标签：android des blog class code java
在android开发中, 在一些编辑个人信息的时候,经常会有头像这么一个东西,就两个方面,调用系统相机拍照,调用系统图库获取图片.但是往往会遇到各种问题:
1.oom
2.图片方向不对
3.activity result 的时候data == null
4.调用图库的时候没找到软件
嘿嘿..开代码:
首先是调用系统拍照,和图库的代码
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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方法中根据requestCode和resultCode来获取当前拍照的图片地址。//注意：这里有个问题，在有些机型当中（如SamsungI939、note2等）遇见了当拍照并存储之后，intent当中得到的data为空：/** * data = null 的情况主要是由于拍照的时候横屏了,导致重新create, 普通的解决方法可以在sharedpreference里面保存拍照文件的路径(onSaveInstance保存), * 在onRestoreSaveInstance里面在获取出来. * 最简单的可以用fileUtil 里面的一个静态变量保存起来.. * */public
class CameraUtil { private
static final String IMAGE_TYPE = "image/*"; private
Context mContext; public
CameraUtil(Context context) { mContext = context; } /** * 打开照相机 * @param activity 当前的activity * @param requestCode 拍照成功时activity forResult 的时候的requestCode * @param photoFile 拍照完毕时,图片保存的位置 */ 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); } /** * 本地照片调用 * @param activity * @param requestCode */ public
void openPhotos(Activity activity, int
requestCode) { if
(openPhotosNormal(activity, requestCode) && openPhotosBrowser(activity, requestCode) && openPhotosFinally()); } /** * PopupMenu打开本地相册. */ 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; } /** * 打开其他的一文件浏览器,如果没有本地相册的话 */ private
boolean openPhotosBrowser(Activity activity, int
requestCode) { Toast.makeText(mContext, "没有相册软件，运行文件浏览器", Toast.LENGTH_LONG).show(); Intent intent = new
Intent(Intent.ACTION_GET_CONTENT); // "android.intent.action.GET_CONTENT" intent.setType(IMAGE_TYPE); // 查看类型 String IMAGE_UNSPECIFIED = // "image/*"; Intent wrapperIntent = Intent.createChooser(intent, null); try
{ activity.startActivityForResult(wrapperIntent, requestCode); } catch
(android.content.ActivityNotFoundException e1) { return
true; } return
false; } /** * 这个是找不到相关的图片浏览器,或者相册 */ private
boolean openPhotosFinally() { Toast.makeText(mContext, "您的系统没有文件浏览器或则相册支持,请安装！", Toast.LENGTH_LONG).show(); return
false; } /** * 获取从本地图库返回来的时候的URI解析出来的文件路径 * @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; }} |
接下来是解决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; //设置这两个属性可以减少内存损耗 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) { AQUtility.report(e); } finally
{ AQUtility.close(fis); } 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; } /** * 获取圆角的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) { L.red("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; }} |
这两个东西,是解决这些问题的利器.
如果想要代码Demo的话,可以留言.有什么坑爹的地方,多多拍砖..over.
一站式解决,Android 拍照 图库的各种问题.,布布扣,bubuko.com
标签：android des blog class code java
原文地址：http://www.cnblogs.com/jarrah/p/3726079.html
