android image draws of five canvases save the image in the specified format and size
- 2020-05-09 19:16:29
- OfStack
Edit the image (shrink, doodle, etc.) and save it to the specified format and size.
First paste the code:
Explanation:
1. First create an Bitmap image and specify the size;
2. Create a new canvas Canvas on the image, then draw it on the canvas and save it;
3, need to save the directory File, note that if the directory such as "/sdcard/akai/" does not exist, to create (file.mkdirs ()), otherwise FileOutputStream will report an error No found;
4. Permissions need to be added: < uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/ >
First paste the code:
Bitmap bmp = Bitmap.createBitmap(480, 800, Config.ARGB_8888);
Canvas canvas = new Canvas(bmp);
canvas.drawBitmap(this.bmp, matrix, paint);
canvas.save(Canvas.ALL_SAVE_FLAG);
canvas.restore();
File file = new File("/sdcard/akai/");
if(!file.exists())
file.mkdirs();
try {
FileOutputStream fos = new FileOutputStream(file.getPath() + "/2.png");
bmp.compress(Bitmap.CompressFormat.PNG, 100, fos);
fos.close();
System.out.println("saveBmp is here");
} catch (Exception e) {
e.printStackTrace();
}
Explanation:
1. First create an Bitmap image and specify the size;
2. Create a new canvas Canvas on the image, then draw it on the canvas and save it;
3, need to save the directory File, note that if the directory such as "/sdcard/akai/" does not exist, to create (file.mkdirs ()), otherwise FileOutputStream will report an error No found;
4. Permissions need to be added: < uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/ >