webview要调起input-file拍照或者选取文件功能,可以在webview.setWebChromeClient方法中重写指定的方法,来拦截webview的input事件,并做我们相应的操作。
Android代码
webView.setWebChromeClient(new WebChromeClient() {
@Override
public void onProgressChanged(WebView view, int newProgress) {
if (newProgress == 100) {
progressBar.setVisibility(View.GONE);//加载完网页进度条消失
} else {
progressBar.setProgress(newProgress);//设置进度值
progressBar.setVisibility(View.VISIBLE);//开始加载网页时显示进度条
}
}
/**
* 8(Android 2.2) <= API <= 10(Android 2.3)回调此方法
*/
private void openFileChooser(android.webkit.ValueCallback uploadMsg) {
Log.e("WangJ", "运行方法 openFileChooser-1");
// (2)该方法回调时说明版本API < 21,此时将结果赋值给 mUploadCallbackBelow,使之 != null
mUploadCallbackBelow = uploadMsg;
takePhoto();
}
/**
* 11(Android 3.0) <= API <= 15(Android 4.0.3)回调此方法
*/
public void openFileChooser(android.webkit.ValueCallback uploadMsg, String acceptType) {
Log.e("WangJ", "运行方法 openFileChooser-2 (acceptType: " + acceptType + ")");
// 这里我们就不区分input的参数了,直接用拍照
openFileChooser(uploadMsg);
}
/**
* 16(Android 4.1.2) <= API <= 20(Android 4.4W.2)回调此方法
*/
public void openFileChooser(android.webkit.ValueCallback uploadMsg, String acceptType, String capture) {
Log.e("WangJ", "运行方法 openFileChooser-3 (acceptType: " + acceptType + "; capture: " + capture + ")");
// 这里我们就不区分input的参数了,直接用拍照
openFileChooser(uploadMsg);
}
/**
* API >= 21(Android 5.0.1)回调此方法
*/
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback valueCallback, FileChooserParams fileChooserParams) {
Log.e("WangJ", "运行方法 onShowFileChooser");
// (1)该方法回调时说明版本API >= 21,此时将结果赋值给 mUploadCallbackAboveL,使之 != null
mUploadCallbackAboveL = valueCallback;
takePhoto();
return true;
}
});
这里的java代码是来拦截input事件的,里面做了很多api版本的判断,不同版本的api调用不同的方法,下面是一些其他方法:
调起相机/选择文件的方法:takePhoto();
/**
* 调用相机
*/
private void takePhoto() {
// 指定拍照存储位置的方式调起相机
String filePath = Environment.getExternalStorageDirectory() + 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));
// Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
// startActivityForResult(intent, REQUEST_CODE);
// 选择图片(不包括相机拍照),则不用成功后发刷新图库的广播
// Intent i = new Intent(Intent.ACTION_GET_CONTENT);
// i.addCategory(Intent.CATEGORY_OPENABLE);
// i.setType("image/*");
// startActivityForResult(Intent.createChooser(i, "Image Chooser"), REQUEST_CODE);
Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
Intent Photo = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
Intent chooserIntent = Intent.createChooser(Photo, "Image Chooser");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[]{captureIntent});
startActivityForResult(chooserIntent, REQUEST_CODE);
}
onActivityResult回调:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE) {
// 经过上边(1)、(2)两个赋值操作,此处即可根据其值是否为空来决定采用哪种处理方法
if (mUploadCallbackBelow != null) {
chooseBelow(resultCode, data);
} else if (mUploadCallbackAboveL != null) {
chooseAbove(resultCode, data);
} else {
Toast.makeText(this, "发生错误", Toast.LENGTH_SHORT).show();
}
}
}
其他一些方法:
/**
* Android API < 21(Android 5.0)版本的回调处理
* @param resultCode 选取文件或拍照的返回码
* @param data 选取文件或拍照的返回结果
*/
private void chooseBelow(int resultCode, Intent data) {
Log.e("WangJ", "返回调用方法--chooseBelow");
if (RESULT_OK == resultCode) {
updatePhotos();
if (data != null) {
// 这里是针对文件路径处理
Uri uri = data.getData();
if (uri != null) {
Log.e("WangJ", "系统返回URI:" + uri.toString());
mUploadCallbackBelow.onReceiveValue(uri);
} else {
mUploadCallbackBelow.onReceiveValue(null);
}
} else {
// 以指定图像存储路径的方式调起相机,成功后返回data为空
Log.e("WangJ", "自定义结果:" + imageUri.toString());
mUploadCallbackBelow.onReceiveValue(imageUri);
}
} else {
mUploadCallbackBelow.onReceiveValue(null);
}
mUploadCallbackBelow = null;
}
/**
* Android API >= 21(Android 5.0) 版本的回调处理
* @param resultCode 选取文件或拍照的返回码
* @param data 选取文件或拍照的返回结果
*/
private void chooseAbove(int resultCode, Intent data) {
Log.e("WangJ", "返回调用方法--chooseAbove");
if (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();
if (uriData != null) {
results = new Uri[]{uriData};
for (Uri uri : results) {
Log.e("WangJ", "系统返回URI:" + uri.toString());
}
mUploadCallbackAboveL.onReceiveValue(results);
} else {
mUploadCallbackAboveL.onReceiveValue(null);
}
} else {
Log.e("WangJ", "自定义结果:" + imageUri.toString());
mUploadCallbackAboveL.onReceiveValue(new Uri[]{imageUri});
}
} else {
mUploadCallbackAboveL.onReceiveValue(null);
}
mUploadCallbackAboveL = null;
}
private void updatePhotos() {
// 该广播即使多发(即选取照片成功时也发送)也没有关系,只是唤醒系统刷新媒体文件
Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
intent.setData(imageUri);
sendBroadcast(intent);
}
相关的全局变量:
private android.webkit.ValueCallback mUploadCallbackAboveL;
private android.webkit.ValueCallback mUploadCallbackBelow;
private Uri imageUri;
private int REQUEST_CODE = 1234;
原文参考链接:https://blog.csdn.net/qq_35373333/article/details/79565629