public class WallPaperUtils {
private static final String TAG = WallPaperUtils.class.getSimpleName();
private Handler mHandler = new Handler(Looper.getMainLooper());
private Context mContext;
private LoadWallPaperCallback loadWallPaperCallback;
public WallPaperUtils(Context context) {
mContext = context;
init(context);
}
private BroadcastReceiver wallPaperReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
LogUtils.i(TAG, "onReceive:" + action);
if (Intent.ACTION_WALLPAPER_CHANGED.equals(action)) {
doWallpaperWork();
}
}
};
private void init(Context context) {
mContext = context;
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(Intent.ACTION_WALLPAPER_CHANGED);
context.registerReceiver(wallPaperReceiver, intentFilter);
}
public void getWallPagerBright(LoadWallPaperCallback loadWallPaperCallback) {
this.loadWallPaperCallback = loadWallPaperCallback;
doWallpaperWork();
}
private Runnable runnable = new Runnable() {
@Override
public void run() {
LogUtils.i(TAG, "start doWallpaperWork");
Drawable wallpaper = mContext.getWallpaper();
if (wallpaper != null) {
Bitmap scaleBitmap = scaleMatrix(drawable2bitmap(wallpaper), 0.05f, 0.05f);
final int brightJava = getBright(scaleBitmap);
final float saturation = getSaturation(scaleBitmap);
LogUtils.i(TAG, "brightJava:" + brightJava);
LogUtils.i(TAG, "saturation:" + saturation);
if (loadWallPaperCallback != null) {
loadWallPaperCallback.onWallPaperBrightChanged(brightJava);
}
}
LogUtils.i(TAG, "doWallpaperWork end");
}
};
private void doWallpaperWork() {
mHandler.post(runnable);
}
private Bitmap drawable2bitmap(Drawable drawable) {
BitmapDrawable bd = (BitmapDrawable) drawable;
return bd.getBitmap();
}
private static Bitmap scaleMatrix(Bitmap bitmap, float scaleX, float scaleY) {
LogUtils.i(TAG, "scaleMatrix start");
try {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
float scaleW = scaleX;
float scaleH = scaleY;
Matrix matrix = new Matrix();
// 长和宽放大缩小的比例
matrix.postScale(scaleW, scaleH);
Bitmap scaleBitmap = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, false);
LogUtils.i(TAG, "scaleMatrix normal end");
return scaleBitmap;
} catch (Exception e) {
e.printStackTrace();
}
LogUtils.i(TAG, "scaleMatrix error end");
return bitmap;
}
/**
* 获取图片亮度 范围（0～255）
*
* @param bm Bitmap
* @return Bright
*/
private int getBright(Bitmap bm) {
LogUtils.i(TAG, "getBright start");
if (bm == null) {
return -1;
}
int width = bm.getWidth();
int height = bm.getHeight();
int r, g, b;
int count = 0;
int bright = 0;
count = width * height;
int[] buffer = new int[width * height];
bm.getPixels(buffer, 0, width, 0, 0, width, height);
LogUtils.i(TAG, "width:" + width + ",height:" + height);
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
//bm.getPixel(i, j);
int localTemp = buffer[j * width + i];
r = (localTemp >> 16) & 0xff;
g = (localTemp >> 8) & 0xff;
b = localTemp & 0xff;
bright = (int) (bright + 0.299 * r + 0.587 * g + 0.114 * b);
}
}
LogUtils.i(TAG, "getBright end");
return bright / count;
}
/**
* 获取图片饱和度Saturation 范围（0～1）
*
* @param bm Bitmap
* @return Saturation
*/
private float getSaturation(Bitmap bm) {
LogUtils.i(TAG, "getSaturation start");
if (bm == null) {
return -1;
}
int width = bm.getWidth();
int height = bm.getHeight();
int r, g, b;
int count = 0;
float saturation = 0;
count = width * height;
int[] buffer = new int[width * height];
bm.getPixels(buffer, 0, width, 0, 0, width, height);
LogUtils.i(TAG, "width:" + width + ",height:" + height);
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
int localTemp = buffer[j * width + i];
r = (localTemp >> 16) & 0xff;
g = (localTemp >> 8) & 0xff;
b = localTemp & 0xff;
int max = Math.max(Math.max(r, g), b);
int min = Math.min(Math.min(r, g), b);
saturation += max == 0 ? 0 : (max - min) / (float) max;
}
}
LogUtils.i(TAG, "getSaturation end");
return saturation / (float) count;
}
/**
* 获取图片色相Hue 范围（0～1）
*
* @param bm Bitmap
* @return Hue
*/
private float getHue(Bitmap bm) {
LogUtils.i(TAG, "getHue start");
if (bm == null) {
return -1;
}
int width = bm.getWidth();
int height = bm.getHeight();
int r, g, b;
int count = 0;
float hue = 0;
float hueSum = 0;
count = width * height;
int[] buffer = new int[width * height];
bm.getPixels(buffer, 0, width, 0, 0, width, height);
LogUtils.i(TAG, "width:" + width + ",height:" + height);
for (int i = 0; i < width; i++) {
for (int j = 0; j < height; j++) {
int localTemp = buffer[j * width + i];
r = (localTemp >> 16) & 0xff;
g = (localTemp >> 8) & 0xff;
b = localTemp & 0xff;
int max = Math.max(Math.max(r, g), b);
int min = Math.min(Math.min(r, g), b);
if (r == max) {
hue = (max - min) == 0 ? 0 : ((g - b) / (float) (max - min));
}
if (g == max) {
hue = 2 + ((max - min) == 0 ? 0 : ((b - r) / (float) (max - min)));
}
if (b == max) {
hue = 4 + ((max - min) == 0 ? 0 : ((r - g) / (float) (max - min)));
}
hue = (hue / 6f);
if (hue < 0) {
hue = (hue / 360f + 1);
}
hueSum += hue;
}
}
LogUtils.i(TAG, "getHue end");
return hueSum / (float) count;
}
public interface LoadWallPaperCallback {
/**
* 墙纸亮度的回调
*
* @param bright 亮度
*/
void onWallPaperBrightChanged(int bright);
}
}
Android 获取桌面壁纸亮度
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