like this:
public class BarKodScreen extends AppCompatActivity implements ZBarScannerView.ResultHandler {
private ZBarScannerView mView;
private BarcodeFormat barcodeFormatEAN13, barcodeFormatEAN8;
private List<BarcodeFormat> listaZaFormat = new ArrayList<BarcodeFormat>();
private ImageView img;
private LinearLayout lejout;
private View kamera;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_barkod);
mView = new ZBarScannerView(this);
lejout = (LinearLayout) findViewById(R.id.cameraPreview);
img = (ImageView) findViewById(R.id.cameraImageView);
kamera = (View) findViewById(R.id.zaKameru);
kamera = mView;
lejout.addView(kamera);
lejout.addView(kamera);
lejout.removeView(img);
lejout.addView(img);
barcodeFormatEAN13 = BarcodeFormat.EAN13;
barcodeFormatEAN8 = BarcodeFormat.EAN8;
listaZaFormat.add(barcodeFormatEAN13);
listaZaFormat.add(barcodeFormatEAN8);
mView.setFormats(listaZaFormat);
}
#Override
public void onResume() {
super.onResume();
mView.setResultHandler(this); // Register ourselves as a handler for scan results.
mView.startCamera(); // Start camera on resume
}
#Override
public void onPause() {
super.onPause();
mView.stopCamera(); // Stop camera on pause
}
#Override
public void handleResult(Result rawResult) {
// Do something with the result here
Log.v("GetCOntent", rawResult.getContents()); // Prints scan results
barKodZahtev(rawResult.getContents());
}
}
and my xml is:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/cameraPreview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<View
android:id="#+id/zaKameru"
android:layout_width="match_parent"
android:layout_height="150dp"/>
<ImageView
android:id="#+id/cameraImageView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:alpha="0.6"
android:src="#drawable/share" />
</LinearLayout>
What I dont understand is how to add the image(text from the screenshot) as a child view for my zbarscannerView.

Check out their rapository on github, they have something there.

TextureView in a Fragment never calls onSurfaceTextureAvailable

I've seen lots of examples using TextureView in a main Activity but I'm trying to put it into a Fragment.
I've created the simplest example possible and its onCreateView is being called, onActivityCreated as well but onSurfaceTextureAvailable isn't being called after passing back the TextureView.
What am I missing ?
Thanks
G
public class FullscreenActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fullscreen);
}
}
public class TextureViewFragment extends Fragment
implements TextureView.SurfaceTextureListener {
private TextureView mTextureView;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
mTextureView = new TextureView(getActivity());
mTextureView.setSurfaceTextureListener(this);
mTextureView.setOpaque(false);
return mTextureView;
}
#Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
}
#Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
// TODO Auto-generated method stub
return false;
}
#Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width,
int height) {
// TODO Auto-generated method stub
}
#Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
// TODO Auto-generated method stub
}
}
activity_fullscreen.xml:
<FrameLayout 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:background="#0099cc"
tools:context=".FullscreenActivity" >
<fragment class="com.example.test.TextureViewFragment"
android:id="#+id/graphTextureView"
android:layout_width="0px" android:layout_height="match_parent" />
</FrameLayout>

This is because the TextureView must have a nonzero size and be visible. Based on the comment, the layout_width was set to 0px. Change that to a nonzero value.
(Old question but posting answer for posterity)

You should add 'android:hardwareAccelerated=true' to your AndroidManifest.xml.
TextureView needs hardware acceleration.

Your TextureView should be in a layout xml file. Instead of using new to instantiate it you should get it using something like this:
View view = inflater.inflate(R.layout.layout_video, container, false);
mTextureView = (TextureView) view.findViewById(R.id.video_texture_view);
Then in your layout_video.xml file you need a TextureView with id video_texture_view

SurfaceView and overlaying View with Fragments in Android

In my application I was using a custom SurfaceView to retrieve a picture from the camera, and then a custom View for printing it on screen after drawing additional features over it using a canvas. These two classes were created and added to the layout in the activity:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
myView = new MyView(this);
mySurfaceView = new MySurfaceView(this, myView);
setContentView(mySurfaceView);
addContentView(myView, new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
}
and then myView was called back from mySurfaceView using the
surfaceChanged and surfaceCreated methods:
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Camera.Parameters parameters = mCamera.getParameters();
...
mCamera.setParameters(parameters);
mCamera.startPreview();
}
public void surfaceCreated(SurfaceHolder holder) {
mCamera = Camera.open();
try{
mCamera.setPreviewDisplay(holder);
mCamera.setPreviewCallback(new Camera.PreviewCallback() {
public void onPreviewFrame(byte[] data, Camera camera) {
...
System.arraycopy(data, 0, myView.cameraData, 0, data.length);
myView.invalidate();
}
});
}catch(Exception e){
mCamera.release();
mCamera = null;
}
}
Everything was working fine... until I decided to put all of the above in a Fragment in order to use two different views in the same app. Following a tutorial, I put the two classes in the Fragment instead of the Activity:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
myView = new MyView(this);
mySurfaceView = new MySurfaceView(this, myView);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mySurfaceView = (MySurfaceView)inflater.inflate(R.layout.camera_view, null);
return mySurfaceView;
}
while the XML layout is:
camera_fragment (I'm not concerning about the other fragment, yet):
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<!-- "Fragment A" -->
<fragment
android:id="#+id/camera_frag"
android:name="com.example.mypackage.CameraFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
camera_view:
<?xml version="1.0" encoding="utf-8"?>
<view xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.example.mypackage.MySurfaceView" >
</view>
With the fragment version of the code I can see the SurfaceView with ease, but I don't seem able to print on screen the features that should be drawn by the View. No error code is reported, but the program seems to never enter the setPreviewCallback, and then the onPreviewFrame method. I don't know if it is because of how I instantiate the classes, or how I declare the layout, or both.

Combine Canvas and layout (Android)

My question about Android UI.
When we work with XML-layout we write (for example)
setContentView(R.layout.main);
And when we work with 2d-graphics we write
Draw2D d = new Draw2D(this);
setContentView(d);
So what if I want to use both? I need to use layout-xml and a part of a screen is fir painting (Canvas). I read about surfaceView, but what about simple using Canvas?

You can actually inflate your layout from an XML file and then retrieve any view to draw on it. SurfaceView are especially convenient for drawing.
You can find below an example:
main.xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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" >
<SurfaceView
android:id="#+id/surface"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
TestActivity.java:
public class TestActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
SurfaceView surface = (SurfaceView) findViewById(R.id.surface);
surface.getHolder().addCallback(new Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
// Do some drawing when surface is ready
Canvas canvas = holder.lockCanvas();
canvas.drawColor(Color.RED);
holder.unlockCanvasAndPost(canvas);
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
});
}
}