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androidStudio出現错误：This view is not constrained. 的解决方法

发布时间：2021-06-29 21:34:16编辑：雪饮阅读（）

 最近老出現一個錯誤，其大致如：

This view is not constrained. It only has designtime positions, so it will jump to (0,0) at runtime unless you add the constraints
這錯誤出現在androidStudio4.2.1上面，有時候不曉得怎麽的就又不見了。
大致意思說我的佈局，一般是綫性佈局沒有設置方向，就是綫性佈局中的那個垂直或者水平的屬性，就是orientation屬性，但是我檢查我的代碼是有設置的，對於每個綫性佈局。
那麽解決方法，其實挺簡單的

在這裏佈局的設計視圖中點擊下這個魔術棒一樣的圖標，這裏懸停會出現“infer constraints”，好像是老版本的androidStudio中就直接有這個“infer constraints”菜單，而不是這個類似魔術棒一樣的圖標。
這裏你要選擇根佈局constraintlayout去點擊這個魔術棒就可以了，如果是老版本就是選擇這個根佈局后右鍵菜單裏面的“infer constraints”項點擊下即可。
問題處理之後，我們看看代碼：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".videodelogo.VideoDeLogoActivity">
    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:onClick="selectVideo"
                android:text="選擇一個視頻" />
        </LinearLayout>
        <!--播放按鈕控制區域-->
        <LinearLayout
            android:id="@+id/video_control_buttons"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center"
            android:orientation="horizontal"
            android:visibility="gone">

            <Button
                android:id="@+id/bt_play"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:onClick="play"
                android:text="播放"
                android:visibility="gone" />

            <Button
                android:id="@+id/bt_pause"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:onClick="pause"
                android:text="暂停" />

            <Button
                android:id="@+id/bt_stop"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:onClick="stop"
                android:text="停止" />
        </LinearLayout>
        <!--輸出標題區域-->
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:visibility="gone">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="输出标题:"></TextView>

            <EditText
                android:id="@+id/cut_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text=""
                android:textAlignment="center" />
        </LinearLayout>
        <!--seekbar區域-->
        <LinearLayout
            android:id="@+id/seekbar_linearLayout"
            android:layout_width="match_parent"
            android:layout_height="20dp"
            android:gravity="center_vertical"
            android:orientation="horizontal"
            android:visibility="gone">

            <TextView
                android:id="@+id/seekbar_linearLayout_t1"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:text="----" />

            <SeekBar
                android:id="@+id/seekbar"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_gravity="center"
                android:layout_weight="0.8"
                android:gravity="center" />

            <TextView
                android:id="@+id/seekbar_linearLayout_t2"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:text="----" />
        </LinearLayout>
        <!--x、y、cx、cy-->
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <!--x與y-->
            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <LinearLayout
                    android:id="@+id/x"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="x" />

                    <EditText
                        android:layout_width="50dip"
                        android:layout_height="wrap_content"
                        android:inputType="number" />

                    <Button
                        android:layout_width="50dip"
                        android:layout_height="wrap_content"
                        android:text="+" />

                    <Button
                        android:layout_width="50dip"
                        android:layout_height="wrap_content"
                        android:text="-" />
                </LinearLayout>

                <LinearLayout
                    android:id="@+id/y"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="y" />

                    <EditText
                        android:layout_width="50dip"
                        android:layout_height="wrap_content"
                        android:inputType="number" />

                    <Button
                        android:layout_width="50dip"
                        android:layout_height="wrap_content"
                        android:text="+" />

                    <Button
                        android:layout_width="50dip"
                        android:layout_height="wrap_content"
                        android:text="-" />
                </LinearLayout>
            </LinearLayout>
            <!--cx與cy-->
            <RelativeLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentRight="true"
                    android:orientation="vertical">

                    <LinearLayout
                        android:id="@+id/cx"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:orientation="horizontal">

                        <TextView
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:text="cx" />

                        <EditText
                            android:layout_width="50dip"
                            android:layout_height="wrap_content"
                            android:inputType="number" />

                        <Button
                            android:layout_width="50dip"
                            android:layout_height="wrap_content"
                            android:text="+" />

                        <Button
                            android:layout_width="50dip"
                            android:layout_height="wrap_content"
                            android:text="-" />
                    </LinearLayout>

                    <LinearLayout
                        android:id="@+id/cy"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:orientation="horizontal">

                        <TextView
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:text="cy" />

                        <EditText
                            android:layout_width="50dip"
                            android:layout_height="wrap_content"
                            android:inputType="number" />

                        <Button
                            android:layout_width="50dip"
                            android:layout_height="wrap_content"
                            android:text="+" />

                        <Button
                            android:layout_width="50dip"
                            android:layout_height="wrap_content"
                            android:text="-" />
                    </LinearLayout>
                </LinearLayout>
            </RelativeLayout>
        </LinearLayout>
        <!--去除水印listview-->
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="去除水印"
            android:textAlignment="center" />

        <ListView
            android:id="@+id/logoList"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"></ListView>
        <FrameLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">
            <SurfaceView
                android:id="@+id/sv"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"></SurfaceView>
            <com.example.penguinvideoedit.videodelogo.DragScaleView
                android:id="@+id/ds"
                android:layout_width="100dip"
                android:layout_height="100dip"
                android:clickable="true"
                />
        </FrameLayout>
    </LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
這裏我把改變的代碼相比之前的變化，應該就是這幾個標紅的地方，其它好像沒有什麽變化，那麽我想這東西應該是僅限與根綫性佈局上的處理，子級的綫性佈局就不用處理這個了。