如何在方向改变时将网格布局元素重新放置在片段中? [英] How to re-position the grid layout elements in fragments on orientation change?
本文介绍了如何在方向改变时将网格布局元素重新放置在片段中?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在进行一个底部的选项卡式活动，其中包含三个片段:首页"，仪表板"和通知".在第一个片段中，我有4个布局，每个布局中都有一个按钮.这四个布局在网格视图中对齐，而网格视图在纵向时的位置为column:rows(1:1 1:2 2:1 2:2).
I am having a bottom tabbed activity with three fragments Home, Dashboard and Notifications. In the first fragment, I am having 4 layouts with a button in each layout. These 4 layouts are aligned ina grid view having positions as column:rows (1:1 1:2 2:1 2:2) while in portrait orientation.
但是在风景模式下如何根据风景期间可用的水平区域将这些布局自动排列为(1:1 1:2 1:3 1:4)?
But how to auto-arrange these layouts when in landscape mode i.e. either as (1:1 1:2 1:3 1:4) based on the horizontal area available during landscape?
Xml文件
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:grid2="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center">
<ScrollView
android:id="@+id/scroll"
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.gridlayout.widget.GridLayout
android:id="@+id/container2"
android:layout_width="match_parent"
android:background="#00555555"
android:layout_height="wrap_content"
android:paddingTop="?attr/actionBarSize"
grid2:alignmentMode="alignBounds"
grid2:columnCount="2"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
grid2:rowOrderPreserved="false">
<LinearLayout
android:id="@+id/layout1"
android:layout_width="180dp"
android:layout_height="170dp"
android:background="@drawable/circle_shape"
android:gravity="center"
android:orientation="vertical"
android:text="TextView"
grid2:layout_column="0"
grid2:layout_gravity="center"
grid2:layout_row="0">
<Button
android:id="@+id/but1"
android:layout_width="55dp"
android:layout_height="56dp"
android:layout_gravity="center"
android:background="@drawable/button1"
android:layout_marginTop="20dp"
grid2:layout_gravity="left" />
<TextView
android:id="@+id/tv1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="8dp"
android:text="@string/control"
android:textSize="22sp"
android:textStyle="italic" />
<TextView
android:id="@+id/tv2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textColor="#25F325"
android:text="@string/no_status"
android:textSize="14sp" />
</LinearLayout>
<LinearLayout
android:id="@+id/layout2"
android:layout_width="180dp"
android:layout_height="170dp"
android:layout_marginEnd="20dp"
android:background="@drawable/circle_shape"
android:gravity="center"
android:orientation="vertical"
grid2:layout_column="1"
grid2:layout_gravity="center_horizontal"
grid2:layout_row="0">
<Button
android:id="@+id/but2"
android:layout_width="55dp"
android:layout_height="56dp"
android:layout_marginTop="10dp"
android:layout_gravity="center"
android:background="@drawable/button2" />
<TextView
android:id="@+id/tv4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:textStyle="italic"
android:textSize="21sp" />
<TextView
android:id="@+id/tv5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="10dp"
android:text="@string/no_data"
android:textColor="#25F325"
android:textSize="14sp" />
</LinearLayout>
<LinearLayout
android:id="@+id/layout3"
android:layout_width="180dp"
android:layout_height="170dp"
android:layout_marginStart="20dp"
android:layout_marginEnd="10dp"
android:background="@drawable/circle_shape"
android:gravity="center"
android:orientation="vertical"
grid2:layout_column="0"
grid2:layout_gravity="center"
grid2:layout_row="1">
<Button
android:id="@+id/but3"
android:layout_marginTop="0dp"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="center"
android:background="@drawable/img1" />
<TextView
android:id="@+id/tv6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:text="Fire"
android:textSize="21sp"
android:textStyle="italic" />
<TextView
android:id="@+id/tv7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="@string/no_data"
android:textColor="#25F325"
android:textSize="14sp" />
</LinearLayout>
<LinearLayout
android:id="@+id/layout4"
android:layout_width="180dp"
android:layout_height="170dp"
android:layout_marginTop="10dp"
android:layout_marginEnd="20dp"
android:background="@drawable/circle_shape"
android:gravity="center"
android:orientation="vertical"
android:text="TextView"
grid2:layout_column="1"
grid2:layout_gravity="center"
grid2:layout_row="1">
<Button
android:id="@+id/but4"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="center"
android:background="@drawable/gas1" />
<TextView
android:id="@+id/tv8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:text="Gas"
android:textSize="21sp"
android:textStyle="italic" />
<TextView
android:id="@+id/tv9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textColor="#25F325"
android:text="@string/no_data
android:textSize="14sp" />
</LinearLayout>
</androidx.gridlayout.widget.GridLayout>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>
家庭片段类
package com.example.qnorb.ui.home;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProviders;
import com.example.qnorb.R;
public class HomeFragment extends Fragment implements View.OnClickListener{
private HomeViewModel homeViewModel;
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
homeViewModel = ViewModelProviders.of(this).get(HomeViewModel.class);
View root = inflater.inflate(R.layout.fragment_home, container, false);
// textView = root.findViewById(R.id.lights);
homeViewModel.getText().observe(this, new Observer<String>() {
@Override
public void onChanged(@Nullable String s) {
}
});
return root;
}
@Override
public void onClick(View view) {
}
}
主视图模型类
package com.example.qnorb.ui.home;
import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.ViewModel;
public class HomeViewModel extends ViewModel {
private MutableLiveData<String> mText;
public HomeViewModel() {
mText = new MutableLiveData<>();
}
public LiveData<String> getText() {
return mText;
}
}
推荐答案
在轮换配置更改后，我建议使用具有不同 spanCount 的 RecyclerView 模式.
I would suggest use RecyclerView pattern with different spanCount after rotation configuration changes.
您还可以通过屏幕宽度或其他任何方式来计算跨度计数.
Also you can calculate span count by screen width or whatever.
因此，基本上在 onCreate()中，将新的 GridLayoutManager(context，GRID_SPAN_COUNT_BY_ROTATION)设置为 RecyclerView
So basically in onCreate(), set new GridLayoutManager(context, GRID_SPAN_COUNT_BY_ROTATION) in toRecyclerView
它应该在您的片段中看起来像这样:
it should look like this in your fragment:
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
homeViewModel = ViewModelProviders.of(this).get(HomeViewModel.class);
View root = inflater.inflate(R.layout.fragment_home, container, false);
RecyclerView recyclerView = root.findViewById(R.id.your_recyclerview);
// set span count by orientation
int orientation = getResources().getConfiguration().orientation;
int spanCount;
if (orientation == Configuration.ORIENTATION_PORTRAIT) {
// code for portrait mode
spanCount = 4;
} else {
// code for landscape mode
spanCount = 9;
}
// set GridLayoutManager with custom span count
recyclerView.setLayoutManager(new GridLayoutManager(context, spanCount));
homeViewModel.getText().observe(this, new Observer<String>() {
@Override
public void onChanged(@Nullable String s) {
}
});
return root;
}
如果它不起作用，请不要忘记更改清单配置规则，如另一个答案中所述.
if it is not working then do not forget to change manifest config rules like mentioned in another answer.
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