我想显示一个AlertDialog,当对话框出现时,我收到下一条消息:
IllegalStateException:您需要使用Theme.AppCompat主题(或 这个活动的后代。
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无法找到答案, 我该如何解决这个问题? 我需要一个ActionBar,我需要更改继承吗?或者我应该在AndroidManifest.xml或styles.xml中更改某些内容吗?
谢谢!
答案 0 :(得分:1)
在 style.xml
中添加此内容<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 string.xml :
<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):
<item name="colorAccent" type="color">#FFFF8800</item>
<item name="colorPrimary" type="color">#FFCC0000</item>