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关于webview适配H5上传照片或者视频文件的方法

时间：2020-11-04来源：www.pcxitongcheng.com作者：电脑系统城

一、需要实现的功能：

用H5实现的App中需要在H5获取手机中的照片或者视频文件上传到服务器。

二、分析实现方法：

由于不懂前端开发，不知道H5中有 input file之类的标签控件，可以用来选择文件，刚开始的思路还是想着native 端是否要通过提供inputstream流方式，将文件内容传递给JS。后来和前端沟通之后，H5在电脑端都是用input 设置type为 file 来实现文件选择功能，于是才开始搜索资料，发现时需要在webview中设置 setWebChromeClient ，其中有对input 的响应回调:

三、具体实现：

前端代码

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5 <input type="file" accept="*/*" name="choose file">
<input type="file" accept="image/*" name="choose image">
<input type="file" accept="video/*" name="choose video">
<input type="file" accept="image/example" name="take photo and upload image">
<input type="file" accept="video/example" name="take video and upload video">

native端代码：

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45 @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
@Override
public boolean onShowFileChooser(WebView webView,
ValueCallback<Uri[]> filePathCallback,
WebChromeClient.FileChooserParams fileChooserParams) {
mFilePathCallbacks = filePathCallback;
// TODO: 根据标签中得接收类型，启动对应的文件类型选择器
String[] acceptTypes = fileChooserParams.getAcceptTypes();
for (String type : acceptTypes) {
Log.d(TAG, "acceptTypes=" + type);
}
// 针对拍照后马上进入上传状态处理
if ((acceptTypes.length > 0) && acceptTypes[0].equals("image/example")) {
Log.d(TAG, "onShowFileChooser takePhoto");
Intent it = CameraFunction.takePhoto(mContext);
startActivityForResult(it, TAKE_PHOTO_AND_UPLOAD_REQUEST);
return true;
}

// 针对录像后马上进入上传状态处理
if ((acceptTypes.length > 0) && acceptTypes[0].equals("video/example")) {
Log.d(TAG, "onShowFileChooser record video");
Intent it = CameraFunction.recordVideo(mContext);
startActivityForResult(it, RECORD_VIDEO_AND_UPLOAD_REQUEST);
return true;
}

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
if (acceptTypes.length > 0) {
if (acceptTypes[0].contains("image")) {
intent.setType("image/*");
} else if (acceptTypes[0].contains("video")) {
intent.setType("video/*");
} else {
intent.setType("*/*");
}
} else {
intent.setType("*/*");
}

WebViewActivity.this.startActivityForResult(Intent.createChooser(intent, "File Chooser"),
REQUEST_FILE_PICKER);
return true;
}

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
@Override
public boolean onShowFileChooser(WebView webView,
                                 ValueCallback<Uri[]> filePathCallback,
                                 WebChromeClient.FileChooserParams fileChooserParams) {
    mFilePathCallbacks = filePathCallback;
    // TODO: 根据标签中得接收类型，启动对应的文件类型选择器
    String[] acceptTypes = fileChooserParams.getAcceptTypes();
    for (String type : acceptTypes) {
        Log.d(TAG, "acceptTypes=" + type);
    }
    // 针对拍照后马上进入上传状态处理
    if ((acceptTypes.length > 0) && acceptTypes[0].equals("image/example")) {
        Log.d(TAG, "onShowFileChooser takePhoto");
        Intent it = CameraFunction.takePhoto(mContext);
        startActivityForResult(it, TAKE_PHOTO_AND_UPLOAD_REQUEST);
        return true;
    }

// 针对录像后马上进入上传状态处理
    if ((acceptTypes.length > 0) && acceptTypes[0].equals("video/example")) {
        Log.d(TAG, "onShowFileChooser record video");
        Intent it = CameraFunction.recordVideo(mContext);
        startActivityForResult(it, RECORD_VIDEO_AND_UPLOAD_REQUEST);
        return true;
    }

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    if (acceptTypes.length > 0) {
        if (acceptTypes[0].contains("image")) {
            intent.setType("image/*");
        } else if (acceptTypes[0].contains("video")) {
            intent.setType("video/*");
        } else {
            intent.setType("*/*");
        }
    } else {
        intent.setType("*/*");
    }

WebViewActivity.this.startActivityForResult(Intent.createChooser(intent, "File Chooser"),
            REQUEST_FILE_PICKER);
    return true;
}

回调设置uri

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41 /**
* 设置input 标签出发的回调选择文件路径，优先使用path参数，
* 其次使用uri参数
* @param uriParam
* @param pathParam
*/
private void setFilePathCallback(Uri uriParam, String pathParam) {
//都为空，则设置null
if (uriParam == null && pathParam == null) {
if (mFilePathCallback != null) {
mFilePathCallback.onReceiveValue(null);
}
if (mFilePathCallbacks != null) {
mFilePathCallbacks.onReceiveValue(null);
}
} else if (null != pathParam) { // 优先使用path
if (mFilePathCallback != null) {
Uri uri = Uri.fromFile(new File(pathParam));
mFilePathCallback.onReceiveValue(uri);
}
if (mFilePathCallbacks != null) {
Uri uri = Uri.fromFile(new File(pathParam));
mFilePathCallbacks.onReceiveValue(new Uri[] { uri });
}
} else if (null != uriParam) { //其次使用uri
if (mFilePathCallback != null) {
String path = UriUtils.getPath(getApplicationContext(), uriParam);
Uri uri = Uri.fromFile(new File(path));
mFilePathCallback.onReceiveValue(uri);
}
if (mFilePathCallbacks != null) {
String path = UriUtils.getPath(getApplicationContext(), uriParam);
Uri uri = Uri.fromFile(new File(path));
mFilePathCallbacks.onReceiveValue(new Uri[] { uri });
}
}

mFilePathCallback = null;
mFilePathCallbacks = null;

}

/**
 * 设置input 标签出发的回调选择文件路径，优先使用path参数，
 * 其次使用uri参数
 * @param uriParam
 * @param pathParam
 */
private void setFilePathCallback(Uri uriParam, String pathParam) {
    //都为空，则设置null
    if (uriParam == null && pathParam == null) {
        if (mFilePathCallback != null) {
            mFilePathCallback.onReceiveValue(null);
        }
        if (mFilePathCallbacks != null) {
            mFilePathCallbacks.onReceiveValue(null);
        }
    } else if (null != pathParam) { // 优先使用path
        if (mFilePathCallback != null) {
            Uri uri = Uri.fromFile(new File(pathParam));
            mFilePathCallback.onReceiveValue(uri);
        }
        if (mFilePathCallbacks != null) {
            Uri uri = Uri.fromFile(new File(pathParam));
            mFilePathCallbacks.onReceiveValue(new Uri[] { uri });
        }
    } else if (null != uriParam) { //其次使用uri
        if (mFilePathCallback != null) {
            String path = UriUtils.getPath(getApplicationContext(), uriParam);
            Uri uri = Uri.fromFile(new File(path));
            mFilePathCallback.onReceiveValue(uri);
        }
        if (mFilePathCallbacks != null) {
            String path = UriUtils.getPath(getApplicationContext(), uriParam);
            Uri uri = Uri.fromFile(new File(path));
            mFilePathCallbacks.onReceiveValue(new Uri[] { uri });
        }
    }

mFilePathCallback = null;
    mFilePathCallbacks = null;

}

针对各个请求场景进行处理：