我正在开发图像编辑器，我使用自定义类来绘制位图，这是我的代码..
private void settingBitmapToDraw() {
// TODO Auto-generated method stub
resultBitmap=Bitmap.createScaledBitmap(resultBitmap, WIDTH, HEIGHT, true);
Matrix matrix=new Matrix();
matrix.setRotate(TO_DEGREE);
tempBitmap=Bitmap.createBitmap(resultBitmap, 0, 0, WIDTH, HEIGHT,
matrix, true);
bitmap=Bitmap.createBitmap(WIDTH, HEIGHT, tempBitmap.getConfig());
canvas=new Canvas(bitmap);
invalidate();
}
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
canvas.drawBitmap(tempBitmap, xAxis, yAxis, paint);
if(overlayBitmap!=null)
{
canvas.drawBitmap(overlayBitmap, xAxis+50, yAxis+50, paint);
}
}
public void overlayImage() {
// TODO Auto-generated method stub
ImageProcessing.SAVE_STATUS=false;
overlayBitmap=BitmapFactory.decodeResource(getResources(),
R.drawable.add_image);
invalidate();
}
位图在画布上绘制，但保存时会保存为黑色图像。 这是我的保存位图代码...
try {
FileOutputStream fos=new FileOutputStream(file);
updatedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
SAVE_STATUS=true;
saveDialog.dismiss();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
更新的位图由'bitmap'
初始化public Bitmap getUpdatedImage() {
// TODO Auto-generated method stub
//width=2048 height=1232
Bitmap updatedBitmap=Bitmap.createScaledBitmap(bitmap,
orgWidth, orgHeight, true);
return updatedBitmap;
}
////////////// 我的ImageProcessing.java类有代码......
if(!SAVE_STATUS)
{
updatedBitmap=ip_DrawingClass.getUpdatedImage();
if(updatedBitmap!=null)
{
file=new File(file_root);
saveDialog.show();
}
else
{
Toast.makeText(ImageProcessing.this,
"file can't saved...", Toast.LENGTH_SHORT).show();
}
}
和saveDialog有保存按钮，其中包含用于保存上面写入的图像的代码。
///////////////////////////
@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
float xAxis,yAxis;
switch(event.getAction()&MotionEvent.ACTION_MASK)
{
case MotionEvent.ACTION_DOWN:
MODE="DRAG";
startX=event.getX();
startY=event.getY();
if(ImageProcessing.drawLineStatus)
path.moveTo(startX, startY);
break;
case MotionEvent.ACTION_POINTER_DOWN:
MODE="ZOOM";
oldDist=this.findDistanceXY(event);
break;
case MotionEvent.ACTION_MOVE:
if(MODE=="ZOOM")
{
newDist=findDistanceXY(event);
if(newDist>oldDist)
{
this.applyZooming("plus");
}
else
{
this.applyZooming("minus");
}
oldDist=newDist;
}
else if(MODE=="DRAG")
{
xAxis=event.getX();
yAxis=event.getY();
if(!lock_status)
{
this.translateImage(xAxis,yAxis,startX,startY);
}
else
{
this.translateTextOnBitmap
(xAxis,yAxis,startX,startY);
}
if(ImageProcessing.drawLineStatus)
{
path.lineTo(xAxis, yAxis);
this.drawLinesOnBitmap();
}
else
draw_line=false;
}
break;
case MotionEvent.ACTION_POINTER_UP:
MODE="DRAG";
this.setZoomBoxXY();
break;
case MotionEvent.ACTION_UP:
this.set_XY_Axis();
break;
}
return true;
}
图片翻译在这里..
public void translateImage(float x, float y, float startX, float startY) {
// TODO Auto-generated method stub
if((startX>=imageAtX&&startX<=(imageAtX+imageW))&&
(startY>=imageAtY&&startY<=(imageAtY+imageH)))
{
if(imagePortionSelected||crop_status)
{
if((startX>=selectorAtX&&startX<=(selectorAtX+ZOOM))
&&(startY>=selectorAtY&&startY<=(selectorAtY+ZOOM)))
{
left=(int)(x-(startX-selectorAtX));
top=(int)(y-(startY-selectorAtY));
right=left+ZOOM;
bottom=top+ZOOM;
checkForValidityOfPara();
}
rect.set(left, top, right, bottom);
}
else
{
xAxis=x-(startX-imageAtX);
yAxis=y-(startY-imageAtY);
}
}
invalidate();
}
答案 0 :(得分：2)
对于组合2位图，请使用以下方法
public Bitmap combineImages(Bitmap frame, Bitmap image) {
Bitmap cs = null;
Bitmap rs = null;
rs = Bitmap.createScaledBitmap(frame, image.getWidth(),
image.getHeight(), true);
cs = Bitmap.createBitmap(rs.getWidth(), rs.getHeight(),
Bitmap.Config.RGB_565);
Canvas comboImage = new Canvas(cs);
comboImage.drawBitmap(image, 0, 0, null);
comboImage.drawBitmap(rs, 0, 0, null);
if (rs != null) {
rs.recycle();
rs = null;
}
Runtime.getRuntime().gc();
return cs;
}
并且可以在任何地方使用代码保存组合图像...
Bitmap outBmp = combineImages(bmp1, bmp2);
imageFileFolder = new File(Environment.getExternalStorageDirectory(),
"FOLDER_PHOTOS");
imageFileFolder.mkdir();
FileOutputStream out1 = null;
imageFileName = new File(imageFileFolder, "file_name.jpg");
out1 = new FileOutputStream(imageFileName);
outBmp.compress(Bitmap.CompressFormat.JPEG, 100, out1);
out1.flush();
out1.close();
答案 1 :(得分：1)
使用此代码。您必须将图纸布局保存为图像。希望下面的代码可以帮助你。
Bitmap bm;
DrawingLayout.setDrawingCacheEnabled(true);
bm = DrawingLayout.getDrawingCache();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
//String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/drawn_image";
String path = getFilesDir() .getAbsolutePath();
boolean exists = (new File(path)).exists();
/*if (!exists) {
new File(path).mkdirs();
}*/
OutputStream outStream = null;
File file = new File(path, "drawn_image" + ".PNG");
try {
outStream = new FileOutputStream(file);
bm.compress(Bitmap.CompressFormat.PNG, 100, outStream);
outStream.flush();
outStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
答案 2 :(得分：1)
您没有使用更新的位图。在保存之前，在更新的位图上绘制第一个位图和覆盖位图。将 getUpdatedImage（）更改为此 -
protected void getUpdatedImage() {
int width = tempBitmap.getWidth();
int height = tempBitmap.getHeight();
Bitmap updatedBitmap=Bitmap.createScaledBitmap(bitmap,
width, height, true);
Canvas canvas = new Canvas(updatedBitmap);
canvas.drawBitmap(tempBitmap, xAxis, yAxis, paint);
if(overlayBitmap!=null)
{
canvas.drawBitmap(overlayBitmap, xAxis+50, yAxis+50, paint);
}
//now save the updated bitmap
return updatedBitmap;
}
答案 3 :(得分：0)
保存位图试试这个......-
public void savebitmap(final Bitmap bitmap)
{
AlertDialog.Builder alert = new AlertDialog.Builder(Work.this);
alert.setMessage("File name :"); //get file name from user
input = new EditText(Work.this);
input.setLayoutParams(new LayoutParams(100,50));
alert.setView(input);
alert.setNeutralButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String _mNameValue = input.getText().toString();
try
{
File fn=new File("/sdcard/"+_mNameValue+".png");
FileOutputStream out=new FileOutputStream(fn);
Toast.makeText(getApplicationContext(), "In Save",Toast.LENGTH_SHORT).show();
bitmap.compress(Bitmap.CompressFormat.PNG, 90,out);
out.flush();
out.close();
Toast.makeText(getApplicationContext(), "File is Saved in "+fn, Toast.LENGTH_SHORT).show();
}
catch(Exception e){
e.printStackTrace();
}
}
});
alert.show();
}
这在我的位置完美运作。
ontouch事件 -
paint = new Paint();
paint.setAntiAlias(true);
paint.setColor(getResources().getColor(R.color.Yellow)) ;
paint.setAlpha(opacity);
_ImageView.setAdjustViewBounds(true);
_ImageView.setImageBitmap(_MutableImage1);
canvas1 = new Canvas(_MutableImage1);
canvas1.drawRect(event.getX()-10,event.getY()-10,event.getX()+10,event.getY()+10, paint);
bitmap1=_MutableImage1.copy(Bitmap.Config.ARGB_4444,false);