我已经尽一切努力让我的“前进”和“后退”发挥作用。
刷新正在工作[我通过将方法更改为“webView.reload();”来解决这个问题 而不是 'webView.refresh();'
任何人都可以协助前进和后退吗?我试过'forward'、'canGoForward'和'goForward'以及'back'、'canGoBack'和'goBack'。没有错误代码,但是这些方法实际上都没有做任何事情。
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu); // Add menu items, second value is the id, use this in the onCreateOptionsMenu
menu.add(0, 1, 0, "Back");
menu.add(0, 2, 0, "Refresh");
menu.add(0, 3, 0, "Forward");
return true; // End of menu configuration
}
public boolean onOptionsItemSelected(MenuItem item){ // Called when you tap a menu item
switch (item.getItemId()){
case 1: //If the ID equals 1, go back
webView.goBack();
return true;
case 2 : //If the ID equals 2, refresh
webView.reload();
return true;
case 3: //If the ID equals 3, go forward
webView.goForward();
return true;
}
return false;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) { // Enables browsing to previous pages with the hardware back button
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) { // Check if the key event was the BACK key and if there's history
webView.goBack();
return true;
} // If it wasn't the BACK key or there's no web page history, bubble up to the default
// system behavior (probably exit the activity)
return super.onKeyDown(keyCode, event);
}
}