使用LayoutTransition.CHANGING时，某些布局比其他布局扩展得慢

Question

我有19个水平线性布局，垂直排列在另一个线性布局中。他们几乎是空的，并且onclick显示文本。我正在使用

设置布局动画

parentOne.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);

出于某种原因，前7个布局似乎打开onClick比第8个慢一点。只有一瞬间，但是当我打开它时，我已经让其他人看看它，以确保我不会疯狂。我会发布整个文件，但它是巨大的，超过了这个上允许的最大文本。所以这里是肉和土豆。那么，为什么我的布局开放速度比其他布局慢？数字8-19立即打开onClick和1-7有一个明显的小延迟。

Java On Create

    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getSupportActionBar().hide();
    setContentView(R.layout.tacticalfieldcarestudy);

    LinearLayout parentOne = (LinearLayout) findViewById(R.id.TFCLayoutOne);
    LinearLayout parentTwo = (LinearLayout) findViewById(R.id.TFCLayoutTwo);
    LinearLayout parentTwoBullets = (LinearLayout)findViewById(R.id.TFCLayoutTwoBullets);
    LinearLayout parentThree = (LinearLayout)findViewById(R.id.TFCLayoutThree);
    LinearLayout parentThreeBullets = (LinearLayout)findViewById(R.id.TFCLayoutThreeBullets);
    LinearLayout parentFour = (LinearLayout)findViewById(R.id.TFCLayoutFour);
    LinearLayout parentFourBullets = (LinearLayout)findViewById(R.id.TFCLayoutFourBullets);
    LinearLayout parentFive = (LinearLayout)findViewById(R.id.TFCLayoutFive);
    LinearLayout parentFiveBullets = (LinearLayout)findViewById(R.id.TFCLayoutFiveBullets);
    LinearLayout parentSix = (LinearLayout)findViewById(R.id.TFCLayoutSix);
    LinearLayout parentSixBullets = (LinearLayout)findViewById(R.id.TFCLayoutSixBullets);
    LinearLayout parentSeven = (LinearLayout)findViewById(R.id.TFCLayoutSeven);
    LinearLayout parentSevenBullets = (LinearLayout)findViewById(R.id.TFCLayoutSevenBullets);
    LinearLayout parentEight = (LinearLayout)findViewById(R.id.TFCLayoutEight);
    LinearLayout parentEightBullets = (LinearLayout)findViewById(R.id.TFCLayoutEightBullets);
    LinearLayout parentNine = (LinearLayout)findViewById(R.id.TFCLayoutNine);
    LinearLayout parentNineBullets = (LinearLayout)findViewById(R.id.TFCLayoutNineBullets);
    LinearLayout parentTen = (LinearLayout)findViewById(R.id.TFCLayoutTen);
    LinearLayout parentTenBullets = (LinearLayout)findViewById(R.id.TFCLayoutTenBullets);
    LinearLayout parentEleven = (LinearLayout)findViewById(R.id.TFCLayoutEleven);
    LinearLayout parentTwelve = (LinearLayout)findViewById(R.id.TFCLayoutTwelve);
    LinearLayout parentThirteen = (LinearLayout)findViewById(R.id.TFCLayoutThirteen);
    LinearLayout parentThirteenBullets = (LinearLayout)findViewById(R.id.TFCLayoutThirteenBullets);
    LinearLayout parentFourteen = (LinearLayout)findViewById(R.id.TFCLayoutFourteen);
    LinearLayout parentFifteen = (LinearLayout)findViewById(R.id.TFCLayoutFifteen);
    LinearLayout parentFifteenBullets = (LinearLayout)findViewById(R.id.TFCLayoutFifteenBullets);
    LinearLayout parentSixteen = (LinearLayout)findViewById(R.id.TFCLayoutSixteen);
    LinearLayout parentSixteenBullets = (LinearLayout)findViewById(R.id.TFCLayoutSixteenBullets);
    LinearLayout parentSeventeen = (LinearLayout)findViewById(R.id.TFCLayoutSeventeen);
    LinearLayout parentSeventeenBullets = (LinearLayout)findViewById(R.id.TFCLayoutSeventeenBullets);
    LinearLayout parentEighteen = (LinearLayout)findViewById(R.id.TFCLayoutEighteen);
    LinearLayout parentEighteenBullets = (LinearLayout)findViewById(R.id.TFCLayoutEighteenBullets);
    LinearLayout parentNineteen = (LinearLayout)findViewById(R.id.TFCLayoutNineteen);
    LinearLayout parentNineteenBullets = (LinearLayout)findViewById(R.id.TFCLayoutNineteenBullets);

    parentOne.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentTwo.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentTwoBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentThree.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentThreeBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentFour.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentFourBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentFive.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentFiveBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentSix.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentSixBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentSeven.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentSevenBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentEight.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentEightBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentNine.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentNineBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentTen.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentTenBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentEleven.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentTwelve.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentThirteen.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentThirteenBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentFourteen.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentFifteen.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentFifteenBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentSixteen.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentSixteenBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentSeventeen.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentSeventeenBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentEighteen.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentEighteenBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentNineteen.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
    parentNineteenBullets.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);
}

7种Java方法中的一种，在onClick上有不必要的延迟

private boolean mOpenOne = false;

public void toggleOne(View view){
    TextView stepOne = (TextView)findViewById(R.id.stepOne);
    ImageView toggle = (ImageView)findViewById(R.id.toggleStepOne);

    if(mOpenOne){
        stepOne.setText("Step 1:");
        toggle.setImageResource(R.drawable.open);
    }
    else{
        stepOne.setText("1. Casualties with an altered mental status should be disarmed immediately.");
        toggle.setImageResource(R.drawable.close);
    }
    mOpenOne = !mOpenOne;
}

带有意外延迟的XML

        <LinearLayout
        android:id="@+id/TFCLayoutOne"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:padding="5dp"
        android:animateLayoutChanges="true"
        android:onClick="toggleOne"
        android:background="#606060"
        >

        <ImageView
            android:id="@+id/toggleStepOne"
            android:src="@drawable/open"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="5dp"
            android:layout_gravity="center_vertical"
            />


        <TextView
            android:id="@+id/stepOne"
            android:text="Step 1:"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingLeft="0dp"
            style="@style/Bullet"
            />

    </LinearLayout>

Java第8种方法，可以毫不拖延地工作

private boolean mOpenEight = false;

public void toggleEight(View view){
    TextView stepEight = (TextView)findViewById(R.id.stepEight);
    ImageView toggle = (ImageView)findViewById(R.id.toggleStepEight);

    if(mOpenEight){
        stepEight.setText("Step 8:");
        TextView stepEightBulletOne = (TextView)findViewById(R.id.stepEightBulletOne);
        TextView stepEightBulletTwo = (TextView)findViewById(R.id.stepEightBulletTwo);
        TextView stepEightBulletThree = (TextView)findViewById(R.id.stepEightBulletThree);
        TextView stepEightBulletFour = (TextView)findViewById(R.id.stepEightBulletFour);
        TextView stepEightBulletFive = (TextView)findViewById(R.id.stepEightBulletFive);
        TextView stepEightBulletSix = (TextView)findViewById(R.id.stepEightBulletSix);
        stepEightBulletOne.setText("");
        stepEightBulletTwo.setText("");
        stepEightBulletThree.setText("");
        stepEightBulletFour.setText("");
        stepEightBulletFive.setText("");
        stepEightBulletSix.setText("");
        stepEightBulletOne.getLayoutParams().height = 0;
        stepEightBulletTwo.getLayoutParams().height = 0;
        stepEightBulletThree.getLayoutParams().height = 0;
        stepEightBulletFour.getLayoutParams().height = 0;
        stepEightBulletFive.getLayoutParams().height = 0;
        stepEightBulletSix.getLayoutParams().height = 0;

        toggle.setImageResource(R.drawable.open);
    }
    else{
        stepEight.setText("8. Prevention of hypothermia");
        TextView stepEightBulletOne = (TextView)findViewById(R.id.stepEightBulletOne);
        TextView stepEightBulletTwo = (TextView)findViewById(R.id.stepEightBulletTwo);
        TextView stepEightBulletThree = (TextView)findViewById(R.id.stepEightBulletThree);
        TextView stepEightBulletFour = (TextView)findViewById(R.id.stepEightBulletFour);
        TextView stepEightBulletFive = (TextView)findViewById(R.id.stepEightBulletFive);
        TextView stepEightBulletSix = (TextView)findViewById(R.id.stepEightBulletSix);
        stepEightBulletOne.setText("a. Minimize casualty's exposure to the elements. Keep protective gear on or with the casualty if feasible.");
        stepEightBulletTwo.setText("b. Replace wet clothing with dry if possible. Get the casualty onto an insulated surface as soon as possible.");
        stepEightBulletThree.setText("c. Apply the Ready-Heat Blanket from the Hypothermia Prevention and Management Kit (HPMK) to the casualty's torso (not directly on the skin) and cover the casualty with the Heat-Reflective Shell (HRS).");
        stepEightBulletFour.setText("d. If an HRS is not available, the previously recommended combination of the Blizzard Survival Blanket and the Ready Heat blanket may also be used.");
        stepEightBulletFive.setText("e. If the items mentioned above are not available, use dry blankets, poncho liners, sleeping bags, or anything that will retain heat and keep the casualty dry.");
        stepEightBulletSix.setText("f. Warm fluids are preferred if IV fluids are required.");
        stepEightBulletOne.getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
        stepEightBulletTwo.getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
        stepEightBulletThree.getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
        stepEightBulletFour.getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
        stepEightBulletFive.getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
        stepEightBulletSix.getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
        toggle.setImageResource(R.drawable.close);
    }
    mOpenEight = !mOpenEight;
}

其中一个布局的XML，没有延迟

<LinearLayout
    android:id="@+id/TFCLayoutEightBullets"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:background="#A0A0A0"
    android:animateLayoutChanges="true"
    android:onClick="toggleEight"
    >

    <LinearLayout
        android:id="@+id/TFCLayoutEight"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:padding="5dp"
        android:animateLayoutChanges="true"
        android:background="#A0A0A0"
        >

        <ImageView
            android:id="@+id/toggleStepEight"
            android:src="@drawable/open"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="5dp"
            android:layout_gravity="center_vertical"
            />


        <TextView
            android:id="@+id/stepEight"
            android:text="Step 8:"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingLeft="0dp"
            style="@style/Bullet"
            />

    </LinearLayout>

    <TextView
        android:id="@+id/stepEightBulletOne"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        style="@style/BulletIndented"
        />

    <TextView
        android:id="@+id/stepEightBulletTwo"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        style="@style/BulletIndented"
        />

    <TextView
        android:id="@+id/stepEightBulletThree"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        style="@style/BulletIndented"
        />

    <TextView
        android:id="@+id/stepEightBulletFour"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        style="@style/BulletIndented"
        />

    <TextView
        android:id="@+id/stepEightBulletFive"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        style="@style/BulletIndented"
        />
    <TextView
        android:id="@+id/stepEightBulletSix"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        style="@style/BulletIndented"
        />
    </LinearLayout>

Answer 1

Well I figured it out. It looks as though it was a processing issue. If I had to guess I would say that each time I called a method it would search through the giant list of linearlayouts in the onCreate method for the animation to open it.

In my onCreate method I define a CRAP TON of linear layouts as such

LinearLayout parentOne = (LinearLayout) findViewById(R.id.TFCLayoutOne);
parentOne.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);

The Fix:

I separated ALL of them and placed them all in their respective onClick methods. Now, when I click them they actually open faster than my other pages that are setup similarly, so I will be changing those as well. My java methods were:

private boolean mOpenOne = false;

public void toggleOne(View view){
TextView stepOne = (TextView)findViewById(R.id.stepOne);
ImageView toggle = (ImageView)findViewById(R.id.toggleStepOne);

if(mOpenOne){
    stepOne.setText("Step 1:");
    toggle.setImageResource(R.drawable.open);
}
else{
    stepOne.setText("1. Casualties with an altered mental status should be disarmed immediately.");
    toggle.setImageResource(R.drawable.close);
}
mOpenOne = !mOpenOne;

}

I have changed them to:

private boolean mOpenOne = false;

public void toggleOne(View view){
    TextView stepOne = (TextView)findViewById(R.id.stepOne);
    ImageView toggle = (ImageView)findViewById(R.id.toggleStepOne);
    LinearLayout parentOne = (LinearLayout) findViewById(R.id.TFCLayoutOne);
    parentOne.getLayoutTransition().enableTransitionType(LayoutTransition.CHANGING);

    if(mOpenOne){
        stepOne.setText("Step 1:");
        toggle.setImageResource(R.drawable.open);
    }
    else{
        stepOne.setText("1. Casualties with an altered mental status should be disarmed immediately.");
        toggle.setImageResource(R.drawable.close);
    }
    mOpenOne = !mOpenOne;
}

Hope this helps others!