Thank you,
Yes indeed it was a pb of permission. Now I saw some light. However still
I have a pb that concerns the saving
(The picture can not be saved).
In the procedure done () { ....},
the variable url = null and I dont know why
Images.Media.insertImage(getContentResolver(), bm, null, null); is returning
a null value, although I pressed on the button and the camera seems, it
worked normally (it made the normal sound of taking
a picture).
thank you very much guys
On Wednesday, August 29, 2012 8:48:18 AM UTC+1, cpares wrote:
>
> Hello!
>
> Have you requested for permission to use the camera in the manifest?
> Something like this:
> <uses-permission android:name="android.permission.CAMERA" />
> (and maybe <uses-permission android:name="android.permission.AUTOFOCUS" />
> too?)
>
> Good luck!
>
> On Wednesday, August 29, 2012 3:53:52 AM UTC+2, aek wrote:
>>
>>
>> Hi guys,
>>
>> I am trying to learn android hardware programming. an example of camera
>> programming, I took from a book, which is as listed bellow.
>> However unfortunately I am geting an error. "a process stops
>> unexpectdly". the pb I guess as per to what is shown by the log cat, is due
>> to
>> a pb of connecting to the camera service. guys I need your help,
>>
>>
>> thank you!
>>
>> --------------------------------- program
>> package com.example.chapter7_hardware;
>>
>> import android.graphics.Bitmap;
>> import android.graphics.BitmapFactory;
>> import android.graphics.PixelFormat;
>> import android.hardware.Camera;
>> import android.hardware.Camera.PictureCallback;
>> import android.hardware.Camera.ShutterCallback;
>> import android.os.Bundle;
>> import android.provider.MediaStore.Images;
>> import android.app.Activity;
>> import android.content.Intent;
>> import android.util.Log;
>> import android.view.LayoutInflater;
>> import android.view.Menu;
>> import android.view.MenuItem;
>> import android.view.SurfaceHolder;
>> import android.view.SurfaceView;
>> import android.view.View;
>> import android.view.View.OnClickListener;
>> import android.view.ViewGroup.LayoutParams;
>> import android.view.Window;
>> import android.view.WindowManager;
>> import android.widget.Button;
>> import android.widget.Toast;
>> import android.support.v4.app.NavUtils;
>>
>> public class CameraApplication extends Activity implements
>> SurfaceHolder.Callback{
>>
>> private static final String TAG = "cookbook.hardware";
>> private LayoutInflater mInflater = null;
>> Camera mCamera;
>> byte[] tempdata;
>> boolean mPreviewRunning = false;
>> private SurfaceHolder mSurfaceHolder;
>> private SurfaceView mSurfaceView;
>> Button takepicture;
>>
>>
>>
>> @Override
>> public void onCreate(Bundle savedInstanceState) {
>> super.onCreate(savedInstanceState);
>> //
>>
>> getWindow().setFormat(PixelFormat.TRANSLUCENT);
>> requestWindowFeature(Window.FEATURE_NO_TITLE);
>> getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
>> WindowManager.LayoutParams.FLAG_FULLSCREEN);
>>
>> setContentView(R.layout.activity_camera_application);
>>
>> mSurfaceView = (SurfaceView) findViewById(R.id.surface);
>> mSurfaceHolder = mSurfaceView.getHolder();
>> mSurfaceHolder.addCallback(this);
>> mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
>>
>> mInflater = LayoutInflater.from(this);
>>
>> View overView = mInflater.inflate(R.layout.cameraoverlay, null);
>> this.addContentView(overView, new
>> LayoutParams(LayoutParams.FILL_PARENT,
>>
>> LayoutParams.FILL_PARENT));
>>
>> takepicture = (Button) findViewById(R.id.button1);
>>
>> takepicture.setOnClickListener(new View.OnClickListener() {
>>
>> @Override
>> public void onClick(View v) {
>> // TODO Auto-generated method stub
>>
>> mCamera.takePicture(mShutterCallback, mPictureCallback,
>> mjpeg);
>>
>> }
>> });
>>
>> }
>>
>> ShutterCallback mShutterCallback = new ShutterCallback(){
>> @Override
>> public void onShutter(){}
>> };
>>
>>
>> PictureCallback mPictureCallback = new PictureCallback(){
>> @Override
>> public void onPictureTaken(byte[] data, Camera c){}
>> };
>>
>> PictureCallback mjpeg = new PictureCallback(){
>> public void onPictureTaken(byte[] data, Camera c){
>> if (data != null){
>> tempdata = data;
>> done();
>> }
>> }
>>
>>
>> };
>>
>>
>> void done() {
>> Bitmap bm = BitmapFactory.decodeByteArray(tempdata, 0,
>> tempdata.length);
>>
>> String url = Images.Media.insertImage(getContentResolver(), bm,
>> null, null);
>>
>> bm.recycle();
>> Bundle bundle = new Bundle();
>>
>> if (url != null){
>> bundle.putString("url", url);
>> Intent mIntent = new Intent();
>> mIntent.putExtras(bundle);
>>
>> setResult(RESULT_OK, mIntent);
>>
>>
>> } else {
>> Toast.makeText(this, "Picture can not be saved",
>> Toast.LENGTH_LONG).show();
>>
>> }
>>
>> finish();
>>
>>
>> }
>>
>>
>> @Override
>> public boolean onCreateOptionsMenu(Menu menu) {
>> getMenuInflater().inflate(R.menu.activity_camera_application,
>> menu);
>> return true;
>> }
>>
>> @Override
>> public void surfaceChanged(SurfaceHolder holder, int format, int w,
>> int h) {
>> // TODO Auto-generated method stub
>>
>> Log.e(TAG, "surfaceChanged");
>> try{
>> if (mPreviewRunning){
>> mCamera.stopPreview();
>> mPreviewRunning = false;
>> }
>>
>> Camera.Parameters p = mCamera.getParameters();
>> p.setPreviewSize(w, h);
>>
>> mCamera.setParameters(p);
>> mCamera.setPreviewDisplay(holder);
>> mCamera.startPreview();
>> mPreviewRunning = true;
>>
>> } catch (Exception e) {
>> Log.d("", e.toString());
>> }
>>
>>
>> }
>>
>>
>>
>> @Override
>> public void surfaceCreated(SurfaceHolder arg0) {
>> // TODO Auto-generated method stub
>>
>> Log.e(TAG, "surfaceCreated");
>> mCamera = Camera.open();
>>
>> }
>>
>> @Override
>> public void surfaceDestroyed(SurfaceHolder arg0) {
>> // TODO Auto-generated method stub
>>
>> Log.e(TAG, "surfaceDestroyed");
>> mCamera.stopPreview();
>> mPreviewRunning = false;
>> mCamera.release();
>> mCamera = null;
>>
>> }
>>
>>
>> }
>>
>>
>>
>> -------------------------------- log cat
>> 08-29 01:48:43.313: E/prog.hardware(395): surfaceCreated
>> 08-29 01:48:43.345: D/AndroidRuntime(395): Shutting down VM
>> 08-29 01:48:43.345: W/dalvikvm(395): threadid=1: thread exiting with
>> uncaught exception (group=0x4001d800)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): FATAL EXCEPTION: main
>> 08-29 01:48:43.383: E/AndroidRuntime(395): java.lang.RuntimeException:
>> Fail to connect to camera service
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.hardware.Camera.native_setup(Native Method)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.hardware.Camera.<init>(Camera.java:110)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.hardware.Camera.open(Camera.java:90)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> com.example.chapter7_hardware.CameraApplication.surfaceCreated(CameraApplication.java:167)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.SurfaceView.updateWindow(SurfaceView.java:532)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.SurfaceView.dispatchDraw(SurfaceView.java:339)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.ViewGroup.drawChild(ViewGroup.java:1638)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.ViewGroup.drawChild(ViewGroup.java:1638)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.View.draw(View.java:6743)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.widget.FrameLayout.draw(FrameLayout.java:352)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.ViewGroup.drawChild(ViewGroup.java:1640)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.View.draw(View.java:6743)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.widget.FrameLayout.draw(FrameLayout.java:352)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1842)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.ViewRoot.draw(ViewRoot.java:1407)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.ViewRoot.performTraversals(ViewRoot.java:1163)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.os.Handler.dispatchMessage(Handler.java:99)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.os.Looper.loop(Looper.java:123)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> android.app.ActivityThread.main(ActivityThread.java:4627)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> java.lang.reflect.Method.invokeNative(Native Method)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> java.lang.reflect.Method.invoke(Method.java:521)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
>> 08-29 01:48:43.383: E/AndroidRuntime(395): at
>> dalvik.system.NativeStart.main(Native Method)
>>
>>
>>
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