修复输入框的bug

android/src/main/java/com/idlefish/flutterboost/XAndroidKeyProcessor.java

+package com.idlefish.flutterboost;
+
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.view.KeyCharacterMap;
+import android.view.KeyEvent;
+
+import io.flutter.embedding.engine.systemchannels.KeyEventChannel;
+import io.flutter.plugin.editing.TextInputPlugin;
+
+public class XAndroidKeyProcessor {
+    @NonNull
+    private final KeyEventChannel keyEventChannel;
+    @NonNull
+    private final XTextInputPlugin textInputPlugin;
+
+    private int combiningCharacter;
+
+    public XAndroidKeyProcessor(@NonNull KeyEventChannel keyEventChannel, @NonNull XTextInputPlugin textInputPlugin) {
+        this.keyEventChannel = keyEventChannel;
+        this.textInputPlugin = textInputPlugin;
+    }
+
+
+    public void onKeyUp(@NonNull KeyEvent keyEvent) {
+        Character complexCharacter = applyCombiningCharacterToBaseCharacter(keyEvent.getUnicodeChar());
+        keyEventChannel.keyUp(
+                new KeyEventChannel.FlutterKeyEvent(keyEvent, complexCharacter)
+        );
+    }
+
+    public void onKeyDown(@NonNull KeyEvent keyEvent) {
+        if (textInputPlugin.getLastInputConnection() != null
+                && textInputPlugin.getInputMethodManager().isAcceptingText()) {
+            textInputPlugin.getLastInputConnection().sendKeyEvent(keyEvent);
+        }
+
+        Character complexCharacter = applyCombiningCharacterToBaseCharacter(keyEvent.getUnicodeChar());
+        keyEventChannel.keyDown(
+                new KeyEventChannel.FlutterKeyEvent(keyEvent, complexCharacter)
+        );
+    }
+
+    /**
+     * Applies the given Unicode character in {@code newCharacterCodePoint} to a previously
+     * entered Unicode combining character and returns the combination of these characters
+     * if a combination exists.
+     * <p>
+     * This method mutates {@link #combiningCharacter} over time to combine characters.
+     * <p>
+     * One of the following things happens in this method:
+     * <ul>
+     *   <li>If no previous {@link #combiningCharacter} exists and the {@code newCharacterCodePoint}
+     *   is not a combining character, then {@code newCharacterCodePoint} is returned.</li>
+     *   <li>If no previous {@link #combiningCharacter} exists and the {@code newCharacterCodePoint}
+     *   is a combining character, then {@code newCharacterCodePoint} is saved as the
+     *   {@link #combiningCharacter} and null is returned.</li>
+     *   <li>If a previous {@link #combiningCharacter} exists and the {@code newCharacterCodePoint}
+     *   is also a combining character, then the {@code newCharacterCodePoint} is combined with
+     *   the existing {@link #combiningCharacter} and null is returned.</li>
+     *   <li>If a previous {@link #combiningCharacter} exists and the {@code newCharacterCodePoint}
+     *    is not a combining character, then the {@link #combiningCharacter} is applied to the
+     *    regular {@code newCharacterCodePoint} and the resulting complex character is returned. The
+     *    {@link #combiningCharacter} is cleared.</li>
+     * </ul>
+     * <p>
+     * The following reference explains the concept of a "combining character":
+     * https://en.wikipedia.org/wiki/Combining_character
+     */
+    @Nullable
+    private Character applyCombiningCharacterToBaseCharacter(int newCharacterCodePoint) {
+        if (newCharacterCodePoint == 0) {
+            return null;
+        }
+
+        Character complexCharacter = (char) newCharacterCodePoint;
+        boolean isNewCodePointACombiningCharacter = (newCharacterCodePoint & KeyCharacterMap.COMBINING_ACCENT) != 0;
+        if (isNewCodePointACombiningCharacter) {
+            // If a combining character was entered before, combine this one with that one.
+            int plainCodePoint = newCharacterCodePoint & KeyCharacterMap.COMBINING_ACCENT_MASK;
+            if (combiningCharacter != 0) {
+                combiningCharacter = KeyCharacterMap.getDeadChar(combiningCharacter, plainCodePoint);
+            } else {
+                combiningCharacter = plainCodePoint;
+            }
+        } else {
+            // The new character is a regular character. Apply combiningCharacter to it, if it exists.
+            if (combiningCharacter != 0) {
+                int combinedChar = KeyCharacterMap.getDeadChar(combiningCharacter, newCharacterCodePoint);
+                if (combinedChar > 0) {
+                    complexCharacter = (char) combinedChar;
+                }
+                combiningCharacter = 0;
+            }
+        }
+
+        return complexCharacter;
+    }
+}
\ No newline at end of file

android/src/main/java/com/idlefish/flutterboost/XFlutterView.java

@@ -90,9 +90,9 @@ public class XFlutterView extends FrameLayout {
   // These components essentially add some additional behavioral logic on top of
   // existing, stateless system channels, e.g., KeyEventChannel, TextInputChannel, etc.
   @Nullable
-  private TextInputPlugin textInputPlugin;
+  private XTextInputPlugin textInputPlugin;
   @Nullable
-  private AndroidKeyProcessor androidKeyProcessor;
+  private XAndroidKeyProcessor androidKeyProcessor;
   @Nullable
   private AndroidTouchProcessor androidTouchProcessor;
   @Nullable
@@ -585,7 +585,7 @@ public class XFlutterView extends FrameLayout {
               + " to new engine.");
       detachFromFlutterEngine();
     }
-
+    this.requestFocus();
     this.flutterEngine = flutterEngine;
 
     // Instruct our FlutterRenderer that we are now its designated RenderSurface.
@@ -599,16 +599,21 @@ public class XFlutterView extends FrameLayout {
 
     // Initialize various components that know how to process Android View I/O
     // in a way that Flutter understands.
-    if(this.textInputPlugin!=null){
-      this.textInputPlugin.destroy();
-      resolveMemoryLeaks();
 
+
+    if(textInputPlugin==null){
+      textInputPlugin = new XTextInputPlugin(
+              this,
+              flutterEngine.getTextInputChannel(),
+              this.flutterEngine.getPlatformViewsController()
+      );
     }
 
-    this.textInputPlugin = new TextInputPlugin(this, this.flutterEngine.getDartExecutor(), this.flutterEngine.getPlatformViewsController());
+    textInputPlugin.setTextInputMethodHandler();
+    textInputPlugin.getInputMethodManager().restartInput(this);
 
 
-    this.androidKeyProcessor = new AndroidKeyProcessor(
+    this.androidKeyProcessor = new XAndroidKeyProcessor(
             this.flutterEngine.getKeyEventChannel(),
             textInputPlugin
     );
@@ -687,9 +692,8 @@ public class XFlutterView extends FrameLayout {
     // now that the engine is detached. The new InputConnection will be null, which
     // signifies that this View does not process input (until a new engine is attached).
     // TODO(mattcarroll): once this is proven to work, move this line ot TextInputPlugin
-    textInputPlugin.getInputMethodManager().restartInput(this);
-    textInputPlugin.destroy();
-    resolveMemoryLeaks();
+
+//    resolveMemoryLeaks();
     // Instruct our FlutterRenderer that we are no longer interested in being its RenderSurface.
     FlutterRenderer flutterRenderer = flutterEngine.getRenderer();
 //    didRenderFirstFrame = false;
@@ -697,7 +701,9 @@ public class XFlutterView extends FrameLayout {
     flutterRenderer.detachFromRenderSurface();
     flutterEngine = null;
   }
-
+  public void release(){
+    textInputPlugin.release();
+  }
 
   public void resolveMemoryLeaks(){
     try {

android/src/main/java/com/idlefish/flutterboost/containers/FlutterActivityAndFragmentDelegate.java

@@ -226,6 +226,7 @@ public class FlutterActivityAndFragmentDelegate  implements IFlutterViewContaine
             flutterEngine.getActivityControlSurface().detachFromActivityForConfigChanges();
 
         }
+        flutterView.release();
     }
 
 

android/src/main/java/com/idlefish/flutterboost/containers/FlutterSplashView.java

@@ -54,7 +54,7 @@ public class FlutterSplashView extends FrameLayout {
         public void onFlutterEngineDetachedFromFlutterView() {
         }
     };
-    int i=0;
+
     @NonNull
     private final OnFirstFrameRenderedListener onFirstFrameRenderedListener = new OnFirstFrameRenderedListener() {
         @Override
@@ -291,6 +291,9 @@ public class FlutterSplashView extends FrameLayout {
         }
     }
 
+
+
+
     public void onAttach() {
         Debuger.log("BoostFlutterView onAttach");