Android开发之在Fragment和Activity页面拍照需要注意的地方

其他 2021-12-14 06:46:36 阅读次数: 0

先贴出Google官方文档：Google官方拍照文档

感觉讲的不是很细，有不少坑。

先看需要配置权限和provider

  <!--拍照存储权限-->
    <uses-permission
        android:name="android.permission.WRITE_EXTERNAL_STORAGE"
        tools:ignore="ScopedStorage" />
    <!--拍照权限-->
    <uses-permission android:name="android.permission.CAMERA" />
 <!--拍照需要配置provider为了兼容Android 7.0 下面的authorities里面的值需要和拍照里面的provider一样，下面这段代码
        Uri photoUri = FileProvider.getUriForFile(activity, activity.getPackageName() + ".xiayiye5", photoFile);
        -->
        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${applicationId}.xiayiye5"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths">

            </meta-data>
        </provider>

再看下file_path文件如何写的

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <!--    配置拍照图片存储路径为: 包名/files/Pictures-->
    <external-path
        name="my_images"
        path="Android/data/cn.xiayiye5.xiayiye5library/files/Pictures" />
</paths>

当然还有一个万能路径写法待研究：感谢此博主：万能路径写法

<paths xmlns:android="http://schemas.android.com/apk/res/android">
   <external-path
    name="external"
    path="." />
  <external-files-path
    name="external_files"
    path="." />
  <cache-path
    name="cache"
    path="." />
  <external-cache-path
    name="external_cache"
    path="." />
  <files-path
    name="files"
    path="." />
</paths>
————————————————
版权声明：本文为CSDN博主「Huc_Boy」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/liu_xueping/article/details/103980700

好了activity页面开始拍照了

public void dispatchTakePictureIntent(Activity activity) {
        if (PackageManager.PERMISSION_GRANTED == ContextCompat.checkSelfPermission(activity, android.Manifest.permission.CAMERA)) {
            //拍照方法
            Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            if (takePictureIntent.resolveActivity(activity.getPackageManager()) != null) {
                File photoFile = null;
                try {
                    photoFile = createImageFile(activity);
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
                if (photoFile != null) {
                    Uri photoUri = FileProvider.getUriForFile(activity, activity.getPackageName() + ".xiayiye5", photoFile);
                    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
                    activity.startActivityForResult(takePictureIntent, TakePhotoActivity.REQUEST_IMAGE_CAPTURE);
                }
            }
        } else {
            //提示用户开户权限   拍照和读写sd卡权限
            String[] perms = {Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA};
            ActivityCompat.requestPermissions(activity, perms, 10010);
        }
    }

再看下activity页面回调

 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
            //拍照后的图片回调
            DisplayMetrics dm = new DisplayMetrics();
            getWindowManager().getDefaultDisplay().getMetrics(dm);
            int screenWidth = dm.widthPixels;
            Bitmap decodeFile = BitmapFactory.decodeFile(TakePhotoUtils.getInstance().getImgPath());
            int width = decodeFile.getWidth();
            int size = width / screenWidth;
            BitmapFactory.Options newOpts = new BitmapFactory.Options();
            newOpts.inJustDecodeBounds = false;
            //设置缩放比例
            newOpts.inSampleSize = size * 2;
            Log.e("打印缩放比例", size + "");
            //重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
            Bitmap bitmap = BitmapFactory.decodeFile(TakePhotoUtils.getInstance().getImgPath(), newOpts);
            ivTakePhoto.setImageBitmap(bitmap);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == 10010) {
            boolean cameraAccepted = grantResults[0] == PackageManager.PERMISSION_GRANTED;
            if (cameraAccepted) {
                //权限申请成功
                Toast.makeText(this, "activity页面权限申请成功！", Toast.LENGTH_LONG).show();
                // 调用拍照方法
                TakePhotoUtils.getInstance().dispatchTakePictureIntent(this);
            } else {
                //用户授权拒绝之后，友情提示一下就可以了
                Toast.makeText(this, "activity页面请开启应用拍照权限！", Toast.LENGTH_LONG).show();
            }
        }
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }

再看下在fragment中拍照只需要注意两点

看下在fragment中拍照的方法

public void dispatchTakePictureIntent(Fragment fragment) {
        if (PackageManager.PERMISSION_GRANTED == ContextCompat.checkSelfPermission(fragment.getContext(), android.Manifest.permission.CAMERA)) {
            //拍照方法
            Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            if (takePictureIntent.resolveActivity(fragment.requireActivity().getPackageManager()) != null) {
                File photoFile = null;
                try {
                    photoFile = createImageFile(fragment.requireActivity());
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
                if (photoFile != null) {
                    Uri photoUri = FileProvider.getUriForFile(fragment.requireActivity(), fragment.requireActivity().getPackageName() + ".xiayiye5", photoFile);
                    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
                    //在fragment页面拍照需要使用fragment中的startActivityForResult，不然不会走fragment中的回调
                    fragment.startActivityForResult(takePictureIntent, TakePhotoActivity.REQUEST_IMAGE_CAPTURE);
                }
            }
        } else {
            //提示用户开户权限   拍照和读写sd卡权限
            String[] perms = {Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA};
            //在fragment中申请权限时候需要使用fragment中的requestPermissions方法不然不会走fragment中的回调
            fragment.requestPermissions(perms, 10010);
        }
    }

再看下在fragment中的回调

 @Override
    public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
//        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == TakePhotoActivity.REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
            //在fragment中拍照后的回调
            DisplayMetrics dm = new DisplayMetrics();
            requireActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);
            int screenWidth = dm.widthPixels;
            Bitmap decodeFile = BitmapFactory.decodeFile(TakePhotoUtils.getInstance().getImgPath());
            int width = decodeFile.getWidth();
            int size = width / screenWidth;
            BitmapFactory.Options newOpts = new BitmapFactory.Options();
            newOpts.inJustDecodeBounds = false;
            //设置缩放比例
            newOpts.inSampleSize = size * 2;
            Log.e("打印缩放比例", size + "");
            //重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
            Bitmap bitmap = BitmapFactory.decodeFile(TakePhotoUtils.getInstance().getImgPath(), newOpts);
            ivTakePhoto.setImageBitmap(bitmap);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        //在fragment中申请权限后的回调
        if (requestCode == 10010) {
            boolean cameraAccepted = grantResults[0] == PackageManager.PERMISSION_GRANTED;
            if (cameraAccepted) {
                //权限申请成功
                Toast.makeText(requireActivity(), "fragment页面权限申请成功！", Toast.LENGTH_LONG).show();
                // 调用拍照方法
                TakePhotoUtils.getInstance().dispatchTakePictureIntent(this);
            } else {
                //用户授权拒绝之后，友情提示一下就可以了
                Toast.makeText(requireActivity(), "fragment页面请开启应用拍照权限！", Toast.LENGTH_LONG).show();
            }
        }
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }

Activity拍照源码:activity拍照

Fragment拍照源码：fragment拍照

拍照工具类源码：拍照工具类

猜你喜欢

转载自blog.csdn.net/xiayiye5/article/details/117740326
今日推荐
Arc Browser for Windows 1.0 正式 GA
90后程序员开发视频搬运软件、不到一年获利超 700 万，结局很刑！
《美国对全球网络空间安全与发展的威胁和破坏》报告发布
火速冲上 GitHub 热榜 —— 开源编程语言、框架哪有这么可爱？
北京人形机器人创新中心发布全球首个纯电驱拟人奔跑的全尺寸人形机器人“天工”
周排行
rbac——界面、权限
Apache CXF + SpringMVC 整合发布WebService
so插件化
Vue.js实战系列---图标字体制作（svg格式）
PAT乙级 1007 素数对猜想(孪生素数对) (20分) ---（C语言 + 详细注释）
被IRM保护的文档，打开失败
Calendar和Date计算日期差的小问题
win10子系统ubuntu18.4安装docker
利用Wrap Shell Script定位Android Native内存泄漏
MySQL: Transaction (Part I - Basic Concept)
每日归档
更多
2024-05-03(19)
2024-05-02(0)
2024-05-01(4)
2024-04-30(1)
2024-04-29(40)
2024-04-28(0)
2024-04-27(56)
2024-04-26(39)
2024-04-25(22)
2024-04-24(36)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022