需求是这样的：打开系统或者第三方相机app拍照，然后使用所拍照片进行处理，或者直接调用系统或者第三方相册app，选择图片返回使用。需求很简单，过程很蛋疼，网上有很多方法，不过有很多不好用的地方，最后使用的这种方式还不错，记录一下，还是那句话，我很懒，以后复制使用直接复制代码：
1.调用相机拍照返回所拍照片(不是缩略图)，点击按钮，调用相机：
Intent intent = new Intent(); intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE); File file = new File(getExternalFilesDir(Environment.DIRECTORY_DCIM) +"/bidata"); if (!file.exists()) { file.mkdirs(); } intent.putExtra(MediaStore.Images.Media.ORIENTATION, 0); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(file, "cameraTmp.png"))); startActivityForResult(intent, 0); 获取所得照片： @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (resultCode == RESULT_OK) { switch (requestCode) { case 0: Bitmap bitmap = CommonUtils.getBitmap(this, getExternalFilesDir(Environment.DIRECTORY_DCIM) + "/bidata/"+ "cameraTmp.png"); break; } super.onActivityResult(requestCode, resultCode, data); } 2.调用相册获取图片 Intent picture = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); startActivityForResult(picture, 1); 获取所得到的图片： @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (resultCode == RESULT_OK) { switch (requestCode) { case 1: CommonUtils.bitmap = BitmapFactory.decodeFile(CommonUtils.getRealFilePath(this, data.getData())); break; } } super.onActivityResult(requestCode, resultCode, data); } 最后把两个加载bitmap的方法贴出来： /** * 由string类型的路径加载图片 * * @param context * @param path * @return */ public static Bitmap getBitmap(Context context, String path) { Uri uri = Uri.fromFile(new File(path)); InputStream in = null; try { in = context.getContentResolver().openInputStream(uri); // Decode image size BitmapFactory.Options o = new BitmapFactory.Options(); o.inJustDecodeBounds = true; BitmapFactory.decodeStream(in, null, o); in.close(); int scale = 1; if (o.outHeight > 1024 || o.outWidth > 1024) { scale = (int) Math.pow( 2, (int) Math.round(Math.log(1024 / (double) Math.max( o.outHeight, o.outWidth)) / Math.log(0.5))); } if (scale < 4) { scale = 4; } BitmapFactory.Options o2 = new BitmapFactory.Options(); o2.inSampleSize = scale; in = context.getContentResolver().openInputStream(uri); Bitmap b = BitmapFactory.decodeStream(in, null, o2); in.close(); return b; } catch (FileNotFoundException e) { } catch (IOException e) { } return null; } /** * 将图片的uri转为绝对路径 * * @param context * @param uri * @return */ public static String getRealFilePath(final Context context, final Uri uri) { if (null == uri) return null; final String scheme = uri.getScheme(); String data = null; if (scheme == null) data = uri.getPath(); else if (ContentResolver.SCHEME_FILE.equals(scheme)) { data = uri.getPath(); } else if (ContentResolver.SCHEME_CONTENT.equals(scheme)) { Cursor cursor = context.getContentResolver().query(uri, new String[]{MediaStore.Images.ImageColumns.DATA}, null, null, null); if (null != cursor) { if (cursor.moveToFirst()) { int index = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA); if (index > -1) { data = cursor.getString(index); } } cursor.close(); } } return data; } 也 希望对有需要的战友有帮助。。。。
