如果你有一张图片，想实现把图片中某一类的像素点修改一下，例如：把一个图片中的全白的像素点改成你想要的颜色，可以通过如下方法实现

第一步：创建一个布局

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

/>

android:id="@+id/image1"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

/>

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:textColor="#0000FF"

/>

android:id="@+id/image2"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

/>

第二步：java程序

public class MyBitmapTestActivity extends Activity {

private ImageView image1;

private ImageView image2;

int m_BmpPixel[];

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

image1 = (ImageView) findViewById(R.id.image1);

image2 = (ImageView) findViewById(R.id.image2);

image1.setImageResource(R.drawable.image);

Bitmap bitmap = BitmapFactory.decodeResource(getResources(),

R.drawable.image);

Bitmap bitmap2 = transparentImage(bitmap);

image2.setImageBitmap(bitmap2);

}

public Bitmap transparentImage(Bitmap bmp) {

int m_ImageWidth, m_ImageHeigth;

m_ImageWidth = bmp.getWidth();

m_ImageHeigth = bmp.getHeight();

m_BmpPixel = new int[m_ImageWidth * m_ImageHeigth];

bmp.getPixels(m_BmpPixel, 0, m_ImageWidth, 0, 0, m_ImageWidth,

m_ImageHeigth);

System.out.println("AAAAAAAAAAAA2");

for (int i = 0; i < m_ImageWidth * m_ImageHeigth; i++) {

if ((m_BmpPixel[i] & 0x00ffffff) == 0x00ffffff) {

m_BmpPixel[i] = 0x7f0000ff;

}

}

System.out.println("AAAAAAAAAAAA3");

bmp.setPixels(m_BmpPixel, 0, m_ImageWidth, 0, 0, m_ImageWidth,

m_ImageHeigth);

System.out.println("AAAAAAAAAAAA4");

return bmp;

}

}

运行即得，这里不再多说。