ChoosePicTest

第一行代码的拍照和选择图库照片，有改动

演示

20160824_163601.gif

笔记

点击拍照

1. 创建file存储图片
   <pre>
   File outImage = new File(Environment.getExternalStorageDirectory(),"tempImg.png");
   </pre>

2. 根据之前的路径，创建一个空文件
   <pre>
   outImage.createNewFile(); </pre>

3. 将file文件转换成Uri—— 形式：file://
   <pre>
   imageUri = Uri.fromFile(outImage);</pre>

4. 启动相机
   <pre>
   //启动相机程序
   Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
   intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
   startActivityForResult(intent,TAKE_PHOTO);
   </pre>
   或者

5. 打开相册
   <pre>
   Intent intent = new Intent("android.intent.action.GET_CONTENT");
   intent.setType("image/*"); intent.putExtra("crop",true);
   intent.putExtra("scale",true);
   intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
   startActivityForResult(intent,SELECT_PHOTO);
   </pre>

选择图库相片

1,2,3步骤同上

4. 设置intent
   <pre>
   Intent intent = new Intent("android.intent.action.GET_CONTENT");
   intent.setType("image/*");
   intent.putExtra("crop",true);
   intent.putExtra("scale",true); intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri); startActivityForResult(intent,SELECT_PHOTO);
   </pre>

onActivityResult处理——注意两处获取bitmap的方式是不一样的

拍照和裁剪

switch (requestCode){
            case  TAKE_PHOTO:
                if (resultCode == RESULT_OK){
                    Intent intent = new Intent("com.android.camera.action.CROP");
                    intent.setDataAndType(imageUri,"image/*");
                    intent.putExtra("scale",true);
                    intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
                    startActivityForResult(intent,CROP_PHOTO);
                }

               break;

            case  CROP_PHOTO:
                if (resultCode == RESULT_OK) {
                    try {
                        // 把InputStream转换成bitmap
                        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
                        //将裁减后的照片显示出来
                        mImageView.setImageBitmap(bitmap);
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }
                }

                break;

选择并显示

case SELECT_PHOTO:
                ContentResolver resolver = getContentResolver();
                //照片的原始资源地址
                Uri uri = data.getData();
                Log.d(TAG, "onActivityResult: "+uri);

                try {

                    Bitmap photo = MediaStore.Images.Media.getBitmap(resolver,uri);
                    if (photo != null){
                        mImageView.setImageBitmap(photo);
                    }
                }catch (IOException e){
                    e.printStackTrace();
                }