工具栏没有显示出来
我正在尝试实现Android工具栏。现在，当我打开我的应用程序时，它看起来像这样：
上面的标签不是来自工具栏。它是来自android的较旧版本的标签...我正在更新....
到目前为止，操作栏没有显示哪个是正确的，但工具栏也没有显示出来。这是我的代码：
MainDrawer2：
public class MainDrawer2 extends ActionBarActivity
{
private static final String EXTRA_NAV_ITEM = "extraNavItem";
private static final String STATE_CURRENT_NAV = "stateCurrentNav";
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private NavDrawerListAdapter mDrawerAdapter;
private ListView mDrawerList;
private CharSequence mTitle;
private CharSequence mDrawerTitle;
private MainNavItem mCurrentNavItem;
public static Intent createLaunchFragmentIntent(Context context, MainNavItem navItem)
{
return new Intent(context, MainDrawer2.class)
.putExtra(EXTRA_NAV_ITEM, navItem.ordinal());
}
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
//Crashlytics.start(this);
mTitle = mDrawerTitle = getTitle();
mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
mDrawerList = (ListView)findViewById(R.id.drawer);
// Set a toolbar to replace the action bar.
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//getActionBar().setDisplayHomeAsUpEnabled(true);
//enableHomeButtonIfRequired();
mDrawerAdapter = new NavDrawerListAdapter(getApplicationContext());
mDrawerList.setAdapter(mDrawerAdapter);
mDrawerList.setOnItemClickListener(new ListView.OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
displayNavFragment((MainNavItem)parent.getItemAtPosition(position));
}
});
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.app_name, R.string.app_name)
{
public void onDrawerClosed(View view)
{
//getActionBar().setTitle(mTitle);
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView)
{
//getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if(getIntent().hasExtra(EXTRA_NAV_ITEM)){
MainNavItem navItem = MainNavItem.values()
[getIntent().getIntExtra(EXTRA_NAV_ITEM,
MainNavItem.STATISTICS.ordinal())];
displayNavFragment(navItem);
}
else if(savedInstanceState != null){
mCurrentNavItem = MainNavItem.values()
[savedInstanceState.getInt(STATE_CURRENT_NAV)];
setCurrentNavItem(mCurrentNavItem);
}
else{
displayNavFragment(MainNavItem.STATISTICS);
}
}
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
private void enableHomeButtonIfRequired()
{
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH){
//getActionBar().setHomeButtonEnabled(true);
}
}
public void setActionBarTitle(String title) {
getActionBar().setTitle(title);
}
@Override
public void setTitle(CharSequence title)
{
mTitle = title;
//getActionBar().setTitle(mTitle);
}
@Override
protected void onPostCreate(Bundle savedInstanceState)
{
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig)
{
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
protected void onSaveInstanceState(Bundle outState)
{
super.onSaveInstanceState(outState);
if (mCurrentNavItem == null){
}
else{
outState.putInt(STATE_CURRENT_NAV, mCurrentNavItem.ordinal());
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
/*
@Override
public boolean onPrepareOptionsMenu(Menu menu)
{
// if nav drawer is opened, hide the action items
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
*/
private void displayNavFragment(MainNavItem navItem)
{
//if(navItem == mCurrentNavItem){
// return;
//}
Fragment fragment = Fragment.instantiate(this,
navItem.getFragClass().getName());
if(fragment != null){
getSupportFragmentManager().beginTransaction()
.replace(R.id.main, fragment)
.commit();
//setCurrentNavItem(navItem);
}
}
private void setCurrentNavItem(MainNavItem navItem)
{
int position = navItem.ordinal();
// If navItem is in DrawerAdapter
if(position >= 0 && position < mDrawerAdapter.getCount()){
//mDrawerList.setItemChecked(position, true);
}
else{
// navItem not in DrawerAdapter, de-select current item
if(mCurrentNavItem != null){
//mDrawerList.setItemChecked(mCurrentNavItem.ordinal(), false);
}
}
//test to keep item not selected
int toClear=mDrawerList.getCheckedItemPosition();
if (toClear >= 0) {
mDrawerList.setItemChecked(toClear, false);
}
mDrawerLayout.closeDrawer(mDrawerList);
//setTitle(navItem.getTitleResId());
mCurrentNavItem = navItem;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
if(mDrawerLayout.isDrawerOpen(mDrawerList)) {
mDrawerLayout.closeDrawer(mDrawerList);
}
else {
mDrawerLayout.openDrawer(mDrawerList);
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void goToSearch(MenuItem item){
//go to search page
Fragment Fragment_one;
FragmentManager man= getSupportFragmentManager();
FragmentTransaction tran = man.beginTransaction();
Fragment_one = new Search();
tran.replace(R.id.main, Fragment_one);//tran.
tran.addToBackStack(null);
tran.commit();
}
public void scanBarcode(MenuItem item){
//open scanner
IntentIntegrator scanIntegrator = new IntentIntegrator(this);
scanIntegrator.initiateScan();
}
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
//retrieve scan result
IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
if (scanningResult != null) {
//we have a result
String scanContent = scanningResult.getContents();
//todo: set scan content into setting, load new fragment which calls async task below. New
//todo: fragment will have same ui as search. :-)
Fragment Fragment_one;
FragmentManager man= this.getSupportFragmentManager();
FragmentTransaction tran = man.beginTransaction();
BarcodeFrag fragmentNew = new BarcodeFrag();
Bundle bundle = new Bundle();
bundle.putString("scanContent", scanContent);
fragmentNew.setArguments(bundle);
tran.replace(R.id.main, fragmentNew);//tran.
tran.addToBackStack(null);
//tran.commit();
tran.commitAllowingStateLoss();
}
else{
Toast toast = Toast.makeText(getApplicationContext(),
"No scan data received!", Toast.LENGTH_SHORT);
toast.show();
}
}
}
我的fragment_mail.xml：
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<FrameLayout
android:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:minHeight="?attr/actionBarSize"
android:background="#2196F3"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v7.widget.Toolbar>
</FrameLayout>
<ListView
android:id="@+id/drawer"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:divider="@android:color/white"
android:background="@android:color/black"
android:choiceMode="none"/>
</android.support.v4.widget.DrawerLayout>
我也在android studio中收到这个可能有关的错误：
3 个答案:
答案 0 :(得分：4)
致电时
getSupportFragmentManager().beginTransaction()
.replace(R.id.main, fragment)
.commit();
您正在使用片段替换@id/main中的所有内容 - 包括您的工具栏。相反，您的布局应该在工具栏下方有一个单独的FrameLayout，您可以将片段放入：
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:minHeight="?attr/actionBarSize"
android:background="#2196F3"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v7.widget.Toolbar>
<FrameLayout
android:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
</LinearLayout>
<ListView
android:id="@+id/drawer"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:divider="@android:color/white"
android:background="@android:color/black"
android:choiceMode="none"/>
</android.support.v4.widget.DrawerLayout>
答案 1 :(得分：0)
创建toolbar.xml
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/activity_my_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/PrimaryColor"
app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>
现在将此工具栏包含在布局文件中，如下所示
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/view"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="@+id/tool_bar"
layout="@layout/toolbar"></include>
<android.support.v4.widget.DrawerLayout
// Write your other code here
....
</android.support.v4.widget.DrawerLayout>
</RelativeLayout>
最后在MainDrawer2.java
toolbar = (Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
答案 2 :(得分：0)
只需将工具栏视图从片段framelayout移到外面。也许你的工具栏上有片段容器，你没看到它。您的代码中看到的小东西是您使用方法
public void setActionBarTitle(String title) {
getActionBar().setTitle(title);
}
当你使用工具栏时，你应该忘记了getActionBar（），但你应该使用getSupportActionBar（）。
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