启动应用时，汉堡包图标未显示。但是，抽屉的代码正常工作，我需要点击左上角。
我已经在stackoverflow上查看了几个解决方案，但都没有工作。这是一个好方法吗？我不是在其他页面中添加此抽屉，仅在主活动中添加。
抽屉活动
package co.abc.www.def.activity;
import android.content.Intent;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.app.ActionBarDrawerToggle;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.FrameLayout;
import android.widget.ListView;
import co.abc.www.def.R;
public class DrawerActivity extends AppCompatActivity {
protected FrameLayout frameLayout;
protected ListView mDrawerList;
protected String[] listArray = {"Home","Tips", "Selfie"};
protected static int position;
/**
* This flag is used just to check that launcher activity is called first time
* so that we can open appropriate Activity on launch and make list item position selected accordingly.
* */
private static boolean isLaunch = true;
protected DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle actionBarDrawerToggle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_drawer);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
if (toolbar != null) {
setSupportActionBar(toolbar);
}
frameLayout = (FrameLayout)findViewById(R.id.content_frame);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
// set a custom shadow that overlays the main content when the drawer opens
//mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
// set up the drawer's list view with items and click listener
mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, listArray));
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
openActivity(position);
}
});
// enable ActionBar app icon to behave as action to toggle nav drawer
assert getSupportActionBar()!=null;
getSupportActionBar().setHomeButtonEnabled(false);
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_drawer);
actionBarDrawerToggle = new ActionBarDrawerToggle(
this,
mDrawerLayout,
R.string.drawer_open,
R.string.drawer_close){
@Override
public void onDrawerClosed(View drawerView) {
getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_drawer);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
super.onDrawerClosed(drawerView);
}
@Override
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(getString(R.string.app_name));
getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_hamburger);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
super.onDrawerOpened(drawerView);
}
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
super.onDrawerSlide(drawerView, slideOffset);
}
@Override
public void onDrawerStateChanged(int newState) {
super.onDrawerStateChanged(newState);
}
};
actionBarDrawerToggle.syncState();
mDrawerLayout.setDrawerListener(actionBarDrawerToggle);
/**
* As we are calling BaseActivity from manifest file and this base activity is intended just to add navigation drawer in our app.
* We have to open some activity with layout on launch. So we are checking if this BaseActivity is called first time then we are opening our first activity.
* */
if(isLaunch){
/**
*Setting this flag false so that next time it will not open our first activity.
*We have to use this flag because we are using this BaseActivity as parent activity to our other activity.
*In this case this base activity will always be call when any child activity will launch.
*/
isLaunch = false;
openActivity(0);
}
}
protected void openActivity(int position){
/**
* We can set title & itemChecked here but as this BaseActivity is parent for other activity,
* So whenever any activity is going to launch this BaseActivity is also going to be called and
* it will reset this value because of initialization in onCreate method.
* So that we are setting this in child activity.
*/
//mDrawerList.setItemChecked(position, true);
//setTitle(listArray[position]);
mDrawerLayout.closeDrawer(mDrawerList);
DrawerActivity.position=position;
switch(position){
case 0:
startActivity(new Intent(this, MainActivity.class));
break;
case 1:
startActivity(new Intent(this, FavouriteTipsActivity.class));
break;
case 2:
startActivity(new Intent(this, SelfieActivity.class));
break;
default:
break;
}
}
/*
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_drawer, menu);
return super.onCreateOptionsMenu(menu);
}*/
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// The action bar home/up action should open or close the drawer.
// ActionBarDrawerToggle will take care of this.
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
switch (item.getItemId()) {
case R.id.action_settings:
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/* Called whenever we call invalidateOptionsMenu() */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
// If the nav 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);
}
/* We can override onBackPressed method to toggle navigation drawer*/
@Override
public void onBackPressed() {
if(mDrawerLayout.isDrawerOpen(mDrawerList)){
mDrawerLayout.closeDrawer(mDrawerList);
}else {
finish();
}
}
}
抽屉XML
<!--
Base activity layout for adding Navigation Drawer in our application.
We will use this layout in BaseActivity for showing navigation drawer and Navigation List Item.
We are going to extend our all the Activities from this BaseActivty so by default every activity will have this layout.
For adding other layout in our activty we have to use below "FrameLayout", as we can not add "setContentView" in this activities.
We will use layout inflater to add our layout in below framelayout.
Code example is below:::::
getLayoutInflater().inflate(R.layout.activity_main, frameLayout);
-->
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:minHeight="?attr/actionBarSize"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/Home_screen_maroon">
</android.support.v7.widget.Toolbar>
</FrameLayout>
<ListView
android:id="@+id/left_drawer"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="@color/Home_screen_maroon"
android:choiceMode="none"
android:divider="@android:color/transparent"
android:dividerHeight="0dp" />
</android.support.v4.widget.DrawerLayout>
主要活动将从抽屉活动继承而且失败
package co.abc.www.def.activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Environment;
import android.support.v7.widget.Toolbar;
import android.text.Html;
import android.view.ContextThemeWrapper;
import android.view.View;
import co.abc.www.def.R;
import android.widget.TextView;
import java.io.File;
import java.io.IOException;
import java.text.DateFormat;
import java.text.DecimalFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Timer;
import java.util.TimerTask;
public class MainActivity extends DrawerActivity {
private TextView tv;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
getLayoutInflater().inflate(R.layout.activity_main, frameLayout);
tv=(TextView)findViewById(R.id.tv);
}
@Override
protected void onStart() {
super.onStart();
}
@Override
public void onResume() {
super.onResume();
}
@Override
protected void onPause() {
super.onPause();
}
@Override
protected void onStop() {
super.onStop();
}
}
Main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
android:background="@color/Home_screen_bg"
tools:context="co.abc.www.def.activity.MainActivity"
android:id="@+id/relative_layout_main"
android:orientation="vertical">
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:gravity="center"
android:textSize="@dimen/fourteen_sp"
android:textStyle="bold"
android:textColor="@color/black" />
</LinearLayout>