我是Android的新手,我完全遵循Android官方教程,直到这一点:https://developer.android.com/training/basics/actionbar/styling.html我正在尝试更改背景颜色并使用操作栏查看操作栏上的默认Android图标支持库(使用Theme.AppCompact)。但是,当我尝试设置像#AA0000这样的十六进制颜色时,Android Studio给出了错误“无法解析符号”(在themes.xml中的支持库行),如果没有错误我也看不到Android操作栏左侧的图标。
期望如下:
真实结果(当我删除十六进制并设置背景图像以避免错误时)如:
左侧的图标缺失(右侧的菜单底部,但我不知道问题是否与屏幕的英寸尺寸有关。)
但是,在这种情况下,我只能设置背景图像,而不是十六进制颜色,我无法查看图标,这些是我的文件(在themes.xml上使用十六进制颜色):
这是 AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mycompany.myfirstapp" >
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MyActivity"
android:label="@string/app_name"
android:theme="@style/CustomActionBarTheme" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".DisplayMessageActivity"
android:label="@string/title_activity_display_message"
android:parentActivityName=".MyActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.mycompany.myfirstapp.MyActivity" />
</activity>
</application>
<uses-sdk android:minSdkVersion="14" />
</manifest>
的themes.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- the theme applied to the application or activity -->
<style name="CustomActionBarTheme"
parent="@style/Theme.AppCompat.Light.DarkActionBar">
<item name="android:actionBarStyle">@style/MyActionBar</item>
<!-- Support library compatibility -->
<item name="actionBarStyle">@style/MyActionBar</item>
</style>
<!-- ActionBar styles -->
<style name="MyActionBar"
parent="@style/Widget.AppCompat.Light.ActionBar.Solid.Inverse">
<item name="android:background">#AA0000</item>
<!-- Support library compatibility -->
<item name="background">#AA0000</item>
</style>
</resources>
MyActivity.java
public class MyActivity extends AppCompatActivity {
public final static String EXTRA_MESSAGE = "com.mycompany.myfirstapp.MESSAGE";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_activity_actions, menu);
return super.onCreateOptionsMenu(menu);
}
@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();
// Handle presses on the action bar items
switch (id) {
case R.id.action_search:
//openSearch();
Log.i("MyActivity", "SEARCH PRESSED");
return true;
case R.id.action_settings:
//openSettings();
Log.i("MyActivity", "SETTINGS PRESSED");
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/** Called when the user clicks the Send button */
public void sendMessage(View view) {
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
}
activity_my.xml
<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"
android:orientation="horizontal" >
<EditText android:id="@+id/edit_message"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="@string/edit_message" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_send"
android:onClick="sendMessage"/>
</LinearLayout>
** main_activity_actions.xml
<?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">
<!-- Search, should appear as action button -->
<item android:id="@+id/action_search"
android:icon="@drawable/ic_action_search"
android:title="@string/action_search"
app:showAsAction="ifRoom" />
<!-- Settings, should always be in the overflow -->
<item android:id="@+id/action_settings"
android:title="@string/action_settings"
app:showAsAction="never" />
</menu>
styles.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
</style>
</resources>
我该如何解决这个问题?
答案 0 :(得分:2)
<style name="MyActionBar"
parent="@style/Widget.AppCompat.Light.ActionBar.Solid.Inverse">
<item name="android:background">#AA0000</item>
<!-- Support library compatibility -->
<item name="background">#AA0000</item>
</style>
</resources>
这不起作用,因为如果你想使用它,你需要定义颜色并命名它。
在res / values文件夹中,应该有一个名为colors.xml的文件。如果没有,请在res / values文件夹中创建colors.xml,然后将颜色定义添加到colors.xml:
<item name="my_color" type="color">#AA0000</item>
然后通过其资源名称引用它来使用颜色:
<style name="MyActionBar"
parent="@style/Widget.AppCompat.Light.ActionBar.Solid.Inverse">
<item name="android:background">@color/my_color</item>
<!-- Support library compatibility -->
<item name="background">@color/my_color</item>
</style>
</resources>
有关颜色的更多信息:https://developer.android.com/samples/BasicMediaRouter/res/values/colors.html
此外,使用AppCompatActivity时,您不会在操作栏中看到应用程序图标。这只是该类的默认行为。但如果你想看到它:show icon in actionbar/toolbar with AppCompat-v7 21
答案 1 :(得分:0)
这项工作对我来说:
<resources xmlns:tools="http://schemas.android.com/tools">
<style name="BuffTheme" parent="@style/Theme.AppCompat.Light">
<item name="android:actionBarStyle" tools:ignore="NewApi">@style/MyActionBar</item>
<item name="actionBarStyle">@style/MyActionBar</item>
</style>
<style name="MyActionBar" parent="@style/Widget.AppCompat.Light.ActionBar.Solid.Inverse">
<item name="android:background" tools:ignore="NewApi">@color/dark_action_bar</item>
<item name="background">@color/dark_action_bar</item>
<item name="titleTextStyle">@style/TitleTextStyle</item>
<item name="subtitleTextStyle">@style/SubTitleTextStyle</item>
</style>
<style name="TitleTextStyle" parent="@style/TextAppearance.AppCompat.Widget.ActionBar.Title">
<item name="android:textColor">@color/white</item>
</style>
<style name="SubTitleTextStyle" parent="@style/TextAppearance.AppCompat.Widget.ActionBar.Title">
<item name="android:textColor">@color/white</item>
<item name="android:textSize">11sp</item>
</style>
</resources>
注意tools:ignore="NewApi"
属性