Also, die erste, was Sie tun sollten, ist die Layout-Datei zu optimieren - Toolbar
oben durch Entfernen seiner layout_anchor
Attribut festgelegt werden.
<android.support.design.widget.CoordinatorLayout
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:ignore="RtlHardcoded"
>
<android.support.design.widget.AppBarLayout
android:id="@+id/main.appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
>
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/main.collapsing"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
>
<ImageView
android:id="@+id/main.imageview.placeholder"
android:layout_width="match_parent"
android:layout_height="300dp"
android:scaleType="centerCrop"
android:src="@drawable/quila2"
android:tint="#11000000"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.9"
/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="none"
app:behavior_overlapTop="24dp"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
>
<android.support.v7.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dp"
app:cardElevation="8dp"
app:contentPadding="16dp"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:lineSpacingExtra="8dp"
android:text="@string/lorem"
android:textSize="18sp"
/>
</android.support.v7.widget.CardView>
</android.support.v4.widget.NestedScrollView>
<android.support.v7.widget.Toolbar
android:id="@+id/main.toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@color/primary"
app:theme="@style/ThemeOverlay.AppCompat.Dark"
app:title="">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="@+id/main.textview.title"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginLeft="8dp"
android:gravity="center_vertical"
android:text="@string/quila_name2"
android:textColor="@android:color/white"
android:textSize="20sp"/>
</LinearLayout>
</android.support.v7.widget.Toolbar>
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="@dimen/image_width"
android:layout_height="@dimen/image_width"
android:layout_gravity="center_horizontal"
android:src="@drawable/quila"
app:border_color="@android:color/white"
app:border_width="2dp"
app:finalHeight="@dimen/image_final_width"
app:layout_behavior="saulmm.myapplication.AvatarImageBehavior"
/>
</android.support.design.widget.CoordinatorLayout>
Hinweis habe ich entfernt auch main.framelayout.title
Abschnitt, wie ich es als Teil eines Toolbar
prüfen, wie gut. Und ich habe auch onOffsetChanged()
und alle damit verbundenen Methoden in MainActivity
entfernt und unseren Titel Toolbar
immer sichtbar gemacht.
Zweitens, natürlich sollten Sie Änderungen in der AvatarImageBehavior
Klasse vornehmen. Die Hauptsache hier ist, dass jetzt Ihre ImageView
von NestedScrollView
statt Toolbar
abhängig ist. Aber da wir nicht mehr auf Toolbar
angewiesen sind, brauchen wir es noch, um die mFinalYPosition
zu definieren, also habe ich die Methode hinzugefügt, um auch die Toolbar
zu finden. Hier ist das Verhalten:
public class AvatarImageBehavior extends CoordinatorLayout.Behavior<CircleImageView> {
private final static float MIN_AVATAR_PERCENTAGE_SIZE = 0.3f;
private final static int EXTRA_FINAL_AVATAR_PADDING = 80;
private final static String TAG = "behavior";
private Context mContext;
private float mCustomFinalYPosition;
private float mCustomStartXPosition;
private float mCustomStartToolbarPosition;
private float mCustomStartHeight;
private float mCustomFinalHeight;
private float mAvatarMaxSize;
private float mStartPosition;
private int mStartXPosition;
private float mStartToolbarPosition;
private int mStartYPosition;
private int mFinalYPosition;
private int mStartHeight;
private int mFinalXPosition;
private float mChangeBehaviorPoint;
public AvatarImageBehavior(Context context, AttributeSet attrs) {
mContext = context;
if (attrs != null) {
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AvatarImageBehavior);
mCustomFinalYPosition = a.getDimension(R.styleable.AvatarImageBehavior_finalYPosition, 0);
mCustomStartXPosition = a.getDimension(R.styleable.AvatarImageBehavior_startXPosition, 0);
mCustomStartToolbarPosition = a.getDimension(R.styleable.AvatarImageBehavior_startToolbarPosition, 0);
mCustomStartHeight = a.getDimension(R.styleable.AvatarImageBehavior_startHeight, 0);
mCustomFinalHeight = a.getDimension(R.styleable.AvatarImageBehavior_finalHeight, 0);
a.recycle();
}
init();
}
private void init() {
bindDimensions();
}
private void bindDimensions() {
mAvatarMaxSize = mContext.getResources().getDimension(R.dimen.image_width);
}
@Override
public boolean layoutDependsOn(CoordinatorLayout parent, CircleImageView child, View dependency) {
return dependency instanceof NestedScrollView;
}
@Override
public boolean onDependentViewChanged(CoordinatorLayout parent, CircleImageView child, View dependency) {
maybeInitProperties(parent, child, dependency);
final int maxScrollDistance = (int) (mStartToolbarPosition);
float expandedPercentageFactor = dependency.getY()/maxScrollDistance;
if (expandedPercentageFactor < mChangeBehaviorPoint) {
float heightFactor = (mChangeBehaviorPoint - expandedPercentageFactor)/mChangeBehaviorPoint;
float distanceXToSubtract = ((mStartXPosition - mFinalXPosition)
* heightFactor) + (child.getHeight()/2);
float distanceYToSubtract = ((mStartYPosition - mFinalYPosition)
* (1f - expandedPercentageFactor)) + (child.getHeight()/2);
child.setX(mStartXPosition - distanceXToSubtract);
child.setY(mStartYPosition - distanceYToSubtract);
float heightToSubtract = ((mStartHeight - mCustomFinalHeight) * heightFactor);
CoordinatorLayout.LayoutParams lp = (CoordinatorLayout.LayoutParams) child.getLayoutParams();
lp.width = (int) (mStartHeight - heightToSubtract);
lp.height = (int) (mStartHeight - heightToSubtract);
child.setLayoutParams(lp);
} else {
float distanceYToSubtract = ((mStartYPosition - mFinalYPosition)
* (1f - expandedPercentageFactor)) + (mStartHeight/2);
child.setX(mStartXPosition - child.getWidth()/2);
child.setY(mStartYPosition - distanceYToSubtract);
CoordinatorLayout.LayoutParams lp = (CoordinatorLayout.LayoutParams) child.getLayoutParams();
lp.width = (int) (mStartHeight);
lp.height = (int) (mStartHeight);
child.setLayoutParams(lp);
}
return true;
}
private void maybeInitProperties(CoordinatorLayout parent, CircleImageView child, View dependency) {
if (mStartYPosition == 0)
mStartYPosition = (int) (dependency.getY());
View toolbar = tryFindToolbarInLayout(parent);
if (mFinalYPosition == 0 && toolbar != null) {
mFinalYPosition = (toolbar.getHeight()/2);
}
if (mStartHeight == 0)
mStartHeight = child.getHeight();
if (mStartXPosition == 0)
mStartXPosition = (int) (child.getX() + (child.getWidth()/2));
if (mFinalXPosition == 0)
mFinalXPosition = dependency.getContext().getResources().getDisplayMetrics().widthPixels - mContext.getResources().getDimensionPixelOffset(R.dimen.abc_action_bar_content_inset_material)
- ((int) mCustomFinalHeight/2);
if (mStartToolbarPosition == 0)
mStartToolbarPosition = dependency.getY();
if (mChangeBehaviorPoint == 0 && toolbar != null) {
mChangeBehaviorPoint = (child.getHeight() - mCustomFinalHeight)/(mStartYPosition - mFinalYPosition - toolbar.getHeight());
}
}
private View tryFindToolbarInLayout(CoordinatorLayout parent) {
for (int i = 0; i < parent.getChildCount(); i++) {
View child = parent.getChildAt(i);
if (child instanceof Toolbar)
return child;
}
return null;
}
public int getStatusBarHeight() {
int result = 0;
int resourceId = mContext.getResources().getIdentifier("status_bar_height", "dimen", "android");
if (resourceId > 0) {
result = mContext.getResources().getDimensionPixelSize(resourceId);
}
return result;
}
}
Das ist, was ich tun verwaltet:
dank rom4ek. Ich werde versuchen, es als Antwort zu markieren, wenn es funktioniert! – AnswerDroid
das funktioniert fast perfekt. nur bekomme ich ein Problem intermitenty.http: //s000.tinyupload.com/? file_id = 43364424783018665227 – AnswerDroid