I have a view that extends from EditText that allows the user to write a text and then draw with the finger in the same view.
What I want is to save that item for a future use, I'm thinking on when the app is destroyed and then opened the draws are removed. What I want is a way to save this drawing for the next time that the user opens the app.
For the text I used sharedPreferences that save the text in the onPause, and for the draw I don't know how can be saved.
I think that saving the draw as an image file not was a way to save it, but I don't know.
EDIT:
I tried saving the Bitmap as a jpeg and then drawing to the canvas. But it don't work, at the end, it shows the object in color black and don't allow me to draw.
My code is the following, at the end are written the two methods that I created, but that they don't work well. They are saveBitmap() and openBitmap():
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import android.content.Context;
import android.graphics.*;
import android.os.Environment;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.EditText;
public class DrawEditText extends EditText {
private Bitmap mBitmap;
private Canvas mCanvas;
private Path mPath;
private Paint mBitmapPaint;
private Paint mPaint;
private MaskFilter mEmboss;
private MaskFilter mBlur;
private int brush;
private Boolean drawing;
private int maxLines;
public DrawEditText(Context c) {
super(c);
//This initializes all the objects
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
mBitmapPaint.setColor(Color.TRANSPARENT);
mPaint = new Paint();
mPaint.setColor(Color.BLACK);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(5);
mPaint.setAntiAlias(true);
mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 },
0.4f, 6, 3.5f);
mBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL);
drawing = false;
brush = -1;
maxLines = 20;
}
public DrawEditText(Context c, AttributeSet attrs) {
super(c, attrs);
//This initializes all the objects
mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
mPaint = new Paint();
mPaint.setColor(Color.BLACK);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(5);
mPaint.setAntiAlias(true);
mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 },
0.4f, 6, 3.5f);
mBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL);
drawing = false;
brush = -1;
maxLines = 20;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
canvas.drawPath(mPath, mPaint);
super.onDraw(canvas);
}
private float mX, mY;
private static final float TOUCH_TOLERANCE = 4;
private void touch_start(float x, float y) {
mPath.reset();
mPath.moveTo(x, y);
mX = x;
mY = y;
}
private void touch_move(float x, float y) {
float dx = Math.abs(x - mX);
float dy = Math.abs(y - mY);
if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
mX = x;
mY = y;
}
}
private void touch_up() {
mPath.lineTo(mX, mY);
// commit the path to our offscreen
mCanvas.drawPath(mPath, mPaint);
// kill this so we don't double draw
mPath.reset();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
//This conditional makes that if not it's drawing no points are saved and no points are drawed
if (drawing){
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
touch_start(x, y);
invalidate();
break;
case MotionEvent.ACTION_MOVE:
touch_move(x, y);
invalidate();
break;
case MotionEvent.ACTION_UP:
touch_up();
invalidate();
break;
}
return true;
} else {
return super.onTouchEvent(event);
}
}
public void changePaint(int stroke, int color){
mPaint.setColor(color);
mPaint.setStrokeWidth(stroke);
}
public void clear(){
mCanvas.drawColor(0x00AAAAAA);
mCanvas.drawColor( 0, PorterDuff.Mode.CLEAR );
setText("");
}
public void changeBrush(int id){
//String[] ids={"emboss", "blur", "another"};
switch (id) {
case 0:
mPaint.setMaskFilter(mEmboss);
brush = 0;
break;
case 1:
mPaint.setMaskFilter(mBlur);
brush = 1;
break;
case 2:
mPaint.setMaskFilter(null);
brush = -1;
break;
default:
mPaint.setMaskFilter(null);
brush = -1;
break;
}
}
public int getBrush(){
//String[] ids={"emboss", "blur", "another"};
return brush;
}
public void eraser(){
mPaint.setMaskFilter(null);
mPaint.setColor(0x00AAAAAA);
}
public void setDrawing(Boolean drawing){
this.drawing = drawing;
}
public Boolean isDrawing(){
return drawing;
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
TextWatcher watcher = new TextWatcher() {
private String text;
private int beforeCursorPosition = 0;
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
text = s.toString();
beforeCursorPosition = start;
}
@Override
public void afterTextChanged(Editable s) {
/* turning off listener */
removeTextChangedListener(this);
/* handling lines limit exceed */
if (DrawEditText.this.getLineCount() > maxLines) {
DrawEditText.this.setText(text);
DrawEditText.this.setSelection(beforeCursorPosition);
}
/* turning on listener */
addTextChangedListener(this);
}
};
this.addTextChangedListener(watcher);
}
@Override
public int getMaxLines() {
return maxLines;
}
@Override
public void setMaxLines(int maxLines) {
this.maxLines = maxLines;
}
public void saveBitmap(){
mCanvas.setBitmap(mBitmap);
File sd = Environment.getExternalStorageDirectory();
File myDir = new File(sd + "/tweeet");
myDir.mkdirs();
File f = new File(myDir, ".drawing.jpeg");
try {
if (myDir.canWrite()) {
f.createNewFile();
OutputStream os = new FileOutputStream(f);
mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, os);
os.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public void openBitmap(){
File sd = Environment.getExternalStorageDirectory();
File myDir = new File(sd + "/tweeet");
myDir.mkdirs();
File f = new File(myDir, ".drawing.jpeg");
mBitmap = BitmapFactory.decodeFile(f.getPath());
}
}