Hello all…
In today’s post I will show you how to store an image in an SQLite database and retrieve it.
Check out the output after running the program.
This is the layout for the MainActivity.
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/get_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textView1"
android:layout_alignRight="@+id/textView1"
android:text="Get Image" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/button1"
android:layout_alignLeft="@+id/button1"
android:src="@drawable/ic_action_search"
android:visibility="gone" />
<Button
android:id="@+id/save_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textView1"
android:layout_alignRight="@+id/textView1"
android:text="Save Image in DB" />
<Button
android:id="@+id/read_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textView1"
android:layout_alignRight="@+id/textView1"
android:text="Read Image from DB" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
tools:context=".MainActivity" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/button1"
android:layout_alignLeft="@+id/button1"
android:layout_marginBottom="40dp"
android:src="@drawable/ic_action_search" />
</LinearLayout>
</ScrollView>
Now the code for the Activity.
MainActivity.java
package com.coderzheaven.saveimageindb;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
protected static TextView textView;
protected static ImageView image1, image2;
protected Button get_image, save_image, read_image;
private String selectedImagePath;
private static final int SELECT_PICTURE = 1;
String DB_NAME = Environment.getExternalStorageDirectory() + "/test.db";
String TABLE_NAME = "mytable";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
image1 = (ImageView) findViewById(R.id.imageView1);
image2 = (ImageView) findViewById(R.id.imageView2);
textView = (TextView) findViewById(R.id.textView1);
get_image = (Button) findViewById(R.id.get_image);
get_image.setOnClickListener(this);
save_image = (Button) findViewById(R.id.save_image);
save_image.setOnClickListener(this);
read_image = (Button) findViewById(R.id.read_image);
read_image.setOnClickListener(this);
}
public void onClick(View v) {
int id = v.getId();
switch (id) {
case R.id.get_image:
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(
Intent.createChooser(intent, "Select Picture"),
SELECT_PICTURE);
break;
case R.id.save_image:
createTable();
saveInDB();
break;
case R.id.read_image:
readFromDB();
break;
default:
break;
}
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
System.out.println("Image Path : " + selectedImagePath);
image1.setVisibility(View.VISIBLE);
image1.setImageURI(selectedImageUri);
}
}
}
@SuppressWarnings("deprecation")
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
void createTable() {
SQLiteDatabase myDb = openOrCreateDatabase(DB_NAME,
Context.MODE_PRIVATE, null);
String MySQL = "create table if not exists "
+ TABLE_NAME
+ " (_id INTEGER primary key autoincrement, name TEXT not null, image BLOB);";
myDb.execSQL(MySQL);
myDb.close();
}
void saveInDB() {
SQLiteDatabase myDb = openOrCreateDatabase(DB_NAME,
Context.MODE_PRIVATE, null);
byte[] byteImage1 = null;
String s = myDb.getPath();
myDb.execSQL("delete from " + TABLE_NAME); // clearing the table
ContentValues newValues = new ContentValues();
String name = "CoderzHeaven";
newValues.put("name", name);
try {
FileInputStream instream = new FileInputStream(selectedImagePath);
BufferedInputStream bif = new BufferedInputStream(instream);
byteImage1 = new byte[bif.available()];
bif.read(byteImage1);
newValues.put("image", byteImage1);
long ret = myDb.insert(TABLE_NAME, null, newValues);
if (ret < 0)
textView.append("Error");
} catch (IOException e) {
textView.append("Error Exception : " + e.getMessage());
}
myDb.close();
textView.append("\n Saving Details \n Name : " + name);
textView.append("\n Image Size : " + byteImage1.length + " KB");
textView.append("\n Saved in DB : " + s + "\n");
Toast.makeText(this.getBaseContext(),
"Image Saved in DB successfully.", Toast.LENGTH_SHORT).show();
}
void readFromDB() {
byte[] byteImage2 = null;
SQLiteDatabase myDb;
myDb = openOrCreateDatabase(DB_NAME, Context.MODE_PRIVATE, null);
Cursor cur = myDb.query(TABLE_NAME, null, null, null, null, null, null);
cur.moveToFirst();
while (cur.isAfterLast() == false) {
textView.append("\n Reading Details \n Name : " + cur.getString(1));
cur.moveToNext();
}
// /////Read data from blob field////////////////////
cur.moveToFirst();
byteImage2 = cur.getBlob(cur.getColumnIndex("image"));
setImage(byteImage2);
cur.close();
myDb.close();
Toast.makeText(this.getBaseContext(),
"Image read from DB successfully.", Toast.LENGTH_SHORT).show();
Toast.makeText(this.getBaseContext(),
"If your image is big, please scrolldown to see the result.",
Toast.LENGTH_SHORT).show();
}
void setImage(byte[] byteImage2) {
image2.setImageBitmap(BitmapFactory.decodeByteArray(byteImage2, 0,
byteImage2.length));
textView.append("\n Image Size : " + byteImage2.length + " KB");
}
}
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