Android 约束布局使用过多内存 (ram)（内存泄漏）

Question

我真的不明白约束布局会发生什么。

我的旧 ui 仅使用 15 MB 内存，而新 ui 使用 ~400MB

有人有想法吗？

旧ui

在实际 Android 设备上使用 ~15MB 的内存

<?xml version="1.0" encoding="utf-8"?>

<TextView
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:text=" 11 January 2016"
    android:id="@+id/dateTv"
    android:gravity="center_horizontal"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    android:layout_marginStart="16dp"
    tools:layout_constraintLeft_creator="1"
    app:layout_constraintTop_toTopOf="@+id/constraintLayout4"
    android:layout_marginTop="16dp" />


<TextView
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:text="12 : 59 PM"
    android:id="@+id/timeTv"
    android:gravity="center_horizontal"
    app:layout_constraintLeft_toRightOf="@+id/dateTv"
    app:layout_constraintTop_toTopOf="@+id/dateTv"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    android:layout_marginEnd="16dp"
    app:layout_constraintHorizontal_bias="1.0" />

<SeekBar
    android:layout_width="0dp"
    android:layout_height="20dp"
    android:id="@+id/seekBarFoodQuantity"
    android:max="10"
    app:layout_constraintLeft_toRightOf="@+id/decrease"
    android:layout_marginStart="8dp"
    tools:layout_constraintLeft_creator="1"
    app:layout_constraintTop_toBottomOf="@+id/timeTv"
    android:layout_marginTop="48dp"
    app:layout_constraintRight_toLeftOf="@+id/increase"
    android:layout_marginEnd="8dp"
    tools:layout_constraintRight_creator="1" />

<TextView
    android:text="-"
    android:gravity="center"
    android:layout_width="49dp"
    android:layout_height="49dp"
    android:id="@+id/decrease"
    android:textSize="40sp"
    android:background="@color/red_300"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    android:layout_marginStart="8dp"
    app:layout_constraintTop_toTopOf="@+id/seekBarFoodQuantity"
    app:layout_constraintBottom_toBottomOf="@+id/seekBarFoodQuantity" />

<TextView
    android:text="+"
    android:layout_width="49dp"
    android:layout_height="49dp"
    android:id="@+id/increase"
    android:textSize="40sp"
    android:background="@color/green_400"
    android:gravity="center"
    app:layout_constraintTop_toTopOf="@+id/seekBarFoodQuantity"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    android:layout_marginEnd="8dp"
    app:layout_constraintBottom_toBottomOf="@+id/seekBarFoodQuantity" />

<TextView
    android:text="@string/quantity"
    android:layout_width="137dp"
    android:layout_height="49dp"
    android:id="@+id/tvQuantity"
    android:textSize="20sp"
    android:gravity="center"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    tools:layout_constraintLeft_creator="1"
    app:layout_constraintTop_toBottomOf="@+id/seekBarFoodQuantity"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    tools:layout_constraintRight_creator="1"
    app:layout_constraintBottom_toBottomOf="@+id/constraintLayout4"
    android:layout_marginBottom="16dp"
    app:layout_constraintVertical_bias="0.0" />

<TextView
    android:text="Save"
    android:layout_width="137dp"
    android:layout_height="49dp"
    android:id="@+id/tvSave"
    android:textSize="20sp"
    android:gravity="center"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    tools:layout_constraintLeft_creator="1"
    app:layout_constraintTop_toBottomOf="@+id/seekBarFoodQuantity"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    tools:layout_constraintRight_creator="1"
    app:layout_constraintBottom_toBottomOf="@+id/constraintLayout4"
    android:layout_marginBottom="16dp" />

<include layout="@layout/bottom_bar" android:id="@+id/bottombarAddFood"
    android:layout_width="0dp"
    android:layout_height="72dp"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    app:layout_constraintBottom_toBottomOf="@+id/constraintLayout4" />

新建ui

在超过 400 MB 的实际 Android 设备上使用 ram！！！

<?xml version="1.0" encoding="utf-8"?>

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:text=" 11 January 2016"
    android:id="@+id/dateTv"
    android:gravity="center_horizontal"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    android:layout_marginStart="16dp"
    app:layout_constraintTop_toBottomOf="@+id/editText2"
    android:layout_marginTop="8dp" />


<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:text="12 : 59 PM"
    android:id="@+id/timeTv"
    android:gravity="center_horizontal"
    app:layout_constraintTop_toTopOf="@+id/dateTv"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    android:layout_marginEnd="16dp"
    app:layout_constraintBottom_toBottomOf="@+id/dateTv" />

<SeekBar
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:id="@+id/seekBarFoodQuantity"
    android:max="10"
    app:layout_constraintLeft_toRightOf="@+id/decrease"
    android:layout_marginStart="8dp"
    app:layout_constraintTop_toTopOf="@+id/decrease"
    app:layout_constraintRight_toLeftOf="@+id/increase"
    android:layout_marginEnd="8dp"
    app:layout_constraintBottom_toBottomOf="@+id/decrease" />

<TextView
    android:text="-"
    android:gravity="center"
    android:layout_width="49dp"
    android:layout_height="49dp"
    android:id="@+id/decrease"
    android:textSize="40sp"
    android:background="@color/red_300"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    android:layout_marginStart="16dp"
    app:layout_constraintTop_toBottomOf="@+id/textView2"
    android:layout_marginTop="24dp" />

<TextView
    android:text="+"
    android:layout_width="49dp"
    android:layout_height="49dp"
    android:id="@+id/increase"
    android:textSize="40sp"
    android:background="@color/green_400"
    android:gravity="center"
    app:layout_constraintTop_toTopOf="@+id/seekBarFoodQuantity"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    android:layout_marginEnd="16dp"
    app:layout_constraintBottom_toBottomOf="@+id/seekBarFoodQuantity" />

<TextView
    android:text="@string/quantity"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/tvQuantity"
    android:textSize="20sp"
    android:gravity="center"
    app:layout_constraintLeft_toLeftOf="@+id/seekBarFoodQuantity"
    app:layout_constraintTop_toBottomOf="@+id/seekBarFoodQuantity"
    android:layout_marginTop="8dp"
    app:layout_constraintRight_toRightOf="@+id/seekBarFoodQuantity" />

<TextView
    android:text="Save"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/tvSave"
    android:textSize="20sp"
    android:gravity="center"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    android:layout_marginStart="16dp"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    android:layout_marginEnd="16dp"
    app:layout_constraintBottom_toTopOf="@+id/bottombarAddFood"
    android:layout_marginBottom="8dp" />

<include layout="@layout/bottom_bar" android:id="@+id/bottombarAddFood"
    android:layout_width="wrap_content"
    android:layout_height="72dp"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    app:layout_constraintBottom_toBottomOf="@+id/constraintLayout4" />

<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:inputType="textPersonName"
    android:text="Name"
    android:ems="10"
    android:id="@+id/editText2"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    android:layout_marginStart="16dp"
    app:layout_constraintTop_toTopOf="@+id/constraintLayout4"
    android:layout_marginTop="16dp"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    android:layout_marginEnd="16dp" />

<RadioButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/radioLittle"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    android:layout_marginStart="16dp"
    app:layout_constraintTop_toBottomOf="@+id/dateTv"
    android:layout_marginTop="32dp"
    app:layout_constraintRight_toLeftOf="@+id/radioMedium"
    android:layout_marginEnd="8dp"
    app:layout_constraintHorizontal_bias="0.33" />

<RadioButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/radioMedium"
    app:layout_constraintLeft_toLeftOf="@+id/constraintLayout4"
    android:layout_marginStart="16dp"
    app:layout_constraintTop_toTopOf="@+id/radioMost"
    app:layout_constraintRight_toRightOf="@+id/constraintLayout4"
    android:layout_marginEnd="16dp"
    app:layout_constraintBottom_toBottomOf="@+id/radioMost"
    app:layout_constraintHorizontal_bias="0.75"
    app:layout_constraintVertical_bias="1.0" />

<RadioButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/radioMost"
    app:layout_constraintLeft_toRightOf="@+id/radioLittle"
    android:layout_marginStart="8dp"
    app:layout_constraintTop_toTopOf="@+id/radioLittle"
    app:layout_constraintRight_toLeftOf="@+id/radioMedium"
    android:layout_marginEnd="8dp"
    app:layout_constraintBottom_toBottomOf="@+id/radioLittle" />

<TextView
    android:text="Little"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/textView2"
    app:layout_constraintLeft_toLeftOf="@+id/radioLittle"
    app:layout_constraintTop_toBottomOf="@+id/radioLittle"
    android:layout_marginTop="8dp"
    app:layout_constraintRight_toRightOf="@+id/radioLittle" />

<TextView
    android:text="Medium"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/textView3"
    app:layout_constraintLeft_toLeftOf="@+id/radioMost"
    app:layout_constraintTop_toBottomOf="@+id/radioMost"
    android:layout_marginTop="8dp"
    app:layout_constraintRight_toRightOf="@+id/radioMost" />

<TextView
    android:text="Most"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/textView4"
    app:layout_constraintLeft_toLeftOf="@+id/radioMedium"
    app:layout_constraintTop_toBottomOf="@+id/radioMedium"
    android:layout_marginTop="8dp"
    app:layout_constraintRight_toRightOf="@+id/radioMedium" />

Answer 1

看来bug在编译 'com.android.support.constraint:constraint-layout:1.0.0-alpha4'

新的 ui 使用 alpha4 而旧的 ui 使用 alpha3

然后我用

compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha3'

与新 ui。 现在 alpha7 上的错误也已修复

Answer 2

alpha 4 中存在一个错误，该错误在 alpha 6 中得到解决，这可能解释了您所看到的情况（这显然是完全不正常的，约束布局实际上应该使用很少的 ram）。你能检查一下这是否解决了你的问题，如果没有，请提交错误？谢谢！

Android 约束布局使用过多内存 (ram)（内存泄漏）

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