我做了一个导航抽屉，就像developer.android.com网站上的教程中显示的那样。但是现在，我想使用一个导航抽屉，我在NavigationDrawer.class中创建了多个活动在我的应用程序。
我的问题是，这里是否有人可以做一个小教程，它解释了如何使用一个导航抽屉的多个活动。
我第一次读到这个答案
Android导航抽屉在多个活动
但在我的项目上行不通
public class NavigationDrawer extends Activity {
public DrawerLayout drawerLayout;
public ListView drawerList;
private ActionBarDrawerToggle drawerToggle;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
drawerToggle = new ActionBarDrawerToggle((Activity) this, drawerLayout, R.drawable.ic_drawer, 0, 0) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(R.string.app_name);
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(R.string.menu);
}
};
drawerLayout.setDrawerListener(drawerToggle);
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
listItems = getResources().getStringArray(R.array.layers_array);
drawerList = (ListView) findViewById(R.id.left_drawer);
drawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, android.R.id.text,
listItems));
drawerList.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int pos, long arg3) {
drawerClickEvent(pos);
}
});
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (drawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
drawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
drawerToggle.onConfigurationChanged(newConfig);
}
}
在这个活动中，我想有导航抽屉，所以我扩展了'NavigationDrawer'，在其他一些活动中，我想使用相同的导航抽屉
public class SampleActivity extends NavigationDrawer {...}
我在Kotlin是这样做的:
open class BaseAppCompatActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {
protected lateinit var drawerLayout: DrawerLayout
protected lateinit var navigationView: NavigationView
@Inject
lateinit var loginService: LoginService
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
Log.d("BaseAppCompatActivity", "onCreate()")
App.getComponent().inject(this)
drawerLayout = findViewById(R.id.drawer_layout) as DrawerLayout
val toolbar = findViewById(R.id.toolbar) as Toolbar
setSupportActionBar(toolbar)
navigationView = findViewById(R.id.nav_view) as NavigationView
navigationView.setNavigationItemSelectedListener(this)
val toggle = ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close)
drawerLayout.addDrawerListener(toggle)
toggle.syncState()
toggle.isDrawerIndicatorEnabled = true
val navigationViewHeaderView = navigationView.getHeaderView(0)
navigationViewHeaderView.login_txt.text = SharedKey.username
}
private inline fun <reified T: Activity> launch():Boolean{
if(this is T) return closeDrawer()
val intent = Intent(applicationContext, T::class.java)
startActivity(intent)
finish()
return true
}
private fun closeDrawer(): Boolean {
drawerLayout.closeDrawer(GravityCompat.START)
return true
}
override fun onNavigationItemSelected(item: MenuItem): Boolean {
val id = item.itemId
when (id) {
R.id.action_tasks -> {
return launch<TasksActivity>()
}
R.id.action_contacts -> {
return launch<ContactActivity>()
}
R.id.action_logout -> {
createExitDialog(loginService, this)
}
}
return false
}
}
抽屉的活动必须继承这个BaseAppCompatActivity，调用super。onCreate在内容设置后(实际上，可以移动到一些init方法)，并在布局中有对应的id元素
在一组活动中重用公共导航抽屉的最简单方法
app_base_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
android:id="@+id/drawer_layout"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<FrameLayout
android:id="@+id/view_stub"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
<android.support.design.widget.NavigationView
android:id="@+id/navigation_view"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
app:menu="@menu/menu_test"
/>
</android.support.v4.widget.DrawerLayout>
AppBaseActivity.java
/*
* This is a simple and easy approach to reuse the same
* navigation drawer on your other activities. Just create
* a base layout that conains a DrawerLayout, the
* navigation drawer and a FrameLayout to hold your
* content view. All you have to do is to extend your
* activities from this class to set that navigation
* drawer. Happy hacking :)
* P.S: You don't need to declare this Activity in the
* AndroidManifest.xml. This is just a base class.
*/
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
public abstract class AppBaseActivity extends AppCompatActivity implements MenuItem.OnMenuItemClickListener {
private FrameLayout view_stub; //This is the framelayout to keep your content view
private NavigationView navigation_view; // The new navigation view from Android Design Library. Can inflate menu resources. Easy
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
private Menu drawerMenu;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.app_base_layout);// The base layout that contains your navigation drawer.
view_stub = (FrameLayout) findViewById(R.id.view_stub);
navigation_view = (NavigationView) findViewById(R.id.navigation_view);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, 0, 0);
mDrawerLayout.setDrawerListener(mDrawerToggle);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
drawerMenu = navigation_view.getMenu();
for(int i = 0; i < drawerMenu.size(); i++) {
drawerMenu.getItem(i).setOnMenuItemClickListener(this);
}
// and so on...
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
/* Override all setContentView methods to put the content view to the FrameLayout view_stub
* so that, we can make other activity implementations looks like normal activity subclasses.
*/
@Override
public void setContentView(int layoutResID) {
if (view_stub != null) {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT);
View stubView = inflater.inflate(layoutResID, view_stub, false);
view_stub.addView(stubView, lp);
}
}
@Override
public void setContentView(View view) {
if (view_stub != null) {
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT);
view_stub.addView(view, lp);
}
}
@Override
public void setContentView(View view, ViewGroup.LayoutParams params) {
if (view_stub != null) {
view_stub.addView(view, params);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Pass the event to ActionBarDrawerToggle, if it returns
// true, then it has handled the app icon touch event
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle your other action bar items...
return super.onOptionsItemSelected(item);
}
@Override
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()) {
case R.id.item1:
// handle it
break;
case R.id.item2:
// do whatever
break;
// and so on...
}
return false;
}
}
