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public class ImageUtils {
private final static String MEIZU = "meizu";
private final static int MEIZU_IMG_KB = 200;//魅族图片压缩限制最大这尺寸
private final static int DEFAULT_IMG_KB = 250;
private final static int compress_granularity = 4;
/**
* 压缩图片
*
* @param image
* @return
*/
public static Bitmap compressImage(Bitmap image) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
// 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中
image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
int options = 100;
// 循环判断如果压缩后图片是否大于200kb,大于继续压缩
int max_kb = DEFAULT_IMG_KB;
if (MEIZU.equalsIgnoreCase(android.os.Build.BRAND)) {
max_kb = MEIZU_IMG_KB;
}
while (baos.toByteArray().length / 1024 > max_kb) {
// 重置baos
baos.reset();
// 这里压缩options%，把压缩后的数据存放到baos中
image.compress(Bitmap.CompressFormat.JPEG, options, baos);
// 每次都减少10
options -= compress_granularity;
if (options < compress_granularity)
break;
}
// 把压缩后的数据baos存放到ByteArrayInputStream中
ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());
// 把ByteArrayInputStream数据生成图片
Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);
return bitmap;
}
/**
* 截取scrollview的屏幕
*
* @param scrollView
* @return
*/
public static Bitmap getBitmapByView(ScrollView scrollView) {
int h = 0;
Bitmap bitmap = null;
// 获取scrollview实际高度
for (int i = 0; i < scrollView.getChildCount(); i++) {
h += scrollView.getChildAt(i).getHeight();
scrollView.getChildAt(i).setBackgroundColor(
Color.parseColor("#E6E9ED"));
}
if (h == 0 || scrollView.getWidth() == 0) {
return null;
}
// 创建对应大小的bitmap
bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,
Bitmap.Config.RGB_565);
final Canvas canvas = new Canvas(bitmap);
canvas.drawARGB(0xFF, 0xFF, 0xFF, 0xFF);
scrollView.draw(canvas);
return compressImage(bitmap);
}
public static Bitmap getBitmapByListView(ListView listView) {
int h = 0;
Bitmap bitmap = null;
// 获取listView实际高度
for (int i = 0; i < listView.getChildCount(); i++) {
h += listView.getChildAt(i).getHeight();
// listView.getChildAt(i).setBackgroundColor(
// Color.parseColor("#ffffff"));
}
if (h == 0 || listView.getWidth() == 0) {
return null;
}
// 创建对应大小的bitmap
bitmap = Bitmap.createBitmap(listView.getWidth(), h,
Bitmap.Config.RGB_565);
final Canvas canvas = new Canvas(bitmap);
listView.draw(canvas);
return compressImage(bitmap);
}
public static Bitmap getBitmapByPullToRefreshListView(PullToRefreshListView listView) {
int h = 0;
Bitmap bitmap = null;
// 获取listView实际高度
for (int i = 0; i < listView.getChildCount(); i++) {
h += listView.getChildAt(i).getHeight();
// listView.getChildAt(i).setBackgroundColor(
// Color.parseColor("#ffffff"));
}
if (h == 0 || listView.getWidth() == 0) {
return null;
}
// 创建对应大小的bitmap
bitmap = Bitmap.createBitmap(listView.getWidth(), h,
Bitmap.Config.RGB_565);
final Canvas canvas = new Canvas(bitmap);
listView.draw(canvas);
return compressImage(bitmap);
}
public static Bitmap getScrollBitmap(Activity activity, ScrollView scrollView) {
int h = 0;
Bitmap bitmap = null;
// 获取listView实际高度
for (int i = 0; i < scrollView.getChildCount(); i++) {
h += scrollView.getChildAt(i).getHeight();
}
// 创建对应大小的bitmap
if (h == 0 || scrollView.getWidth() == 0) {
return null;
}
h = Math.min(h, Utils.getScreenHeight(activity)); //防止OOM
bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,
Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmap);
canvas.drawColor(Color.WHITE);
scrollView.draw(canvas);
return bitmap;
}
public static Bitmap getViewBitmap(View v) {
v.clearFocus();
v.setPressed(false);
boolean willNotCache = v.willNotCacheDrawing();
v.setWillNotCacheDrawing(false);
// Reset the drawing cache background color to fully transparent
// for the duration of this operation
int color = v.getDrawingCacheBackgroundColor();
v.setDrawingCacheBackgroundColor(0);
if (color != 0) {
v.destroyDrawingCache();
}
v.buildDrawingCache();
Bitmap cacheBitmap = v.getDrawingCache();
if (cacheBitmap == null) {
return null;
}
Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
// Restore the view
v.destroyDrawingCache();
v.setWillNotCacheDrawing(willNotCache);
v.setDrawingCacheBackgroundColor(color);
return bitmap;
}
public static Bitmap takeScreenShot(Activity activity) {
// View是你需要截图的View
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap b1 = view.getDrawingCache();
// 获取状态栏高度
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
// 获取屏幕长和高
int width = activity.getWindowManager().getDefaultDisplay().getWidth();
// 去掉标题栏
// Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);
Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, b1.getHeight()
- statusBarHeight);
view.destroyDrawingCache();
return b;
}
public static String saveBitmapPNG(Context context, Bitmap imageBitmap) {
if (imageBitmap == null) {
return null;
}
String fileName = String.valueOf(System.currentTimeMillis()) + StringPool.JPG;
File savefile = new File(Utils.getImageFileDir(context), fileName);
if (savefile.exists()) {
boolean delete = savefile.delete();
Utils.printFileDirState(delete);
}
FileOutputStream out = null;
try {
out = new FileOutputStream(savefile, false);
if (null != out) {
imageBitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
}
} catch (FileNotFoundException e) {
com.dnurse.common.logger.Log.printThrowable(e);
return null;
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return savefile.getPath();
}
public static String uploadPic(String path, AppContext appContext) {
User user = appContext.getActiveUser();
if (user != null && !TextUtils.isEmpty(path)) {
File file = new File(path);
if (!file.exists()) {
return null;
}
String sn = user.getSn();
HashMap<String, String> h1 = new HashMap<String, String>();
h1.put("sn", sn);
HashMap<String, File> h2 = new HashMap<String, File>();
h2.put("file", new File(path));
try {
String reply = BaseClient.post(appContext, DataURLs.UPLOAD_PIC, Utils.rebuildMap(h1, user), h2);
JSONObject replyJson = new JSONObject(reply);
if (NetRetKeys.SUCCESS_CODE == replyJson.optInt(NetRetKeys.STATE_CODE)) {
path = replyJson.optString(NetRetKeys.DATA);
return path;
}
/* 图片上传失败，先返回本地路径 */
return path;
} catch (Exception e) {
/* 图片上传失败，先返回本地路径 */
return path;
}
}
return "";
}
public static void copyAssetToSD(Context context, String pic) throws IOException {
OutputStream myOutput = new FileOutputStream(Utils.getImageFileDir(context) + pic);
try {
InputStream myInput = context.getAssets().open(pic);
byte[] buffer = new byte[1024];
int length = myInput.read(buffer);
while (length > 0) {
myOutput.write(buffer, 0, length);
length = myInput.read(buffer);
}
myOutput.flush();
} finally {
if (myOutput != null) {
myOutput.close();
}
}
}
private static void streamToSD(InputStream myInput, String path) throws IOException {
OutputStream myOutput = null;
try {
myOutput = new FileOutputStream(path);
byte[] buffer = new byte[1024];
int length = myInput.read(buffer);
while (length > 0) {
myOutput.write(buffer, 0, length);
length = myInput.read(buffer);
}
myOutput.flush();
myInput.close();
} finally {
if (myOutput != null) {
myOutput.close();
}
}
}
public static String assetSaveToSD(Context context, String resName) {
String baseUrl = Utils.getImageFileDir(context).getAbsolutePath();
String path = baseUrl + "/" + resName;
if (!new File(path).exists()) {
try {
streamToSD(context.getAssets().open(resName), path);
} catch (IOException e) {
}
}
return path;
}
}