您好，我遇到以下问题，我的Web视图中的网站上有一个照片条目，单击该图片可以在浏览器（在普通浏览器中）中打开相机，但是在Web视图中却无法选择相机或画廊我该如何解决？我尝试实现os-file-up库的一部分，但没有得到结果。
MainActivity.java
package br.com.fradeilha.www.supermercadofrade;
import android.Manifest;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebResourceError;
import android.webkit.WebResourceRequest;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import im.delight.android.webview.AdvancedWebView;
public class MainActivity extends AppCompatActivity implements AdvancedWebView.Listener {
private AdvancedWebView mWebView;
private ProgressBar pb;
private String mCM;
private ValueCallback<Uri> mUM;
private ValueCallback<Uri[]> mUMA;
private final static int FCR=1;
private boolean multiple_files = false;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent){
super.onActivityResult(requestCode, resultCode, intent);
if(Build.VERSION.SDK_INT >= 21){
Uri[] results = null;
//checking if response is positive
if(resultCode== Activity.RESULT_OK){
if(requestCode == FCR){
if(null == mUMA){
return;
}
if(intent == null || intent.getData() == null){
if(mCM != null){
results = new Uri[]{Uri.parse(mCM)};
}
}else{
String dataString = intent.getDataString();
if(dataString != null){
results = new Uri[]{Uri.parse(dataString)};
} else {
if(multiple_files) {
if (intent.getClipData() != null) {
final int numSelectedFiles = intent.getClipData().getItemCount();
results = new Uri[numSelectedFiles];
for (int i = 0; i < numSelectedFiles; i++) {
results[i] = intent.getClipData().getItemAt(i).getUri();
}
}
}
}
}
}
}
mUMA.onReceiveValue(results);
mUMA = null;
}else{
if(requestCode == FCR){
if(null == mUM) return;
Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
mUM.onReceiveValue(result);
mUM = null;
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Identifica
pb = (findViewById(R.id.pb));
mWebView = findViewById(R.id.webview);
assert mWebView != null;
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setAllowFileAccess(true);
mWebView.getSettings().setDomStorageEnabled(true);
mWebView.setListener(this, this);
mWebView.loadUrl("https://www.sitemercado.com.br/frade");
mWebView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
mWebView.setWebChromeClient(new WebChromeClient() {
/*
* openFileChooser is not a public Android API and has never been part of the SDK.
*/
//handling input[type="file"] requests for android API 16+
@SuppressLint("ObsoleteSdkInt")
@SuppressWarnings("unused")
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
mUM = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");
if (multiple_files && Build.VERSION.SDK_INT >= 18) {
i.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
}
startActivityForResult(Intent.createChooser(i, "File Chooser"), FCR);
}
//handling input[type="file"] requests for android API 21+
@SuppressLint("InlinedApi")
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
if (file_permission()) {
String[] perms = {Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.CAMERA};
//checking for storage permission to write images for upload
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, perms, FCR);
//checking for WRITE_EXTERNAL_STORAGE permission
} else if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE}, FCR);
//checking for CAMERA permissions
} else if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA}, FCR);
}
if (mUMA != null) {
mUMA.onReceiveValue(null);
}
mUMA = filePathCallback;
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(MainActivity.this.getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = createImageFile();
takePictureIntent.putExtra("PhotoPath", mCM);
} catch (IOException ex) {
}
if (photoFile != null) {
mCM = "file:" + photoFile.getAbsolutePath();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
} else {
takePictureIntent = null;
}
}
Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
contentSelectionIntent.setType("*/*");
if (multiple_files) {
contentSelectionIntent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
}
Intent[] intentArray;
if (takePictureIntent != null) {
intentArray = new Intent[]{takePictureIntent};
} else {
intentArray = new Intent[0];
}
Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
chooserIntent.putExtra(Intent.EXTRA_TITLE, "File Chooser");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
startActivityForResult(chooserIntent, FCR);
return true;
}else{
return false;
}
}
});
mWebView.setWebViewClient(new WebViewClient(){
@Override
public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
Intent i = new Intent(MainActivity.this, off.class);
startActivity(i);
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
finish();
}
});
// Detecta Validação
mWebView.setWebViewClient(new WebViewClient(){
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getPath().contains("valida")) {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
return true;
}
return false;
}
});
// Permissão Camera
// Barra de Progresso
pb.setProgress(0);
mWebView.setWebChromeClient(new WebChromeClient() {
@Override
public void onProgressChanged(WebView view, int Progress) {
pb.setProgress(Progress);
if (Progress == 100) {
pb.setVisibility(view.GONE);
} else {
pb.setVisibility(view.VISIBLE);
}
super.onProgressChanged(view, Progress);
}
});
if (isConnected(getApplicationContext())){
} else {
Intent i = new Intent(MainActivity.this, off.class);
startActivity(i);
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
finish();
}
// ...
}
@SuppressLint("NewApi")
@Override
// Verifica conexão ao voltar de segundo plano
protected void onResume() {
super.onResume();
mWebView.onResume();
if (isConnected(getApplicationContext())){
} else {
Intent i = new Intent(MainActivity.this, off.class);
startActivity(i);
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
finish();
}
}
@SuppressLint("NewApi")
@Override
protected void onPause() {
mWebView.onPause();
// ...
super.onPause();
}
@Override
protected void onDestroy() {
mWebView.onDestroy();
// ...
super.onDestroy();
}
// @Override
// protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
// super.onActivityResult(requestCode, resultCode, intent);
// }
public boolean file_permission(){
if(Build.VERSION.SDK_INT >=23 && (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, 1);
return false;
}else{
return true;
}
}
//creating new image file here
private File createImageFile() throws IOException{
@SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "img_"+timeStamp+"_";
File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
return File.createTempFile(imageFileName,".jpg",storageDir);
}
@Override
public void onBackPressed() {
if (!mWebView.onBackPressed()) {
return;
}
// ...
super.onBackPressed();
}
@Override
public void onPageStarted(String url, Bitmap favicon) {
}
@Override
public void onPageFinished(String url) {
}
// Detecta erro de carregamento
@Override
public void onPageError(int errorCode, String description, String failingUrl) {
Intent i = new Intent(MainActivity.this, off.class);
startActivity(i);
overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
finish();
}
@Override
public void onDownloadRequested(String url, String suggestedFilename, String mimeType, long contentLength, String contentDisposition, String userAgent) {
}
@Override
public void onExternalPageRequest(String url) {
}
// Script que verifica internet
public static boolean isConnected(Context context) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
if (null != activeNetwork && activeNetwork.isConnectedOrConnecting()) {
return true;
} else {
return false;
}
}
}
AndroidManifest.xml
**<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />**