Android ¿Cómo guardar las imágenes de la cámara en la base de datos y mostrar otra actividad en la vista de lista?

Question

estoy usando la cámara para tomar fotos y quiero almacenar en la base de datos (SQLite). Las fotos almacenadas tienen que mostrarse en la otra actividad con una vista de lista como esta list view images y this iam usando este código tomar foto pero cómo almacenar la foto en la base de datos y mostrar en otra actividad cualquier idea por favor ayuda .....

gracias ....

este es el código para tomar fotos

public class PhotoActivity extends Activity { 
    private static final int CAMERA_REQUEST = 1888; 
    public ImageView imageView; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.photoactivity); 

     this.imageView = (ImageView)this.findViewById(R.id.imageView1);   

     Button B = (Button) this.findViewById(R.id.camera); 
     B.setOnClickListener(new View.OnClickListener() { 
      public void onClick(View v) { 
       Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
       startActivityForResult(cameraIntent, CAMERA_REQUEST); 
      } 
     }); 
    }  
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     if (requestCode == CAMERA_REQUEST) { 
      Bitmap photo = (Bitmap) data.getExtras().get("data"); 
      imageView.setImageBitmap(photo);     

     }  
    } 
} 

Answer 1

Crear base de datos como la clase de ayuda this ..

en la captura de la imagen, insertar la imagen por la transformación en bytes:

Imagehelper help=new Imagehelper(this); 

    if (requestCode == CAMERA_REQUEST) { 
         Bitmap photo = (Bitmap) data.getExtras().get("data"); 
         imageView.setImageBitmap(photo); 
         ByteArrayOutputStream stream = new ByteArrayOutputStream(); 
         photo.compress(Bitmap.CompressFormat.PNG, 100, stream); 
         byte[] byteArray = stream.toByteArray(); 

         help.insert(byteArray); 
    } 

Para recuperar formar la base de datos:

Imagehelper help=new Imagehelper(this); 

     Cursor c= help.getAll(); 
     int i=0; 
     if(c.getCount()>0) 
     { 
      Bitmap[] array=new Bitmap[c.getCount()]; 
      c.moveToFirst(); 
      while(c.isAfterLast()==false) 
      { 

       byte[] bytes=c.getBlob(c.getColumnIndex("imageblob")); 

      array[i]=BitmapFactory.decodeByteArray(bytes, 0, 0); 
      c.moveToNext(); 
      i++; 
      } 
      Log.e("Bitmap length",""+array.length); 
     } 

pasar esta Matriz de mapa de bits a ListView

Answer 2

no estoy convencido de guardar el mapa de bits en sí en una base de datos SQLite. Pero es posible cuando se usa Blob. Un blob necesita un byte [].

Puede obtener una matriz de bytes guardando el mapa de bits (con compresión) y leyendo nuevamente el archivo. http://developer.android.com/reference/android/graphics/Bitmap.html

Bitmap b; 
File f = new File (...); 
FileOutputStream fs = new FileOutputStream (f); 
b.compress(JPEG, 85, fs); 
fs.close(); 
// Reread the file f into a byte [] 

o

Bitmap b; 
ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
b.compress(JPEG, 85, baos); 
baos.close(); 
byte[] blob = baos.toByteArray(); 
b.compress(JPEG, 85, baos) 

O puede serializar el mapa de bits en ByteArrayOutputStream (usando ObjectOutputStream)

Bitmap b; 
ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
ObjectOutputStream oos = new ObjectOutputStream (baos); 
oos.write (b); 
oos.close(); 
baos.close(); 
byte[] blob = baos.toByteArray(); 

Sin embargo, probablemente tiene sentido para guardar el mapa de bits como archivos (JPG o PNG) porque pueden aumentar de tamaño. La base de datos solo mantendrá la información de ruta sobre esa imagen.

Answer 3

Hola amigos que tengo t La solución del problema anterior. Aquí publico mi código fuente completo para que otros puedan usar esta solución.

1.Crear una acividad, es decir CameraPictureActivity.

  public class CameraPictureActivity extends Activity { 
       Button addImage; 
       ArrayList<Contact> imageArry = new ArrayList<Contact>(); 
       ContactImageAdapter imageAdapter; 
       private static final int CAMERA_REQUEST = 1; 

       ListView dataList; 
       byte[] imageName; 
       int imageId; 
       Bitmap theImage; 
       DataBaseHandler db; 

       /** Called when the activity is first created. */ 
       @Override 
       public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
        dataList = (ListView) findViewById(R.id.list); 
        /** 
        * create DatabaseHandler object 
        */ 
        db = new DataBaseHandler(this); 
        /** 
        * Reading and getting all records from database 
        */ 
        List<Contact> contacts = db.getAllContacts(); 
        for (Contact cn : contacts) { 
         String log = "ID:" + cn.getID() + " Name: " + cn.getName() 
           + " ,Image: " + cn.getImage(); 

         // Writing Contacts to log 
         Log.d("Result: ", log); 
         // add contacts data in arrayList 
         imageArry.add(cn); 

        } 
        /** 
        * Set Data base Item into listview 
        */ 
        imageAdapter = new ContactImageAdapter(this, R.layout.screen_list, 
          imageArry); 
        dataList.setAdapter(imageAdapter); 

        /** 
        * open dialog for choose camera 
        */ 

        final String[] option = new String[] {"Take from Camera"}; 
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, 
          android.R.layout.select_dialog_item, option); 
        AlertDialog.Builder builder = new AlertDialog.Builder(this); 

        builder.setTitle("Select Option"); 
        builder.setAdapter(adapter, new DialogInterface.OnClickListener() { 

         public void onClick(DialogInterface dialog, int which) { 
          // TODO Auto-generated method stub 
          Log.e("Selected Item", String.valueOf(which)); 
          if (which == 0) { 
           callCamera(); 
          } 


         } 
        }); 
        final AlertDialog dialog = builder.create(); 

        addImage = (Button) findViewById(R.id.btnAdd); 

        addImage.setOnClickListener(new View.OnClickListener() { 
         public void onClick(View v) { 
          dialog.show(); 
         } 
        }); 

       } 

       /** 
       * On activity result 
       */ 
       @Override 
       protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
        if (resultCode != RESULT_OK) 
         return; 

        switch (requestCode) { 
        case CAMERA_REQUEST: 

         Bundle extras = data.getExtras(); 

         if (extras != null) { 
          Bitmap yourImage = extras.getParcelable("data"); 
          // convert bitmap to byte 
          ByteArrayOutputStream stream = new ByteArrayOutputStream(); 
          yourImage.compress(Bitmap.CompressFormat.PNG, 100, stream); 
          byte imageInByte[] = stream.toByteArray(); 

          // Inserting Contacts 
          Log.d("Insert: ", "Inserting .."); 
          db.addContact(new Contact("Android", imageInByte)); 
          Intent i = new Intent(CameraPictureActivity.this, 
            CameraPictureActivity.class); 
          startActivity(i); 
          finish(); 

         } 
         break; 
        } 
       } 

       /** 
       * open camera method 
       */ 
       public void callCamera() 
       { 
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
        startActivityForResult(intent, CAMERA_REQUEST); 
        intent.setType("image/*"); 
        intent.putExtra("crop", "true"); 
        intent.putExtra("aspectX", 0); 
        intent.putExtra("aspectY", 0); 
        intent.putExtra("outputX", 250); 
        intent.putExtra("outputY", 200); 
       } 
       } 

2.Crear clase DataBaseHandler.

   public class DataBaseHandler extends SQLiteOpenHelper 
      { 

      // All Static variables 
      // Database Version 
      private static final int DATABASE_VERSION = 1; 

      // Database Name 
      private static final String DATABASE_NAME = " Camera_imagedb"; 

      // Contacts table name 
      private static final String TABLE_CONTACTS = " Camera_contacts"; 

      // Contacts Table Columns names 
      private static final String KEY_ID = "id"; 
      private static final String KEY_NAME = "name"; 
      private static final String KEY_IMAGE = "image"; 

      public DataBaseHandler(Context context) { 
       super(context, DATABASE_NAME, null, DATABASE_VERSION); 
      } 

      // Creating Tables 
      @Override 
      public void onCreate(SQLiteDatabase db) { 
       String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "(" 
         + KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT," 
         + KEY_IMAGE + " BLOB" + ")"; 
       db.execSQL(CREATE_CONTACTS_TABLE); 
      } 

      // Upgrading database 
      @Override 
      public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
       // Drop older table if existed 
       db.execSQL("DROP TABLE IF EXISTS " + TABLE_CONTACTS); 

       // Create tables again 
       onCreate(db); 
      } 

      /** 
      * All CRUD(Create, Read) Operations 
      */ 

      public// Adding new contact 
      void addContact(Contact contact) { 
       SQLiteDatabase db = this.getWritableDatabase(); 

       ContentValues values = new ContentValues(); 
       values.put(KEY_NAME, contact._name); // Contact Name 
       values.put(KEY_IMAGE, contact._image); // Contact Phone 

       // Inserting Row 
       db.insert(TABLE_CONTACTS, null, values); 
       db.close(); // Closing database connection 
      } 

      // Getting single contact 
      Contact getContact(int id) { 
       SQLiteDatabase db = this.getReadableDatabase(); 

       Cursor cursor = db.query(TABLE_CONTACTS, new String[] { KEY_ID, 
         KEY_NAME, KEY_IMAGE }, KEY_ID + "=?", 
         new String[] { String.valueOf(id) }, null, null, null, null); 
       if (cursor != null) 
        cursor.moveToFirst(); 

       Contact contact = new Contact(Integer.parseInt(cursor.getString(0)), 
         cursor.getString(1), cursor.getBlob(1)); 

       // return contact 
       return contact; 

      } 

      // Getting All Contacts 
      public List<Contact> getAllContacts() { 
       List<Contact> contactList = new ArrayList<Contact>(); 
       // Select All Query 
       String selectQuery = "SELECT * FROM contacts ORDER BY name"; 

       SQLiteDatabase db = this.getWritableDatabase(); 
       Cursor cursor = db.rawQuery(selectQuery, null); 
       // looping through all rows and adding to list 
       if (cursor.moveToFirst()) { 
        do { 
         Contact contact = new Contact(); 
         contact.setID(Integer.parseInt(cursor.getString(0))); 
         contact.setName(cursor.getString(1)); 
         contact.setImage(cursor.getBlob(2)); 
         // Adding contact to list 
         contactList.add(contact); 
        } while (cursor.moveToNext()); 
       } 
       // close inserting data from database 
       db.close(); 
       // return contact list 
       return contactList; 
      } 
      } 

3.Create otra clase de contacto

 public class Contact 
     { 

      // private variables 
      int _id; 
      String _name; 
      byte[] _image; 

      // Empty constructor 
      public Contact() { 

      } 

      // constructor 
      public Contact(int keyId, String name, byte[] image) { 
       this._id = keyId; 
       this._name = name; 
       this._image = image; 

      } 
      public Contact(String name, byte[] image) { 
       this._name = name; 
       this._image = image; 

      } 
      public Contact(int keyId) { 
       this._id = keyId; 

      } 

      // getting ID 
      public int getID() { 
       return this._id; 
      } 

      // setting id 
      public void setID(int keyId) { 
       this._id = keyId; 
      } 

      // getting name 
      public String getName() { 
       return this._name; 
      } 

      // setting name 
      public void setName(String name) { 
       this._name = name; 
      } 

      // getting phone number 
      public byte[] getImage() { 
       return this._image; 
      } 

      // setting phone number 
      public void setImage(byte[] image) { 
       this._image = image; 
      } 
     } 

4.Cree un adaptador es decir ContactImageAdapter

 public class ContactImageAdapter extends ArrayAdapter<Contact>{ 
      Context context; 
       int layoutResourceId; 
       // BcardImage data[] = null; 
       ArrayList<Contact> data=new ArrayList<Contact>(); 
       public ContactImageAdapter(Context context, int layoutResourceId, ArrayList<Contact> data) { 
        super(context, layoutResourceId, data); 
        this.layoutResourceId = layoutResourceId; 
        this.context = context; 
        this.data = data; 
       } 

       @Override 
       public View getView(int position, View convertView, ViewGroup parent) { 
        View row = convertView; 
        ImageHolder holder = null; 

        if(row == null) 
        { 
         LayoutInflater inflater = ((Activity)context).getLayoutInflater(); 
         row = inflater.inflate(layoutResourceId, parent, false); 

         holder = new ImageHolder(); 
         holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle); 
         holder.imgIcon = (ImageView)row.findViewById(R.id.imgIcon); 
         row.setTag(holder); 
        } 
        else 
        { 
         holder = (ImageHolder)row.getTag(); 
        } 

        Contact picture = data.get(position); 
        holder.txtTitle.setText(picture._name); 
        //convert byte to bitmap take from contact class 

        byte[] outImage=picture._image; 
        ByteArrayInputStream imageStream = new ByteArrayInputStream(outImage); 
        Bitmap theImage = BitmapFactory.decodeStream(imageStream); 
        holder.imgIcon.setImageBitmap(theImage); 
        return row; 

       } 

       static class ImageHolder 
       { 
        ImageView imgIcon; 
        TextView txtTitle; 
       } 
      } 

crear 5.Finalmente el xml archivos principal y screen_list.

5,1 main.xml

<?xml version="1.0" encoding="utf-8"?> 
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:background="#ffffff" 
     android:orientation="vertical" > 

     <Button 
      android:id="@+id/btnAdd" 
      android:layout_width="fill_parent" 
      android:layout_height="60dp" 
      android:text="Add Image" /> 

     <ListView 
      android:id="@+id/list" 
      android:layout_width="fill_parent" 
      android:layout_height="0dp" 
      android:layout_weight="0.55" 
      android:cacheColorHint="#00000000" > 
     </ListView> 

    </LinearLayout> 

5.2 screen_list.xml

<?xml version="1.0" encoding="utf-8"?> 
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="horizontal" 
    android:padding="10dp" > 

    <ImageView 
     android:id="@+id/imgIcon" 
     android:layout_width="200dp" 
     android:layout_height="200dp" 
     android:scaleType="fitXY" 
     android:gravity="center_vertical" /> 

    <TextView 
     android:id="@+id/txtTitle" 
     android:layout_width="80dp" 
     android:layout_height="wrap_content" 
     android:gravity="center_vertical" 
     android:textSize="14dp" 
     android:text="@string/hello" 
     android:textColor="#000000" 
     android:layout_marginLeft="7dp" /> 

</LinearLayout> 

6.Salida como esta.