我的 MainActivity 类:
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
....
...
}
样式.xml:
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar"/>
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light"/>
</resources>
当我运行该应用程序时,它运行良好,但是当我尝试AlertDialog.Builder
从我的适配器类创建/显示时,它会给出错误
`You need to use a Theme.AppCompat theme (or descendant) with this activity.at android.support.v7.app.AppCompatDelegateImplBase.onCreate(AppCompatDelegateImplBase.java:124)`
清单文件:
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
警报对话框代码:
public class mainviewAdapter extends ArrayAdapter<MainCategory>
{
AlertDialog.Builder builderSingle;
public mainviewAdapter (Context context, ArrayList<MainCategory> values) {
super(context, R.layout.home_rt, values);
this.context = context;
this.values = values;
builderSingle = new AlertDialog.Builder(context);
builderSingle.setIcon(R.mipmap.ic_launcher);
builderSingle.setTitle("Select Your Category");
}
on button click:
builderSingle.setNegativeButton("cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builderSingle.setAdapter(arrayAdapter,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
builderSingle.show();
我该如何解决这个错误Alertdialog
?