我在android中进行一些图像处理，但是在以下代码中出现了一个初始问题。
public class MainActivity extends ActionBarActivity {
private Bitmap bmp;
private int[][] rgbValues,redv,redg,redb;
public int[] nn ;
int values,val, c;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//load the image and use the bmp object to access it
bmp = BitmapFactory.decodeResource(getResources(), R.drawable.capture);
//define the array size
rgbValues = new int[bmp.getWidth()][bmp.getHeight()];
//Print in LogCat's console each of one the RGB and alpha values from the 4 corners of the image
//Top Left
Log.i("Pixel Value", "Top Left pixel: " + Integer.toHexString(bmp.getPixel(0, 0)));
//Top Right
Log.i("Pixel Value", "Top Right pixel: " + Integer.toHexString(bmp.getPixel(31, 0)));
//Bottom Left
Log.i("Pixel Value", "Bottom Left pixel: " + Integer.toHexString(bmp.getPixel(0, 31)));
//Bottom Right
Log.i("Pixel Value", "Bottom Right pixel: " + Integer.toHexString(bmp.getPixel(31, 31)));
//get the ARGB value from each pixel of the image and store it into the array
for(int i=0; i < bmp.getWidth(); i++)
{
for(int j=0; j < bmp.getHeight(); j++)
{
//This is a great opportunity to filter the ARGB values
rgbValues[i][j] = bmp.getPixel(i, j);
values = rgbValues[i][j];
int rvalue = Color.red(values);
Log.i("Pixel Value", "Red pixel: " + rvalue);
int gvalue = Color.green(values);
Log.i("Pixel Value", "Green pixel: " + gvalue);
int bvalue = Color.blue(values);
Log.i("Pixel Value", "Blue pixel " + bvalue);
}
}
ImageView miamageview ;
miamageview = ( ImageView) findViewById (R.id.imageView1);
miamageview.setImageMatrix(rgbValues);
}
我想将rgbValues矩阵显示为ImageView（或任何其他视图）中的图像，但是出现了这个错误：
"The method setImageMatrix(Matrix) in the type ImageView is not applicable for the arguments `(int[][])`".
如何将rgbValues矩阵显示为图像？
ImageView.setImageMatrix（）用于设置图像的平移，旋转和缩放矩阵。这不是用于设置RGB值。要设置RGB值，应使用Bitmap.setPixels（）或Bitmap.createBitmap（）。另外，您需要将RGB值放入一维数组，而不是二维数组。不要问我为什么，这是Android API（可能是出于速度原因）。
因此，更改代码以写入一维数组：
private int[] rgbValues;
使用array [（y * width）+ x]代替array [y] [x]或array [x] [y]来寻址一维数组，就好像它是2D数组一样：
//define the array size
rgbValues = new int[bmp.getWidth() * bmp.getHeight()];
//Print in LogCat's console each of one the RGB and alpha values from the 4 corners of the image
//Top Left
Log.i("Pixel Value", "Top Left pixel: " + Integer.toHexString(bmp.getPixel(0, 0)));
//Top Right
Log.i("Pixel Value", "Top Right pixel: " + Integer.toHexString(bmp.getPixel(31, 0)));
//Bottom Left
Log.i("Pixel Value", "Bottom Left pixel: " + Integer.toHexString(bmp.getPixel(0, 31)));
//Bottom Right
Log.i("Pixel Value", "Bottom Right pixel: " + Integer.toHexString(bmp.getPixel(31, 31)));
//get the ARGB value from each pixel of the image and store it into the array
for(int i=0; i < bmp.getWidth(); i++)
{
for(int j=0; j < bmp.getHeight(); j++)
{
//This is a great opportunity to filter the ARGB values
rgbValues[(j * bmp.getWidth()) + i] = bmp.getPixel(i, j);
values = rgbValues[(j * bmp.getWidth()) + i];
int rvalue = Color.red(values);
Log.i("Pixel Value", "Red pixel: " + rvalue);
int gvalue = Color.green(values);
Log.i("Pixel Value", "Green pixel: " + gvalue);
int bvalue = Color.blue(values);
Log.i("Pixel Value", "Blue pixel " + bvalue);
}
}
然后从此数组创建一个位图并设置为您的ImageView：
ImageView miamageview ;
miamageview = ( ImageView) findViewById (R.id.imageView1);
Bitmap bitmap = Bitmap.createBitmap(rgbValues, bmp.getWidth(), bmp.getHeight(), Bitmap.Config.ARGB_8888);
miamageview.setImageBitmap(bitmap);
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