如何在数据库中存储图像android [复制]

参见英文答案 > How to save images into Database3个
我是android的新手,我正在创建一个联系人管理器.我已经研究了如何将EditText字段中的值存储到数据库中,但我不知道如何在数据库中存储图像.我想知道是否有人可以帮助我.

package awad865.project.ContactManager1;



import java.io.FileNotFoundException;
import java.io.InputStream;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.database.SQLException;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Spinner;


public class AddContact extends Activity {
    //declare private fields
    private EditText firstName;
    private EditText lastName;
    private EditText number;
    private EditText address;
    private EditText date;
    private EditText email;
    private Spinner numberSpinner;
    private Spinner emailSpinner;
    private Spinner addressSpinner;
    private Spinner dateSpinner;
    private DatabaseHandler databaseHandler;
    private ImageButton addPic;
    private final int IMAGE_SELECTION =1;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_contact);
        //code that enables the title on the action bar
        getActionBar().setDisplayShowTitleEnabled(true);
        getActionBar().setDisplayHomeAsUpEnabled(true);
        databaseHandler = new DatabaseHandler(this);

        //intialise private fields
        firstName = (EditText)findViewById(R.id.edit_first_name);
        lastName = (EditText)findViewById(R.id.edit_last_name);
        number = (EditText)findViewById(R.id.edit_number);
        address = (EditText)findViewById(R.id.edit_address);
        date = (EditText)findViewById(R.id.edit_date);
        email =(EditText)findViewById(R.id.edit_email);


        //Spinner for the phone number field
        numberSpinner = (Spinner) findViewById(R.id.contact_number_spinner);
        // Create an ArrayAdapter using the string array and a default spinner layout
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,R.array.number_array,android.R.layout.simple_spinner_item);
        // Specify the layout to use when the list of choices appears
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        // Apply the adapter to the spinner
        numberSpinner.setAdapter(adapter);


        //Spinner for the email address field
        emailSpinner = (Spinner) findViewById(R.id.contact_email_spinner);
        adapter = ArrayAdapter.createFromResource(this,R.array.email_array,android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        emailSpinner.setAdapter(adapter);

        //Spinner for address field
        addressSpinner = (Spinner) findViewById(R.id.contact_address_spinner);
        adapter= ArrayAdapter.createFromResource(this,R.array.address_array,android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        addressSpinner.setAdapter(adapter);

        //Spinner for date
        dateSpinner = (Spinner) findViewById(R.id.contact_date_spinner);
        adapter=ArrayAdapter.createFromResource(this,R.array.date_array,android.R.layout.simple_spinner_dropdown_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        dateSpinner.setAdapter(adapter);


        addPic = (ImageButton) findViewById(R.id.addImage);
        Bitmap bm = BitmapFactory.decodeResource(getResources(),R.drawable.contacts_photo);
        addPic.setImageBitmap(bm);

        addPic.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                Intent imageIntent = new Intent(Intent.ACTION_PICK);
                imageIntent.setType("image/*");
                startActivityForResult(imageIntent,IMAGE_SELECTION);

            }
        });
    }

    protected void onActivityResult(int requestCode,int resultCode,Intent imageReturnedIntent){
        super.onActivityResult(requestCode,resultCode,imageReturnedIntent);

        switch(requestCode){
        case IMAGE_SELECTION:
            if(resultCode == RESULT_OK){
                try{
                    BitmapFactory.Options options = new BitmapFactory.Options();
                    options.inScaled = true;
                    final Uri imageURI = imageReturnedIntent.getData();
                    final InputStream inStr = getContentResolver().openInputStream(imageURI);
                    final Bitmap selectImg = BitmapFactory.decodeStream(inStr,null,options);
                    addPic.setImageBitmap(selectImg);
                }catch(FileNotFoundException ex){
                    Log.e("File not found","Selected image was not found",ex);
                }
            }
        }

    }




    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.add_contact,menu);
        return true;
    }

    public boolean onOptionsItemSelected(MenuItem item){

        switch(item.getItemId()){
        //if the save button is pressed,then all the information is retrieved from the EditText fields
        //and stored in the private fields and then a new contact object is created and added to the 
        //database
        case R.id.action_save:
                    //WANT to save the image here
            BitmapDrawable bmd = ((BitmapDrawable) addPic.getDrawable());
            Bitmap photo = bmd.getBitmap();
            Contact contact = new Contact(firstName.getText().toString(),lastName.getText().toString(),number.getText().toString(),numberSpinner.getSelectedItem().toString(),email.getText().toString(),emailSpinner.getSelectedItem().toString(),date.getText().toString(),dateSpinner.getSelectedItem().toString(),address.getText().toString(),addressSpinner.getSelectedItem().toString(),"false");
            //add to database

            try {
                databaseHandler.openDataBase();
                databaseHandler.addContact(contact);
                databaseHandler.close();
            } catch (SQLException sqle) {
                throw sqle;
            }
            //go back to list of contacts
            Intent intentMain = new Intent(getApplicationContext(),MainActivity.class);
            intentMain.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            startActivity(intentMain);
            return true;

            //if the cancel button is pressed on the action bar then the user is navigate to MainActivity
        case R.id.action_cancel:
            Intent intentCancel = new Intent(this,MainActivity.class);
            intentCancel.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            startActivity(intentCancel);
            return true;
            //if the up button is pressed,then the user is taken back to the MainActivity
        case android.R.id.home:
            NavUtils.navigateUpFromSameTask(this);
            return true;

        default:
            return super.onOptionsItemSelected(item);

        }
    }
}

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