前言

在日常开发中，app中经常有嵌入前端网页的需求，里面如果有一些调用相机拍照、录视频、查看本地图片功能时，需要Android WebView端做一些配置、来保证能顺利调起相应的Intent，来适配前端程序

需求一：webView端调用相机拍照，同时回传给前端程序

<code>{

webView.setWebChromeClient(new WebChromeClient(){

@TargetApi(Build.VERSION_CODES.LOLLIPOP)

@Override

public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {

Log.e(TAG,"onShowFileChooser fileChooserParams:"+fileChooserParams.getAcceptTypes()[0]);

mUploadCallbackAboveL = filePathCallback;//数据回传会用到，记录成全局

WebViewTestUI.this.fileChooserParams=fileChooserParams;

if (fileChooserParams != null) {

//最终通过fileChooserParams.isCaptureEnabled()方法来解决你的困惑 官方解释是否为设备

if (fileChooserParams.isCaptureEnabled()) {

//所以这里写调用相机逻辑

if (ContextCompat.checkSelfPermission(WebViewTestUI.this, android.Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {

// If camera permission is not granted, request it

ActivityCompat.requestPermissions(WebViewTestUI.this, new String[]{android.Manifest.permission.CAMERA}, CAMERA_PERMISSION_REQUEST);

} else {

// Camera permission is already granted, launch camera

takePhoto();

}

}

return true;

}

});

}

private void takePhoto() {

String filePath = Environment.getExternalStorageDirectory() + File.separator

+ File.separator

+ Environment.DIRECTORY_PICTURES + File.separator;

String fileName = "IMG_" + DateFormat.format("yyyyMMdd_hhmmss", Calendar.getInstance(Locale.CHINA)) + ".jpg";

imageUri = Uri.fromFile(new File(filePath + fileName));

//相册相机选择窗

Intent captureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

if(captureIntent.resolveActivity(getPackageManager()) != null){

captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);

startActivityForResult(captureIntent, 2);

}

}

//Intent的回调

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode,resultCode,data);

if (Build.VERSION.SDK_INT >= 21) {

chooseAbove(resultCode, data);

}

}

public void chooseAbove(int resultCode, Intent data) {

Log.e("Base", "调用方法 chooseAbove " +data+" resultCode:"+resultCode);

if (Activity.RESULT_OK == resultCode) {

updatePhotos();

if (data != null) {

// 这里是针对从文件中选图片的处理

Uri[] results;

Uri uriData = data.getData();

Log.e("Base", "uriData：" + uriData);

if (uriData != null) {

results = new Uri[]{uriData};

for (Uri uri : results) {

Log.e("Base", "系统里取到的图片：" + uri.toString());

}

mUploadCallbackAboveL.onReceiveValue(results);//回传给前端

} else {

mUploadCallbackAboveL.onReceiveValue(null);

}

} else {

Log.e("Base", "自己命名的图片：" + imageUri.toString());

mUploadCallbackAboveL.onReceiveValue(new Uri[]{imageUri});

}

} else {

mUploadCallbackAboveL.onReceiveValue(null);

}

mUploadCallbackAboveL = null;

}

以上代码的图片未经过压缩、可以设置相机分辨率、或者教由前端处理

需求二:拍摄视频

{

//根据参数

if(fileChooserParams.getAcceptTypes()[0].equals("video/*")){

if (ContextCompat.checkSelfPermission(WebViewTestUI.this, android.Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {

// If camera permission is not granted, request it

ActivityCompat.requestPermissions(WebViewTestUI.this, new String[]{android.Manifest.permission.CAMERA}, CAMERA_PERMISSION_VIDEOREQUEST);

} else {

// Camera permission is already granted, launch camera

takeVideo();

}

return true;

}

}

private void takeVideo() {

//相册相机选择窗

Intent captureIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

startActivityForResult(captureIntent, 1);

}

需求三：选择文件

也是根据入参类型做不同处理、同时注意存储权限问题

总结

以上内容可以通过查资料或者chatgpt或者百度来查看，自己记录下，方便以后查看