自定义对话框的主题

一、1.manifest.xml中
<activity android:name=".app.CustomDialogActivity"
                android:label="@string/activity_custom_dialog"
                android:theme="@style/Theme.CustomDialog">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.SAMPLE_CODE" />
            </intent-filter>
        </activity>
   2.xml中
<TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:gravity="center_vertical|center_horizontal"
    android:text="@string/custom_dialog_activity_text"/>
二、1.manifest.xml中
<activity android:name=".app.DialogActivity"
                android:label="@string/activity_dialog"
                android:theme="@android:style/Theme.Dialog">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.SAMPLE_CODE" />
            </intent-filter>
        </activity>
2.dialog_activity.xml
<TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:gravity="center_vertical|center_horizontal"
    android:text="@string/dialog_activity_text"/>
3.代码
  requestWindowFeature(Window.FEATURE_LEFT_ICON);
       
        // See assets/res/any/layout/dialog_activity.xml for this
        // view layout definition, which is being set here as
        // the content of our screen.
        setContentView(R.layout.dialog_activity);
       
        getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,
                android.R.drawable.ic_dialog_alert);