如何解决Android不同系统版本WebView上传图片的bug

最新推荐文章于 2021-05-28 15:19:35 发布

johnson-大牛

最新推荐文章于 2021-05-28 15:19:35 发布

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分类专栏： Android 文章标签： android webview

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问题：在做WebView网页上传的图片的时候，发现图片无法上传，于是在网上找了各种资料，发现是系统导致的bug。下面的代码能解决这个问题。

private class MyWebChromeClient extends WebChromeClient {
    // Android < 3.0 调用这个方法
    public void openFileChooser(ValueCallback<Uri> uploadMsg) {
        log.d("openFileChooser...1");
        this.openFileChooser(uploadMsg, "*/*");
    }

    // 3.0 + 调用这个方法
    public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
        log.d("openFileChooser...2");
        this.openFileChooser(uploadMsg, acceptType, null);
    }

    // Android > 4.1.1 调用这个方法
    public void openFileChooser(final ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
        log.d("openFileChooser...3");
        mUploadMessage = uploadMsg; // 使用uploadMsg返回获取到的文件路径
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType("*/*");
        startActivityForResult(intent, FILECHOOSER_RESULTCODE);
    }

    @Override
    public void onProgressChanged(WebView view, int newProgress) {
        super.onProgressChanged(view, newProgress);
        if (newProgress == 100) {
            mProgressBar.setVisibility(View.GONE);
        } else {
            if (mProgressBar.getVisibility() == View.GONE)
                mProgressBar.setVisibility(View.VISIBLE);
            mProgressBar.setProgress(newProgress);
        }
    }
}

/**
 * 返回文件选择
 */
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    if (requestCode == FILECHOOSER_RESULTCODE) {
        if (mUploadMessage == null)
            return;
        Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
        try {
            mUploadMessage.onReceiveValue(/*Uri.fromFile(new File(getRealFilePath(this, result)))*/result);
        } catch (Exception e) {
            mUploadMessage = null;
            e.printStackTrace();
        }
        mUploadMessage = null;
    }
}

/**
 * 根据uri获取图片的真真实路径
 *
 * @param context
 * @param uri
 * @return
 */
private String getRealFilePath(Context context, Uri uri) {
    if (null == uri) return null;
    final String scheme = uri.getScheme();
    String data = null;
    if (scheme == null) {
        data = uri.getPath();
    } else if (ContentResolver.SCHEME_FILE.equals(scheme)) {
        data = uri.getPath();
    } else if (ContentResolver.SCHEME_CONTENT.equals(scheme)) {
        Cursor cursor = context.getContentResolver().query(uri, new String[]{MediaStore.Images.ImageColumns.DATA}, null, null, null);
        if (null != cursor) {
            if (cursor.moveToFirst()) {
                int index = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
                if (index > -1) {
                    data = cursor.getString(index);
                }
            }
            cursor.close();
        }
    }
    return data;
}