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　　在android開發中, 在一些編輯個人信息的時候,經常會有頭像這么一個東西,就兩個方面,調用系統相機拍照,調用系統圖庫獲取圖片.但是往往會遇到各種問題:

1.oom?

2.圖片方向不對

3.activity result 的時候data == null

4.調用圖庫的時候沒找到軟件

嘿嘿..開代碼:

首先是調用系統拍照,和圖庫的代碼

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package?com.chzh.fitter.util; import?java.io.File; import?android.app.Activity; import?android.content.Context; import?android.content.Intent; import?android.database.Cursor; import?android.net.Uri; import?android.provider.MediaStore; import?android.widget.Toast; //在onActivityResult方法中根據requestCode和resultCode來獲取當前拍照的圖片地址。 //注意：這里有個問題，在有些機型當中（如SamsungI939、note2等）遇見了當拍照并存儲之后，intent當中得到的data為空： /** ?* data = null 的情況主要是由于拍照的時候橫屏了,導致重新create, 普通的解決方法可以在sharedpreference里面保存拍照文件的路徑(onSaveInstance保存), ?* 在onRestoreSaveInstance里面在獲取出來. ?* 最簡單的可以用fileUtil 里面的一個靜態變量保存起來.. ?* */ public?class?CameraUtil { ????private?static?final?String IMAGE_TYPE =?"image/*"; ????private?Context mContext; ????public?CameraUtil(Context context) { ????????mContext = context; ????} ????/** ?????* 打開照相機 ?????* @param activity 當前的activity ?????* @param requestCode 拍照成功時activity forResult 的時候的requestCode ?????* @param photoFile 拍照完畢時,圖片保存的位置 ?????*/ ????public?void?openCamera(Activity activity,?int?requestCode, File photoFile) { ????????Intent intent =?new?Intent(MediaStore.ACTION_IMAGE_CAPTURE); ????????intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile)); ????????activity.startActivityForResult(intent, requestCode); ????} ????/** ?????* 本地照片調用 ?????* @param activity ?????* @param requestCode ?????*/ ????public?void?openPhotos(Activity activity,?int?requestCode) { ????????if?(openPhotosNormal(activity, requestCode) && openPhotosBrowser(activity, requestCode) && openPhotosFinally()); ????} ????/** ?????* PopupMenu打開本地相冊. ?????*/ ????private?boolean?openPhotosNormal(Activity activity,?int?actResultCode) { ????????Intent intent =?new?Intent(Intent.ACTION_PICK,?null); ????????intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, ????????????????IMAGE_TYPE); ????????try?{ ????????????activity.startActivityForResult(intent, actResultCode); ????????}?catch?(android.content.ActivityNotFoundException e) { ????????????return?true; ????????} ????????return?false; ????} ????/** ?????* 打開其他的一文件瀏覽器,如果沒有本地相冊的話 ?????*/ ????private?boolean?openPhotosBrowser(Activity activity,?int?requestCode) { ????????Toast.makeText(mContext,?"沒有相冊軟件，運行文件瀏覽器", Toast.LENGTH_LONG).show(); ????????Intent intent =?new?Intent(Intent.ACTION_GET_CONTENT);?// "android.intent.action.GET_CONTENT" ????????intent.setType(IMAGE_TYPE);?// 查看類型 String IMAGE_UNSPECIFIED = ????????????????????????????????????// "image/*"; ????????Intent wrapperIntent = Intent.createChooser(intent,?null); ????????try?{ ????????????activity.startActivityForResult(wrapperIntent, requestCode); ????????}?catch?(android.content.ActivityNotFoundException e1) { ????????????return?true; ????????} ????????return?false; ????} ????/** ?????* 這個是找不到相關的圖片瀏覽器,或者相冊 ?????*/ ????private?boolean?openPhotosFinally() { ????????Toast.makeText(mContext,?"您的系統沒有文件瀏覽器或則相冊支持,請安裝！", Toast.LENGTH_LONG).show(); ????????return?false; ????} ????/** ?????* 獲取從本地圖庫返回來的時候的URI解析出來的文件路徑 ?????* @return ?????*/ ????public?static?String getPhotoPathByLocalUri(Context context, Intent data) { ????????Uri selectedImage = data.getData(); ????????String[] filePathColumn = { MediaStore.Images.Media.DATA }; ????????Cursor cursor = context.getContentResolver().query(selectedImage, ????????????????filePathColumn,?null,?null,?null); ????????cursor.moveToFirst(); ????????int?columnIndex = cursor.getColumnIndex(filePathColumn[0]); ????????String picturePath = cursor.getString(columnIndex); ????????cursor.close(); ????????return?picturePath; ????} }

　　接下來是解決oom的

　　

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package?com.chzh.fitter.util; import?java.io.FileDescriptor; import?java.io.FileInputStream; import?java.io.IOException; import?android.graphics.Bitmap; import?android.graphics.Bitmap.Config; import?android.graphics.BitmapFactory; import?android.graphics.BitmapFactory.Options; import?android.graphics.Canvas; import?android.graphics.Matrix; import?android.graphics.Paint; import?android.graphics.PorterDuff.Mode; import?android.graphics.PorterDuffXfermode; import?android.graphics.Rect; import?android.graphics.RectF; import?android.media.ExifInterface; import?android.net.Uri; import?android.util.Log; import?android.widget.ImageView; import?com.androidquery.util.AQUtility; /** ?* @author jarrahwu ?* ?*/ public?class?ImageUtil { ????/** ?????* Utility method for downsampling images. ?????* ?????* @param path ?????*??????????? the file path ?????* @param data ?????*??????????? if file path is null, provide the image data directly ?????* @param target ?????*??????????? the target dimension ?????* @param isWidth ?????*??????????? use width as target, otherwise use the higher value of height ?????*??????????? or width ?????* @param round ?????*??????????? corner radius ?????* @return the resized image ?????*/ ????public?static?Bitmap getResizedImage(String path,?byte[] data,?int?target, ????????????boolean?isWidth,?int?round) { ????????Options options =?null; ????????if?(target >?0) { ????????????Options info =?new?Options(); ????????????info.inJustDecodeBounds =?true; ????????????//設置這兩個屬性可以減少內存損耗 ????????????info.inInputShareable =?true; ????????????info.inPurgeable =?true; ????????????decode(path, data, info); ????????????int?dim = info.outWidth; ????????????if?(!isWidth) ????????????????dim = Math.max(dim, info.outHeight); ????????????int?ssize = sampleSize(dim, target); ????????????options =?new?Options(); ????????????options.inSampleSize = ssize; ????????} ????????Bitmap bm =?null; ????????try?{ ????????????bm = decode(path, data, options); ????????}?catch?(OutOfMemoryError e) { ????????????L.red(e.toString()); ????????????e.printStackTrace(); ????????} ????????if?(round >?0) { ????????????bm = getRoundedCornerBitmap(bm, round); ????????} ????????return?bm; ????} ????private?static?Bitmap decode(String path,?byte[] data, ????????????BitmapFactory.Options options) { ????????Bitmap result =?null; ????????if?(path !=?null) { ????????????result = decodeFile(path, options); ????????}?else?if?(data !=?null) { ????????????// AQUtility.debug("decoding byte[]"); ????????????result = BitmapFactory.decodeByteArray(data,?0, data.length, ????????????????????options); ????????} ????????if?(result ==?null?&& options !=?null?&& !options.inJustDecodeBounds) { ????????????AQUtility.debug("decode image failed", path); ????????} ????????return?result; ????} ????private?static?Bitmap decodeFile(String path, BitmapFactory.Options options) { ????????Bitmap result =?null; ????????if?(options ==?null) { ????????????options =?new?Options(); ????????} ????????options.inInputShareable =?true; ????????options.inPurgeable =?true; ????????FileInputStream fis =?null; ????????try?{ ????????????fis =?new?FileInputStream(path); ????????????FileDescriptor fd = fis.getFD(); ????????????// AQUtility.debug("decoding file"); ????????????// AQUtility.time("decode file"); ????????????result = BitmapFactory.decodeFileDescriptor(fd,?null, options); ????????????// AQUtility.timeEnd("decode file", 0); ????????}?catch?(IOException e) { ????????????Log.error("TAG",e.toString()) ????????}?finally?{ ????????????fis.close() ????????} ????????return?result; ????} ????private?static?int?sampleSize(int?width,?int?target) { ????????int?result =?1; ????????for?(int?i =?0; i <?10; i++) { ????????????if?(width < target *?2) { ????????????????break; ????????????} ????????????width = width /?2; ????????????result = result *?2; ????????} ????????return?result; ????} ????/** ?????* 獲取圓角的bitmap ?????* @param bitmap ?????* @param pixels ?????* @return ?????*/ ????private?static?Bitmap getRoundedCornerBitmap(Bitmap bitmap,?int?pixels) { ????????Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), ????????????????bitmap.getHeight(), Config.ARGB_8888); ????????Canvas canvas =?new?Canvas(output); ????????final?int?color =?0xff424242; ????????final?Paint paint =?new?Paint(); ????????final?Rect rect =?new?Rect(0,?0, bitmap.getWidth(), bitmap.getHeight()); ????????final?RectF rectF =?new?RectF(rect); ????????final?float?roundPx = pixels; ????????paint.setAntiAlias(true); ????????canvas.drawARGB(0,?0,?0,?0); ????????paint.setColor(color); ????????canvas.drawRoundRect(rectF, roundPx, roundPx, paint); ????????paint.setXfermode(new?PorterDuffXfermode(Mode.SRC_IN)); ????????canvas.drawBitmap(bitmap, rect, rect, paint); ????????return?output; ????} ????/** ?????* auto fix the imageOrientation ?????* @param bm source ?????* @param iv imageView? if set invloke it's setImageBitmap() otherwise do nothing ?????* @param uri image Uri if null user path ?????* @param path image path if null use uri ?????*/ ????public?static?Bitmap autoFixOrientation(Bitmap bm, ImageView iv, Uri uri,String path) { ????????int?deg =?0; ????????try?{ ????????????ExifInterface exif =?null; ????????????if?(uri ==?null) { ????????????????exif =?new?ExifInterface(path); ????????????} ????????????else?if?(path ==?null) { ????????????????exif =?new?ExifInterface(uri.getPath()); ????????????} ????????????if?(exif ==?null) { ????????????????Log.error("TAG","exif is null check your uri or path"); ????????????????return?bm; ????????????} ????????????String rotate = exif.getAttribute(ExifInterface.TAG_ORIENTATION); ????????????int?rotateValue = Integer.parseInt(rotate); ????????????System.out.println("orientetion : "?+ rotateValue); ????????????switch?(rotateValue) { ????????????case?ExifInterface.ORIENTATION_ROTATE_90: ????????????????deg =?90; ????????????????break; ????????????case?ExifInterface.ORIENTATION_ROTATE_180: ????????????????deg =?180; ????????????????break; ????????????case?ExifInterface.ORIENTATION_ROTATE_270: ????????????????deg =?270; ????????????????break; ????????????default: ????????????????deg =?0; ????????????????break; ????????????} ????????}?catch?(Exception ee) { ????????????Log.d("catch img error",?"return"); ????????????if(iv !=?null) ????????????iv.setImageBitmap(bm); ????????????return?bm; ????????} ????????Matrix m =?new?Matrix(); ????????m.preRotate(deg); ????????bm = Bitmap.createBitmap(bm,?0,?0, bm.getWidth(), bm.getHeight(), m,?true); ????????//bm = Compress(bm, 75); ????????if(iv !=?null) ????????????iv.setImageBitmap(bm); ????????return?bm; ????} }

　　

　　如果想要代碼Demo的話,可以留言.有什么坑爹的地方,多多拍磚..over.

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