Question

我的代码出了什么问题，它无法显示我的任何Android ActionBar图标。以下是我的代码：纠正错过的地方。

我的style.xml：

<resources>

<!-- Base application theme. -->
<style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
    <!-- Customize your theme here. -->



</style>

我的themes.xml：我使用了自定义主题。我想从这里我需要更改为显示图标

 <?xml version="1.0" encoding="utf-8"?>

<!-- the theme applied to the application or activity -->
<style name="CustomActionBarTheme"
    parent="@android:style/Theme.Holo.Light.DarkActionBar">
    <item name="android:actionBarStyle">@style/MyActionBar</item>

    <item name="android:actionMenuTextColor">@style/MyActionBarTitleText</item>

    <item name="android:actionBarTabTextStyle">@style/MyActionBarTabText</item>

</style>

<!-- ActionBar styles -->
<style name="MyActionBar"
    parent="@android:style/Widget.Holo.Light.ActionBar.Solid.Inverse">
    <item name="android:background">@color/PrimaryColor</item>
</style>


<!-- ActionBar title text -->
<style name="MyActionBarTitleText"
    parent="@android:style/TextAppearance.Holo.Widget.ActionBar.Title">
    <item name="android:background">@color/ActionBarTitleText</item>
</style>



<!-- ActionBar tabs text styles -->
<style name="MyActionBarTabText"
    parent="@android:style/Widget.Holo.ActionBar.TabText">
    <item name="android:textColor">@color/ActionBarTitleText</item>
</style>

MainActivity：

//ActionBar creating/adding icon in Menu
@Override
public boolean onCreateOptionsMenu(Menu menu){
    MenuInflater menuInflater = getMenuInflater();
    menuInflater.inflate(R.menu.main_activity_menu, menu);
    return super.onCreateOptionsMenu(menu);
}

//ActionBar Menu icon listerner like clicking options
@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch(item.getItemId()){
        case R.id.info:
            Toast.makeText(getApplicationContext(),
                    "Info Selected",Toast.LENGTH_SHORT).show();
        case R.id.st:
            Toast.makeText(getApplicationContext(),
                    "Setting Selected",Toast.LENGTH_SHORT).show();
        default:
            return super.onOptionsItemSelected(item);
    }
}

main_activity_menu.xml：我试过“总是”＆amp; “IfRoom”但它不起作用。

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">

<item
    android:id = "@+id/info"
    android:title="info"
    android:icon="@drawable/ic_info_outline_white_24dp"
    app:showAsAction="always|withText">

</item>

<item
    android:id = "@+id/st"
    android:title="settings"
    android:icon="@drawable/ic_settings_white_24dp"
    app:showAsAction="always">

</item>

Answer 1

您应该使用android:showAsAction = "ifRoom"

Answer 2

如果您使用AppCompatActivity，请尝试this

将此代码添加到您的Activity类：

@Override
protected boolean onPrepareOptionsPanel(View view, Menu menu) {
    if (menu != null) {
        if (menu.getClass().getSimpleName().equals("MenuBuilder")) {
            try {
                Method m = menu.getClass().getDeclaredMethod(
                        "setOptionalIconsVisible", Boolean.TYPE);
                m.setAccessible(true);
                m.invoke(menu, true);
            } catch (Exception e) {
                Log.e(getClass().getSimpleName(), "onMenuOpened...unable to set icons for overflow menu", e);
            }
        }
    }
return super.onPrepareOptionsPanel(view, menu);
}

Answer 3

你最好在onCreateOptionsMenu中返回true 。

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater menuInflater = getMenuInflater();
    menuInflater.inflate(R.menu.main_activity_menu, menu);
    return true;
}

除此之外，您的代码中似乎还有其他一些问题。例如，你应该把断裂放在每个案例句子的尾部。

case R.id.info:
    Toast.makeText(getApplicationContext(),
            "Info Selected",Toast.LENGTH_SHORT).show();
    break;
case R.id.st:
    Toast.makeText(getApplicationContext(),
            "Setting Selected",Toast.LENGTH_SHORT).show();
    break;

Answer 4

尝试以下，

ActionBar actionBar = getSupportActionBar();
actionBar.setLogo(R.drawable.ic_launcher);
actionBar.setDisplayUseLogoEnabled(true);
actionBar.setDisplayShowHomeEnabled(true);

Answer 5

您只需将app:showAsAction更改为android:showAsAction，因为您没有使用兼容性主题

如何在ActionBar上看到图标？

5 个答案: