Android 实现拍照,选择图片并剪切保存

来源:互联网 发布:h5四川麻将源码 编辑:程序博客网 时间:2024/05/10 09:35

项目中有一个实现图片的剪切功能和APP“酷站”的点击中间“+”字符,进行图片选择到最后剪切功能;“微信”选择图片并剪切类似 ,由于测试的模拟器中没有图片,所以把参考资料上图片截下来展示下:

查了一些参考资料,使用的而并不是Android系统的图片剪切方法,而是UCrop库的封装,或自定义的高仿微信图片剪切:(请详细参考资料)

http://www.jb51.net/article/84434.htm

http://blog.csdn.net/fuchaosz/article/details/51202264

http://blog.csdn.net/liutaoblog/article/details/52452410

http://blog.csdn.net/maosidiaoxian/article/details/50828664

http://www.androidchina.net/4314.html

选择框实现:

xml布局:

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:orientation="vertical">    <LinearLayout android:id="@+id/pop_layout" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:background="#444" android:gravity="center_horizontal" android:orientation="vertical">    <Button android:id="@+id/picture_selector_take_photo_btn" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="10dip" android:layout_marginRight="10dip" android:layout_marginTop="10dp" android:background="#4d69ff" android:padding="10dp" android:text="拍照" android:textColor="#CEC9E7" android:textSize="18sp" android:textStyle="bold" />    <Button android:id="@+id/picture_selector_pick_picture_btn" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="10dip" android:layout_marginRight="10dip" android:layout_marginTop="5dp" android:background="#4d69ff" android:padding="10dp" android:text="从相册选择" android:textColor="#CEC9E7" android:textSize="18sp" android:textStyle="bold" />    <Button android:id="@+id/picture_selector_cancel_btn" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginBottom="15dip" android:layout_marginLeft="10dip" android:layout_marginRight="10dip" android:layout_marginTop="20dp" android:background="@android:color/white" android:padding="10dp" android:text="取消" android:textColor="#373447" android:textSize="18sp" android:textStyle="bold" />  </LinearLayout>   </RelativeLayout> 

代码片段:

public SelectPicturePopupWindow(Context context) {  super(context);  LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  mMenuView = inflater.inflate(R.layout.layout_picture_selector, null);  takePhotoBtn = (Button) mMenuView.findViewById(R.id.picture_selector_take_photo_btn);  pickPictureBtn = (Button) mMenuView.findViewById(R.id.picture_selector_pick_picture_btn);  cancelBtn = (Button) mMenuView.findViewById(R.id.picture_selector_cancel_btn);  // 设置按钮监听  takePhotoBtn.setOnClickListener(this);  pickPictureBtn.setOnClickListener(this);  cancelBtn.setOnClickListener(this); }
创建SelectPicturePopupWindow的时候设置按钮的监听。这里编写一个选择监听接口:

/**  * 选择监听接口  */public interface OnSelectedListener {  void OnSelected(View v, int position); } 
回调的参数为点击的按钮View以及当前按钮的索引,那么只要在选择监听里面返回接口的回调就可以啦。

@Overridepublic void onClick(View v) {  switch (v.getId()) {  case R.id.picture_selector_take_photo_btn:  if(null != mOnSelectedListener) {  mOnSelectedListener.OnSelected(v, 0);  }  break;  case R.id.picture_selector_pick_picture_btn:  if(null != mOnSelectedListener) {  mOnSelectedListener.OnSelected(v, 1);  }  break;  case R.id.picture_selector_cancel_btn:  if(null != mOnSelectedListener) {  mOnSelectedListener.OnSelected(v, 2);  }  break;  } } 
PopupWindow的初始化创建、监听设置好之后,只要提供显示与隐藏两个方法就可以了。
/**  * 把一个View控件添加到PopupWindow上并且显示  *  * @param activity  */public void showPopupWindow(Activity activity) {  popupWindow = new PopupWindow(mMenuView, // 添加到popupWindow  ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);  popupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));  popupWindow.showAtLocation(activity.getWindow().getDecorView(), Gravity.CENTER | Gravity.BOTTOM, 0, 0);  popupWindow.setAnimationStyle(android.R.style.Animation_InputMethod); // 设置窗口显示的动画效果  popupWindow.setFocusable(false); // 点击其他地方隐藏键盘 popupWindow  popupWindow.update(); } 
/**  * 移除PopupWindow  */public void dismissPopupWindow() {  if (popupWindow != null && popupWindow.isShowing()) {  popupWindow.dismiss();  popupWindow = null;  } }

使用选择框

通过我们上面对选择框的封装,使用起来就比较简单了,只需要初始化及设置选择的监听就可以啦。

初始化选择框:

mSelectPicturePopupWindow = new SelectPicturePopupWindow(mContext); mSelectPicturePopupWindow.setOnSelectedListener(this); 
设置选择框的监听:

@Overridepublic void OnSelected(View v, int position) {  switch (position) {  case 0:  // TODO: "拍照"按钮被点击了  break;  case 1:  // TODO: "从相册选择"按钮被点击了  break;  case 2:  // TODO: "取消"按钮被点击了  break;  } } 
然后在Fragment上进行封装,我们取名为PictureSelectFragment。

拍照并保存图片

调用系统的拍照,并把拍摄的图片保存到指定位置。

@Overridepublic void OnSelected(View v, int position) {  switch (position) {  case 0:  // "拍照"按钮被点击了  mSelectPicturePopupWindow.dismissPopupWindow();  Intent takeIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  //下面这句指定调用相机拍照后的照片存储的路径  takeIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(mTempPhotoPath)));  startActivityForResult(takeIntent, CAMERA_REQUEST_CODE);  break;  case 1:  // TODO: "从相册选择"按钮被点击了  break;  case 2:  // TODO: "取消"按钮被点击了  break;  } } 

这里的指定位置为sd卡本目录下
mTempPhotoPath = Environment.getExternalStorageDirectory() + File.separator + "photo.jpeg"; 

当拍摄照片完成时会回调到onActivityResult,我们在这里处理图片的裁剪就可以了。

@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data) {  if (resultCode == mActivity.RESULT_OK) {  switch (requestCode) {  case CAMERA_REQUEST_CODE:  // TODO: 调用相机拍照  break;  }  }  super.onActivityResult(requestCode, resultCode, data); } 

相册选择图片

调用系统的选择图片

@Overridepublic void OnSelected(View v, int position) {  switch (position) {  case 0:  // "拍照"按钮被点击了  mSelectPicturePopupWindow.dismissPopupWindow();  Intent takeIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  // 下面这句指定调用相机拍照后的照片存储的路径  takeIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(mTempPhotoPath)));  startActivityForResult(takeIntent, CAMERA_REQUEST_CODE);  break;  case 1:  // "从相册选择"按钮被点击了  mSelectPicturePopupWindow.dismissPopupWindow();  Intent pickIntent = new Intent(Intent.ACTION_PICK, null);  // 如果限制上传到服务器的图片类型时可以直接写如:"image/jpeg 、 image/png等的类型"  pickIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");  startActivityForResult(pickIntent, GALLERY_REQUEST_CODE);  break;  case 2:  // TODO: "取消"按钮被点击了  break;  } } 
当拍选择图片完成时会回调到onActivityResult,在这里处理选择的返回结果

@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data) {  if (resultCode == mActivity.RESULT_OK) {  switch (requestCode) {  case CAMERA_REQUEST_CODE:  // TODO: 调用相机拍照  break;  case GALLERY_REQUEST_CODE:  // TODO: 直接从相册获取  break;  }  }  super.onActivityResult(requestCode, resultCode, data); } 
使用Crop裁剪图片

裁剪图片,这里设置宽高比为1:1,最大尺寸为512*512,当然可以根据自己的需求来设置。

/**  * 裁剪图片方法实现  *  * @param uri  */public void startCropActivity(Uri uri) {  UCrop.of(uri, mDestinationUri)  .withAspectRatio(1, 1)  .withMaxResultSize(512, 512)  .withTargetActivity(CropActivity.class)  .start(mActivity, this); } 
当然,这里的比例你也可以设置成其他的,3:4  ,4:3 等等
CropActiivty裁剪完成时会回调到onActivityResult,在这里处理选择的返回结果。

@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data) {  if (resultCode == mActivity.RESULT_OK) {  switch (requestCode) {  case CAMERA_REQUEST_CODE: // 调用相机拍照  File temp = new File(mTempPhotoPath);  startCropActivity(Uri.fromFile(temp));  break;  case GALLERY_REQUEST_CODE: // 直接从相册获取  startCropActivity(data.getData());  break;  case UCrop.REQUEST_CROP:  // TODO: 裁剪图片结果  break;  case UCrop.RESULT_ERROR:  // TODO: 裁剪图片错误  break;  }  }  super.onActivityResult(requestCode, resultCode, data); } 
CropActivity的界面如下所示:



当然也可以轻松设计成如下两图:



xml布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:fab="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:clipToPadding="true" android:fitsSystemWindows="true">    <include layout="@layout/toolbar_layout" />    <FrameLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/toolbar" android:background="#000">    <com.kevin.crop.view.UCropView android:id="@+id/weixin_act_ucrop" android:layout_width="match_parent" android:layout_height="match_parent" android:visibility="invisible" />    </FrameLayout>    <android.support.design.widget.CoordinatorLayout android:layout_width="match_parent" android:layout_height="match_parent">    <android.support.design.widget.FloatingActionButton android:id="@+id/crop_act_save_fab" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="bottom|right" android:layout_margin="@dimen/fab_margin" android:src="@mipmap/ic_done_white" fab:fabSize="normal" />  </android.support.design.widget.CoordinatorLayout>     </RelativeLayout> 

可以发现非常简单,只有一个主要的CropView,这就是uCrop框架为我们提供的

代码片段:

@Overrideprotected void initViews() {  initToolBar();    mGestureCropImageView = mUCropView.getCropImageView();  mOverlayView = mUCropView.getOverlayView();    // 设置允许缩放  mGestureCropImageView.setScaleEnabled(true);  // 设置禁止旋转  mGestureCropImageView.setRotateEnabled(false);  // 设置外部阴影颜色  mOverlayView.setDimmedColor(Color.parseColor("#AA000000"));  // 设置周围阴影是否为椭圆(如果false则为矩形)  mOverlayView.setOvalDimmedLayer(false);  // 设置显示裁剪边框  mOverlayView.setShowCropFrame(true);  // 设置不显示裁剪网格  mOverlayView.setShowCropGrid(false);    final Intent intent = getIntent();  setImageData(intent); } 

private void setImageData(Intent intent) {  Uri inputUri = intent.getParcelableExtra(UCrop.EXTRA_INPUT_URI);  mOutputUri = intent.getParcelableExtra(UCrop.EXTRA_OUTPUT_URI);    if (inputUri != null && mOutputUri != null) {  try {  mGestureCropImageView.setImageUri(inputUri);  } catch (Exception e) {  setResultException(e);  finish();  }  } else {  setResultException(new NullPointerException("Both input and output Uri must be specified"));  finish();  }    // 设置裁剪宽高比  if (intent.getBooleanExtra(UCrop.EXTRA_ASPECT_RATIO_SET, false)) {  float aspectRatioX = intent.getFloatExtra(UCrop.EXTRA_ASPECT_RATIO_X, 0);  float aspectRatioY = intent.getFloatExtra(UCrop.EXTRA_ASPECT_RATIO_Y, 0);    if (aspectRatioX > 0 && aspectRatioY > 0) {  mGestureCropImageView.setTargetAspectRatio(aspectRatioX / aspectRatioY);  } else {  mGestureCropImageView.setTargetAspectRatio(CropImageView.SOURCE_IMAGE_ASPECT_RATIO);  }  }    // 设置裁剪的最大宽高  if (intent.getBooleanExtra(UCrop.EXTRA_MAX_SIZE_SET, false)) {  int maxSizeX = intent.getIntExtra(UCrop.EXTRA_MAX_SIZE_X, 0);  int maxSizeY = intent.getIntExtra(UCrop.EXTRA_MAX_SIZE_Y, 0);    if (maxSizeX > 0 && maxSizeY > 0) {  mGestureCropImageView.setMaxResultImageSizeX(maxSizeX);  mGestureCropImageView.setMaxResultImageSizeY(maxSizeY);  } else {  Log.w(TAG, "EXTRA_MAX_SIZE_X and EXTRA_MAX_SIZE_Y must be greater than 0");  }  } } 
以上为CropView的配置,更多配置请参考项目源码。

最重要的,裁剪保存图片:

private void cropAndSaveImage() {  OutputStream outputStream = null;  try {  final Bitmap croppedBitmap = mGestureCropImageView.cropImage();  if (croppedBitmap != null) {  outputStream = getContentResolver().openOutputStream(mOutputUri);  croppedBitmap.compress(Bitmap.CompressFormat.JPEG, 85, outputStream);  croppedBitmap.recycle();    setResultUri(mOutputUri, mGestureCropImageView.getTargetAspectRatio());  finish();  } else {  setResultException(new NullPointerException("CropImageView.cropImage() returned null."));  }  } catch (Exception e) {  setResultException(e);  finish();  } finally {  BitmapLoadUtils.close(outputStream);  } } 
处理裁剪失败的返回值

/**  * 处理剪切失败的返回值  *  * @param result  */private void handleCropError(Intent result) {  deleteTempPhotoFile();  final Throwable cropError = UCrop.getError(result);  if (cropError != null) {  Log.e(TAG, "handleCropError: ", cropError);  Toast.makeText(mContext, cropError.getMessage(), Toast.LENGTH_LONG).show();  } else {  Toast.makeText(mContext, "无法剪切选择图片", Toast.LENGTH_SHORT).show();  } } 
这里设置了选择的回调接口,便于封装抽取。

/**  * 图片选择的回调接口  */public interface OnPictureSelectedListener {  /**  * 图片选择的监听回调  *  * @param fileUri  * @param bitmap  */ void onPictureSelected(Uri fileUri, Bitmap bitmap); } 
我们的PictureSelectFragment就搞定了,在使用的时候只要继承它,几行代码就搞定了。

PictureSelectFragment使用

// 设置图片点击监听 mPictureIv.setOnClickListener(new View.OnClickListener() {  @Override public void onClick(View v) {  selectPicture();  } }); 

// 设置裁剪图片结果监听 setOnPictureSelectedListener(new OnPictureSelectedListener() {  @Override public void onPictureSelected(Uri fileUri, Bitmap bitmap) {  mPictureIv.setImageBitmap(bitmap);    String filePath = fileUri.getEncodedPath();  String imagePath = Uri.decode(filePath);  Toast.makeText(mContext, "图片已经保存到:" + imagePath, Toast.LENGTH_LONG).show();  } }); 

源码:http://download.csdn.net/download/lijinweii/9945010

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