Как анимировать кнопку вверх в гамбургер, как в Gmail
Я видел решения для внедрения гамбургера в навигацию вверх и наоборот. И я видел это только там, где используется DrawerLayout.
Теперь у меня есть активность A и B.
Действие A - это действие запуска, у него есть значок гамбургера на панели действий, и он реализует анимацию кнопки вверх / гамбургера, которая вставляет и выводит DreawerLayout.
Где-то в Занятии A есть кнопка, которая запускает Занятие B. Занятие B имеет support.v7 ActionBar и
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
называется в onCreate, Это устанавливает кнопку вверх, которая при нажатии возвращает вас к занятию А.
Как настроить кнопку вверх в упражнении B для анимации гамбургера в упражнении A?
Gmail делает это: когда вы нажимаете кнопку "вверх" в полном письме, чтобы перейти к списку писем.
2 ответа
Хорошо, это довольно долго объяснять. Проще говоря, вам нужно получить ссылку на DrawerToogle чтобы манипулировать этим. Как? Вы должны предоставить собственную реализацию ActionBarDrawerToggle учебный класс.
Вот пример (с большим количеством копий и вставок из собственной реализации Google)
package com.example.navigationdrawertest;
import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.drawable.Drawable;
import android.support.annotation.Nullable;
import android.support.annotation.StringRes;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.graphics.drawable.DrawerArrowDrawable;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
/**
* This class provides a handy way to tie together the functionality of
* {@link android.support.v4.widget.DrawerLayout} and the framework <code>ActionBar</code> to
* implement the recommended design for navigation drawers.
*
* <p>To use <code>ActionBarDrawerToggle</code>, create one in your Activity and call through
* to the following methods corresponding to your Activity callbacks:</p>
*
* <ul>
* <li>{@link android.app.Activity#onConfigurationChanged(android.content.res.Configuration)
* onConfigurationChanged}
* <li>{@link android.app.Activity#onOptionsItemSelected(android.view.MenuItem)
* onOptionsItemSelected}</li>
* </ul>
*
* <p>Call {@link #syncState()} from your <code>Activity</code>'s
* {@link android.app.Activity#onPostCreate(android.os.Bundle) onPostCreate} to synchronize the
* indicator with the state of the linked DrawerLayout after <code>onRestoreInstanceState</code>
* has occurred.</p>
*
* <p><code>ActionBarDrawerToggle</code> can be used directly as a
* {@link android.support.v4.widget.DrawerLayout.DrawerListener}, or if you are already providing
* your own listener, call through to each of the listener methods from your own.</p>
*
* <p>
* You can customize the the animated toggle by defining the
* {@link android.support.v7.appcompat.R.styleable#DrawerArrowToggle drawerArrowStyle} in your
* ActionBar theme.
*/
public class ActionBarDrawerToggle implements DrawerLayout.DrawerListener {
/**
* Allows an implementing Activity to return an {@link ActionBarDrawerToggle.Delegate} to use
* with ActionBarDrawerToggle.
*/
public interface DelegateProvider {
/**
* @return Delegate to use for ActionBarDrawableToggles, or null if the Activity
* does not wish to override the default behavior.
*/
@Nullable
Delegate getDrawerToggleDelegate();
}
public interface Delegate {
/**
* Set the Action Bar's up indicator drawable and content description.
*
* @param upDrawable - Drawable to set as up indicator
* @param contentDescRes - Content description to set
*/
void setActionBarUpIndicator(Drawable upDrawable, @StringRes int contentDescRes);
/**
* Set the Action Bar's up indicator content description.
*
* @param contentDescRes - Content description to set
*/
void setActionBarDescription(@StringRes int contentDescRes);
/**
* Returns the drawable to be set as up button when DrawerToggle is disabled
*/
Drawable getThemeUpIndicator();
/**
* Returns the context of ActionBar
*/
Context getActionBarThemedContext();
/**
* Returns whether navigation icon is visible or not.
* Used to print warning messages in case developer forgets to set displayHomeAsUp to true
*/
boolean isNavigationVisible();
}
private final Delegate mActivityImpl;
private final DrawerLayout mDrawerLayout;
private DrawerToggle mSlider;
private Drawable mHomeAsUpIndicator;
private boolean mDrawerIndicatorEnabled = true;
private boolean mHasCustomUpIndicator;
private final int mOpenDrawerContentDescRes;
private final int mCloseDrawerContentDescRes;
// used in toolbar mode when DrawerToggle is disabled
private View.OnClickListener mToolbarNavigationClickListener;
// If developer does not set displayHomeAsUp, DrawerToggle won't show up.
// DrawerToggle logs a warning if this case is detected
private boolean mWarnedForDisplayHomeAsUp = false;
/**
* Construct a new ActionBarDrawerToggle with a Toolbar.
* <p>
* The given {@link Activity} will be linked to the specified {@link DrawerLayout} and
* the Toolbar's navigation icon will be set to a custom drawable. Using this constructor
* will set Toolbar's navigation click listener to toggle the drawer when it is clicked.
* <p>
* This drawable shows a Hamburger icon when drawer is closed and an arrow when drawer
* is open. It animates between these two states as the drawer opens.
* <p>
* String resources must be provided to describe the open/close drawer actions for
* accessibility services.
*
* @param activity The Activity hosting the drawer.
* @param toolbar The toolbar to use if you have an independent Toolbar.
* @param drawerLayout The DrawerLayout to link to the given Activity's ActionBar
* @param openDrawerContentDescRes A String resource to describe the "open drawer" action
* for accessibility
* @param closeDrawerContentDescRes A String resource to describe the "close drawer" action
* for accessibility
*/
public ActionBarDrawerToggle(Activity activity, DrawerLayout drawerLayout,
Toolbar toolbar, @StringRes int openDrawerContentDescRes,
@StringRes int closeDrawerContentDescRes) {
this(activity, toolbar, drawerLayout, null, openDrawerContentDescRes,
closeDrawerContentDescRes);
}
/**
* In the future, we can make this constructor public if we want to let developers customize
* the animation.
*/
<T extends Drawable & DrawerToggle> ActionBarDrawerToggle(Activity activity, Toolbar toolbar,
DrawerLayout drawerLayout, T slider,
@StringRes int openDrawerContentDescRes,
@StringRes int closeDrawerContentDescRes) {
mActivityImpl = new ToolbarCompatDelegate(toolbar);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mDrawerIndicatorEnabled) {
toggle();
} else if (mToolbarNavigationClickListener != null) {
mToolbarNavigationClickListener.onClick(v);
}
}
});
mDrawerLayout = drawerLayout;
mOpenDrawerContentDescRes = openDrawerContentDescRes;
mCloseDrawerContentDescRes = closeDrawerContentDescRes;
if (slider == null) {
mSlider = new DrawerArrowDrawableToggle(activity,
mActivityImpl.getActionBarThemedContext());
} else {
mSlider = slider;
}
mHomeAsUpIndicator = getThemeUpIndicator();
}
/**
* Synchronize the state of the drawer indicator/affordance with the linked DrawerLayout.
*
* <p>This should be called from your <code>Activity</code>'s
* {@link Activity#onPostCreate(android.os.Bundle) onPostCreate} method to synchronize after
* the DrawerLayout's instance state has been restored, and any other time when the state
* may have diverged in such a way that the ActionBarDrawerToggle was not notified.
* (For example, if you stop forwarding appropriate drawer events for a period of time.)</p>
*/
public void syncState() {
if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
mSlider.setPosition(1);
} else {
mSlider.setPosition(0);
}
if (mDrawerIndicatorEnabled) {
setActionBarUpIndicator((Drawable) mSlider,
mDrawerLayout.isDrawerOpen(GravityCompat.START) ?
mCloseDrawerContentDescRes : mOpenDrawerContentDescRes);
}
}
/**
* This method should always be called by your <code>Activity</code>'s
* {@link Activity#onConfigurationChanged(android.content.res.Configuration)
* onConfigurationChanged}
* method.
*
* @param newConfig The new configuration
*/
public void onConfigurationChanged(Configuration newConfig) {
// Reload drawables that can change with configuration
if (!mHasCustomUpIndicator) {
mHomeAsUpIndicator = getThemeUpIndicator();
}
syncState();
}
/**
* This method should be called by your <code>Activity</code>'s
* {@link Activity#onOptionsItemSelected(android.view.MenuItem) onOptionsItemSelected} method.
* If it returns true, your <code>onOptionsItemSelected</code> method should return true and
* skip further processing.
*
* @param item the MenuItem instance representing the selected menu item
* @return true if the event was handled and further processing should not occur
*/
public boolean onOptionsItemSelected(MenuItem item) {
if (item != null && item.getItemId() == android.R.id.home && mDrawerIndicatorEnabled) {
toggle();
return true;
}
return false;
}
private void toggle() {
int drawerLockMode = mDrawerLayout.getDrawerLockMode(GravityCompat.START);
if (mDrawerLayout.isDrawerVisible(GravityCompat.START)
&& (drawerLockMode != DrawerLayout.LOCK_MODE_LOCKED_OPEN)) {
mDrawerLayout.closeDrawer(GravityCompat.START);
} else if (drawerLockMode != DrawerLayout.LOCK_MODE_LOCKED_CLOSED) {
mDrawerLayout.openDrawer(GravityCompat.START);
}
}
/**
* Set the up indicator to display when the drawer indicator is not
* enabled.
* <p>
* If you pass <code>null</code> to this method, the default drawable from
* the theme will be used.
*
* @param indicator A drawable to use for the up indicator, or null to use
* the theme's default
* @see #setDrawerIndicatorEnabled(boolean)
*/
public void setHomeAsUpIndicator(Drawable indicator) {
if (indicator == null) {
mHomeAsUpIndicator = getThemeUpIndicator();
mHasCustomUpIndicator = false;
} else {
mHomeAsUpIndicator = indicator;
mHasCustomUpIndicator = true;
}
if (!mDrawerIndicatorEnabled) {
setActionBarUpIndicator(mHomeAsUpIndicator, 0);
}
}
/**
* Set the up indicator to display when the drawer indicator is not
* enabled.
* <p>
* If you pass 0 to this method, the default drawable from the theme will
* be used.
*
* @param resId Resource ID of a drawable to use for the up indicator, or 0
* to use the theme's default
* @see #setDrawerIndicatorEnabled(boolean)
*/
public void setHomeAsUpIndicator(int resId) {
Drawable indicator = null;
if (resId != 0) {
indicator = mDrawerLayout.getResources().getDrawable(resId);
}
setHomeAsUpIndicator(indicator);
}
/**
* @return true if the enhanced drawer indicator is enabled, false otherwise
* @see #setDrawerIndicatorEnabled(boolean)
*/
public boolean isDrawerIndicatorEnabled() {
return mDrawerIndicatorEnabled;
}
/**
* Enable or disable the drawer indicator. The indicator defaults to enabled.
*
* <p>When the indicator is disabled, the <code>ActionBar</code> will revert to displaying
* the home-as-up indicator provided by the <code>Activity</code>'s theme in the
* <code>android.R.attr.homeAsUpIndicator</code> attribute instead of the animated
* drawer glyph.</p>
*
* @param enable true to enable, false to disable
*/
public void setDrawerIndicatorEnabled(boolean enable) {
if (enable != mDrawerIndicatorEnabled) {
if (enable) {
setActionBarUpIndicator((Drawable) mSlider,
mDrawerLayout.isDrawerOpen(GravityCompat.START) ?
mCloseDrawerContentDescRes : mOpenDrawerContentDescRes);
} else {
setActionBarUpIndicator(mHomeAsUpIndicator, 0);
}
mDrawerIndicatorEnabled = enable;
}
}
public DrawerToggle getSlider() {
return mSlider;
}
/**
* {@link DrawerLayout.DrawerListener} callback method. If you do not use your
* ActionBarDrawerToggle instance directly as your DrawerLayout's listener, you should call
* through to this method from your own listener object.
*
* @param drawerView The child view that was moved
* @param slideOffset The new offset of this drawer within its range, from 0-1
*/
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
mSlider.setPosition(Math.min(1f, Math.max(0, slideOffset)));
}
/**
* {@link DrawerLayout.DrawerListener} callback method. If you do not use your
* ActionBarDrawerToggle instance directly as your DrawerLayout's listener, you should call
* through to this method from your own listener object.
*
* @param drawerView Drawer view that is now open
*/
@Override
public void onDrawerOpened(View drawerView) {
mSlider.setPosition(1);
if (mDrawerIndicatorEnabled) {
setActionBarDescription(mCloseDrawerContentDescRes);
}
}
/**
* {@link DrawerLayout.DrawerListener} callback method. If you do not use your
* ActionBarDrawerToggle instance directly as your DrawerLayout's listener, you should call
* through to this method from your own listener object.
*
* @param drawerView Drawer view that is now closed
*/
@Override
public void onDrawerClosed(View drawerView) {
mSlider.setPosition(0);
if (mDrawerIndicatorEnabled) {
setActionBarDescription(mOpenDrawerContentDescRes);
}
}
/**
* {@link DrawerLayout.DrawerListener} callback method. If you do not use your
* ActionBarDrawerToggle instance directly as your DrawerLayout's listener, you should call
* through to this method from your own listener object.
*
* @param newState The new drawer motion state
*/
@Override
public void onDrawerStateChanged(int newState) {
}
/**
* Returns the fallback listener for Navigation icon click events.
*
* @return The click listener which receives Navigation click events from Toolbar when
* drawer indicator is disabled.
* @see #setToolbarNavigationClickListener(android.view.View.OnClickListener)
* @see #setDrawerIndicatorEnabled(boolean)
* @see #isDrawerIndicatorEnabled()
*/
public View.OnClickListener getToolbarNavigationClickListener() {
return mToolbarNavigationClickListener;
}
/**
* When DrawerToggle is constructed with a Toolbar, it sets the click listener on
* the Navigation icon. If you want to listen for clicks on the Navigation icon when
* DrawerToggle is disabled ({@link #setDrawerIndicatorEnabled(boolean)}, you should call this
* method with your listener and DrawerToggle will forward click events to that listener
* when drawer indicator is disabled.
*
* @see #setDrawerIndicatorEnabled(boolean)
*/
public void setToolbarNavigationClickListener(
View.OnClickListener onToolbarNavigationClickListener) {
mToolbarNavigationClickListener = onToolbarNavigationClickListener;
}
void setActionBarUpIndicator(Drawable upDrawable, int contentDescRes) {
if (!mWarnedForDisplayHomeAsUp && !mActivityImpl.isNavigationVisible()) {
Log.w("ActionBarDrawerToggle", "DrawerToggle may not show up because NavigationIcon"
+ " is not visible. You may need to call "
+ "actionbar.setDisplayHomeAsUpEnabled(true);");
mWarnedForDisplayHomeAsUp = true;
}
mActivityImpl.setActionBarUpIndicator(upDrawable, contentDescRes);
}
void setActionBarDescription(int contentDescRes) {
mActivityImpl.setActionBarDescription(contentDescRes);
}
Drawable getThemeUpIndicator() {
return mActivityImpl.getThemeUpIndicator();
}
static class DrawerArrowDrawableToggle extends DrawerArrowDrawable implements DrawerToggle {
private final Activity mActivity;
public DrawerArrowDrawableToggle(Activity activity, Context themedContext) {
super(themedContext);
mActivity = activity;
}
public void setPosition(float position) {
if (position == 1f) {
setVerticalMirror(true);
} else if (position == 0f) {
setVerticalMirror(false);
}
setProgress(position);
}
public float getPosition() {
return getProgress();
}
}
/**
* Interface for toggle drawables. Can be public in the future
*/
public interface DrawerToggle {
public void setPosition(float position);
public float getPosition();
}
/**
* Used when DrawerToggle is initialized with a Toolbar
*/
static class ToolbarCompatDelegate implements Delegate {
final Toolbar mToolbar;
final Drawable mDefaultUpIndicator;
final CharSequence mDefaultContentDescription;
ToolbarCompatDelegate(Toolbar toolbar) {
mToolbar = toolbar;
mDefaultUpIndicator = toolbar.getNavigationIcon();
mDefaultContentDescription = toolbar.getNavigationContentDescription();
}
@Override
public void setActionBarUpIndicator(Drawable upDrawable, @StringRes int contentDescRes) {
mToolbar.setNavigationIcon(upDrawable);
setActionBarDescription(contentDescRes);
}
@Override
public void setActionBarDescription(@StringRes int contentDescRes) {
if (contentDescRes == 0) {
mToolbar.setNavigationContentDescription(mDefaultContentDescription);
} else {
mToolbar.setNavigationContentDescription(contentDescRes);
}
}
@Override
public Drawable getThemeUpIndicator() {
return mDefaultUpIndicator;
}
@Override
public Context getActionBarThemedContext() {
return mToolbar.getContext();
}
@Override
public boolean isNavigationVisible() {
return true;
}
}
}
Таким образом, вы можете получить ссылку на DrawerToogle позвонив actionBarDrawerToggle.getSlider() и оживить состояние, позвонив drawerToogle.setPosition(some_float_between_0_and_1),
Для полного рабочего примера, проверьте мой репозиторий Github здесь
Если я правильно понимаю ваш вопрос: вы не можете. Анимация между hamburgermenu и стрелкой назад специфична для навигационной панели. При переключении действий вы не можете анимировать вещи на панели действий.