我正在尝试手动处理复杂视图的旋转,包括恢复适当的位置和大小。目前,我正在尝试这样做onLayout
(更好的想法是很受欢迎的)。有时效果很好,但通常第一个旋转是放错位置或在没有孩子的情况下绘制视图。
private int oldOrientation = -1;
/**
* Override method to configure the dragged view and secondView layout properly.
*/
@Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
Log.e("mylayout", "onLayout " + df.format(new Date(Calendar.getInstance().getTimeInMillis())));
if (isInEditMode()) {
super.onLayout(changed, left, top, right, bottom);
} else {
dragView.setVisibility(INVISIBLE);
if (isDragViewAtTop() && (oldOrientation != getResources().getConfiguration().orientation || oldOrientation == -1)) {
dragView.layout(left, top, right, transformer.getOriginalHeight());
secondView.layout(left, transformer.getOriginalHeight(), right, bottom);
ViewHelper.setY(dragView, top);
ViewHelper.setY(secondView, transformer.getOriginalHeight());
ViewHelper.setX(dragView, left);
ViewHelper.setX(secondView, left);
oldOrientation = getResources().getConfiguration().orientation;
} else if (isClosedAtLeft() && (
oldOrientation != getResources().getConfiguration().orientation
|| oldOrientation == -1)) {
dragView.layout(left, top, right, transformer.getOriginalHeight());
secondView.layout(left, transformer.getOriginalHeight(), right, bottom);
ViewHelper.setY(dragView, top);
ViewHelper.setY(secondView, transformer.getOriginalHeight());
ViewHelper.setX(dragView, left);
ViewHelper.setX(secondView, left);
closeToLeft();
oldOrientation = getResources().getConfiguration().orientation;
} else if (isClosedAtRight() && (
oldOrientation != getResources().getConfiguration().orientation
|| oldOrientation == -1)) {
dragView.layout(left, top, right, transformer.getOriginalHeight());
secondView.layout(left, transformer.getOriginalHeight(), right, bottom);
ViewHelper.setY(dragView, top);
ViewHelper.setY(secondView, transformer.getOriginalHeight());
ViewHelper.setX(dragView, left);
ViewHelper.setX(secondView, left);
closeToRight();
oldOrientation = getResources().getConfiguration().orientation;
} else if ((oldOrientation != getResources().getConfiguration().orientation
|| oldOrientation == -1)) {
dragView.layout(left, top, right, transformer.getOriginalHeight());
secondView.layout(left, transformer.getOriginalHeight(), right, bottom);
ViewHelper.setY(dragView, top);
ViewHelper.setY(secondView, transformer.getOriginalHeight());
ViewHelper.setX(dragView, left);
ViewHelper.setX(secondView, left);
smoothSlideTo(SLIDE_BOTTOM);
oldOrientation = getResources().getConfiguration().orientation;
}
dragView.setVisibility(VISIBLE);
}
}
在这段代码中,我尝试在旋转后恢复初始的stte,当调用onLayout并将其移动到适当的位置时,视图是在旋转之前的(有4种状态,从屏幕左移,从屏幕右移,屏幕顶部或右下角)。
编辑:
<?xml version="1.0" encoding="utf-8"?>
<manifest
package="com.github.pedrovgs.sample"
xmlns:android="http://schemas.android.com/apk/res/android">
<uses-sdk android:minSdkVersion="8" />
<!-- Permissions -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<!-- Application configuration -->
<application
android:name=".DraggablePanelApplication"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme">
<!-- Maps API KEY -->
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyC1rMU-mkhoyTvBIdTnYU0dss0tU9vtK48" />
<!-- Main Activity -->
<activity
android:name=".activity.MainActivity"
android:configChanges="keyboardHidden|orientation|screenSize"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- Places sample -->
<activity
android:name=".activity.PlacesSampleActivity"
android:configChanges="keyboardHidden|orientation|screenSize"
android:label="@string/places_sample_activity_title" />
<!-- TV Shows sample -->
<activity
android:name=".activity.TvShowsActivity"
android:label="@string/tv_shows_sample_activity_title" />
<!-- Youtube Sample -->
<activity
android:name=".activity.YoutubeSampleActivity"
android:configChanges="keyboardHidden|orientation|screenSize"
android:label="@string/youtube_sample_activity_title" />
<!-- Video Sample -->
<activity
android:name=".activity.VideoSampleActivity"
android:configChanges="keyboardHidden|orientation|screenSize"
android:label="@string/video_sample_activity_title" />
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
</application>
</manifest>
样本活动xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:draggable_panel="http://schemas.android.com/apk/res-auto"
android:id="@+id/fl_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Movie Thumbnail -->
<ImageView
android:id="@+id/iv_thumbnail"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
style="@style/image_view"/>
<!-- DraggablePanel -->
<com.github.pedrovgs.DraggablePanel
android:id="@+id/draggable_panel"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
draggable_panel:x_scale_factor="@dimen/x_scale_factor"
draggable_panel:y_scale_factor="@dimen/y_scale_factor"
draggable_panel:top_fragment_height="@dimen/top_fragment_height"
draggable_panel:top_fragment_margin_right="@dimen/top_fragment_margin"
draggable_panel:top_fragment_margin_bottom="@dimen/top_fragment_margin"
draggable_panel:enable_horizontal_alpha_effect="false"/>
</FrameLayout>
您纷纷伸出ViewGroup
来代替View
,但还没有添加任何child
的DraggableView
在XML或代码。我在中看不到任何addChild
儿童相关的代码DraggableView
。您曾经使用过topFragment
,bottomFragment
等等。并且您曾经addFragmentToView()
在中进行过片段交易ViewGroup
。馊主意!
我知道这既困难又费时。但是您需要退后一步,考虑一下此视图的设计。我强烈建议您将这些topFragment
等作为孩子对待DraggableView
,而不要FragmentManager
在此视图中执行addTransaction
。
一旦开始将碎片作为孩子添加到您的碎片中ViewGroup
,许多复杂性就会消失。我说这是根据我过去的经验。onLayout()
用于安排Child Views
内部ViewGroup
。旋转设备后,onLayout()
将再次调用该设备,并根据需要排列子视图。这将非常简单。一旦开始这样的概念化,拖动操作将变得非常简单。
如果您认为在Framgents
中生小孩ViewGroup
是荒谬的,请查看此处的ViewPager
代码。这使用片段作为输入,但仍将它们视为布局的子代。
onLayout()
本身相关的所有内容。onSaveInstanceState()
。仅在其中保存text
或drawable
数据。onCofigurationChanged()
。您可能现在无法执行此操作,但是从长远来看,您可能想要重构并以这种方式执行。
记住onLayout()
:
当此视图应为其每个子级分配大小和位置时从布局调用。有子级的派生类应重写此方法,并在每个子级上调用布局。
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句