我正在努力在触摸(选择)偏好时添加涟漪效果。我通过扩展ListPreference
来定制我的偏好。我试图使用RippleDrawable
以编程方式设置涟漪效果,但我看不到动画。
这是我的自定义偏好类
public class CustomListPreference extends ListPreference {
public CustomListPreference(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomListPreference(Context context) {
super(context);
}
@Override
protected void onBindView(View view) {
super.onBindView(view);
setCustomStyle(view);
}
private void setCustomStyle(View view) {
TextView titleView = (TextView) view.findViewById(android.R.id.title);
titleView.setTypeface(InitActivity.TYPEFACE_REGULAR);
TextView summary = (TextView) view.findViewById(android.R.id.summary);
summary.setTypeface(InitActivity.TYPEFACE_REGULAR);
//Setting the drawable here, but it doesn't work.
RippleDrawable drawable = (RippleDrawable) getContext().getResources().getDrawable(R.drawable.my_ripple_background);
view.setBackGround(drawable);
}
}
我的偏好布局
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<!-- opens a subscreen of settings -->
<com.abc.app.CustomListPreference
android:defaultValue="1"
android:entries="@array/sampleEntries"
android:entryValues="@array/SampleEntryValues"
android:key="some_preference"
android:title="@string/some_preferences" />
<com.abc.app.CustomCheckboxPreference
android... />
</PreferenceScreen>
我的涟漪xml
<ripple
xmlns:android="http://schemas.android.com/apk/res/android"
android:color="@color/light_black_overlay"> <!--#22000000-->
<item>
<shape
android:shape="rectangle">
<solid android:color="@android:color/background_light" />
</shape>
</item>
</ripple>
我是否为正确的视图设置了动画?任何想法都表示赞赏。感谢。
答案 0 :(得分:6)
这是向扩展ListPreference
的类添加自定义涟漪效果的最小完整示例。我刚用API 21(5.0)制作并测试了它。
设置活动(启动活动)
public class SettingsActivity extends PreferenceActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.pref_general);
}
}
<强> pref_general.xml 强>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<CheckBoxPreference
android:defaultValue="true"
android:key="example_checkbox"
android:summary="a checkbox"
android:title="Checkbox test" />
<!-- replace with com.abc.app.CustomListPreference in your case-->
<com.timcastelijns.rippletest.CustomListPreference
android:defaultValue="1"
android:entries="@array/sampleEntries"
android:entryValues="@array/SampleEntryValues"
android:key="some_preference"
android:title="test" />
</PreferenceScreen>
<强> arrays.xml 强>
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="sampleEntries">
<item>1</item>
<item>2</item>
<item>3</item>
</string-array>
<string-array name="SampleEntryValues">
<item>4</item>
<item>5</item>
<item>6</item>
</string-array>
</resources>
<强> CustomListPreference 强>
public class CustomListPreference extends ListPreference {
private Context ctx;
public CustomListPreference(Context context, AttributeSet attrs) {
super(context, attrs);
ctx = context;
}
public CustomListPreference(Context context) {
super(context);
ctx = context;
}
@Override
protected void onBindView(View view) {
super.onBindView(view);
setCustomStyle(view);
}
private void setCustomStyle(View view) {
RippleDrawable drawable = (RippleDrawable) ctx.getDrawable(R.drawable.my_ripple_background);
view.setBackground(drawable);
}
}
<强> my_ripple_background.xml 强>
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="@android:color/holo_blue_light">
<item android:id="@android:id/mask">
<color android:color="@android:color/white" />
</item>
</ripple>
按下时,它会显示浅蓝色波纹效果,如xml:
中所指定我根据您的代码和android SDK示例中的示例SettingsActivity中的代码构建了此示例。
编辑:
经过一段时间的聊天和尝试各种各样的事情,我们得出结论,问题是由OP的手机(三星S5)或它的设置引起的。当OP尝试模拟器中的代码时,一切正常。
供参考 - 这是它在OPs手机中的样子: