[英]Display dialog - IllegalStateException: You need to use a Theme.AppCompat theme
我想显示一个 AlertDialog,当对话框应该出现时,我收到下一条消息:
IllegalStateException:您需要在此活动中使用 Theme.AppCompat 主题(或后代)。
这是我用来显示对话框的代码:
new AlertDialog.Builder(getBaseContext())
.setTitle("Not set yet :(")
.setMessage("You haven't set the directories to search in... Do you want to set it now?")
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent i = new Intent(MainActivity.this, SettingsActivity.class);
startActivity(i);
}
})
.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
})
.show();
这是 MainActivity 的标题:
public class MainActivity extends AppCompatActivity
这是我的styles.xml
<!-- 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>
我试图通过互联网寻找答案但找不到答案,我该如何解决这个问题? 我需要一个ActionBar,我需要改变继承吗? 或者我应该在 AndroidManifest.xml 或 style.xml 中更改某些内容?
谢谢!
在你的style.xml 中添加这个
<style name="AlertDialogCustom" parent="Theme.AppCompat.Light.Dialog.Alert">
<item name="colorAccent">@color/colorAccent</item>
<item name="android:textColorPrimary">@color/colorPrimary</item>
<item name="android:background">#FFFFFF</item>
</style>
并将其用于MainActivity.java 中的show Dialog(退出对话框示例):
AlertDialog.Builder builder = new AlertDialog.Builder(YourMainActivity.this, R.style.AlertDialogCustom);
builder.setTitle(getResources().getString(R.string.title));
builder.setMessage(getResources().getString(R.string.exit_dialog));
builder.setPositiveButton(getResources().getString(R.string.ok_dialog), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
YourMainActivity.this.finish();
}
});
builder.setNegativeButton(getResources().getString(R.string.cancel_dialog), null);
builder.show();
比在string.xml 中:
<string name="cancel_dialog">CANCEL</string>
<string name="ok_dialog">OK</string>
<string name="exit_dialog">Are you sure you want to quit?</string>
<string name="title">Your App Title</string>
在colors.xml (可选)中:
<item name="colorAccent" type="color">#FFFF8800</item>
<item name="colorPrimary" type="color">#FFCC0000</item>
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