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POHow to switch from front and back cameras on a button click?
 

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  1. POHow to switch from front and back cameras on a button click?
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    <p>i want to switch between the front and back cameras on a button click .</p> <p>when any one of the camera's is open , i need to release it and open the other one .</p> <p>could anyone tell me the block of code to switch ?</p> <p>Thank you in advance . . . . </p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"&gt; &lt;Button android:id="@+id/Button01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:background="@drawable/camera_btn"/&gt; &lt;Button android:id="@+id/Button02" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:background="@drawable/front_back_btn"/&gt; &lt;ImageView android:id="@+id/ImageView01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/Button01" android:contentDescription="@string/app_name"&gt; &lt;/ImageView&gt; &lt;com.example.surfacecamera.CameraView android:id="@+id/CameraView01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>THIS IS MY ACTIVITY </p> <p>and main java class is </p> <pre><code>package com.example.surfacecamera; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.app.Activity; import android.os.Bundle; import android.os.Environment; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.ImageView; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Bitmap.CompressFormat; import android.hardware.Camera; public class MainActivity extends Activity implements OnClickListener, Camera.PictureCallback { CameraView cameraView; ImageView imv; Button b2 ; int cameraCount = 0; int camIdx = 0; Camera cam; Camera.CameraInfo cameraInfo = new Camera.CameraInfo(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); setContentView(R.layout.activity_main); Button pictureButton = (Button) this.findViewById(R.id.Button01); Button b2 = (Button) this.findViewById(R.id.Button02); imv = (ImageView) this.findViewById(R.id.ImageView01); cameraView = (CameraView) this.findViewById(R.id.CameraView01); cameraCount = Camera.getNumberOfCameras(); b2.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { } }); pictureButton.setOnClickListener(this); } // From the OnClickListener public void onClick(View v) { cameraView.takePicture(null, null, this); } // From the Camera.PictureCallback public void onPictureTaken(byte[] data, Camera camera) { Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length); imv.setImageBitmap(bmp); String filename = "apicture.jpg"; File pictureFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + filename); try { FileOutputStream pfos = new FileOutputStream(pictureFile); bmp.compress(CompressFormat.JPEG, 75, pfos); pfos.flush(); pfos.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } } </code></pre> <p>and another class</p> <pre><code>package com.example.surfacecamera; import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import android.content.Context; import android.content.res.Configuration; import android.hardware.Camera; import android.hardware.Camera.Parameters; import android.util.AttributeSet; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView; public class CameraView extends SurfaceView implements SurfaceHolder.Callback { SurfaceHolder mHolder; int width; int height; Camera mCamera; public CameraView(Context context, AttributeSet attrs) { super(context,attrs); holderCreation(); } public CameraView(Context context) { super(context); holderCreation(); } public void takePicture(Camera.ShutterCallback shutter, Camera.PictureCallback raw, Camera.PictureCallback jpeg) { mCamera.takePicture(shutter, raw, jpeg); } @SuppressWarnings("deprecation") public void holderCreation() { // Install a SurfaceHolder.Callback so we get notified when the // underlying surface is created and destroyed. mHolder = getHolder(); mHolder.addCallback(this); mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } public void surfaceCreated(SurfaceHolder holder) { // The Surface has been created, acquire the camera and tell it where to draw. mCamera = Camera.open(); Parameters params = mCamera.getParameters(); // If we aren't landscape (the default), tell the camera we want portrait mode if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) { params.set("orientation", "portrait"); // "landscape" // And Rotate the final picture if possible // This works on 2.0 and higher only //params.setRotation(90); // Use reflection to see if it exists and to call it so you can support older versions try { Method rotateSet = Camera.Parameters.class.getMethod( "setRotation", new Class[] { Integer.TYPE } ); Object arguments[] = new Object[] { new Integer(90) }; rotateSet.invoke(params, arguments); } catch (NoSuchMethodException nsme) { // Older Device Log.v("CameraView","No Set Rotation"); } catch (IllegalArgumentException e) { Log.v("CameraView","Exception IllegalArgument"); } catch (IllegalAccessException e) { Log.v("CameraView","Illegal Access Exception"); } catch (InvocationTargetException e) { Log.v("CameraView","Invocation Target Exception"); } } mCamera.setParameters(params); try { mCamera.setPreviewDisplay(holder); } catch (IOException exception) { mCamera.release(); mCamera = null; } } public void surfaceDestroyed(SurfaceHolder holder) { // Surface will be destroyed when we return, so stop the preview. // Because the CameraDevice object is not a shared resource, it's very // important to release it when the activity is paused. mCamera.stopPreview(); mCamera.release(); mCamera = null; } public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { width = w; height = h; // Now that the size is known, set up the camera parameters and begin the preview. Camera.Parameters parameters = mCamera.getParameters(); //parameters.setPreviewSize(w, h); mCamera.setParameters(parameters); mCamera.startPreview(); } } </code></pre>
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    1. USVIGNESH.SRINIVASAGAN
    1. USVIGNESH.SRINIVASAGAN
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    1. COi have gone through many posts but they are device specific and am coding for android tablet .
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      1. POHow to switch from front and back cameras on a button click?
      1. USVIGNESH.SRINIVASAGAN
    2. COhttp://stackoverflow.com/q/6599454/940096 you tried this?
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      1. POHow to switch from front and back cameras on a button click?
      1. USPraveenkumar
    3. COPost the code with what have you tried?
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      1. POHow to switch from front and back cameras on a button click?
      1. USPraveenkumar
 

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