[英]Open Navigation Drawer on HTML button click
我有一個打開導航抽屜的常規代碼。 我想在WebView
單擊HTML按鈕時打開相同的導航抽屜。 我可以使用WebAppInterface
在HTML按鈕上單擊Toast
或任何其他簡單功能。 但是在這種情況下如何打開抽屜?
HTML代碼:
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function showAndroidDialog() {
Luke.showDialog();
}
</script>
</head>
<body>
<h1>My Web Page</h1>
<p id="demo">Second Page</p>
<button type="button" onClick="showAndroidDialog()">OK</button>
</body>
</html>
RiverFragment.java
public class RiverFragment extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Retrieving the currently selected item number
int position = getArguments().getInt("position");
// List of rivers
String[] rivers = getResources().getStringArray(R.array.rivers);
// Creating view correspoding to the fragment
View v = inflater.inflate(R.layout.fragment_layout, container, false);
// Getting reference to the TextView of the Fragment
TextView tv = (TextView) v.findViewById(R.id.tv_content);
// Setting currently selected river name in the TextView
tv.setText(rivers[position]);
// Updating the action bar title
getActivity().getActionBar().setTitle(rivers[position]);
return v;
}
}
MainActivity.java
public class MainActivity extends Activity {
// Within which the entire activity is enclosed
DrawerLayout mDrawerLayout;
// ListView represents Navigation Drawer
ListView mDrawerList;
// ActionBarDrawerToggle indicates the presence of Navigation Drawer in the action bar
ActionBarDrawerToggle mDrawerToggle;
// Title of the action bar
String mTitle="";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTitle = (String) getTitle();
// Getting reference to the DrawerLayout
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.drawer_list);
// Getting reference to the ActionBarDrawerToggle
mDrawerToggle = new ActionBarDrawerToggle( this,
mDrawerLayout,
R.drawable.ic_drawer,
R.string.drawer_open,
R.string.drawer_close){
/** Called when drawer is closed */
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
invalidateOptionsMenu();
}
/** Called when a drawer is opened */
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle("Select a river");
invalidateOptionsMenu();
}
};
// Setting DrawerToggle on DrawerLayout
mDrawerLayout.setDrawerListener(mDrawerToggle);
// Creating an ArrayAdapter to add items to the listview mDrawerList
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
getBaseContext(),
R.layout.drawer_list_item ,
getResources().getStringArray(R.array.rivers)
);
// Setting the adapter on mDrawerList
mDrawerList.setAdapter(adapter);
// Enabling Home button
getActionBar().setHomeButtonEnabled(true);
// Enabling Up navigation
getActionBar().setDisplayHomeAsUpEnabled(true);
// Setting item click listener for the listview mDrawerList
mDrawerList.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent,
View view,
int position,
long id) {
// Getting an array of rivers
String[] rivers = getResources().getStringArray(R.array.rivers);
//Currently selected river
mTitle = rivers[position];
// Creating a fragment object
RiverFragment rFragment = new RiverFragment();
// Creating a Bundle object
Bundle data = new Bundle();
// Setting the index of the currently selected item of mDrawerList
data.putInt("position", position);
// Setting the position to the fragment
rFragment.setArguments(data);
// Getting reference to the FragmentManager
FragmentManager fragmentManager = getFragmentManager();
// Creating a fragment transaction
FragmentTransaction ft = fragmentManager.beginTransaction();
// Adding a fragment to the fragment transaction
ft.replace(R.id.content_frame, rFragment);
// Committing the transaction
ft.commit();
// Closing the drawer
mDrawerLayout.closeDrawer(mDrawerList);
}
});
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}
/** Handling the touch event of app icon */
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
/** Called whenever we call invalidateOptionsMenu() */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
// If the drawer is open, hide action items related to the content view
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
看看這個 。 我猜想使用一個onTouchListener()
和一個View
ID來攔截對WebView
上特定按鈕的調用,您可以做一個drawerLayout.openDrawer()
。
您可以通過界面本身實現相同的功能
JavaScriptInterface jsInterface = new JavaScriptInterface();
webView.getSettings().setJavaScriptEnabled(true);
webView.addJavascriptInterface(jsInterface, "Android");
接口類將是:
public class JavaScriptInterface {
public void openDrawer(){
yourdrawerlayout.open(Gravity.LEFT);
}
}
您需要從html調用此openDrawer
方法,如下所示
document.getElementById("button").addEventListener("click", function() {
Android.openDrawer();
});
您已經在HTML代碼中的Button click上定義了showAndroidDialog()
方法。
Luke.showDialog();
與android view組件進行交互。
因此,您必須在JavascriptInterface
調用showDialog()
方法以逐步打開抽屜
您可以像這樣添加JavascriptInterface
:
myWebView.addJavascriptInterface(new WebAppInterface(this), "Luke");
您的WebAppInterface應該是這樣的:
public class WebAppInterface {
Context mContext;
/** Instantiate the interface and set the context */
WebAppInterface(Context c) {
mContext = c;
}
@JavascriptInterface // must be added for API 17 or higher
public void showDialog() {
mDrawerLayout.openDrawer(Gravity.LEFT); // open navigation drawer
}
}
希望這可以幫助!
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