以下的代码可以调用系统的拍照程序，
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Intent it = newIntent("android.media.action.IMAGE_CAPTURE"); startActivityForResult(it, Activity.DEFAULT_KEYS_DIALER); |
按下拍照键后，会返回到你的activity，所以你的activity要在onActivityResult方法里加一个处理，
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protectedvoidonActivityResult(intrequestCode, intresultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); try{ Bundle extras = data.getExtras(); Bitmap b = (Bitmap) extras.get("data"); take = b; ImageView img = (ImageView)findViewById(R.id.image); img.setImageBitmap(take); }catch(Exception e){ } } |
但是这样你会发现这个bitmap尺寸太小了。明显是被压缩过了，要像返回未被压缩的照片，那么你要给调用系统拍照程序intent加上参数，指定图片输出的位置。
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Intent it = newIntent("android.media.action.IMAGE_CAPTURE"); it.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(newFile(F.SD_CARD_TEMP_PHOTO_PATH))); startActivityForResult(it, Activity.DEFAULT_KEYS_DIALER); |
这样就是大图片返回了。
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protectedvoidonActivityResult(intrequestCode, intresultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); try{ ImageView img = (ImageView)findViewById(R.id.image); take = U.ResizeBitmap(U.getBitmapForFile(F.SD_CARD_TEMP_PHOTO_PATH), 640); img.setImageBitmap(take); imgflag = true; }catch(Exception e){ } } |
另外注意一下，返回的那个bitmap会很大，你用完以后要把它回收掉，不然你很容易内存报oom错误
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publicstaticBitmap ResizeBitmap(Bitmap bitmap, intnewWidth) { intwidth = bitmap.getWidth(); intheight = bitmap.getHeight(); floattemp = ((float) height) / ((float) width); intnewHeight = (int) ((newWidth) * temp); floatscaleWidth = ((float) newWidth) / width; floatscaleHeight = ((float) newHeight) / height; Matrix matrix = newMatrix(); // resize the bit map matrix.postScale(scaleWidth, scaleHeight); // matrix.postRotate(45); Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); bitmap.recycle(); returnresizedBitmap; } |