我正在尝试在图像上画画。现在我正在使用以下课程。
public class DrawingPaint extends View implements View.OnTouchListener {
private Canvas mCanvas;
private Path mPath;
private Paint mPaint, mBitmapPaint;
public ArrayList<PathPoints> paths = new ArrayList<PathPoints>();
private ArrayList<PathPoints> undonePaths = new ArrayList<PathPoints>();
private Bitmap mBitmap;
private int color;
private int x, y;
private String textToDraw = null;
private boolean isTextModeOn = false;
int lastColor = 0xFFFF0000;
static final float STROKE_WIDTH = 15f;
public DrawingPaint(Context context/*, int color*/) {
super(context);
//this.color = color;
setFocusable(true);
setFocusableInTouchMode(true);
this.setOnTouchListener(this);
mBitmapPaint = new Paint(Paint.DITHER_FLAG);
/*mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(STROKE_WIDTH);
mPaint.setTextSize(30);
mPath = new Path();
paths.add(new PathPoints(mPath, color, false));
mCanvas = new Canvas();*/
}
public void colorChanged(int color) {
this.color = color;
mPaint.setColor(color);
}
public void setColor(int color) {
mPaint = new Paint();
this.color = color;
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(color);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(STROKE_WIDTH);
mPaint.setTextSize(30);
mPath = new Path();
paths.add(new PathPoints(mPath, color, false));
mCanvas = new Canvas();
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
// mBitmap = AddReportItemActivity.mPhoto;
mBitmap = CustomGalleryHandler.getmInstance().getBitmapSend();
float xscale = (float) w / (float) mBitmap.getWidth();
float yscale = (float) h / (float) mBitmap.getHeight();
if (xscale > yscale) // make sure both dimensions fit (use the
// smaller scale)
xscale = yscale;
float newx = (float) w * xscale;
float newy = (float) h * xscale; // use the same scale for both
// dimensions
// if you want it centered on the display (black borders)
mBitmap = Bitmap.createScaledBitmap(mBitmap, this.getWidth(),
this.getHeight(), true);
// mCanvas = new Canvas(mBitmap);
}
@Override
protected void onDraw(Canvas canvas) {
canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
for (PathPoints p : paths) {
mPaint.setColor(p.getColor());
Log.v("", "Color code : " + p.getColor());
if (p.isTextToDraw()) {
canvas.drawText(p.textToDraw, p.x, p.y, mPaint);
} else {
canvas.drawPath(p.getPath(), mPaint);
}
}
}
private float mX, mY;
private static final float TOUCH_TOLERANCE = 0;
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 = new Path();
paths.add(new PathPoints(mPath, color, false));
}
private void drawText(int x, int y) {
this.x = x;
this.y = y;
paths.add(new PathPoints(color, textToDraw, true, x, y));
// mCanvas.drawText(textToDraw, x, y, mPaint);
}
@Override
public boolean onTouch(View arg0, MotionEvent event) {
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (!isTextModeOn) {
touch_start(x, y);
invalidate();
}
break;
case MotionEvent.ACTION_MOVE:
if (!isTextModeOn) {
touch_move(x, y);
invalidate();
}
break;
case MotionEvent.ACTION_UP:
if (isTextModeOn) {
drawText((int) x, (int) y);
invalidate();
} else {
touch_up();
invalidate();
}
break;
}
return true;
}
public void onClickUndo() {
try {
if (paths.size() > 0) {
undonePaths.add(paths.remove(paths.size() - 1));
invalidate();
} else {
}
} catch (Exception e) {
e.toString();
}
}
public void onClickRedo() {
try {
if (undonePaths.size() > 0) {
paths.add(undonePaths.remove(undonePaths.size() - 1));
invalidate();
} else {
}
} catch (Exception e) {
e.toString();
}
}
}
以下方法用于Activity扩展类
public class GalleryImageFullScreen extends Activity implements View.OnClickListener {
private ImageView mFullScreenImage;
private ImageView /*mWhiteColor,*//* mGreenColor, mSkyBlueColor, mYellowColor, mRedColor, mBlackColor,*/ mUndoIcon,
mPaintImageSave, mPaintImageDelete, mRedoIcon;
RoundedImageView mWhiteColor, mGreenColor, mSkyBlueColor, mYellowColor, mRedColor, mBlackColor;
// private Signature mSignature;
private RelativeLayout mDrawLayout;
private DrawingPaint mDrawViewSignature;
private AlertDialog mAlertDialog = null;
Bitmap bitmapss;
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.gallery_fullscreen);
super.onCreate(savedInstanceState);
mUndoIcon =(ImageView)findViewById(R.id.erase_icon);
mFullScreenImage=(ImageView)findViewById(R.id.img_fullscreen);
mDrawLayout=(RelativeLayout)findViewById(R.id.img_fullscreen_layout);
mPaintImageSave=(ImageView)findViewById(R.id.paint_img_save);
mPaintImageDelete=(ImageView)findViewById(R.id.paint_img_delete);
mRedoIcon=(ImageView)findViewById(R.id.img_redo);
mWhiteColor.setOnClickListener(this);
mGreenColor.setOnClickListener(this);
mSkyBlueColor.setOnClickListener(this);
mYellowColor.setOnClickListener(this);
mRedColor.setOnClickListener(this);
mBlackColor.setOnClickListener(this);
mUndoIcon.setOnClickListener(this);
mPaintImageSave.setOnClickListener(this);
mPaintImageDelete.setOnClickListener(this);
mRedoIcon.setOnClickListener(this);
// mSignature = new Signature(GalleryImageFullScreen.this, null);
try {
Intent i=getIntent();
Bitmap image = null;
image = BitmapFactory.decodeFile(PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen());
CustomGalleryHandler.getmInstance().setBitmapSend(image);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(new File(PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen()).getAbsolutePath(), options);
int imageHeight = options.outHeight;
int imageWidth = options.outWidth;
mDrawLayout.getLayoutParams().width = imageWidth;
mDrawLayout.getLayoutParams().height = imageHeight;
//RelativeLayout.LayoutParams layout_description = new RelativeLayout.LayoutParams(imageWidth,imageHeight);
// mDrawLayout.setLayoutParams(layout_description);
Bitmap mSignatureBitmapImage = Bitmap.createBitmap(imageWidth,
imageHeight, Bitmap.Config.ARGB_8888);
mDrawViewSignature = new DrawingPaint(GalleryImageFullScreen.this/*, lastColor*/);
mDrawViewSignature.setDrawingCacheEnabled(true);
mDrawViewSignature.measure(
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
mDrawViewSignature.layout(0, 0, mDrawViewSignature.getMeasuredWidth(),
mDrawViewSignature.getMeasuredHeight());
mDrawViewSignature.buildDrawingCache(true);
Canvas canvas = new Canvas(mSignatureBitmapImage);
Drawable bgDrawable = mDrawLayout.getBackground();
if (bgDrawable != null) {
bgDrawable.draw(canvas);
} else {
canvas.drawColor(Color.WHITE);
}
mDrawLayout.draw(canvas);
ByteArrayOutputStream bs = new ByteArrayOutputStream();
mSignatureBitmapImage.compress(Bitmap.CompressFormat.PNG, 50, bs);
}
catch (Exception e)
{
Logger.d("", "" + e.toString());
}
mDrawViewSignature.setColor(getResources().getColor(R.color.black));
mDrawLayout.addView(mDrawViewSignature);
}
@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.paint_img_save:
try {
Bitmap editedImage = Bitmap.createBitmap(mDrawViewSignature
.getDrawingCache());
editedImage = Bitmap.createScaledBitmap(editedImage, mDrawViewSignature.getWidth(), mDrawViewSignature.getHeight(),
true);
if(editedImage!=null) {
final Bitmap finalEditedImage = editedImage;
mAlertDialog = Alerts.getInstance().createConfirmationDialog(this, this.getResources().getString(R.string.painting_image_save), new View.OnClickListener() {
@Override
public void onClick(View v) {
/*Bitmap editedImage = Bitmap.createBitmap(mDrawViewSignature
.getDrawingCache());
editedImage = Bitmap.createScaledBitmap(editedImage, mDrawViewSignature.getWidth(), mDrawViewSignature.getHeight(),
true);*/
//saveImageToInternalStorage(finalEditedImage);
storeImage(finalEditedImage);
PreferenceForCustomCamera.getInstance().setEditedURL(PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen());
callToGalleyActivity();
mAlertDialog.dismiss();
}
});
mAlertDialog.show();
}
}
catch (Exception e)
{
Logger.d("paint_img_save",""+e.toString());
}
break;
case R.id.paint_img_delete:
try {
if (!PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen().equals("") && !PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen().equals("null")) {
mAlertDialog = Alerts.getInstance().createConfirmationDialog(this, this.getResources().getString(R.string.painting_image_path_delete), new View.OnClickListener() {
@Override
public void onClick(View v) {
// DatabaseHelper.getInstance().deleteParticularVideoPath(PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen());
CustomGalleryHandler.getmInstance().deleteParticularImages(PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen());
CustomGalleryHandler.getmInstance().deleteParticularImageFromInternalStorage(PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen());
callToGalleyActivity();
mAlertDialog.dismiss();
}
});
}
mAlertDialog.show();
}
catch (Exception e)
{
Logger.d("paint_img_delete",""+e.toString());
}
break;
case R.id.img_redo:
mDrawViewSignature.onClickRedo();
break;
}
}
private void saveImageToInternalStorage(Bitmap finalBitmap) {
try {
File myDir = new File(PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen());
myDir.mkdirs();
Logger.d("ListOfPhoto",""+myDir.getAbsolutePath());
Logger.d("ListOfPhotoRename",""+PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen());
for(File files: myDir.listFiles())
{
Logger.d("ListOfPhoto",""+files.getAbsolutePath());
Logger.d("ListOfPhotoRename",""+PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen());
}
Picasso.with(getApplicationContext()).load(PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen()).skipMemoryCache();
/*Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Image-" + "3680" + ".png";
File file = new File(myDir, fname);
if (file.exists()) {
file.delete();
}*/
try {
if(myDir.exists())
{
myDir.delete();
}
FileOutputStream out = new FileOutputStream(myDir);
finalBitmap.compress(Bitmap.CompressFormat.PNG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
catch (Exception e)
{
Logger.d("saveImageToInternalStorage",""+e.toString());
}
}
private void storeImage(Bitmap image) {
File pictureFile = new File(PreferenceForCustomCamera.getInstance().getImagePathForGalleryFullScreen());
if (pictureFile.exists()) {
pictureFile.delete();
}
//clearImageDiskCache();
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
image.compress(Bitmap.CompressFormat.PNG, 90, fos);
fos.close();
} catch (FileNotFoundException e) {
Logger.d("GalleryImage", "File not found: " + e.getMessage());
} catch (IOException e) {
Logger.d("GalleryImage", "Error accessing file: " + e.getMessage());
}
}
public boolean clearImageDiskCache() {
File cache = new File(getApplicationContext().getCacheDir(), "picasso-cache");
if (cache.exists() && cache.isDirectory()) {
return deleteDir(cache);
}
return false;
}
public static boolean deleteDir(File dir) {
if (dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
}
// The directory is now empty so delete it
return dir.delete();
}
}
我的xml中使用以下代码进行绘制。
<RelativeLayout
android:id="@+id/img_fullscreen_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/edit_components_bar"
android:layout_centerHorizontal="true">
<ImageView
android:id="@+id/img_fullscreen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"/>
</RelativeLayout>
使用风景图像时工作正常。但是当我使用肖像图像时，图像会变得拉长。请让我知道如何使画布适合图像。
提前致谢
我改变了这段代码：
Matrix m = new Matrix();
RectF inRect = new RectF(0, 0, imageWidth, imageHeight);
RectF outRect = new RectF(0, 0, imageWidth-10, imageHeight-10);
m.setRectToRect(inRect, outRect, Matrix.ScaleToFit.CENTER);
Bitmap mSignatureBitmapImage = Bitmap.createBitmap(image,0,0,imageWidth,
imageHeight, m,true);
我也使用了这段代码。但不工作：
Matrix m = mFullScreenImage.getImageMatrix();
RectF drawableRect = new RectF(0, 0, imageWidth, imageHeight);
RectF viewRect = new RectF(0, 0, mFullScreenImage.getWidth(), mFullScreenImage.getHeight());
m.setRectToRect(drawableRect, viewRect, Matrix.ScaleToFit.CENTER);
Bitmap mSignatureBitmapImage = Bitmap.createBitmap(image,0,0,imageWidth,
imageHeight, m,true);