android - 将图像从文件转换为 ByteBuffer。

Question

我需要将文件中包含的图像转换为ByteBuffer.

final File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), "wakaicon.png");

try {
    FileInputStream fileInputStream = null;
    try {               
        fileInputStream = new FileInputStream(file);
    } catch(FileNotFoundException e) {              
        Log.e("DEBUG", "[Picture Not Found]");
    }
} /* Exception handling */

Answer 1

我找到了解决方案：文件->位图->字节数组

Bitmap bitmap = BitmapFactory.decodeFile(file.getPath());
byte[] pixels = new byte[bitmap.getWidth() * bitmap.getHeight()]; 
for (int i = 0; i < bitmap.getWidth(); ++i) { 
for (int j = 0; j < bitmap.getHeight(); ++j) 
pixels[i + j] = (byte) ((bitmap.getPixel(i, j) & 0x80) >> 7); } 
}