我无法在下面提供的自定义Web视图中实现mailto链接功能。请帮我混合这两个代码，我对android还是比较陌生的。我不知道如何实现mailto代码。
Stackoverflow解决方案：
邮寄代码
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.startsWith("mailto:")){
MailTo mt = MailTo.parse(url);
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("text/plain");
i.putExtra(Intent.EXTRA_EMAIL, new String[]{mt.getTo()});
i.putExtra(Intent.EXTRA_SUBJECT, mt.getSubject());
i.putExtra(Intent.EXTRA_CC, mt.getCc());
i.putExtra(Intent.EXTRA_TEXT, mt.getBody());
mContext.startActivity(i);
view.reload();
return true;
}
view.loadUrl(url);
return true;
}
我的密码
public class MainActivity extends Activity implements OnClickListener {
final Context context = this;
private WebView webView;
private ImageButton btnrefresh;
private TextView txtrefresh;
private Menu optionsMenu;
@SuppressWarnings("deprecation")
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//define button
btnrefresh = (ImageButton) findViewById(R.id.imageButton1);
btnrefresh.setOnClickListener(this);
btnrefresh.setVisibility(View.GONE);
//define textView
txtrefresh = (TextView)findViewById((R.id.textView1));
txtrefresh.setVisibility(View.GONE);
if(isConnected())
{
webView = (WebView) findViewById(R.id.webView1);
webView.getSettings().setJavaScriptEnabled(true);
// webView.getSettings().setPluginState(PluginState.ON);
webView.setWebViewClient(new WebViewClient());
initWebView(webView);
webView.loadUrl("xxxxx");
}
else
{
RelativeLayout rel = (RelativeLayout)findViewById(R.id.relativelayout1);
rel.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
refresh();
}
});
btnrefresh.setVisibility(View.VISIBLE);
txtrefresh.setVisibility(View.VISIBLE);
Toast.makeText(getBaseContext(), "No Internet Connection !!", Toast.LENGTH_SHORT).show();
}
}
public boolean onCreateOptionsMenu(Menu menu) {
this.optionsMenu = menu;
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_activity_actions, menu);
return super.onCreateOptionsMenu(menu);
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.airport_menuRefresh:
webView.reload();
Toast.makeText(getBaseContext(), "Refeshing...", Toast.LENGTH_SHORT).show();
// Complete with your code
return true;
case R.id.goBack:
if(webView.canGoBack()) {
webView.goBack();
}
return true;
case R.id.goForward:
if(webView.canGoForward()) {
webView.goForward();
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void refresh()
{
if (isConnected()) {
btnrefresh.setVisibility(View.GONE);
txtrefresh.setVisibility(View.GONE);
webView = (WebView) findViewById(R.id.webView1);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebViewClient(new WebViewClient());
initWebView(webView);
webView.loadUrl("xxxxxx");
Toast.makeText(getBaseContext(), "Connected !!", Toast.LENGTH_LONG).show();
Toast.makeText(getBaseContext(), "Loading....", Toast.LENGTH_SHORT).show();
Toast.makeText(getBaseContext(), "Please wait....", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getBaseContext(), "No Internet Connection !!", Toast.LENGTH_SHORT).show();
}
}
public boolean isConnected(){
ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Activity.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnected())
{
return true;
}
else
return false;
}
public void wifi()
{
WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
wifi.setWifiEnabled(true);
}
public void alertwifi()
{
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
// set title
alertDialogBuilder.setTitle("NO Internet Connection!!");
// set dialog message
alertDialogBuilder
.setMessage("Click below to turn on Wifi or Enable Data pack")
.setCancelable(false)
.setPositiveButton("Wifi",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, close
// current activity
wifi();
}
})
.setNeutralButton("GPRS",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, close
// current activity
datapack();
}
})
.setNegativeButton("Back",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
public void datapack()
{
try
{
ConnectivityManager dataManager;
dataManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
Method dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class);
dataMtd.setAccessible(true);
dataMtd.invoke(dataManager, true);
}
catch(Exception e)
{
e.printStackTrace();
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK)) {
AlertDialog.Builder alertbox = new AlertDialog.Builder(MainActivity.this);
alertbox.setTitle("Do You Want To Exit ?");
alertbox.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
// finish used for destroyed activity
exit();
}
});
alertbox.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
// Nothing will be happened when clicked on no button
// of Dialog
}
});
alertbox.show();
}
return super.onKeyDown(keyCode, event);
}
public void exit()
{
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
public void onClick(View v)
{
//refresh ImageButton function
if (v == btnrefresh)
{
refresh();
}
}
private final static Object methodInvoke(Object obj, String method, Class<?>[] parameterTypes, Object[] args) {
try {
Method m = obj.getClass().getMethod(method, new Class[] { boolean.class });
m.invoke(obj, args);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
private void initWebView(WebView webView) {
WebSettings settings = webView.getSettings();
settings.setJavaScriptEnabled(true);
settings.setAllowFileAccess(true);
settings.setDomStorageEnabled(true);
settings.setCacheMode(WebSettings.LOAD_NO_CACHE);
settings.setLoadWithOverviewMode(true);
settings.setUseWideViewPort(true);
settings.setSupportZoom(true);
// settings.setPluginsEnabled(true);
methodInvoke(settings, "setPluginsEnabled", new Class[] { boolean.class }, new Object[] { true });
// settings.setPluginState(PluginState.ON);
methodInvoke(settings, "setPluginState", new Class[] { PluginState.class }, new Object[] { PluginState.ON });
// settings.setPluginsEnabled(true);
methodInvoke(settings, "setPluginsEnabled", new Class[] { boolean.class }, new Object[] { true });
// settings.setAllowUniversalAccessFromFileURLs(true);
methodInvoke(settings, "setAllowUniversalAccessFromFileURLs", new Class[] { boolean.class }, new Object[] { true });
// settings.setAllowFileAccessFromFileURLs(true);
methodInvoke(settings, "setAllowFileAccessFromFileURLs", new Class[] { boolean.class }, new Object[] { true });
webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
webView.clearHistory();
webView.clearFormData();
webView.clearCache(true);
webView.setWebChromeClient(new MyWebChromeClient());
// webView.setDownloadListener(downloadListener);
}
UploadHandler mUploadHandler;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == Controller.FILE_SELECTED) {
// Chose a file from the file picker.
if (mUploadHandler != null) {
mUploadHandler.onResult(resultCode, intent);
}
}
super.onActivityResult(requestCode, resultCode, intent);
}
@SuppressLint("NewApi")
class MyWebChromeClient extends WebChromeClient {
public MyWebChromeClient() {
}
@SuppressLint("NewApi")
private String getTitleFromUrl(String url) {
String title = url;
try {
URL urlObj = new URL(url);
String host = urlObj.getHost();
if (host != null && !host.isEmpty()) {
return urlObj.getProtocol() + "://" + host;
}
if (url.startsWith("file:")) {
String fileName = urlObj.getFile();
if (fileName != null && !fileName.isEmpty()) {
return fileName;
}
}
} catch (Exception e) {
// ignore
}
return title;
}
@Override
public boolean onJsAlert(WebView view, String url, String message, final JsResult result) {
String newTitle = getTitleFromUrl(url);
new AlertDialog.Builder(MainActivity.this).setTitle(newTitle).setMessage(message).setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
result.confirm();
}
}).setCancelable(false).create().show();
return true;
// return super.onJsAlert(view, url, message, result);
}
@Override
public boolean onJsConfirm(WebView view, String url, String message, final JsResult result) {
String newTitle = getTitleFromUrl(url);
new AlertDialog.Builder(MainActivity.this).setTitle(newTitle).setMessage(message).setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
result.confirm();
}
}).setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
result.cancel();
}
}).setCancelable(false).create().show();
return true;
// return super.onJsConfirm(view, url, message, result);
}
// Android 2.x
public void openFileChooser(ValueCallback<Uri> uploadMsg) {
openFileChooser(uploadMsg, "");
}
// Android 3.0
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
openFileChooser(uploadMsg, "", "filesystem");
}
// Android 4.1
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
mUploadHandler = new UploadHandler(new Controller());
mUploadHandler.openFileChooser(uploadMsg, acceptType, capture);
}
};
class Controller {
final static int FILE_SELECTED = 4;
Activity getActivity() {
return MainActivity.this;
}
}
class UploadHandler {
/*
* The Object used to inform the WebView of the file to upload.
*/
private ValueCallback<Uri> mUploadMessage;
private String mCameraFilePath;
private boolean mHandled;
private boolean mCaughtActivityNotFoundException;
private Controller mController;
public UploadHandler(Controller controller) {
mController = controller;
}
String getFilePath() {
return mCameraFilePath;
}
boolean handled() {
return mHandled;
}
void onResult(int resultCode, Intent intent) {
if (resultCode == Activity.RESULT_CANCELED && mCaughtActivityNotFoundException) {
// Couldn't resolve an activity, we are going to try again so skip
// this result.
mCaughtActivityNotFoundException = false;
return;
}
Uri result = intent == null || resultCode != Activity.RESULT_OK ? null
: intent.getData();
// As we ask the camera to save the result of the user taking
// a picture, the camera application does not return anything other
// than RESULT_OK. So we need to check whether the file we expected
// was written to disk in the in the case that we
// did not get an intent returned but did get a RESULT_OK. If it was,
// we assume that this result has came back from the camera.
if (result == null && intent == null && resultCode == Activity.RESULT_OK) {
File cameraFile = new File(mCameraFilePath);
if (cameraFile.exists()) {
result = Uri.fromFile(cameraFile);
// Broadcast to the media scanner that we have a new photo
// so it will be added into the gallery for the user.
mController.getActivity().sendBroadcast(
new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, result));
}
}
mUploadMessage.onReceiveValue(result);
mHandled = true;
mCaughtActivityNotFoundException = false;
}
void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
final String imageMimeType = "image/*";
final String videoMimeType = "video/*";
final String audioMimeType = "audio/*";
final String mediaSourceKey = "capture";
final String mediaSourceValueCamera = "camera";
final String mediaSourceValueFileSystem = "filesystem";
final String mediaSourceValueCamcorder = "camcorder";
final String mediaSourceValueMicrophone = "microphone";
// According to the spec, media source can be 'filesystem' or 'camera' or 'camcorder'
// or 'microphone' and the default value should be 'filesystem'.
String mediaSource = mediaSourceValueFileSystem;
if (mUploadMessage != null) {
// Already a file picker operation in progress.
return;
}
mUploadMessage = uploadMsg;
// Parse the accept type.
String params[] = acceptType.split(";");
String mimeType = params[0];
if (capture.length() > 0) {
mediaSource = capture;
}
if (capture.equals(mediaSourceValueFileSystem)) {
// To maintain backwards compatibility with the previous implementation
// of the media capture API, if the value of the 'capture' attribute is
// "filesystem", we should examine the accept-type for a MIME type that
// may specify a different capture value.
for (String p : params) {
String[] keyValue = p.split("=");
if (keyValue.length == 2) {
// Process key=value parameters.
if (mediaSourceKey.equals(keyValue[0])) {
mediaSource = keyValue[1];
}
}
}
}
//Ensure it is not still set from a previous upload.
mCameraFilePath = null;
if (mimeType.equals(imageMimeType)) {
if (mediaSource.equals(mediaSourceValueCamera)) {
// Specified 'image/*' and requested the camera, so go ahead and launch the
// camera directly.
startActivity(createCameraIntent());
return;
} else {
// Specified just 'image/*', capture=filesystem, or an invalid capture parameter.
// In all these cases we show a traditional picker filetered on accept type
// so launch an intent for both the Camera and image/* OPENABLE.
Intent chooser = createChooserIntent(createCameraIntent());
chooser.putExtra(Intent.EXTRA_INTENT, createOpenableIntent(imageMimeType));
startActivity(chooser);
return;
}
} else if (mimeType.equals(videoMimeType)) {
if (mediaSource.equals(mediaSourceValueCamcorder)) {
// Specified 'video/*' and requested the camcorder, so go ahead and launch the
// camcorder directly.
startActivity(createCamcorderIntent());
return;
} else {
// Specified just 'video/*', capture=filesystem or an invalid capture parameter.
// In all these cases we show an intent for the traditional file picker, filtered
// on accept type so launch an intent for both camcorder and video/* OPENABLE.
Intent chooser = createChooserIntent(createCamcorderIntent());
chooser.putExtra(Intent.EXTRA_INTENT, createOpenableIntent(videoMimeType));
startActivity(chooser);
return;
}
} else if (mimeType.equals(audioMimeType)) {
if (mediaSource.equals(mediaSourceValueMicrophone)) {
// Specified 'audio/*' and requested microphone, so go ahead and launch the sound
// recorder.
startActivity(createSoundRecorderIntent());
return;
} else {
// Specified just 'audio/*', capture=filesystem of an invalid capture parameter.
// In all these cases so go ahead and launch an intent for both the sound
// recorder and audio/* OPENABLE.
Intent chooser = createChooserIntent(createSoundRecorderIntent());
chooser.putExtra(Intent.EXTRA_INTENT, createOpenableIntent(audioMimeType));
startActivity(chooser);
return;
}
}
// No special handling based on the accept type was necessary, so trigger the default
// file upload chooser.
startActivity(createDefaultOpenableIntent());
}
private void startActivity(Intent intent) {
try {
mController.getActivity().startActivityForResult(intent, Controller.FILE_SELECTED);
} catch (ActivityNotFoundException e) {
// No installed app was able to handle the intent that
// we sent, so fallback to the default file upload control.
try {
mCaughtActivityNotFoundException = true;
mController.getActivity().startActivityForResult(createDefaultOpenableIntent(),
Controller.FILE_SELECTED);
} catch (ActivityNotFoundException e2) {
// Nothing can return us a file, so file upload is effectively disabled.
Toast.makeText(mController.getActivity(), R.string.uploads_disabled,
Toast.LENGTH_LONG).show();
}
}
}
private Intent createDefaultOpenableIntent() {
// Create and return a chooser with the default OPENABLE
// actions including the camera, camcorder and sound
// recorder where available.
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");
Intent chooser = createChooserIntent(createCameraIntent(), createCamcorderIntent(),
createSoundRecorderIntent());
chooser.putExtra(Intent.EXTRA_INTENT, i);
return chooser;
}
private Intent createChooserIntent(Intent... intents) {
Intent chooser = new Intent(Intent.ACTION_CHOOSER);
chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, intents);
chooser.putExtra(Intent.EXTRA_TITLE,
mController.getActivity().getResources()
.getString(R.string.choose_upload));
return chooser;
}
private Intent createOpenableIntent(String type) {
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType(type);
return i;
}
private Intent createCameraIntent() {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File externalDataDir = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DCIM);
File cameraDataDir = new File(externalDataDir.getAbsolutePath() +
File.separator + "browser-photos");
cameraDataDir.mkdirs();
mCameraFilePath = cameraDataDir.getAbsolutePath() + File.separator +
System.currentTimeMillis() + ".jpg";
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(mCameraFilePath)));
return cameraIntent;
}
private Intent createCamcorderIntent() {
return new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
}
private Intent createSoundRecorderIntent() {
return new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
}
}
}
enter code here
我认为webView.setWebViewClient(new WebViewClient());这应该是这样的：
webView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.startsWith("tel:")) {
initiateCall(url);
return true;
}
if (url.startsWith("mailto:")) {
sendEmail(url.substring(7));
return true;
}
return false;
}
sendMail将为：
private void sendEmail(String add) {
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("text/plain");
i.putExtra(Intent.EXTRA_EMAIL, new String[] { add });
try {
startActivity(Intent.createChooser(i, "Send mail..."));
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(WebViewActivity.this,
"There are no email clients installed.", Toast.LENGTH_SHORT)
.show();
}
}
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