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[Android] Return keyboard pressed state
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77 changes: 77 additions & 0 deletions
77
shell/platform/android/io/flutter/embedding/engine/systemchannels/KeyboardChannel.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| // Copyright 2013 The Flutter Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style license that can be | ||
| // found in the LICENSE file. | ||
|
|
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| package io.flutter.embedding.engine.systemchannels; | ||
|
|
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| import androidx.annotation.NonNull; | ||
| import androidx.annotation.Nullable; | ||
| import io.flutter.Log; | ||
| import io.flutter.embedding.engine.dart.DartExecutor; | ||
| import io.flutter.plugin.common.MethodCall; | ||
| import io.flutter.plugin.common.MethodChannel; | ||
| import io.flutter.plugin.common.StandardMethodCodec; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
|
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| /** | ||
| * Event message channel for keyboard events to/from the Flutter framework. | ||
| * | ||
| * <p>Receives asynchronous messages from the framework to query the engine known pressed state. | ||
| */ | ||
| public class KeyboardChannel { | ||
| private static final String TAG = "KeyboardChannel"; | ||
|
|
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| public final MethodChannel channel; | ||
| private KeyboardMethodHandler keyboardMethodHandler; | ||
|
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| @NonNull | ||
| public final MethodChannel.MethodCallHandler parsingMethodHandler = | ||
| new MethodChannel.MethodCallHandler() { | ||
| @Override | ||
| public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result result) { | ||
| if (keyboardMethodHandler == null) { | ||
| Log.v(TAG, "No KeyboardMethodHandler registered, call not forwarded to keyboard API."); | ||
| return; | ||
| } | ||
| String method = call.method; | ||
| Log.v(TAG, "Received '" + method + "' message."); | ||
| switch (method) { | ||
| case "getKeyboardState": | ||
| Map<Long, Long> pressedState = new HashMap<>(); | ||
| try { | ||
| pressedState = keyboardMethodHandler.getKeyboardState(); | ||
| } catch (IllegalStateException exception) { | ||
| result.error("error", exception.getMessage(), null); | ||
| } | ||
| result.success(pressedState); | ||
| break; | ||
| default: | ||
| result.notImplemented(); | ||
| break; | ||
| } | ||
| } | ||
| }; | ||
|
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| public KeyboardChannel(@NonNull DartExecutor dartExecutor) { | ||
| channel = new MethodChannel(dartExecutor, "flutter/keyboard", StandardMethodCodec.INSTANCE); | ||
| channel.setMethodCallHandler(parsingMethodHandler); | ||
| } | ||
|
|
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| /** | ||
| * Sets the {@link KeyboardMethodHandler} which receives all requests to query the keyboard state. | ||
| */ | ||
| public void setKeyboardMethodHandler(@Nullable KeyboardMethodHandler keyboardMethodHandler) { | ||
| this.keyboardMethodHandler = keyboardMethodHandler; | ||
| } | ||
|
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| public interface KeyboardMethodHandler { | ||
| /** | ||
| * Returns the keyboard pressed states. | ||
| * | ||
| * @return A map which keys are physical keyboard key ID and values the corresponding logical | ||
| * keyboard key ID. | ||
| */ | ||
| Map<Long, Long> getKeyboardState(); | ||
| } | ||
| } |
57 changes: 57 additions & 0 deletions
57
shell/platform/android/io/flutter/plugin/keyboard/KeyboardPlugin.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| // Copyright 2013 The Flutter Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style license that can be | ||
| // found in the LICENSE file. | ||
|
|
||
| package io.flutter.plugin.keyboard; | ||
|
|
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| import androidx.annotation.NonNull; | ||
| import androidx.annotation.VisibleForTesting; | ||
| import io.flutter.embedding.android.KeyboardManager; | ||
| import io.flutter.embedding.engine.systemchannels.KeyboardChannel; | ||
| import io.flutter.plugin.common.MethodChannel; | ||
| import java.util.Map; | ||
|
|
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| /** | ||
| * {@link KeyboardPlugin} is the implementation of all functionalities needed for querying keyboard | ||
| * pressed state. | ||
| * | ||
| * <p>The plugin handles requests for querying keyboard pressed states by the {@link | ||
| * io.flutter.embedding.engine.systemchannels.KeyboardChannel} via returning the {@link | ||
| * io.flutter.embedding.android.KeyEmbedderResponder} pressed keys. | ||
| */ | ||
| public class KeyboardPlugin implements KeyboardChannel.KeyboardMethodHandler { | ||
|
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| private final KeyboardChannel mKeyboardChannel; | ||
| private final KeyboardManager mKeyboardManager; | ||
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| @VisibleForTesting MethodChannel.Result pendingResult; | ||
|
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| public KeyboardPlugin( | ||
| @NonNull KeyboardManager keyboardManager, @NonNull KeyboardChannel keyboardChannel) { | ||
| mKeyboardManager = keyboardManager; | ||
| mKeyboardChannel = keyboardChannel; | ||
|
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| mKeyboardChannel.setKeyboardMethodHandler(this); | ||
| } | ||
|
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| /** | ||
| * Unregisters this {@code KeyboardPlugin} as the {@code KeyboardChannel.KeyboardMethodHandler}, | ||
| * for the {@link io.flutter.embedding.engine.systemchannels.KeyboardChannel}. | ||
| * | ||
| * <p>Do not invoke any methods on a {@code KeyboardPlugin} after invoking this method. | ||
| */ | ||
| public void destroy() { | ||
| mKeyboardChannel.setKeyboardMethodHandler(null); | ||
| } | ||
|
|
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| /** | ||
| * Returns the keyboard pressed state. | ||
| * | ||
| * @return A map which keys are physical keyboard key ID and values the corresponding logical | ||
| * keyboard key ID. | ||
| */ | ||
| @Override | ||
| public Map<Long, Long> getKeyboardState() { | ||
| return mKeyboardManager.getPressedState(); | ||
| } | ||
| } |
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