嗨，大家，这是我的代码。该菜单在我的手机上完美运行（Android 2.3）。但在我的平板电脑（Android 4.0）上，它不会显示图标。菜单工作正常。有人能帮助我吗？为什么会这样？我在Theme_Black_NoTitleBar中使用AndroidManifest.xml。
public final class IntentsDemoActivity extends Activity implements
OnItemClickListener {
public static final int ABOUT = 0;
public static final int INFO = 1;
public static final int WEBSITE = 2;
// This is the value of Intent.EXTRA_LOCAL_ONLY for API level 11 and above.
private static final String EXTRA_LOCAL_ONLY = "android.intent.extra.LOCAL_ONLY";
private static final String VIDEO_ID = "-Uwjt32NvVA";
private static final String PLAYLIST_ID = "PLF3DFB800F05F551A";
private static final String USER_ID = "Google";
private static final int SELECT_VIDEO_REQUEST = 1000;
private List<DemoListViewItem> intentItems;
public boolean onCreateOptionsMenu(android.view.Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, ABOUT, 0, "About").setIcon(R.drawable.about);
menu.add(0, INFO, 0, "Info").setIcon(R.drawable.info);
menu.add(0, WEBSITE, 0, "Website").setIcon(R.drawable.website);
return true;
}
public boolean onMenuItemSelected(int featureId, MenuItem item) {
switch (item.getItemId()) {
case ABOUT:
Toast.makeText(IntentsDemoActivity.this, "About", Toast.LENGTH_SHORT).show();
Uri uri = Uri.parse("https://www.google.com/about);
Intent it = new Intent(Intent.ACTION_VIEW,uri);
startActivity(it);
return true;
case PAGE:
Toast.makeText(IntentsDemoActivity.this, "Info", Toast.LENGTH_SHORT).show();
Uri uri = Uri.parse("https://www.google.com/info");
Intent it = new Intent(Intent.ACTION_VIEW,uri);
startActivity(it);
return true;
case WEBSITE:
Toast.makeText(IntentsDemoActivity.this, "Webiste", Toast.LENGTH_SHORT).show();
Uri uri1 = Uri.parse("http://www.google.com/");
Intent it1 = new Intent(Intent.ACTION_VIEW,uri1);
startActivity(it1);
return true;
}
return false;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.intents_demo);
intentItems = new ArrayList<DemoListViewItem>();
intentItems.add(new IntentItem("X", IntentType.X));
intentItems.add(new IntentItem("Play Video", IntentType.PLAY_VIDEO));
intentItems.add(new IntentItem("Open Playlist",
IntentType.OPEN_PLAYLIST));
intentItems.add(new IntentItem("Play Playlist",
IntentType.PLAY_PLAYLIST));
intentItems.add(new IntentItem("Open User", IntentType.OPEN_USER));
intentItems.add(new IntentItem("Open Search Results",
IntentType.OPEN_SEARCH));
intentItems
.add(new IntentItem("Upload Video", IntentType.UPLOAD_VIDEO));
ListView listView = (ListView) findViewById(R.id.intent_list);
DemoArrayAdapter adapter = new DemoArrayAdapter(this,
R.layout.list_item, intentItems);
listView.setAdapter(adapter);
listView.setOnItemClickListener(this);
TextView youTubeVersionText = (TextView) findViewById(R.id.youtube_version_text);
String version = YouTubeIntents.getInstalledYouTubeVersionName(this);
if (version != null) {
String text = String.format(
getString(R.string.youtube_currently_installed), version);
youTubeVersionText.setText(text);
} else {
youTubeVersionText
.setText(getString(R.string.youtube_not_installed));
}
}
public boolean isIntentTypeEnabled(IntentType type) {
switch (type) {
case PLAY_VIDEO:
return YouTubeIntents.canResolvePlayVideoIntent(this);
case OPEN_PLAYLIST:
return YouTubeIntents.canResolveOpenPlaylistIntent(this);
case PLAY_PLAYLIST:
return YouTubeIntents.canResolvePlayPlaylistIntent(this);
case OPEN_SEARCH:
return YouTubeIntents.canResolveSearchIntent(this);
case OPEN_USER:
return YouTubeIntents.canResolveUserIntent(this);
case UPLOAD_VIDEO:
return YouTubeIntents.canResolveUploadIntent(this);
}
return false;
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
IntentItem clickedIntentItem = (IntentItem) intentItems.get(position);
Intent intent;
switch (clickedIntentItem.type) {
case X:
// This will load a picker view in the users' gallery.
// The upload activity is started in the function onActivityResult.
intent = new Intent(Intent.ACTION_PICK, null).setType("video/*");
intent.putExtra(EXTRA_LOCAL_ONLY, true);
startActivityForResult(intent, SELECT_VIDEO_REQUEST);
break;
case PLAY_VIDEO:
intent = YouTubeIntents.createPlayVideoIntentWithOptions(this,
VIDEO_ID, true, false);
startActivity(intent);
break;
case OPEN_PLAYLIST:
intent = YouTubeIntents.createOpenPlaylistIntent(this, PLAYLIST_ID);
startActivity(intent);
break;
case PLAY_PLAYLIST:
intent = YouTubeIntents.createPlayPlaylistIntent(this, PLAYLIST_ID);
startActivity(intent);
break;
case OPEN_SEARCH:
intent = YouTubeIntents.createSearchIntent(this, USER_ID);
startActivity(intent);
break;
case OPEN_USER:
intent = YouTubeIntents.createUserIntent(this, USER_ID);
startActivity(intent);
break;
case UPLOAD_VIDEO:
// This will load a picker view in the users' gallery.
// The upload activity is started in the function onActivityResult.
intent = new Intent(Intent.ACTION_PICK, null).setType("video/*");
intent.putExtra(EXTRA_LOCAL_ONLY, true);
startActivityForResult(intent, SELECT_VIDEO_REQUEST);
break;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent returnedIntent) {
if (resultCode == RESULT_OK) {
switch (requestCode) {
case SELECT_VIDEO_REQUEST:
Intent intent = YouTubeIntents.createUploadIntent(this,
returnedIntent.getData());
startActivity(intent);
break;
}
}
super.onActivityResult(requestCode, resultCode, returnedIntent);
}
private enum IntentType {
X, PLAY_VIDEO, OPEN_PLAYLIST, PLAY_PLAYLIST, OPEN_USER, OPEN_SEARCH, UPLOAD_VIDEO;
}
private final class IntentItem implements DemoListViewItem {
public final String title;
public final IntentType type;
public IntentItem(String title, IntentType type) {
this.title = title;
this.type = type;
}
@Override
public String getTitle() {
return title;
}
@Override
public boolean isEnabled() {
return isIntentTypeEnabled(type);
}
@Override
public String getDisabledText() {
return getString(R.string.intent_disabled);
}
}
}
答案 0 :(得分：0)
确保在所有Drawable文件夹中粘贴了相同的图标，例如ldpi，mdpi，hdpi，尤其是平板电脑的xhdpi。
如果您在相应的文件夹中包含所有版本的图标，请发布menu.xml文件。
答案 1 :(得分：0)
但在我的平板电脑（Android 4.0）上，它不会显示图标。
如果图标位于操作栏的溢出菜单中，则不应显示该图标。溢出菜单是纯文本的。
答案 2 :(得分：0)
Drawble-ldpi，mdpi，hdpi，xhdpi文件夹必须保存自己的文件，因此请将具有相同名称的图标放在不同的文件夹中。我认为你的代码没有错，只有跳蚤错误。如果要创建不同的视觉效果，您的布局文件也必须位于具有相同名称的不同可绘制文件夹中。