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
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
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) {
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;
} /**
* 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) {
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;
} }
如果想要代码Demo的话,可以留言.有什么坑爹的地方,多多拍砖..over.