Support predictive back from all apps to home
bug: b/238475505
Test: manual
Change-Id: Ibf4f7f41a26b044a538e2cd566d2297ed88f1b99
diff --git a/src/com/android/launcher3/BaseActivity.java b/src/com/android/launcher3/BaseActivity.java
index 61707df..e71391f 100644
--- a/src/com/android/launcher3/BaseActivity.java
+++ b/src/com/android/launcher3/BaseActivity.java
@@ -176,14 +176,7 @@
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
- if (Utilities.ATLEAST_T) {
- getOnBackInvokedDispatcher().registerOnBackInvokedCallback(
- OnBackInvokedDispatcher.PRIORITY_DEFAULT,
- () -> {
- onBackPressed();
- TestLogging.recordEvent(TestProtocol.SEQUENCE_MAIN, "onBackInvoked");
- });
- }
+ registerBackDispatcher();
}
@Override
@@ -246,6 +239,17 @@
}
+ protected void registerBackDispatcher() {
+ if (Utilities.ATLEAST_T) {
+ getOnBackInvokedDispatcher().registerOnBackInvokedCallback(
+ OnBackInvokedDispatcher.PRIORITY_DEFAULT,
+ () -> {
+ onBackPressed();
+ TestLogging.recordEvent(TestProtocol.SEQUENCE_MAIN, "onBackInvoked");
+ });
+ }
+ }
+
public boolean isStarted() {
return (mActivityFlags & ACTIVITY_STATE_STARTED) != 0;
}
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 43772e4..1563130 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -120,6 +120,7 @@
import android.widget.Toast;
import androidx.annotation.CallSuper;
+import androidx.annotation.FloatRange;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.StringRes;
@@ -2065,6 +2066,14 @@
mStateManager.getState().onBackPressed(this);
}
+ protected void onBackProgressed(@FloatRange(from = 0.0, to = 1.0) float backProgress) {
+ mStateManager.getState().onBackProgressed(this, backProgress);
+ }
+
+ protected void onBackCancelled() {
+ mStateManager.getState().onBackCancelled(this);
+ }
+
protected void onScreenOff() {
// Reset AllApps to its initial state only if we are not in the middle of
// processing a multi-step drop
diff --git a/src/com/android/launcher3/LauncherState.java b/src/com/android/launcher3/LauncherState.java
index 5dddc6f..b9e4c17 100644
--- a/src/com/android/launcher3/LauncherState.java
+++ b/src/com/android/launcher3/LauncherState.java
@@ -34,6 +34,8 @@
import android.graphics.Color;
import android.view.animation.Interpolator;
+import androidx.annotation.FloatRange;
+
import com.android.launcher3.statemanager.BaseState;
import com.android.launcher3.statemanager.StateManager;
import com.android.launcher3.states.HintState;
@@ -342,6 +344,27 @@
}
}
+ /**
+ * Find {@link StateManager} and target {@link LauncherState} to handle back progress in
+ * predictive back gesture.
+ */
+ public void onBackProgressed(
+ Launcher launcher, @FloatRange(from = 0.0, to = 1.0) float backProgress) {
+ StateManager<LauncherState> lsm = launcher.getStateManager();
+ LauncherState toState = lsm.getLastState();
+ lsm.onBackProgressed(toState, backProgress);
+ }
+
+ /**
+ * Find {@link StateManager} and target {@link LauncherState} to handle backProgress in
+ * predictive back gesture.
+ */
+ public void onBackCancelled(Launcher launcher) {
+ StateManager<LauncherState> lsm = launcher.getStateManager();
+ LauncherState toState = lsm.getLastState();
+ lsm.onBackCancelled(toState);
+ }
+
public static abstract class PageAlphaProvider {
public final Interpolator interpolator;
diff --git a/src/com/android/launcher3/allapps/AllAppsTransitionController.java b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
index 9930abe..24bfedb 100644
--- a/src/com/android/launcher3/allapps/AllAppsTransitionController.java
+++ b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
@@ -15,6 +15,7 @@
*/
package com.android.launcher3.allapps;
+import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
import static com.android.launcher3.LauncherAnimUtils.VIEW_TRANSLATE_Y;
import static com.android.launcher3.LauncherState.ALL_APPS;
import static com.android.launcher3.LauncherState.ALL_APPS_CONTENT;
@@ -33,11 +34,15 @@
import android.view.View;
import android.view.animation.Interpolator;
+import androidx.annotation.FloatRange;
+
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.DeviceProfile.OnDeviceProfileChangeListener;
import com.android.launcher3.Launcher;
import com.android.launcher3.LauncherState;
+import com.android.launcher3.anim.AnimatedFloat;
import com.android.launcher3.anim.AnimatorListeners;
+import com.android.launcher3.anim.Interpolators;
import com.android.launcher3.anim.PendingAnimation;
import com.android.launcher3.anim.PropertySetter;
import com.android.launcher3.statemanager.StateManager.StateHandler;
@@ -61,6 +66,8 @@
implements StateHandler<LauncherState>, OnDeviceProfileChangeListener {
// This constant should match the second derivative of the animator interpolator.
public static final float INTERP_COEFF = 1.7f;
+ private static final float SWIPE_ALL_APPS_TO_HOME_MIN_SCALE = 0.9f;
+ private static final int REVERT_SWIPE_ALL_APPS_TO_HOME_ANIMATION_DURATION_MS = 200;
public static final FloatProperty<AllAppsTransitionController> ALL_APPS_PROGRESS =
new FloatProperty<AllAppsTransitionController>("allAppsProgress") {
@@ -139,6 +146,7 @@
private ActivityAllAppsContainerView<Launcher> mAppsView;
private final Launcher mLauncher;
+ private final AnimatedFloat mAllAppScale = new AnimatedFloat(this::onScaleProgressChanged);
private boolean mIsVerticalLayout;
// Whether this class should take care of closing the keyboard.
@@ -232,6 +240,52 @@
onProgressAnimationEnd();
}
+ @Override
+ public void onBackProgressed(
+ LauncherState toState, @FloatRange(from = 0.0, to = 1.0) float backProgress) {
+ if (!mLauncher.isInState(ALL_APPS) || !NORMAL.equals(toState)) {
+ return;
+ }
+
+ float deceleratedProgress =
+ Interpolators.PREDICTIVE_BACK_DECELERATED_EASE.getInterpolation(backProgress);
+ float scaleProgress = SWIPE_ALL_APPS_TO_HOME_MIN_SCALE
+ + (1 - SWIPE_ALL_APPS_TO_HOME_MIN_SCALE) * (1 - deceleratedProgress);
+
+ mAllAppScale.updateValue(scaleProgress);
+ }
+
+ @Override
+ public void onBackCancelled(LauncherState toState) {
+ if (!mLauncher.isInState(ALL_APPS) || !NORMAL.equals(toState)) {
+ return;
+ }
+
+ // TODO: once ag/20649618 is picked into tm-qpr, we don't need to animate back on cancel
+ // swipe because framework will do that for us in {@link #onBackProgressed}.
+ animateAllAppsToNoScale();
+ }
+
+ private void onScaleProgressChanged() {
+ final float scaleProgress = mAllAppScale.value;
+ SCALE_PROPERTY.set(mLauncher.getAppsView(), scaleProgress);
+ mLauncher.getScrimView().setScrimHeaderScale(scaleProgress);
+
+ AllAppsRecyclerView rv = mLauncher.getAppsView().getActiveRecyclerView();
+ if (rv != null && rv.getScrollbar() != null) {
+ rv.getScrollbar().setVisibility(scaleProgress < 1f ? View.INVISIBLE : View.VISIBLE);
+ }
+
+ // TODO(b/264906511): We need to disable view clipping on all apps' parent views so
+ // that the extra roll of app icons are displayed.
+ }
+
+ private void animateAllAppsToNoScale() {
+ mAllAppScale.animateToValue(1f)
+ .setDuration(REVERT_SWIPE_ALL_APPS_TO_HOME_ANIMATION_DURATION_MS)
+ .start();
+ }
+
/**
* Creates an animation which updates the vertical transition progress and updates all the
* dependent UI using various animation events
@@ -258,6 +312,8 @@
if (config.userControlled && success && mShouldControlKeyboard) {
mLauncher.getAppsView().getSearchUiManager().getEditText().hideKeyboard();
}
+
+ mAllAppScale.updateValue(1f);
});
}
diff --git a/src/com/android/launcher3/allapps/BaseAllAppsContainerView.java b/src/com/android/launcher3/allapps/BaseAllAppsContainerView.java
index 00e89ba..4878077 100644
--- a/src/com/android/launcher3/allapps/BaseAllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/BaseAllAppsContainerView.java
@@ -808,7 +808,7 @@
}
@Override
- public void drawOnScrim(Canvas canvas) {
+ public void drawOnScrimWithScale(Canvas canvas, float scale) {
boolean isTablet = mActivityContext.getDeviceProfile().isTablet;
// Draw full background panel for tablets.
@@ -833,7 +833,9 @@
if (mHeaderPaint.getColor() == mScrimColor || mHeaderPaint.getColor() == 0) {
return;
}
- int bottom = getHeaderBottom() + getVisibleContainerView().getPaddingTop();
+ final float offset = (getVisibleContainerView().getHeight() * (1 - scale) / 2);
+ final float bottom =
+ scale * (getHeaderBottom() + getVisibleContainerView().getPaddingTop()) + offset;
FloatingHeaderView headerView = getFloatingHeaderView();
if (isTablet) {
// Start adding header protection if search bar or tabs will attach to the top.
diff --git a/src/com/android/launcher3/anim/Interpolators.java b/src/com/android/launcher3/anim/Interpolators.java
index b55a1e4..e886543 100644
--- a/src/com/android/launcher3/anim/Interpolators.java
+++ b/src/com/android/launcher3/anim/Interpolators.java
@@ -56,6 +56,8 @@
public static final Interpolator DECELERATED_EASE = new PathInterpolator(0, 0, .2f, 1f);
public static final Interpolator ACCELERATED_EASE = new PathInterpolator(0.4f, 0, 1f, 1f);
+ public static final Interpolator PREDICTIVE_BACK_DECELERATED_EASE =
+ new PathInterpolator(0, 0, 0, 1f);
/**
* The default emphasized interpolator. Used for hero / emphasized movement of content.
diff --git a/src/com/android/launcher3/statemanager/StateManager.java b/src/com/android/launcher3/statemanager/StateManager.java
index ad1e7f0..34ac8c2 100644
--- a/src/com/android/launcher3/statemanager/StateManager.java
+++ b/src/com/android/launcher3/statemanager/StateManager.java
@@ -28,6 +28,8 @@
import android.os.Handler;
import android.os.Looper;
+import androidx.annotation.FloatRange;
+
import com.android.launcher3.anim.AnimationSuccessListener;
import com.android.launcher3.anim.AnimatorPlaybackController;
import com.android.launcher3.anim.PendingAnimation;
@@ -195,6 +197,21 @@
}
}
+ /** Handles backProgress in predictive back gesture by passing it to state handlers. */
+ public void onBackProgressed(
+ STATE_TYPE toState, @FloatRange(from = 0.0, to = 1.0) float backProgress) {
+ for (StateHandler handler : getStateHandlers()) {
+ handler.onBackProgressed(toState, backProgress);
+ }
+ }
+
+ /** Handles back cancelled event in predictive back gesture by passing it to state handlers. */
+ public void onBackCancelled(STATE_TYPE toState) {
+ for (StateHandler handler : getStateHandlers()) {
+ handler.onBackCancelled(toState);
+ }
+ }
+
private void goToState(
STATE_TYPE state, boolean animated, long delay, AnimatorListener listener) {
animated &= areAnimatorsEnabled();
@@ -586,6 +603,13 @@
*/
void setStateWithAnimation(
STATE_TYPE toState, StateAnimationConfig config, PendingAnimation animation);
+
+ /** Handles backProgress in predictive back gesture for target state. */
+ default void onBackProgressed(
+ STATE_TYPE toState, @FloatRange(from = 0.0, to = 1.0) float backProgress) {};
+
+ /** Handles back cancelled event in predictive back gesture for target state. */
+ default void onBackCancelled(STATE_TYPE toState) {};
}
public interface StateListener<STATE_TYPE> {
diff --git a/src/com/android/launcher3/views/ScrimView.java b/src/com/android/launcher3/views/ScrimView.java
index 4c0bfde..870ff12 100644
--- a/src/com/android/launcher3/views/ScrimView.java
+++ b/src/com/android/launcher3/views/ScrimView.java
@@ -46,6 +46,7 @@
private int mBackgroundColor;
private boolean mIsVisible = true;
private boolean mLastDispatchedOpaqueness;
+ private float mHeaderScale = 1f;
public ScrimView(Context context, AttributeSet attrs) {
super(context, attrs);
@@ -91,7 +92,16 @@
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mDrawingController != null) {
- mDrawingController.drawOnScrim(canvas);
+ mDrawingController.drawOnScrimWithScale(canvas, mHeaderScale);
+ }
+ }
+
+ /** Set scrim header's scale and bottom offset. */
+ public void setScrimHeaderScale(float scale) {
+ boolean hasChanged = mHeaderScale != scale;
+ mHeaderScale = scale;
+ if (hasChanged) {
+ invalidate();
}
}
@@ -176,6 +186,6 @@
/**
* Called inside ScrimView#OnDraw
*/
- void drawOnScrim(Canvas canvas);
+ void drawOnScrimWithScale(Canvas canvas, float scale);
}
}