我有一个简单的登录页面，其中一半的页面由2 EditText和Button占用，后半部分由ListFragment显示公共项目。我为导航抽屉创建了一个单独的类，以便将来我可以在每个活动上显示这个导航抽屉。以下是 DrawerActivity.java的代码：
public class DrawerActivity extends ActionBarActivity {
private ListView mDrawerList;
private ArrayAdapter<String> mAdapter;
private DrawerLayout mDrawerLayout;
private String mActivityTitle;
private ActionBarDrawerToggle mDrawerToggle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.drawer_layout);
mDrawerList = (ListView)findViewById(R.id.left_drawer);
mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
mActivityTitle = getTitle().toString();
addDrawerItems();
setupDrawer();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
private void addDrawerItems() {
String[] osArray = { "Android", "iOS", "Windows", "OS X", "Linux" };
mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, osArray);
mDrawerList.setAdapter(mAdapter);
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(DrawerActivity.this, "Time for an upgrade!", Toast.LENGTH_SHORT).show();
}
});
}
private void setupDrawer() {
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,R.drawable.ic_drawer,
R.string.drawer_open, R.string.drawer_close) {
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getSupportActionBar().setTitle("Navigation!");
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getSupportActionBar().setTitle(mActivityTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerToggle.setDrawerIndicatorEnabled(true);
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
@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);
mDrawerToggle.onConfigurationChanged(newConfig);
}
@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_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
// Activate the navigation drawer toggle
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
MainActivity.java：
public class MainActivity extends DrawerActivity {
AutoCompleteTextView email;
EditText password;
Button submit;
String getEmail, getPassword;
public static HttpClient httpClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
email = (AutoCompleteTextView) findViewById(R.id.get_email);
password = (EditText) findViewById(R.id.get_password);
submit = (Button) findViewById(R.id.login_register);
Fragment fr = new PublicProjectsFragment();
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.publicProjectFragment, fr).commit();
/*Typeface customFont = Typeface.createFromAsset(getAssets(), "fonts/titillium.otf");
email.setTypeface(customFont);
password.setTypeface(customFont);*/
submit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getEmail = email.getText().toString();
getPassword = password.getText().toString();
new HttpHandler().execute();
}
});
}
@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_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
private class HttpHandler extends AsyncTask<String, Void, Void> {
@Override
protected Void doInBackground(String... params) {
String url = "http://canvasflip.com/protected/actions/user.php?action=login";
String responseStr = "";
httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
try {
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);
nameValuePair.add(new BasicNameValuePair("loginId", getEmail));
nameValuePair.add(new BasicNameValuePair("password", getPassword));
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
responseStr = EntityUtils.toString(httpEntity);
JSONObject jsonObject = new JSONObject(responseStr);
final String jsonResult = jsonObject.getString("result");
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (jsonResult.equals("success")) {
Intent i = new Intent(getBaseContext(), ProjectListActivity.class);
startActivity(i);
} else {
AlertDialog.Builder loginFailAlert = new AlertDialog.Builder(MainActivity.this);
loginFailAlert.setTitle("Login Failed");
loginFailAlert.setMessage("Wrong e-mail address or password, please enter again").setCancelable(false).
setNeutralButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
email.setText("");
password.setText("");
dialog.cancel();
}
});
AlertDialog alertDialog = loginFailAlert.create();
alertDialog.show();
}
}
});
} catch (Exception e) {
System.out.println(e.getMessage());
}
return null;
}
}
}
ProjectListFragment.java：显示ListFragment
public class PublicProjectsFragment extends ListFragment {
String[] projectTitle;
String[] projectImage;
CustomAdapter adapter;
private List<RowItem> rowItems;
String imgUrl = "http://canvasflip.com/protected/app/elements/userElements/";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_public_projects,null, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
projectTitle = getResources().getStringArray(R.array.projectTitle);
projectImage = getResources().getStringArray(R.array.publicProjectPreview);
rowItems = new ArrayList<RowItem>();
for(int i=0; i<projectTitle.length; i++) {
String url = imgUrl+projectImage[i]+".png";
RowItem item = new RowItem(projectTitle[i], url);
rowItems.add(item);
}
adapter = new CustomAdapter(getActivity(), rowItems);
setListAdapter(adapter);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Intent intent;
switch (position) {
case 0: intent = new Intent(getActivity(), PlayBack.class);
intent.putExtra("playUrl", "http://canvasflip.com/protected/app/playback.php?project=694");
startActivity(intent);
break;
case 1: intent = new Intent(getActivity(), PlayBack.class);
intent.putExtra("playUrl", "http://canvasflip.com/protected/app/playback.php?project=696");
startActivity(intent);
break;
case 2: intent = new Intent(getActivity(), PlayBack.class);
intent.putExtra("playUrl", "http://canvasflip.com/protected/app/playback.php?project=697");
startActivity(intent);
break;
case 3: intent = new Intent(getActivity(), PlayBack.class);
intent.putExtra("playUrl", "http://canvasflip.com/protected/app/playback.php?project=777");
startActivity(intent);
break;
}
}
}
activity_main.xml中
<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"
tools:context=".MainActivity"
android:background="#eeeeee"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dip"
android:orientation="vertical"
android:layout_marginTop="10dip"
android:layout_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_horizontal"
android:layout_marginTop="5dip"
android:weightSum="1">
<AutoCompleteTextView
android:layout_width="0dip"
android:layout_height="wrap_content"
android:text="testapi@canvasflip.com"
android:layout_weight="0.9"
android:inputType="textEmailAddress"
android:id="@+id/get_email" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_horizontal"
android:layout_marginTop="5dip"
android:weightSum="1">
<EditText
android:layout_width="0dip"
android:layout_height="wrap_content"
android:text="canvas123"
android:layout_weight="0.9"
android:inputType="textPassword"
android:id="@+id/get_password"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_horizontal"
android:layout_marginTop="15dip"
android:weightSum="1">
<Button
android:layout_width="0dip"
android:text="@string/login_register"
android:layout_height="wrap_content"
android:layout_weight="0.4"
android:typeface="monospace"
android:id="@+id/login_register"/>
</LinearLayout>
</LinearLayout>
<View
android:layout_width="fill_parent"
android:layout_height="1dip"
android:background="@color/DarkGrey"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dip"
android:orientation="vertical"
android:layout_weight="1">
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
class="com.example.amangrover.myapp.PublicProjectsFragment"
android:id="@+id/publicProjectFragment"/>
</LinearLayout>
</LinearLayout>
drawer_layout.xml
<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>
我一直坚持这个问题2天，试图找出自己，搜索谷歌，但仍然没有运气。导航抽屉不会通过单击汉堡包图标或从左侧滑动打开。任何帮助都非常感谢。
答案 0 :(得分：0)
要使用NavigationDrawer，您可以在需要/想要使用的任何地方使用DrawerLayout。
如果要在主活动中使用它，则必须构建如下布局：
<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">
<!-- Here put your acrivity layout,
for example the layout that you build in the main_activity.xml-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dip"
android:orientation="vertical"
android:layout_marginTop="10dip"
android:layout_weight="1">
<!-- other objects -->
</LinearLayout>
<!-- Here put the navigation drawer layout -->
<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>
建议：在DrawerActicity，而不是onCreate()，我通常使用onStart()，例如如下：
@Override
protected void onStart(){
super.onStart();
//Here you call the initial methods
mDrawerList = (ListView)findViewById(R.id.left_drawer);
mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
mActivityTitle = getTitle().toString();
addDrawerItems();
setupDrawer();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
在展开DrawerActivity的活动中，您使用onCreate()，设置htbe布局等。
文档参考：https://developer.android.com/training/implementing-navigation/nav-drawer.html
希望它清楚有用！