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第一步,在styles.xml文件中添加如下样式
<style name="myTranslucent" parent="AppTheme">
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:colorBackgroundCacheHint">@null</item>
<item name="android:windowIsTranslucent">false</item>
<item name="android:windowAnimationStyle">@android:style/Animation</item>
</style>
关键是要添加这一条:
<item name="android:windowIsTranslucent">false</item>
第二步,在activity上应用此样式
<manifest>
...
<application>
....
<activity
android:name=".chatui.ui.activity.FullImageActivity"
android:configChanges="orientation|keyboardHidden|navigation|screenSize"
android:screenOrientation="portrait"
android:windowSoftInputMode="stateHidden|adjustPan"
android:theme="@style/myTranslucent" />
</application>
</manifest>
关键是这一条:
android:theme="@style/myTranslucent"
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