Thread: Android Camera app

I am working on an android application that will need to take and store pictures. I'm familiar with java but not with the Android APIs. I tried to start by just including the functions for taking and saving an image using the information on the android developers page(Camera | Android Developers) however when I attempt to run the program it says it had to close. Install is successful though. My activity, preview class and manifest.xml are below. I do not want to use an intent because I will be displaying images and buttons over the preview and be adding buttons to interact wiht the camera. I would really appreciate it if anyone could point out where the problem is or anything like that.

Activity:

import android.hardware.*;
import android.os.*;
import android.app.*;
import android.widget.*;
import android.view.*;
import android.net.*;
import java.io.*;
import android.util.*;
import java.text.*;
import java.util.*;
import android.hardware.Camera.*;
public class ConverterActivity extends Activity 
{
    private Camera mCamera;
    private CameraPreview mPreview;
private PictureCallback mPicture = new PictureCallback() {
private String TAG;
@Override
public void onPictureTaken(byte[] data, Camera camera) {
File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
if (pictureFile == null){
// Log.d(TAG, "Error creating media file, check storage permissions: " +
//  e.getMessage());
return;
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
} catch (FileNotFoundException e) {
Log.d(TAG, "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d(TAG, "Error accessing file: " + e.getMessage());
}
}
};
 
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
 
// Add a listener to the Capture button
Button captureButton = (Button) findViewById(R.id.button_capture);
captureButton.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
// get an image from the camera
mCamera.takePicture(null, null, mPicture);
}
}
);
        // Create an instance of Camera
        mCamera = Camera.open(this.getBackCamera());
        // Create our Preview view and set it as the content of our activity.
        mPreview = new CameraPreview(this, mCamera);
        FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
        preview.addView(mPreview);
}
@Override
    protected void onPause()
    {
        super.onPause();
        releaseCamera();              // release the camera immediately on pause event
    }
    private void releaseCamera(){
        if (mCamera != null){
            mCamera.release();        // release the camera for other applications
            mCamera = null;
        }
    }
public static final int MEDIA_TYPE_IMAGE = 1;
public static final int MEDIA_TYPE_VIDEO = 2;
/** Create a file Uri for saving an image or video */
private static Uri getOutputMediaFileUri(int type){
return Uri.fromFile(getOutputMediaFile(type));
}
/** Create a File for saving an image or video */
private static File getOutputMediaFile(int type){
// To be safe, you should check that the SDCard is mounted
// using Environment.getExternalStorageState() before doing this.
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "MyCameraApp");
// This location works best if you want the created images to be shared
// between applications and persist after your app has been uninstalled.
// Create the storage directory if it does not exist
if (! mediaStorageDir.exists()){
if (! mediaStorageDir.mkdirs()){
Log.d("MyCameraApp", "failed to create directory");
return null;
}
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
if (type == MEDIA_TYPE_IMAGE){
mediaFile = new File(mediaStorageDir.getPath() + File.separator +
"IMG_"+ timeStamp + ".jpg");
} else if(type == MEDIA_TYPE_VIDEO) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator +
"VID_"+ timeStamp + ".mp4");
} else {
return null;
}
return mediaFile;
}
public int getBackCamera()
{
int numCameras = Camera.getNumberOfCameras();
CameraInfo cInfo = new CameraInfo();
for (int i = 0; i < numCameras; i++)
{
Camera.getCameraInfo(i, cInfo);
if (cInfo.facing == CameraInfo.CAMERA_FACING_BACK)
{
return i;
}
}
return -1;
}
}

Camera Preview:

import android.view.*;
import android.hardware.Camera.*;
import android.hardware.*; 
import android.content.*;
import java.io.*;  
 
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
    private SurfaceHolder mHolder;
    private Camera mCamera;
 
    public CameraPreview(Context context, Camera camera) {
        super(context);
        mCamera = camera;
 
        // Install a SurfaceHolder.Callback so we get notified when the
        // underlying surface is created and destroyed.
        mHolder = getHolder();
        mHolder.addCallback(this);
        // deprecated setting, but required on Android versions prior to 3.0
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }
 
    public void surfaceCreated(SurfaceHolder holder) {
        // The Surface has been created, now tell the camera where to draw the preview.
        try {
            mCamera.setPreviewDisplay(holder);
            mCamera.startPreview();
        } catch (IOException e) {
            Log.d(TAG, "Error setting camera preview: " + e.getMessage());
        }
    }
 
    public void surfaceDestroyed(SurfaceHolder holder) {
        // empty. Take care of releasing the Camera preview in your activity.
    }
 
    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
        // If your preview can change or rotate, take care of those events here.
        // Make sure to stop the preview before resizing or reformatting it.
 
        if (mHolder.getSurface() == null){
          // preview surface does not exist
          return;
        }
 
        // stop preview before making changes
        try {
            mCamera.stopPreview();
        } catch (Exception e){
          // ignore: tried to stop a non-existent preview
        }
 
        // set preview size and make any resize, rotate or
        // reformatting changes here
 
        // start preview with new settings
        try {
            mCamera.setPreviewDisplay(mHolder);
            mCamera.startPreview();
 
        } catch (Exception e){
            Log.d(TAG, "Error starting camera preview: " + e.getMessage());
        }
    }
}

Manifest.xml

HTML Code:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="your.Converter"
          android:versionCode="1"
          android:versionName="1.0" >
     <uses-sdk android:minSdkVersion="10" />
   <uses-permission android:name="android.permissions.CAMERA" />
   <uses-feature android:name="android.hardware.camera" />
   <uses-feature android:name="android.hardware.camera.autofocus" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
   <application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
     <activity
      android:name=".ConverterActivity"
      android:label="@string/app_name"
      android:screenOrientation="landscape">
                <intent-filter>
         <action android:name="android.intent.action.MAIN" />
         <category android:name="android.intent.category.LAUNCHER" />
       </intent-filter>
     </activity>
   </application>
   </manifest> 

I found the problem. I said android.permissions.CAMERA I should have said android.permission.CAMERA.