使用intent调用系统照相机拍照

古城微笑少年丶 2022-09-26 01:57 156阅读 0赞

1.使用intent调用系统照相机拍照

static final int REQUEST_IMAGE_CAPTURE = 1;
    
    private void dispatchTakePictureIntent() {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
            startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
        }
    }

2.获取所拍照片并显示

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            if (intent.resolveActivity(getPackageManager()) != null){
                File photoFile = null;
                try {
                    photoFile = createImageFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (photoFile != null){
                    Uri uri = Uri.fromFile(photoFile);
                    intent.putExtra(MediaStore.EXTRA_OUTPUT,uri);
                    startActivityForResult(intent,1);
                }
    
            }

3.创建为所拍照片储存的临时文件夹

String mCurrentPhotoPath;
    
    private File createImageFile() throws IOException {
        // Create an image file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        String imageFileName = "JPEG_" + timeStamp + "_";
        File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);//由getExternalFilesDir(),以及getFilesDir()创建的目录，应用卸载后会被删除！
    
        File image = File.createTempFile(
            imageFileName,  /* prefix */
            ".jpg",         /* suffix */
            storageDir      /* directory */
        );
    
        // Save a file: path for use with ACTION_VIEW intents
        mCurrentPhotoPath = "file:" + image.getAbsolutePath();
        return image;
    }

4.把所拍图片显示在系统图库

@Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            if (requestCode == 1){
                Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                File file = new File(current_photo_path);
                Uri uri = Uri.fromFile(file);
                intent.setData(uri);
                sendBroadcast(intent);
            }
        }

5.设置权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
        <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    
        <uses-feature android:name="android.hardware.camera"
            android:required="true" />

PS: [参考][Link 1]

[Link 1]: https://developer.android.com/training/camera/photobasics.html#TaskScalePhoto