安卓：增加了选项菜单动态

Question

我只是想给其他活动添加到我的选项菜单 我有我的应用程序，它显示为

public class OptionsMenuTesterActivity extends Activity { 
     /** Called when the activity is first created. */ 
     @Override 
     public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.main); 
     } 
     @Override 
     public boolean onCreateOptionsMenu(Menu menu) { 
      super.onCreateOptionsMenu(menu); 

      // Create an Intent that describes the requirements to fulfill, to be included 
      // in our menu. The offering app must include a category value of Intent.CATEGORY_ALTERNATIVE. 
      Intent intent = new Intent(null,getIntent().getData()); 
      intent.addCategory(Intent.CATEGORY_ALTERNATIVE); 

      // Search for, and populate the menu with, acceptable offering applications. 
      menu.addIntentOptions(
        Menu.CATEGORY_ALTERNATIVE, // Menu group 
       0,  // Unique item ID (none) 
       0,  // Order for the items (none) 
       this.getComponentName(), // The current Activity name 
       null, // Specific items to place first (none) 
       intent, // Intent created above that describes our requirements 
       0,  // Additional flags to control items (none) 
       null); // Array of MenuItems that corrolate to specific items (none) 

      return true; 
     } 
    } 

现在我已经创造了另一个简单的应用程序有一个活动的菜单定义和它的androidmaifest看起来如下

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.idg.test.dynamicoptionsmenu" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk android:minSdkVersion="10" /> 

    <application 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" > 
     <activity 
      android:name=".DynamicOptionsMenuTesterActivity" 
      android:label="@string/app_name" > 
      <intent-filter label="test menu"> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
       <category android:name="android.intent.category.ALTERNATIVE" /> 

      </intent-filter> 
     </activity> 
    </application> 

</manifest> 

我有两个应用程序启动。但是，当我点击第一个应用程序的菜单，我什么都看不到 你能帮我告诉我在这里失踪吗？

Answer 1

public void openOptionsMenu() { 
    // TODO Auto-generated method stub 
    super.openOptionsMenu(); 
} 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    //call the base class to include system menus 
    super.onCreateOptionsMenu(menu); 

     int group1 = 1; 
     MenuItem bakchome = menu.add(group1,1,1,"title"); 
     bakchome.setIcon(R.drawable.ic_menu_add); 

    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
     switch(item.getItemId()) { 
     case 1: 

     Intent intent1 = new Intent(getApplicationContext(), yourintent.class); 
     intent1.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
      startActivity(intent1); 
      break; 

     } 

    return true; 
} 

Answer 2

问题是有点老，但我花了我一段时间才能完成它，所以也许它会为别人节省一些时间和沮丧。希望它有帮助...

这是我做了什么来创建我的动态菜单，提供所有可用的选项来共享图像。我已经构建了自己的topmenu，而不是使用ActionBar。我的菜单项目开始于在Activity的onCreate方法的ImageButton ...

ImageButton shareBtn = (ImageButton)findViewById(R.id.shareBtn); 
    shareBtn.setOnClickListener(new View.OnClickListener() { 

     // receive launchables (to build menu items) 
     List<ResolveInfo> launchables = getLaunchablesToShareWith(); 
     PackageManager pm=getPackageManager(); 

     @Override 
     public void onClick(View v) { 
      //Creating the instance of PopupMenu 
      PopupMenu popup = new PopupMenu(getApplicationContext(), v); 

      //enable icons using Reflection... 
      try { 
       Field[] fields = popup.getClass().getDeclaredFields(); 
       for (Field field : fields) { 
        if ("mPopup".equals(field.getName())) { 
         field.setAccessible(true); 
         Object menuPopupHelper = field.get(popup); 
         Class<?> classPopupHelper = Class.forName(menuPopupHelper 
           .getClass().getName()); 
         Method setForceIcons = classPopupHelper.getMethod(
           "setForceShowIcon", boolean.class); 
         setForceIcons.invoke(menuPopupHelper, true); 
         break; 
        } 
       } 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 


      //Inflating the Popup using xml file 
      popup.getMenuInflater().inflate(R.menu.popupmenu_your_activity, popup.getMenu()); 

      // add items 
      for (ListIterator<ResolveInfo> iterator = launchables.listIterator(); iterator.hasNext();) { 

       // extract data from launchables 
       ResolveInfo resolveInfo = iterator.next(); 
       String title = resolveInfo.activityInfo.applicationInfo.loadLabel(pm).toString(); 
       String packageName = resolveInfo.activityInfo.applicationInfo.packageName; 
       Drawable appIcon = null; 
       try { 
        appIcon = pm.getApplicationIcon(packageName); 
       } catch (PackageManager.NameNotFoundException e) { 
        e.printStackTrace(); 
        continue; 
       } 

       // create & add item 
       popup.getMenu().add(0, 0, 0, title) 
           .setIcon(appIcon) 
           .setIntent(getShareIntent().setPackage(packageName)) 
           .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 
            public boolean onMenuItemClick(MenuItem item) { 
             prepareImageToShare(true); 
             startActivity(item.getIntent()); 
             return true; 
            } 
           }); 
      } 

      popup.show(); 
     } 
    }); 

要创建launchables列表：

private List<ResolveInfo> getLaunchablesToShareWith() { 
    PackageManager pm = getPackageManager(); 

    Intent intent = new Intent(Intent.ACTION_SEND, null); 
    intent.setType("image/png"); 

    List<ResolveInfo> launchables=pm.queryIntentActivities(intent, 0); 
    Collections.sort(launchables, new ResolveInfo.DisplayNameComparator(pm)); 

    return launchables; 
} 

创建共享Intent：

private Intent getShareIntent() { 
    // File helper returns something like return Uri.parse("file:///storage/emulated/0/YourApp/output/image.png"); 
    Uri imageUri = FileHelper.getOutputPathAsUri(Files.SHARED_OUTPUT_FILE.getFilename(), Paths.OUTPUT_FOLDER_PATH.getPath(), true); 

    Intent shareIntent = new Intent(Intent.ACTION_SEND); 
    shareIntent.setData(imageUri); 
    shareIntent.setType("image/png"); 
    shareIntent.putExtra(Intent.EXTRA_STREAM, imageUri); 

    return shareIntent; 
} 

菜单布局文件（popupmenu_your_activity.xml）看起来像这样：

<menu xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
tools:context="your.package.YourActivity" > 

    <!-- popup menu with dynamic content --> 

</menu>