适用于 Android 8.0 及以下全部版本的拍照示例

在res文件夹的xml文件夹中添加filepaths文件

<?xml version="1.0" encoding="utf-8"?>

在Manifest文件中配置provider

其中android:authorities中填写的是你的应用包名

注意要在后面跳转的时候使用

对于Android6.0以下,添加拍照和文件读写权限

代码示例

public class MainActivity extends Activity {    private ImageView mImageView;    private String mPublicPhotoPath;    private static final int REQ_GALLERY = 33;    private static final int REQUEST_CODE_PICK_IMAGE = 22;    private int mWidth;    private int mHeight;    private Uri uri;    private String path;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();    }    private void initView() {        mImageView =  (ImageView) findViewById(R.id.iv);        findViewById(R.id.takePicture).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                //获取拍照的权限                showTakePicture();            }        });        findViewById(R.id.picture).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                //获取相册中的照片                getImageFromAlbum();            }        });    }    //获取拍照的权限    private void showTakePicture() {//        判断手机版本,如果低于6.0 则不用申请权限,直接拍照        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {//7.0及以上            if (ContextCompat.checkSelfPermission(this,                    Manifest.permission.CAMERA)                    != PackageManager.PERMISSION_GRANTED) {                if (ActivityCompat.shouldShowRequestPermissionRationale(this,                        Manifest.permission.CAMERA)) {                } else {                    ActivityCompat.requestPermissions(this,                            new String[]{Manifest.permission.CAMERA,Manifest.permission.WRITE_EXTERNAL_STORAGE,                                    Manifest.permission.READ_EXTERNAL_STORAGE}, 1);                }            }else{                startTake();            }        }else{            startTake();        }    }    //权限申请的回调    @Override    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults);        if (requestCode == 1) {            for (int i = 0; i < permissions.length; i++) {                if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {                    if (i == 0){                         startTake();                    }                } else {                    Toast.makeText(this, "" + "权限" + permissions[i] + "申请失败", Toast.LENGTH_SHORT).show();                }            }        }    }    private void startTake() {        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        //判断是否有相机应用        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {            //创建临时图片文件            File photoFile = null;            try {                photoFile = createPublicImageFile();            } catch (IOException e) {                e.printStackTrace();            }            //设置Action为拍照            if (photoFile != null) {                    takePictureIntent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);                    //这里加入flag                    takePictureIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);                Uri photoURI;                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {//7.0及以上                     photoURI = FileProvider.getUriForFile(this, "com.example.mycamera.fileprovider", photoFile);                }else{                    photoURI = Uri.fromFile(photoFile);                }                    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);                startActivityForResult(takePictureIntent, REQ_GALLERY);            }        }        //将照片添加到相册中        galleryAddPic(mPublicPhotoPath, this);    }    /**     * 获取相册中的图片     */    public void getImageFromAlbum() {        Intent intent = new Intent(Intent.ACTION_PICK);        intent.setType("image/*");//相片类型        startActivityForResult(intent, REQUEST_CODE_PICK_IMAGE);    }    /**     * 创建临时图片文件     * @return     * @throws IOException     */    private File createPublicImageFile() throws IOException {        File path = null;        if (hasSdcard()) {            path = Environment.getExternalStoragePublicDirectory(                    Environment.DIRECTORY_DCIM);        }        Date date = new Date();        String timeStamp = getTime(date, "yyyyMMdd_HHmmss", Locale.CHINA);        String imageFileName = "Camera/" + "IMG_" + timeStamp + ".jpg";        File image = new File(path, imageFileName);        mPublicPhotoPath = image.getAbsolutePath();        return image;    }    /**     * 判断sdcard是否被挂载     * @return     */    public static boolean hasSdcard() {        if (Environment.getExternalStorageState().equals(                Environment.MEDIA_MOUNTED)) {            return true;        } else {            return false;        }    }    /**     * 获取时间的方法     * @param date     * @param mode     * @param locale     * @return     */    private String getTime(Date date, String mode, Locale locale) {        SimpleDateFormat format = new SimpleDateFormat(mode, locale);        return format.format(date);    }    /**     * 将照片添加到相册中     */    public static void galleryAddPic(String mPublicPhotoPath, Context context) {        Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);        File f = new File(mPublicPhotoPath);        Uri contentUri = Uri.fromFile(f);        mediaScanIntent.setData(contentUri);        context.sendBroadcast(mediaScanIntent);    }    /**     * 拍照之后获取结果的方法     * @param requestCode     * @param resultCode     * @param data     */    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        //获取mImageView的宽高        mWidth = mImageView.getWidth();        mHeight = mImageView.getHeight();        switch (requestCode) {            //拍照            case REQ_GALLERY:                if (resultCode != Activity.RESULT_OK) return;                uri = Uri.parse(mPublicPhotoPath);                path = uri.getPath();                break;            //获取相册的图片            case REQUEST_CODE_PICK_IMAGE:                if (data == null) return;                uri = data.getData();                int sdkVersion = Integer.valueOf(Build.VERSION.SDK);                if (sdkVersion >= 19) {  // 或者 android.os.Build.VERSION_CODES.KITKAT这个常量的值是19                    path = this.uri.getPath();//5.0直接返回的是图片路径 Uri.getPath is ：  /document/image:46 ，5.0以下是一个和数据库有关的索引值                    // path_above19:/storage/emulated/0/girl.jpg 这里才是获取的图片的真实路径                    path =getPath_above19(this, this.uri);                } else {                    path = getFilePath_below19(this, this.uri);                }                break;        }        mImageView.setImageBitmap(getSmallBitmap(path, mWidth, mHeight));    }    /**     * 获取小于api19时获取相册中图片真正的uri     * @param context     * @param uri     * @return     */    public static String getFilePath_below19(Context context,Uri uri) {        //这里开始的第二部分，获取图片的路径：低版本的是没问题的，但是sdk>19会获取不到        String[] proj = {MediaStore.Images.Media.DATA};        //好像是android多媒体数据库的封装接口，具体的看Android文档        Cursor cursor = context.getContentResolver().query(uri, proj, null, null, null);        //获得用户选择的图片的索引值        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);        //将光标移至开头 ，这个很重要，不小心很容易引起越界        cursor.moveToFirst();        //最后根据索引值获取图片路径   结果类似：/mnt/sdcard/DCIM/Camera/IMG_20180724_032212.jpg        String path = cursor.getString(column_index);        return path;    }    /**     * 获取大于api19时获取相册中图片真正的uri     * @param context     * @param uri     * @return     */    @TargetApi(Build.VERSION_CODES.KITKAT)    public  static String getPath_above19(final Context context, final Uri uri) {        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;        // DocumentProvider        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {            // ExternalStorageProvider            if (isExternalStorageDocument(uri)) {                final String docId = DocumentsContract.getDocumentId(uri);                final String[] split = docId.split(":");                final String type = split[0];                if ("primary".equalsIgnoreCase(type)) {                    return Environment.getExternalStorageDirectory() + "/" + split[1];                }            }            // DownloadsProvider            else if (isDownloadsDocument(uri)) {                final String id = DocumentsContract.getDocumentId(uri);                final Uri contentUri = ContentUris.withAppendedId(                        Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));                return getDataColumn(context, contentUri, null, null);            }            // MediaProvider            else if (isMediaDocument(uri)) {                final String docId = DocumentsContract.getDocumentId(uri);                final String[] split = docId.split(":");                final String type = split[0];                Uri contentUri = null;                if ("image".equals(type)) {                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;                } else if ("video".equals(type)) {                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;                } else if ("audio".equals(type)) {                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;                }                final String selection = "_id=?";                final String[] selectionArgs = new String[]{                        split[1]                };                return getDataColumn(context, contentUri, selection, selectionArgs);            }        }        // MediaStore (and general)        else if ("content".equalsIgnoreCase(uri.getScheme())) {            // Return the remote address            if (isGooglePhotosUri(uri))                return uri.getLastPathSegment();            return getDataColumn(context, uri, null, null);        }        // File        else if ("file".equalsIgnoreCase(uri.getScheme())) {            return uri.getPath();        }        return null;    }    public static String getDataColumn(Context context, Uri uri, String selection,                                       String[] selectionArgs) {        Cursor cursor = null;        final String column = "_data";        final String[] projection = {column};        try {            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,                    null);            if (cursor != null && cursor.moveToFirst()) {                final int index = cursor.getColumnIndexOrThrow(column);                return cursor.getString(index);            }        } finally {            if (cursor != null)                cursor.close();        }        return null;    }    public static boolean isExternalStorageDocument(Uri uri) {        return "com.android.externalstorage.documents".equals(uri.getAuthority());    }    public static boolean isDownloadsDocument(Uri uri) {        return "com.android.providers.downloads.documents".equals(uri.getAuthority());    }    public static boolean isMediaDocument(Uri uri) {        return "com.android.providers.media.documents".equals(uri.getAuthority());    }    public static boolean isGooglePhotosUri(Uri uri) {        return "com.google.android.apps.photos.content".equals(uri.getAuthority());    }    /**     * 图片的压缩     * @param options     * @param reqWidth     * @param reqHeight     * @return     */    public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {        final int height = options.outHeight;        final int width = options.outWidth;        int inSampleSize = 1;        if (height > reqHeight || width > reqWidth) {            final int heightRatio = Math.round((float) height                    / (float) reqHeight);            final int widthRatio = Math.round((float) width / (float) reqWidth);            inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;        }        return inSampleSize;    }    /**     * 根据路径获得突破并压缩返回bitmap用于显示     * @param filePath     * @return     */    public static Bitmap getSmallBitmap(String filePath, int reqWidth, int reqHeight) {        final BitmapFactory.Options options = new BitmapFactory.Options();        //只返回图片的大小信息        options.inJustDecodeBounds = true;        BitmapFactory.decodeFile(filePath, options);        options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);        options.inJustDecodeBounds = false;        return BitmapFactory.decodeFile(filePath, options);    }}

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