android - vectorial - Guardar la función de mapa de bits a archivo

modo de mapa de bits

Question

Estoy tratando de guardar un mapa de bits en un archivo y un específico directamente usando una función que he creado. No funciona. Se bloquea después de la parte de bitmap.compress (antes de aquí3).

 File dir = new File(filepath);
if(!dir.exists())dir.mkdirs();
File file = new File(Environment.getExternalStorageDirectory() + filepath, side + ".png");
FileOutputStream fOut = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG, 85, fOut);
fOut.flush();
fOut.close();
System.out.println(filepath);
bitmap.recycle();
System.gc();

Registro de errores:

06-29 00:16:38.089: D/AndroidRuntime(3260): Shutting down VM
06-29 00:16:38.089: W/dalvikvm(3260): threadid=1: thread exiting with uncaught exception (group=0xb587f4f0)
06-29 00:16:38.089: E/AndroidRuntime(3260): FATAL EXCEPTION: main
06-29 00:16:38.089: E/AndroidRuntime(3260): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=-1, data=Intent { act=android.intent.action.VIEW dat=content://org.openintents.filemanager/mimetype//mnt/sdcard/download/02977_awreckedboatintheocean_1280x1024.jpg }} to activity {com.polygonattraction.testbirds/com.polygonattraction.testbirds.functions.SelectImageSource}: java.lang.IllegalStateException: Can''t compress a recycled bitmap
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.app.ActivityThread.handleSendResult(ActivityThread.java:2574)
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.app.ActivityThread.access$2000(ActivityThread.java:117)
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:961)
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.os.Handler.dispatchMessage(Handler.java:99)
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.os.Looper.loop(Looper.java:130)
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.app.ActivityThread.main(ActivityThread.java:3683)
06-29 00:16:38.089: E/AndroidRuntime(3260): at java.lang.reflect.Method.invokeNative(Native Method)
06-29 00:16:38.089: E/AndroidRuntime(3260): at java.lang.reflect.Method.invoke(Method.java:507)
06-29 00:16:38.089: E/AndroidRuntime(3260): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
06-29 00:16:38.089: E/AndroidRuntime(3260): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
06-29 00:16:38.089: E/AndroidRuntime(3260): at dalvik.system.NativeStart.main(Native Method)
06-29 00:16:38.089: E/AndroidRuntime(3260): Caused by: java.lang.IllegalStateException: Can''t compress a recycled bitmap
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.graphics.Bitmap.checkRecycled(Bitmap.java:180)
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.graphics.Bitmap.compress(Bitmap.java:581)
06-29 00:16:38.089: E/AndroidRuntime(3260): at com.polygonattraction.testbirds.functions.Functions.SaveToFile(Functions.java:144)
06-29 00:16:38.089: E/AndroidRuntime(3260): at com.polygonattraction.testbirds.functions.SelectImageSource.onActivityResult(SelectImageSource.java:113)
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.app.Activity.dispatchActivityResult(Activity.java:3908)
06-29 00:16:38.089: E/AndroidRuntime(3260): at android.app.ActivityThread.deliverResults(ActivityThread.java:2528)

Answer 1

la implementación guarda el mapa de bits y carga el mapa de bits directamente. rápido y fácil en la clase de mfc

void CMRSMATH1Dlg::Loadit(TCHAR *destination, CDC &memdc)
{
CImage img;
PBITMAPINFO bmi;
BITMAPINFOHEADER Info;
BITMAPFILEHEADER bFileHeader;
CBitmap bm;
CFile file2;
file2.Open(destination, CFile::modeRead | CFile::typeBinary);
file2.Read(&bFileHeader, sizeof(BITMAPFILEHEADER));
file2.Read(&Info, sizeof(BITMAPINFOHEADER));
BYTE ch;
int width = Info.biWidth;
int height = Info.biHeight;
if (height < 0)height = -height;
int size1 = width*height * 3;
int size2 = ((width * 24 + 31) / 32) * 4 * height;
int widthnew = (size2 - size1) / height;
BYTE * buffer = (BYTE *)GlobalAlloc(GPTR, size2);
//////////////////////////
HGDIOBJ old;
unsigned char alpha = 0;
int z = 0;
z = 0;
int gap = (size2 - size1) / height;
for (int y = 0;y < height;y++)
{
for (int x = 0;x < width*3;x++)
{
file2.Read(&ch, 1);
buffer[z] = ch;
z++;
}
for (int z1 = 0;z1 <gap;z1++)
{
file2.Read(&ch,1);
}
}
bm.CreateCompatibleBitmap(&memdc, width, height);
bm.SetBitmapBits(size1,buffer);
old = memdc.SelectObject(&bm);
///////////////////////////
//bm.SetBitmapBits(size1, buffer);
GetDC()->BitBlt(1, 95, width, height, &memdc, 0, 0, SRCCOPY);
memdc.SelectObject(&old);
bm.DeleteObject();
GlobalFree(buffer);
file2.Close();
}
void CMRSMATH1Dlg::saveit(CBitmap &bit1, CDC &memdc, TCHAR *destination)
{
BITMAP bm;
PBITMAPINFO bmi;
BITMAPINFOHEADER Info;
BITMAPFILEHEADER bFileHeader;
CFile file1;
CSize size = bit1.GetBitmap(&bm);
int z = 0;
BYTE ch = 0;
size.cx = bm.bmWidth;
size.cy = bm.bmHeight;
int width = size.cx;
int size1 = (size.cx)*(size.cy);
int size2 = size1 * 3;
size1 = ((size.cx * 24 + 31) / 32) *4* size.cy;
BYTE * buffer = (BYTE *)GlobalAlloc(GPTR, size2);
bFileHeader.bfType = ''B'' + (''M'' << 8);
bFileHeader.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
bFileHeader.bfSize = bFileHeader.bfOffBits + size1;
bFileHeader.bfReserved1 = 0;
bFileHeader.bfReserved2 = 0;
Info.biSize = sizeof(BITMAPINFOHEADER);
Info.biPlanes = 1;
Info.biBitCount = 24;//bm.bmBitsPixel;//bitsperpixel///////////////////32
Info.biCompression = BI_RGB;
Info.biWidth =bm.bmWidth;
Info.biHeight =-bm.bmHeight;///reverse pic if negative height
Info.biSizeImage =size1;
Info.biClrImportant = 0;
if (bm.bmBitsPixel <= 8)
{
Info.biClrUsed = 1 << bm.bmBitsPixel;
}else
Info.biClrUsed = 0;
Info.biXPelsPerMeter = 0;
Info.biYPelsPerMeter = 0;
bit1.GetBitmapBits(size2, buffer);
file1.Open(destination, CFile::modeCreate | CFile::modeWrite |CFile::typeBinary,0);
file1.Write(&bFileHeader, sizeof(BITMAPFILEHEADER));
file1.Write(&Info, sizeof(BITMAPINFOHEADER));
unsigned char alpha = 0;
for (int y = 0;y<size.cy;y++)
{
for (int x = 0;x<size.cx;x++)
{
//for reverse picture below
//z = (((size.cy - 1 - y)*size.cx) + (x)) * 3;
z = (((y)*size.cx) + (x)) * 3;
file1.Write(&buffer[z], 1);
file1.Write(&buffer[z + 1], 1);
file1.Write(&buffer[z + 2], 1);
}
for (int z = 0;z < (size1 - size2) / size.cy;z++)
{
file1.Write(&alpha, 1);
}
}
GlobalFree(buffer);
file1.Close();
file1.m_hFile = NULL;
}

Answer 2

1. Necesita un permiso apropiado en manifest.xml :

   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

2. out.flush() comprueba que el out no es nulo ..

3. String file_path = Environment.getExternalStorageDirectory().getAbsolutePath() +
   "/PhysicsSketchpad";
   File dir = new File(file_path);
   if(!dir.exists())
   dir.mkdirs();
   File file = new File(dir, "sketchpad" + pad.t_id + ".png");
   FileOutputStream fOut = new FileOutputStream(file);
   bmp.compress(Bitmap.CompressFormat.PNG, 85, fOut);
   fOut.flush();
   fOut.close();

Answer 3

Aquí está la función que te ayuda

private void saveBitmap(Bitmap bitmap,String path){
if(bitmap!=null){
try {
FileOutputStream outputStream = null;
try {
outputStream = new FileOutputStream(path); //here is set your file path where you want to save or also here you can set file object directly
bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream); // bitmap is your Bitmap instance, if you want to compress it you can compress reduce percentage
// PNG is a lossless format, the compression factor (100) is ignored
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (outputStream != null) {
outputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

Answer 4

Creo que esta es una respuesta mucho mejor.

dos ejemplos funcionan para mí, para su referencia.

Bitmap bitmap = Utils.decodeBase64(base64);
try{
File file = new File(filePath);
FileOutputStream fOut = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG, 85, fOut);
fOut.flush();
fOut.close();}
catch (Exception e) {
e.printStackTrace();
LOG.i(null, "Save file error!");
return false;
}

y éste

 Bitmap savePic = Utils.decodeBase64(base64);
File file = new File(filePath);
File path = new File(file.getParent());
if (savePic != null) {
try {
// build directory
if (file.getParent() != null && !path.isDirectory()) {
path.mkdirs();
}
// output image to file
FileOutputStream fos = new FileOutputStream(filePath);
savePic.compress(Bitmap.CompressFormat.PNG, 90, fos);
fos.close();
ret = true;
} catch (Exception e) {
e.printStackTrace();
}
} else {
LOG.i(TAG, "savePicture image parsing error");
}

Creo que esta es una respuesta mucho mejor.