Android studio使用android:style/Theme.Dialog報錯:You need to use a Theme.AppCompat theme (or descendant)

查找緣由是在activity java代碼部分繼承了compatactivity

public class DialogActivity extends AppCompatActivity

可是在AndroidManifest.xml裏面肯定義成Dialog,

<activity android:name=".DialogActivity"
    android:theme="@android:style/Theme.Dialog">
</activity>

解決方法是修改activity java代碼,繼承Activity便可:

public class DialogActivity extends Activity