从webview中的相机上传图像不起作用 [英] upload image from camera in webview does not work
本文介绍了从webview中的相机上传图像不起作用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我一直试图在Workplace中从Facebook通过画廊和相机从Webview上传图像.
I've been trying to do an upload of images in Workplace from facebook through webview from gallery and from camera.
从图库中可以正常工作，但从相机上看，图像不会显示在上传文件中.
From gallery it works fine but from camera the image doesn't appear on the upload.
我已经看到过类似问题的帖子，例如 this 和此但我看不出有什么问题.
I've seen similar posts with this question like this and this but i don't see what's wrong.
这是我的课程:
public class WorkplaceActivity extends BaseActivity implements WorkplaceContract.View {
private WorkplacePresenter workplacePresenter;
private Tracker trackerGA;
private MyApplicaton appGA;
private Toolbar toolbar;
private WebView ctWebView;
private ValueCallback<Uri[]> mUploadMessage;
private final static int FILECHOOSER_RESULTCODE = 1;
private Uri mCameraURI;
@Override
public void setupWorkplace() {
WebViewClient webclient = new WebViewClient();
ctWebView = (WebView) findViewById(R.id.ctWebView);
ctWebView.getSettings().setAppCacheEnabled(true);
ctWebView.getSettings().setJavaScriptEnabled(true);
ctWebView.getSettings().setLoadWithOverviewMode(true);
ctWebView.getSettings().setAllowFileAccess(true);
ctWebView.setWebViewClient(webclient);
ctWebView.loadUrl(ConstantsStrings.WORKPLACE_URL);
}
@Override
public void setupGA() {
// Google Analytics
appGA = (MyApplicaton) getApplication();
trackerGA = appGA.getDefaultTracker();
sendGA(ConstantsStrings.WORKPLACE_GA_IN);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_workplace);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
workplacePresenter = new WorkplacePresenter();
workplacePresenter.attachView(this);
workplacePresenter.checkPermissions(WorkplaceActivity.this);
ActionBar actionBar = this.getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(false);
actionBar.setDisplayShowHomeEnabled(false);
actionBar.setHomeAsUpIndicator(R.drawable.ic_arrow_left);
actionBar.setTitle("");
// add back button
ImageButton back_button = (ImageButton) findViewById(R.id.back_button);
back_button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (ctWebView.canGoBack()) {
ctWebView.goBack();
}
Log.d("WORKPLACE", "click back");
}
});
// add close button
ImageButton close_button = (ImageButton) findViewById(R.id.close_button);
close_button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
Log.d("WORKPLACE", "click close");
}
});
}
setupGA();
setupWorkplace();
ctWebView.setWebChromeClient(new WebChromeClient() {
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
WorkplaceActivity.this.openFileChooser(filePathCallback);
return true;
}
});
}
@Override
public void onBackPressed() {
super.onBackPressed();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == FILECHOOSER_RESULTCODE) {
if (mUploadMessage != null) {
Uri[] temp = new Uri[1];
if (intent != null && intent.getData() != null) {
temp[0] = intent.getData();
} else if (mCameraURI != null) {
temp[0] = mCameraURI;
}
mUploadMessage.onReceiveValue(temp);
mUploadMessage = null;
}
}
}
public static Intent newInstance(Context context) {
return new Intent(context, WorkplaceActivity.class);
}
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
workplacePresenter.attachView(this);
}
@Override
public void onDetachedFromWindow() {
super.onDetachedFromWindow();
workplacePresenter.detachView();
}
@Override
public void showLoading() {
}
@Override
public void hideLoading() {
}
@Override
public void sendGA(String msg) {
// Google Analytics
trackerGA = appGA.getDefaultTracker();
trackerGA.setScreenName(msg);
trackerGA.send(new HitBuilders.ScreenViewBuilder().build());
}
private void openFileChooser(ValueCallback<Uri[]> uploadMsg) {
mUploadMessage = uploadMsg;
try {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
ActivityCompat.requestPermissions(WorkplaceActivity.this, new String[]{Manifest.permission.CAMERA}, FILECHOOSER_RESULTCODE);
ActivityCompat.requestPermissions(WorkplaceActivity.this, new String[]{Manifest.permission_group.STORAGE}, 6);
ActivityCompat.requestPermissions(WorkplaceActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 5);
File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
File cameraDir = new File(storageDir.getAbsolutePath() + File.separator + "browser-photos");
cameraDir.mkdirs();
String mCameraFilePath = cameraDir.getAbsolutePath() + File.separator + ".jpg";
mCameraURI = Uri.fromFile(new File(mCameraFilePath));
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCameraURI);
Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
contentSelectionIntent.setType("image/*");
Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[]{takePictureIntent});
startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
} catch (Exception e) {
Toast.makeText(getBaseContext(), "Camera Exception:" + e, Toast.LENGTH_LONG);
}
}
当我尝试从相机上传图像时，我的手机会保存图像，但它不会出现在上传屏幕上.
When i do try to upload an image from the camera, my phone saves the image but it does not appear on the upload screen.
推荐答案
检查它是否对我有用.
public class MainActivity extends Activity {
private WebView webView;
private ValueCallback<Uri> mUploadMessage;
private ValueCallback<Uri[]> mUploadMessages;
private Uri mCapturedImageURI = null;
private static final int MY_CAMERA_REQUEST_CODE = 100;
private static final int FILECHOOSER_RESULTCODE = 1;
@RequiresApi(api = Build.VERSION_CODES.M)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = findViewById(R.id.webView);
webView.setWebViewClient(new WebViewClient());
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setDomStorageEnabled(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setPluginState(WebSettings.PluginState.ON);
webView.getSettings().setAppCacheEnabled(false);
webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
webView.getSettings().setUseWideViewPort(true);
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setBuiltInZoomControls(false);
webView.getSettings().setSupportZoom(false);
webView.getSettings().setDefaultZoom(WebSettings.ZoomDensity.FAR);
webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setDatabaseEnabled(true);
webView.getSettings().setDatabasePath("/data/data/" + webView.getContext().getPackageName() + "/databases/");
webView.loadUrl("url");
webView.setWebChromeClient(new WebChromeClient() {
// For api level bellow 24
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.startsWith("http")) {
// Return false means, web view will handle the link
return false;
}
return false;
}
// From api level 24
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
/*Toast.makeText(mcontext, "New Method",Toast.LENGTH_SHORT).show();*/
// Get the tel: url
String url = request.getUrl().toString();
if (url.startsWith("http")) {
// Return false means, web view will handle the link
return false;
}
return false;
}
// openFileChooser for Android 3.0+
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
mUploadMessage = uploadMsg;
openImageChooser();
}
// For Lollipop 5.0+ Devices
public boolean onShowFileChooser(WebView mWebView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
mUploadMessages = filePathCallback;
openImageChooser();
return true;
}
// 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);
}
});
}
private void openImageChooser() {
try {
File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "FolderName");
if (!imageStorageDir.exists()) {
imageStorageDir.mkdirs();
}
File file = new File(imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg");
mCapturedImageURI = Uri.fromFile(file);
final Intent captureIntent = new Intent(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/*");
Intent chooserIntent = Intent.createChooser(i, "Image Chooser");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Parcelable[]{captureIntent});
startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
if (requestCode == FILECHOOSER_RESULTCODE) {
if (null == this.mUploadMessage && null == this.mUploadMessages) {
return;
}
/* Uri result;
if (requestCode != RESULT_OK){
result = null;
}else {
result = intent == null ? this.mCapturedImageURI : intent.getData();
}
this.mUploadMessage.onReceiveValue(result);
this.mUploadMessage = null;*/
if (null != mUploadMessage) {
handleUploadMessage(requestCode, resultCode, intent);
} else if (mUploadMessages != null) {
handleUploadMessages(requestCode, resultCode, intent);
}
}
}
private void handleUploadMessage(int requestCode, int resultCode, Intent intent) {
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) {
e.printStackTrace();
}
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void handleUploadMessages(int requestCode, int resultCode, Intent intent) {
Uri[] results = null;
try {
if (resultCode != RESULT_OK) {
results = null;
} else {
if (intent != null) {
String dataString = intent.getDataString();
ClipData clipData = intent.getClipData();
if (clipData != null) {
results = new Uri[clipData.getItemCount()];
for (int i = 0; i < clipData.getItemCount(); i++) {
ClipData.Item item = clipData.getItemAt(i);
results[i] = item.getUri();
}
}
if (dataString != null) {
results = new Uri[]{Uri.parse(dataString)};
}
} else {
results = new Uri[]{mCapturedImageURI};
}
}
} catch (Exception e) {
e.printStackTrace();
}
mUploadMessages.onReceiveValue(results);
mUploadMessages = null;
}
}
这篇关于从webview中的相机上传图像不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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