[Android] WebView custom browser

• Android

Add < EditText / > and < button / > controls to the layout file,

Add a < WebView / > control to the layout file

Get WebView object in activity

Call the loadurl() method of WebView object, parameter: string path

Add permission to access the network android.permission.internet

Call the getsettings () method of the WebView object to get the websettings setting object

Call the setsupportzoom() method of the websettings object to set the support zoom. Parameter: Boolean

Call setbuiltinzoomcontrols() of websettings object to set the zoom control. Parameters: Boolean

Call the setwebviewclient() method of WebView object to set the client to prevent the link from opening the system browser. Parameter: webviewclient object

Monitor the back key to return to the previous interface

Override the onkeydown () method of the activity, and pass in the int keyboard code and keyevent object as parameters

If the keyboard code is equal to keyevent.keycode_ Back and there are many pages in the current WebView object that can go back. Call the cangoback () method of the WebView object

Call the goback () method of WebView object, and the page goes back

Set the menu key, override the oncreateoptionsmenu() method, and pass in the menu object

Call the addsubmenu() method of the menu object to add the menu. Parameters: group ID, item ID, sorting, title

Add refresh, back, forward

Listen for small menu click events

Override the onoptionsitemselected () method and pass in the MenuItem object

Switch judge the getorder () of the MenuItem object, which corresponds to the above sort

Page refresh, call the reload () method of WebView object

When the page goes back, first call the cangoback () method of WebView object to judge whether it can go back, and call the goback () method to go back

When the page advances, call the cangoforward () method of WebView object to judge whether it can advance, and call the goforward () method to advance

Page loading

Get the ProgressDialog object and new it. Parameter: Context

Call the setmessage() method of the ProgressDialog object, parameter: Text

Call setwebchromeclient() method of WebView object. Parameters: webviewclient object,

The anonymous inner class inherits the webviewclient class and overrides the onpagestarted () method and onpagefound () method

Within the onpagestarted() method

Call the show() method of the ProgressDialog object

Within the onpagefound() method

Call the disass() method of the ProgressDialog object

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