获取本地图片，并保存到bean

最新推荐文章于 2020-10-28 19:51:46 发布

原创最新推荐文章于 2020-10-28 19:51:46 发布 · 305 阅读

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本文详细介绍了在Android应用中如何实现从本地选择图片并显示在ImageView上的过程，包括使用Intent跳转到本地图片选择界面，获取选中图片的路径，以及通过Glide库加载图片。

获取本地图片，并建立

1.点击跳转到本地图片

case R.id.iv_wish_bg:
                Intent intent = new Intent();
                /* 开启Pictures画面Type设定为image */
                intent.setType("image/*");
                /* 使用Intent.ACTION_GET_CONTENT这个Action */
                intent.setAction(Intent.ACTION_GET_CONTENT);
                /* 取得相片后返回本画面 */
                startActivityForResult(intent, 1);
                break;

2.保存路径，并建立

 @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        if (resultCode == RESULT_OK) {
            Uri uri = data.getData();
            //这是本机的图片路径
           img_url= UrlUtils.getPathByUri4kitkat(WishSettingActivity.this,uri);
            etWishBg.setText("1");
            ContentResolver cr = this.getContentResolver();//内容解析器
            try {
                Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));//打开输出流
                ImageView imageView = (ImageView) findViewById(R.id.iv_wish_bg);
                /* 将Bitmap设定到ImageView */
                imageView.setImageBitmap(bitmap);
            } catch (FileNotFoundException e) {
                Log.e("Exception", e.getMessage(),e);
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

3.getPathByUri4kitkat（）方法

 @SuppressLint("NewApi")

    public static String getPathByUri4kitkat(final Context context, final Uri uri) {

        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

        // DocumentProvider文件提供者

        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {

            if (isExternalStorageDocument(uri)) {// ExternalStorageProvider

                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];

                }

            } else if (isDownloadsDocument(uri)) {// DownloadsProvider

                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);

            } else if (isMediaDocument(uri)) {// MediaProvider

                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);

            }

        } else if ("content".equalsIgnoreCase(uri.getScheme())) {// MediaStore

            // (and

            // general)

            return getDataColumn(context, uri, null, null);

        } else if ("file".equalsIgnoreCase(uri.getScheme())) {// File

            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.

     */

    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 column_index = cursor.getColumnIndexOrThrow(column);

                return cursor.getString(column_index);

            }

        } finally {

            if (cursor != null)

                cursor.close();

        }

        return null;

    }



    /**

     * @param uri

     *            The Uri to check.

     * @return Whether the Uri authority is ExternalStorageProvider.

     */

    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());

    }



    /**

     * @param uri

     *            The Uri to check.

     * @return Whether the Uri authority is MediaProvider.

     */

    public static boolean isMediaDocument(Uri uri) {

        return "com.android.providers.media.documents".equals(uri.getAuthority());

    }

4.拿出来使用

if (img_url!=null){
                Glide.with(WishShowActivity.this).load(img_url).into(ivBg);
            }