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Predictive back breakage fix #42789

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merged 6 commits into from
Jun 12, 2023
Merged

Predictive back breakage fix #42789

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0734cdf
Provide a default implementation to avoid needing to override setFram…
justinmc Jun 12, 2023
782eee5
Docs to explain the empty method
justinmc Jun 12, 2023
cb003af
Formatting
justinmc Jun 12, 2023
41b893d
frameworkHandlesBacks => frameworkHandlesBack
justinmc Jun 12, 2023
d701c98
Default implementation for source of error, too
justinmc Jun 12, 2023
ab5c5cd
Clarify docs
justinmc Jun 12, 2023
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6 changes: 3 additions & 3 deletions shell/platform/android/io/flutter/embedding/android/FlutterActivity.java
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Original file line number Diff line number Diff line change
Expand Up @@ -701,10 +701,10 @@ public void onBackInvoked() {
: null;

@Override
public void setFrameworkHandlesBack(boolean frameworkHandlesBacks) {
if (frameworkHandlesBacks && !hasRegisteredBackCallback) {
public void setFrameworkHandlesBack(boolean frameworkHandlesBack) {
if (frameworkHandlesBack && !hasRegisteredBackCallback) {
registerOnBackInvokedCallback();
} else if (!frameworkHandlesBacks && hasRegisteredBackCallback) {
} else if (!frameworkHandlesBack && hasRegisteredBackCallback) {
unregisterOnBackInvokedCallback();
}
}
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5 changes: 0 additions & 5 deletions shell/platform/android/io/flutter/embedding/android/FlutterFragment.java
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Expand Up @@ -1689,11 +1689,6 @@ boolean shouldDelayFirstAndroidViewDraw() {
return getArguments().getBoolean(ARG_SHOULD_DELAY_FIRST_ANDROID_VIEW_DRAW);
}

@Override
public void setFrameworkHandlesBack(boolean frameworkHandlesBacks) {
// Irrelevant to FlutterFragment.
}

private boolean stillAttachedForEvent(String event) {
if (delegate == null) {
Log.w(TAG, "FlutterFragment " + hashCode() + " " + event + " called after release.");
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14 changes: 10 additions & 4 deletions shell/platform/android/io/flutter/embedding/engine/systemchannels/PlatformChannel.java
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Expand Up @@ -138,8 +138,8 @@ public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result
break;
case "SystemNavigator.setFrameworkHandlesBack":
{
boolean frameworkHandlesBacks = (boolean) arguments;
platformMessageHandler.setFrameworkHandlesBack(frameworkHandlesBacks);
boolean frameworkHandlesBack = (boolean) arguments;
platformMessageHandler.setFrameworkHandlesBack(frameworkHandlesBack);
result.success(null);
break;
}
Expand Down Expand Up @@ -516,8 +516,14 @@ public interface PlatformMessageHandler {
*/
void setSystemUiOverlayStyle(@NonNull SystemChromeStyle systemUiOverlayStyle);

/** The Flutter application would or would not like to handle navigation pop events itself. */
void setFrameworkHandlesBack(boolean frameworkHandlesBack);
/**
* The Flutter application would or would not like to handle navigation pop events itself.
*
* <p>Relevant for registering and unregistering the app's OnBackInvokedCallback for the
* Predictive Back feature, for example as in {@link
* io.flutter.embedding.android.FlutterActivity}.
*/
default void setFrameworkHandlesBack(boolean frameworkHandlesBack) {}
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This makes sense to me since it is only used in a particular place. I'd suggest expanding the doc to mention where exactly this is relevant currently (FlutterActivity), just so it's clear we don't expect it to work or be used elsewhere.


/**
* The Flutter application would like to pop the top item off of the Android app's navigation
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17 changes: 12 additions & 5 deletions shell/platform/android/io/flutter/plugin/platform/PlatformPlugin.java
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Expand Up @@ -57,7 +57,14 @@ public interface PlatformPluginDelegate {
*/
boolean popSystemNavigator();

void setFrameworkHandlesBack(boolean frameworkHandlesBacks);
/**
* The Flutter application would or would not like to handle navigation pop events itself.
*
* <p>Relevant for registering and unregistering the app's OnBackInvokedCallback for the
* Predictive Back feature, for example as in {@link
* io.flutter.embedding.android.FlutterActivity}.
*/
default void setFrameworkHandlesBack(boolean frameworkHandlesBack) {}
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I think this works as a good alternative to the empty implementation in FlutterFragment. Maybe the doc can expand on where this is currently relevant (FlutterActivity alone now I suppose)?

}

@VisibleForTesting
Expand Down Expand Up @@ -112,8 +119,8 @@ public void setSystemUiOverlayStyle(
}

@Override
public void setFrameworkHandlesBack(boolean frameworkHandlesBacks) {
PlatformPlugin.this.setFrameworkHandlesBack(frameworkHandlesBacks);
public void setFrameworkHandlesBack(boolean frameworkHandlesBack) {
PlatformPlugin.this.setFrameworkHandlesBack(frameworkHandlesBack);
}

@Override
Expand Down Expand Up @@ -482,8 +489,8 @@ private void setSystemChromeSystemUIOverlayStyle(
currentTheme = systemChromeStyle;
}

private void setFrameworkHandlesBack(boolean frameworkHandlesBacks) {
platformPluginDelegate.setFrameworkHandlesBack(frameworkHandlesBacks);
private void setFrameworkHandlesBack(boolean frameworkHandlesBack) {
platformPluginDelegate.setFrameworkHandlesBack(frameworkHandlesBack);
}

private void popSystemNavigator() {
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2 changes: 1 addition & 1 deletion shell/platform/android/test/io/flutter/embedding/android/FlutterAndroidComponentTest.java
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Expand Up @@ -419,6 +419,6 @@ public boolean popSystemNavigator() {
}

@Override
public void setFrameworkHandlesBack(boolean frameworkHandlesBacks) {}
public void setFrameworkHandlesBack(boolean frameworkHandlesBack) {}
}
}