在Webview中打开输入类型文件的摄像头，但不打开Android
我是安卓系统的新手。我正在创建一个小应用程序来拍照并上传到服务器。我正在使用Webview和html表单来实现这一点。浏览器中（镀铬）摄像头正在打开。但在webview中，单击“选择文件”时相机不会打开。有人知道解决办法吗？下面是我使用的代码 HTML代码在Webview中打开输入类型文件的摄像头，但不打开Android,android,webview,Android,Webview,我是安卓系统的新手。我正在创建一个小应用程序来拍照并上传到服务器。我正在使用Webview和html表单来实现这一点。浏览器中（镀铬）摄像头正在打开。但在webview中，单击“选择文件”时相机不会打开。有人知道解决办法吗？下面是我使用的代码 HTML代码 <html> <body> <form> <input type="file" accept="image/*;capture=camera"/> <input type="submit"
<html>
<body>
<form>
<input type="file" accept="image/*;capture=camera"/>
<input type="submit"/>
</form>
</body>
</html>
public class ShowWebView extends Activity {
//private Button button;
private WebView webView;
final Activity activity = this;
public Uri imageUri;
private static final int FILECHOOSER_RESULTCODE = 2888;
private ValueCallback<Uri> mUploadMessage;
private Uri mCapturedImageURI = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.show_web_view);
//Get webview
webView = (WebView) findViewById(R.id.webView1);
// Define url that will open in webview
String webViewUrl = "http://www.androidexample.com/media/webview/details.html";
// Javascript inabled on webview
webView.getSettings().setJavaScriptEnabled(true);
// Other webview options
webView.getSettings().setLoadWithOverviewMode(true);
//webView.getSettings().setUseWideViewPort(true);
//Other webview settings
webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
webView.setScrollbarFadingEnabled(false);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setPluginState(PluginState.ON);
webView.getSettings().setAllowFileAccess(true);
webView.getSettings().setSupportZoom(true);
//Load url in webview
webView.loadUrl(webViewUrl);
// Define Webview manage classes
startWebView();
}
private void startWebView() {
// Create new webview Client to show progress dialog
// Called When opening a url or click on link
// You can create external class extends with WebViewClient
// Taking WebViewClient as inner class
webView.setWebViewClient(new WebViewClient() {
ProgressDialog progressDialog;
//If you will not use this method url links are open in new brower not in webview
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// Check if Url contains ExternalLinks string in url
// then open url in new browser
// else all webview links will open in webview browser
if(url.contains("google")){
// Could be cleverer and use a regex
//Open links in new browser
view.getContext().startActivity(
new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
// Here we can open new activity
return true;
} else {
// Stay within this webview and load url
view.loadUrl(url);
return true;
}
}
//Show loader on url load
public void onLoadResource (WebView view, String url) {
// if url contains string androidexample
// Then show progress Dialog
if (progressDialog == null && url.contains("androidexample")
) {
// in standard case YourActivity.this
progressDialog = new ProgressDialog(ShowWebView.this);
progressDialog.setMessage("Loading...");
progressDialog.show();
}
}
// Called when all page resources loaded
public void onPageFinished(WebView view, String url) {
try{
// Close progressDialog
if (progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
}catch(Exception exception){
exception.printStackTrace();
}
}
});
// You can create external class extends with WebChromeClient
// Taking WebViewClient as inner class
// we will define openFileChooser for select file from camera or sdcard
webView.setWebChromeClient(new WebChromeClient() {
// openFileChooser for Android 3.0+
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType){
// Update message
mUploadMessage = uploadMsg;
try{
// Create AndroidExampleFolder at sdcard
File imageStorageDir = new File(
Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES)
, "AndroidExampleFolder");
if (!imageStorageDir.exists()) {
// Create AndroidExampleFolder at sdcard
imageStorageDir.mkdirs();
}
// Create camera captured image file path and name
File file = new File(
imageStorageDir + File.separator + "IMG_"
+ String.valueOf(System.currentTimeMillis())
+ ".jpg");
mCapturedImageURI = Uri.fromFile(file);
// Camera capture image intent
final Intent captureIntent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
// Create file chooser intent
Intent chooserIntent = Intent.createChooser(i, "Image Chooser");
// Set camera intent to file chooser
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS
, new Parcelable[] { captureIntent });
// On select image call onActivityResult method of activity
startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
}
catch(Exception e){
Toast.makeText(getBaseContext(), "Exception:"+e,
Toast.LENGTH_LONG).show();
}
}
// openFileChooser for Android < 3.0
public void openFileChooser(ValueCallback<Uri> uploadMsg){
openFileChooser(uploadMsg, "");
}
//openFileChooser for other Android versions
public void openFileChooser(ValueCallback<Uri> uploadMsg,
String acceptType,
String capture) {
openFileChooser(uploadMsg, acceptType);
}
// The webPage has 2 filechoosers and will send a
// console message informing what action to perform,
// taking a photo or updating the file
public boolean onConsoleMessage(ConsoleMessage cm) {
onConsoleMessage(cm.message(), cm.lineNumber(), cm.sourceId());
return true;
}
public void onConsoleMessage(String message, int lineNumber, String sourceID) {
//Log.d("androidruntime", "Show console messages, Used for debugging: " + message);
}
}); // End setWebChromeClient
}
// Return here when file selected from camera or from SDcard
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
if(requestCode==FILECHOOSER_RESULTCODE)
{
if (null == this.mUploadMessage) {
return;
}
Uri result=null;
try{
if (resultCode != RESULT_OK) {
result = null;
} else {
// retrieve from the private variable if the intent is null
result = intent == null ? mCapturedImageURI : intent.getData();
}
}
catch(Exception e)
{
Toast.makeText(getApplicationContext(), "activity :"+e,
Toast.LENGTH_LONG).show();
}
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
}
// Open previous opened link from history on webview when back button pressed
@Override
// Detect when the back button is pressed
public void onBackPressed() {
if(webView.canGoBack()) {
webView.goBack();
} else {
// Let the system handle the back button
super.onBackPressed();
}
}
公共类ShowWebView扩展活动{
//私人按钮；
私有网络视图；
最终活动=此；
公共Uri-imageUri；
私有静态final int FILECHOOSER_RESULTCODE=2888；
private ValueCallback mUploadMessage；
私有Uri mCapturedImageURI=null；
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.show\u web\u视图）；
//获取网络视图
webView=（webView）findViewById（R.id.webView1）；
//定义将在webview中打开的url
字符串webViewUrl=”http://www.androidexample.com/media/webview/details.html";
//在webview上不使用Javascript
webView.getSettings（）.setJavaScriptEnabled（true）；
//其他网络视图选项
webView.getSettings（）.setLoadWithOverview模式（true）；
//webView.getSettings（）.setUseWideViewPort（true）；
//其他网络视图设置
webView.setScrollBarStyle（webView.SCROLLBARS\u外部\u覆盖）；
webView.SetScrollBarFadinEnabled（假）；
webView.getSettings（）.setBuilTinZoomControl（true）；
webView.getSettings（）.setPluginState（PluginState.ON）；
webView.getSettings（）.setAllowFileAccess（true）；
webView.getSettings（）.setSupportZoom（true）；
//在webview中加载url
loadUrl（webViewUrl）；
//定义Webview管理类
startWebView（）；
}
私有void startWebView（）{
//创建新的webview客户端以显示进度对话框
//打开url或单击链接时调用
//您可以使用WebViewClient创建外部类扩展
//将WebViewClient作为内部类
setWebViewClient（新的WebViewClient（）{
进行对话进行对话；
//如果不使用此方法，url链接将在新浏览器中打开，而不是在webview中打开
公共布尔值应重写url加载（WebView视图，字符串url）{
//检查Url中是否包含ExternalLinks字符串
//然后在新浏览器中打开url
//否则，所有webview链接都将在webview浏览器中打开
如果（url.contains（“谷歌”）{
//可以更聪明，使用正则表达式
//在新浏览器中打开链接
view.getContext（）.startActivity(
新的意图（Intent.ACTION_视图，Uri.parse（url））；
//在这里我们可以开始新的活动
返回true；
}否则{
//保持在此webview内并加载url
view.loadUrl（url）；
返回true；
}
}
//在url加载时显示加载程序
public void onLoadResource（WebView视图，字符串url）{
//如果url包含字符串androidexample
//然后显示进度对话框
if（progressDialog==null&&url.contains（“androidexample”）
) {
//在标准情况下，您的活动是
progressDialog=新建progressDialog（ShowWebView.this）；
progressDialog.setMessage（“加载…”）；
progressDialog.show（）；
}
}
//在加载所有页面资源时调用
公共void onPageFinished（WebView视图，字符串url）{
试一试{
//关闭进程对话框
if（progressDialog.isShowing（））{
progressDialog.disclose（）；
progressDialog=null；
}
}捕获（异常）{
异常。printStackTrace（）；
}
}
});
//您可以使用WebChromeClient创建外部类扩展
//将WebViewClient作为内部类
//我们将定义openFileChooser，用于从相机或SD卡选择文件
setWebView.WebChromeClient（新WebChromeClient（）{
//适用于Android 3.0的openFileChooser+
public void openFileChooser（ValueCallback uploadMsg，String acceptType）{
//更新消息
mUploadMessage=上传消息；
试试{
//在SD卡上创建AndroidExample文件夹
File imageStorageDir=新文件(
Environment.getExternalStoragePublicDirectory(
环境。目录（图片）
，“AndroidExampleFolder”）；
如果（！imageStorageDir.exists（））{
//在SD卡上创建AndroidExample文件夹
imageStorageDir.mkdirs（）；
}
//创建相机捕获的图像文件路径和名称
文件=新文件(
imageStorageDir+File.separator+“IMG\ux”
+String.valueOf（System.currentTimeMillis（））
+“.jpg”）；
mCapturedImageURI=Uri.fromFile（文件）；
//摄像机捕捉图像意图
最终意图捕获意图=新意图(
android.provider.MediaStore.ACTION\u IMAGE\u CAPTURE）；
putExtra（MediaStore.EXTRA_输出，mCapturedImageURI）；
意向i=新意向（意向.行动\u获取\u内容）；
i、 addCategory（意图。类别可打开）；
i、 setType（“image/*”）；
//创建文件选择器意图
Intent chooserint=Intent.createChooser（i，“图像选择器”）；
//将摄影机意图设置为文件选择器
选择content.putExtra（Intent.EXTRA\u初始意图
，新邮包
public class ShowWebView extends Activity {
//private Button button;
private WebView webView;
final Activity activity = this;
public Uri imageUri;
private static final int FILECHOOSER_RESULTCODE = 2888;
private ValueCallback<Uri> mUploadMessage;
private Uri mCapturedImageURI = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.show_web_view);
//Get webview
webView = (WebView) findViewById(R.id.webView1);
// Define url that will open in webview
String webViewUrl = "http://www.androidexample.com/media/webview/details.html";
// Javascript inabled on webview
webView.getSettings().setJavaScriptEnabled(true);
// Other webview options
webView.getSettings().setLoadWithOverviewMode(true);
//webView.getSettings().setUseWideViewPort(true);
//Other webview settings
webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
webView.setScrollbarFadingEnabled(false);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setPluginState(PluginState.ON);
webView.getSettings().setAllowFileAccess(true);
webView.getSettings().setSupportZoom(true);
//Load url in webview
webView.loadUrl(webViewUrl);
// Define Webview manage classes
startWebView();
}
private void startWebView() {
// Create new webview Client to show progress dialog
// Called When opening a url or click on link
// You can create external class extends with WebViewClient
// Taking WebViewClient as inner class
webView.setWebViewClient(new WebViewClient() {
ProgressDialog progressDialog;
//If you will not use this method url links are open in new brower not in webview
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// Check if Url contains ExternalLinks string in url
// then open url in new browser
// else all webview links will open in webview browser
if(url.contains("google")){
// Could be cleverer and use a regex
//Open links in new browser
view.getContext().startActivity(
new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
// Here we can open new activity
return true;
} else {
// Stay within this webview and load url
view.loadUrl(url);
return true;
}
}
//Show loader on url load
public void onLoadResource (WebView view, String url) {
// if url contains string androidexample
// Then show progress Dialog
if (progressDialog == null && url.contains("androidexample")
) {
// in standard case YourActivity.this
progressDialog = new ProgressDialog(ShowWebView.this);
progressDialog.setMessage("Loading...");
progressDialog.show();
}
}
// Called when all page resources loaded
public void onPageFinished(WebView view, String url) {
try{
// Close progressDialog
if (progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
}catch(Exception exception){
exception.printStackTrace();
}
}
});
// You can create external class extends with WebChromeClient
// Taking WebViewClient as inner class
// we will define openFileChooser for select file from camera or sdcard
webView.setWebChromeClient(new WebChromeClient() {
// openFileChooser for Android 3.0+
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType){
// Update message
mUploadMessage = uploadMsg;
try{
// Create AndroidExampleFolder at sdcard
File imageStorageDir = new File(
Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES)
, "AndroidExampleFolder");
if (!imageStorageDir.exists()) {
// Create AndroidExampleFolder at sdcard
imageStorageDir.mkdirs();
}
// Create camera captured image file path and name
File file = new File(
imageStorageDir + File.separator + "IMG_"
+ String.valueOf(System.currentTimeMillis())
+ ".jpg");
mCapturedImageURI = Uri.fromFile(file);
// Camera capture image intent
final Intent captureIntent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
// Create file chooser intent
Intent chooserIntent = Intent.createChooser(i, "Image Chooser");
// Set camera intent to file chooser
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS
, new Parcelable[] { captureIntent });
// On select image call onActivityResult method of activity
startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
}
catch(Exception e){
Toast.makeText(getBaseContext(), "Exception:"+e,
Toast.LENGTH_LONG).show();
}
}
// openFileChooser for Android < 3.0
public void openFileChooser(ValueCallback<Uri> uploadMsg){
openFileChooser(uploadMsg, "");
}
//openFileChooser for other Android versions
public void openFileChooser(ValueCallback<Uri> uploadMsg,
String acceptType,
String capture) {
openFileChooser(uploadMsg, acceptType);
}
// The webPage has 2 filechoosers and will send a
// console message informing what action to perform,
// taking a photo or updating the file
public boolean onConsoleMessage(ConsoleMessage cm) {
onConsoleMessage(cm.message(), cm.lineNumber(), cm.sourceId());
return true;
}
public void onConsoleMessage(String message, int lineNumber, String sourceID) {
//Log.d("androidruntime", "Show console messages, Used for debugging: " + message);
}
}); // End setWebChromeClient
}
// Return here when file selected from camera or from SDcard
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
if(requestCode==FILECHOOSER_RESULTCODE)
{
if (null == this.mUploadMessage) {
return;
}
Uri result=null;
try{
if (resultCode != RESULT_OK) {
result = null;
} else {
// retrieve from the private variable if the intent is null
result = intent == null ? mCapturedImageURI : intent.getData();
}
}
catch(Exception e)
{
Toast.makeText(getApplicationContext(), "activity :"+e,
Toast.LENGTH_LONG).show();
}
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
}
// Open previous opened link from history on webview when back button pressed
@Override
// Detect when the back button is pressed
public void onBackPressed() {
if(webView.canGoBack()) {
webView.goBack();
} else {
// Let the system handle the back button
super.onBackPressed();
}
}
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setPluginState(WebSettings.PluginState.ON);
webview.getSettings().setMediaPlaybackRequiresUserGesture(false);
webview.setWebChromeClient(new WebChromeClient(){
// Need to accept permissions to use the camera
@Override
public void onPermissionRequest(final PermissionRequest request) {
Log.d("onPermissionRequest");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
request.grant(request.getResources());
}
}
});