android 拍照，图片裁剪，选择图片

照片

1.跳转到拍照界面

 File imageFile = new File(Environment                                .getExternalStorageDirectory(), "tempImage.jpg");                        // 如果存在就删了重新创建                        try {                            if (imageFile.exists()) {                                imageFile.delete();                            }                            imageFile.createNewFile();                        } catch (IOException e) {                            e.printStackTrace();                        }                        // 将存储地址转化成uri对象                        imageUri =Uri.fromFile(imageFile);                        // 设置打开照相的Intent                        Intent intent4 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);                        // 设置相片的输出uri为刚才转化的imageUri                        intent4.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);                        // 开启相机程序，设置requestCode为TOKE_PHOTO                        startActivityForResult(intent4, IMAGE_MY);

2.拍照界面返回后，跳转到裁剪界面

@Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (requestCode == IMAGE_MY && resultCode == RESULT_OK){            // 设置intent为启动裁剪程序            Intent intent = new Intent("com.android.camera.action.CROP");            // 设置Data为刚才的imageUri和Type为图片类型            intent.setDataAndType(imageUri, "image/*");            // 设置可缩放            intent.putExtra("scale", true);            // 设置输出地址为imageUri            intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);            // 开启裁剪,设置requestCode为CROP_PHOTO            startActivityForResult(intent, CROP_PHOTO);        }        if (requestCode == CROP_PHOTO){            Bitmap bitmap;            try {                //通过BitmapFactory将imageUri转化成bitmap                bitmap = BitmapFactory.decodeStream(getContentResolver()                        .openInputStream(imageUri));                //设置显示                imageView.setImageBitmap(bitmap);            } catch (FileNotFoundException e) {                e.printStackTrace();            }        }    }

android 拍照，图片裁剪，选择图片_第1张图片

android 拍照，图片裁剪，选择图片_第2张图片

选择图片
1.转到照片选择界面

   Intent intent4 = new Intent(Intent.ACTION_GET_CONTENT);                        intent4.setType("image/*");                        startActivityForResult(intent4,IMAGE_MY);

2.选择照片界面返回

 @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        //从照片选择界面返回        if (requestCode == IMAGE_MY && resultCode == RESULT_OK){            Uri uri = data.getData();            //将uri转化为对应的本地路径            String path = getFilePath(MainActivity.this,uri);            Bitmap bitmap = BitmapFactory.decodeFile(path);            imageView.setImageBitmap(bitmap);        }    }

3.将uri转换为对应的路径

 @TargetApi(Build.VERSION_CODES.KITKAT)    public static String getFilePath(Context context, Uri uri) {        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;        // DocumentProvider        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {            // ExternalStorageProvider 是否外部存储内容提供者            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];                }            // TODO handle non-primary volumes            }            // DownloadsProvider 是否下载内容提供者            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 是否多媒体内容提供者            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 getDataColumn(context, uri, null, null);        }        // File        else if ("file".equalsIgnoreCase(uri.getScheme())) {            return uri.getPath();        }        return null;    } /**     * Get the value of the data column for this Uri. This is useful for     * MediaStore Uris, and other file-based ContentProviders.     *     * @param context The context.     * @param uri The Uri to query.     * @param selection (Optional) Filter used in the query.     * @param selectionArgs (Optional) Selection arguments used in the query.     * @return The value of the _data column, which is typically a file path.     */    private 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;    }    /**     * 判断外部存储是否可用     *      *     */    public static boolean isExternalStorageWritable() {        String state = Environment.getExternalStorageState();        if (Environment.MEDIA_MOUNTED.equals(state)) {            return true;        }        Log.e("", "ExternalStorage not mounted");        return false;    }    public static boolean isMediaDocument(Uri uri) {        return "com.android.providers.media.documents".equals(uri.getAuthority());    }    public static boolean isExternalStorageDocument(Uri uri) {        return "com.android.externalstorage.documents".equals(uri.getAuthority());    }    /**     * @param uri The Uri to check.     * @return Whether the Uri authority is DownloadsProvider.     */    public static boolean isDownloadsDocument(Uri uri) {        return "com.android.providers.downloads.documents".equals(uri.getAuthority());    }

android 拍照，图片裁剪，选择图片_第3张图片

android 拍照，图片裁剪，选择图片_第4张图片

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