大家好,我实现了一个抽屉布局的演示应用程序,适用于所有Android设备。
主类如下:
import java.util.Locale;
import android.app.SearchManager;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mPlanetTitles;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.drawer_main);
mTitle = mDrawerTitle = getTitle();
mPlanetTitles = getResources().getStringArray(R.array.planets_array);
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, mPlanetTitles));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
// enable ActionBar app icon to behave as action to toggle nav drawer
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the sliding drawer and the action bar app icon
mDrawerToggle = new ActionBarDrawerToggle(
this, /* host Activity */
mDrawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description for accessibility */
R.string.drawer_close /* "close drawer" description for accessibility */
) {
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
/* 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_websearch).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(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 (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle action buttons
switch(item.getItemId()) {
case R.id.action_websearch:
// create intent to perform web search for this planet
Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
intent.putExtra(SearchManager.QUERY, getSupportActionBar().getTitle());
// catch event that there's no activity to handle intent
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
} else {
Toast.makeText(this, R.string.app_not_available, Toast.LENGTH_LONG).show();
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/* The click listner for ListView in the navigation drawer */
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
}
private void selectItem(int position) {
// update the main content by replacing fragments
Fragment fragment = new PlanetFragment();
Bundle args = new Bundle();
args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
fragment.setArguments(args);
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
setTitle(mPlanetTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
@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 toggls
mDrawerToggle.onConfigurationChanged(newConfig);
}
/**
* Fragment that appears in the "content_frame", shows a planet
*/
public static class PlanetFragment extends Fragment {
public static final String ARG_PLANET_NUMBER = "planet_number";
public PlanetFragment() {
// Empty constructor required for fragment subclasses
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_planet, container, false);
int i = getArguments().getInt(ARG_PLANET_NUMBER);
String planet = getResources().getStringArray(R.array.planets_array)[i];
int imageId = getResources().getIdentifier(planet.toLowerCase(Locale.getDefault()),
"drawable", getActivity().getPackageName());
((ImageView) rootView.findViewById(R.id.image)).setImageResource(imageId);
getActivity().setTitle(planet);
return rootView;
}
}
}
我的drawer_main.xml如下:
<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">
<!-- As the main content view, the view below consumes the entire
space available using match_parent in both dimensions. -->
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- android:layout_gravity="start" tells DrawerLayout to treat
this as a sliding drawer on the left side for left-to-right
languages and on the right side for right-to-left languages.
The drawer is given a fixed width in dp and extends the full height of
the container. A solid background is used for contrast
with the content view. -->
<ListView
android:id="@+id/left_drawer"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:choiceMode="singleChoice"
android:divider="@android:color/transparent"
android:dividerHeight="0dp"
android:background="#111"/>
</android.support.v4.widget.DrawerLayout>
我的menifest.xml如下所示:
<?xml version="1.0" encoding="utf-8"?>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<supports-screens
android:smallScreens="true"
android:normalScreens="true"
android:largeScreens="true"
android:xlargeScreens="true"
android:anyDensity="true"
/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.appcompactdemo.MainActivity"
android:label="@string/app_name"
android:theme="@style/Theme.AppCompat.Light.DarkActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
我使用的是Android支持库,根据操作栏文档,它适用于2.1或更高版本的设备,但在上面的例子中,在4.0设备上可以工作,在2.3设备上会出现以下错误:
07-27 08:46:56.037: E/AndroidRuntime(616): FATAL EXCEPTION: main
07-27 08:46:56.037: E/AndroidRuntime(616): android.view.InflateException: Binary XML file line #17: Error inflating class <unknown>
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.LayoutInflater.createView(LayoutInflater.java:518)
07-27 08:46:56.037: E/AndroidRuntime(616): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:568)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.LayoutInflater.inflate(LayoutInflater.java:386)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:332)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.AbsListView.obtainView(AbsListView.java:1430)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.ListView.makeAndAddView(ListView.java:1745)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.ListView.fillDown(ListView.java:670)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.ListView.fillFromTop(ListView.java:727)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.ListView.layoutChildren(ListView.java:1598)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.AbsListView.onLayout(AbsListView.java:1260)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.View.layout(View.java:7175)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:702)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.View.layout(View.java:7175)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.View.layout(View.java:7175)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1254)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1130)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.LinearLayout.onLayout(LinearLayout.java:1047)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.View.layout(View.java:7175)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.View.layout(View.java:7175)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.View.layout(View.java:7175)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.ViewRoot.performTraversals(ViewRoot.java:1140)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.os.Handler.dispatchMessage(Handler.java:99)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.os.Looper.loop(Looper.java:130)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.app.ActivityThread.main(ActivityThread.java:3683)
07-27 08:46:56.037: E/AndroidRuntime(616): at java.lang.reflect.Method.invokeNative(Native Method)
07-27 08:46:56.037: E/AndroidRuntime(616): at java.lang.reflect.Method.invoke(Method.java:507)
07-27 08:46:56.037: E/AndroidRuntime(616): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-27 08:46:56.037: E/AndroidRuntime(616): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-27 08:46:56.037: E/AndroidRuntime(616): at dalvik.system.NativeStart.main(Native Method)
07-27 08:46:56.037: E/AndroidRuntime(616): Caused by: java.lang.reflect.InvocationTargetException
07-27 08:46:56.037: E/AndroidRuntime(616): at java.lang.reflect.Constructor.constructNative(Native Method)
07-27 08:46:56.037: E/AndroidRuntime(616): at java.lang.reflect.Constructor.newInstance(Constructor.java:415)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.LayoutInflater.createView(LayoutInflater.java:505)
07-27 08:46:56.037: E/AndroidRuntime(616): ... 35 more
07-27 08:46:56.037: E/AndroidRuntime(616): Caused by: android.content.res.Resources$NotFoundException: Resource is not a Drawable (color or path): TypedValue{t=0x2/d=0x10102fd a=-1}
07-27 08:46:56.037: E/AndroidRuntime(616): at android.content.res.Resources.loadDrawable(Resources.java:1681)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.content.res.TypedArray.getDrawable(TypedArray.java:601)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.view.View.<init>(View.java:1951)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.TextView.<init>(TextView.java:350)
07-27 08:46:56.037: E/AndroidRuntime(616): at android.widget.TextView.<init>(TextView.java:343)
07-27 08:46:56.037: E/AndroidRuntime(616): ... 38 more
有什么想法可以解决这个问题吗?
android:textAppearance="?android:attr/textAppearanceListItemSmall" android:background="?android:attr/activatedBackgroundIndicator" android:minHeight="?android:attr/listPreferredItemHeightSmall"
有关,这是他们用作示例的。还不确定如何修复它...正在努力解决。 - Jon Adams@style/Theme.AppCompat.Light.DarkActionBar
。将其设置为@style/Theme.AppCompat.Light
可以解决我的问题。 - yadutaf