使用intent调用系统照相机拍照

最新推荐文章于 2021-06-25 09:13:40 发布

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#camera intent

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本文介绍如何使用Intent在Android应用中调用系统相机进行拍照，并存储所拍摄的照片。

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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