Draw on Picture and save : Bitmap « 2D Graphics « Android

1. Android
2. 2D Graphics
3. Bitmap

Draw on Picture and save

    
package app.test;

import java.io.FileNotFoundException;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.widget.ImageView;
import java.io.OutputStream;
import android.content.ContentValues;
import android.graphics.Bitmap.CompressFormat;
import android.provider.MediaStore.Images.Media;
import android.widget.Toast;

public class Test extends Activity implements OnClickListener,
    OnTouchListener {

  ImageView choosenImageView;
  Button choosePicture;
  Button savePicture;

  Bitmap bmp;
  Bitmap alteredBitmap;
  Canvas canvas;
  Paint paint;
  Matrix matrix;
  float downx = 0;
  float downy = 0;
  float upx = 0;
  float upy = 0;

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

    choosenImageView = (ImageView) this.findViewById(R.id.ChoosenImageView);
    choosePicture = (Button) this.findViewById(R.id.ChoosePictureButton);
    savePicture = (Button) this.findViewById(R.id.SavePictureButton);

    savePicture.setOnClickListener(this);
    choosePicture.setOnClickListener(this);
    choosenImageView.setOnTouchListener(this);
  }

  public void onClick(View v) {

    if (v == choosePicture) {
      Intent choosePictureIntent = new Intent(
          Intent.ACTION_PICK,
          android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
      startActivityForResult(choosePictureIntent, 0);
    } else if (v == savePicture) {

      if (alteredBitmap != null) {
        ContentValues contentValues = new ContentValues(3);
        contentValues.put(Media.DISPLAY_NAME, "Draw On Me");

        Uri imageFileUri = getContentResolver().insert(Media.EXTERNAL_CONTENT_URI, contentValues);
        try {
          OutputStream imageFileOS = getContentResolver().openOutputStream(imageFileUri);
          alteredBitmap.compress(CompressFormat.JPEG, 90, imageFileOS);
          Toast t = Toast.makeText(this, "Saved!", Toast.LENGTH_SHORT);
          t.show();

        } catch (Exception e) {
          Log.v("EXCEPTION", e.getMessage());
        }
      }
    }
  }

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

    if (resultCode == RESULT_OK) {
      Uri imageFileUri = intent.getData();
      try {
        BitmapFactory.Options bmpFactoryOptions = new BitmapFactory.Options();
        bmpFactoryOptions.inJustDecodeBounds = true;
        bmp = BitmapFactory.decodeStream(getContentResolver().openInputStream(
                imageFileUri), null, bmpFactoryOptions);

        bmpFactoryOptions.inJustDecodeBounds = false;
        bmp = BitmapFactory.decodeStream(getContentResolver().openInputStream(
                imageFileUri), null, bmpFactoryOptions);

        alteredBitmap = Bitmap.createBitmap(bmp.getWidth(), bmp
            .getHeight(), bmp.getConfig());
        canvas = new Canvas(alteredBitmap);
        paint = new Paint();
        paint.setColor(Color.GREEN);
        paint.setStrokeWidth(5);
        matrix = new Matrix();
        canvas.drawBitmap(bmp, matrix, paint);

        choosenImageView.setImageBitmap(alteredBitmap);
        choosenImageView.setOnTouchListener(this);
      } catch (Exception e) {
        Log.v("ERROR", e.toString());
      }
    }
  }
  public boolean onTouch(View v, MotionEvent event) {
    int action = event.getAction();
    switch (action) {
    case MotionEvent.ACTION_DOWN:
      downx = event.getX();
      downy = event.getY();
      break;
    case MotionEvent.ACTION_MOVE:
      upx = event.getX();
      upy = event.getY();
      canvas.drawLine(downx, downy, upx, upy, paint);
      choosenImageView.invalidate();
      downx = upx;
      downy = upy;
      break;
    case MotionEvent.ACTION_UP:
      upx = event.getX();
      upy = event.getY();
      canvas.drawLine(downx, downy, upx, upy, paint);
      choosenImageView.invalidate();
      break;
    case MotionEvent.ACTION_CANCEL:
      break;
    default:
      break;
    }
    return true;
  }
}
//main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Choose Picture" android:id="@+id/ChoosePictureButton"/>
    <ImageView android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:id="@+id/ChoosenImageView">
    </ImageView>
     <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Save Picture" android:id="@+id/SavePictureButton"/>
</LinearLayout>

   
    
    
    
  

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