Android: add support for TextInputType.none (flutter#26585)

Author: jpnurmi

shell/platform/android/io/flutter/embedding/engine/systemchannels/TextInputChannel.java

@@ -640,7 +640,8 @@ public enum TextInputType {
     MULTILINE("TextInputType.multiline"),
     EMAIL_ADDRESS("TextInputType.emailAddress"),
     URL("TextInputType.url"),
-    VISIBLE_PASSWORD("TextInputType.visiblePassword");
+    VISIBLE_PASSWORD("TextInputType.visiblePassword"),
+    NONE("TextInputType.none");
 
     static TextInputType fromValue(@NonNull String encodedName) throws NoSuchFieldException {
       for (TextInputType textInputType : TextInputType.values()) {

shell/platform/android/io/flutter/plugin/editing/TextInputPlugin.java

@@ -244,6 +244,8 @@ private static int inputTypeFromTextInputType(
       return textType;
     } else if (type.type == TextInputChannel.TextInputType.PHONE) {
       return InputType.TYPE_CLASS_PHONE;
+    } else if (type.type == TextInputChannel.TextInputType.NONE) {
+      return InputType.TYPE_NULL;
     }
 
     int textType = InputType.TYPE_CLASS_TEXT;
@@ -365,9 +367,21 @@ public void sendTextInputAppPrivateCommand(String action, Bundle data) {
     mImm.sendAppPrivateCommand(mView, action, data);
   }
 
-  private void showTextInput(View view) {
-    view.requestFocus();
-    mImm.showSoftInput(view, 0);
+  private boolean canShowTextInput() {
+    if (configuration == null || configuration.inputType == null) {
+      return true;
+    }
+    return configuration.inputType.type != TextInputChannel.TextInputType.NONE;
+  }
+
+  @VisibleForTesting
+  void showTextInput(View view) {
+    if (canShowTextInput()) {
+      view.requestFocus();
+      mImm.showSoftInput(view, 0);
+    } else {
+      hideTextInput(view);
+    }
   }
 
   private void hideTextInput(View view) {
@@ -385,15 +399,19 @@ private void hideTextInput(View view) {
   void setTextInputClient(int client, TextInputChannel.Configuration configuration) {
     // Call notifyViewExited on the previous field.
     notifyViewExited();
-    inputTarget = new InputTarget(InputTarget.Type.FRAMEWORK_CLIENT, client);
+    this.configuration = configuration;
+    if (canShowTextInput()) {
+      inputTarget = new InputTarget(InputTarget.Type.FRAMEWORK_CLIENT, client);
+    } else {
+      inputTarget = new InputTarget(InputTarget.Type.NO_TARGET, client);
+    }
 
     if (mEditable != null) {
       mEditable.removeEditingStateListener(this);
     }
     mEditable =
         new ListenableEditingState(
             configuration.autofill != null ? configuration.autofill.editState : null, mView);
-    this.configuration = configuration;
     updateAutofillConfigurationIfNeeded(configuration);
 
     // setTextInputClient will be followed by a call to setTextInputEditingState.

shell/platform/android/test/io/flutter/plugin/editing/TextInputPluginTest.java

@@ -604,6 +604,59 @@ public void inputConnection_finishComposingTextUpdatesIMM() throws JSONException
     assertEquals(0, testImm.getLastCursorAnchorInfo().getComposingText().length());
   }
 
+  @Test
+  public void inputConnection_textInputTypeNone() {
+    View testView = new View(RuntimeEnvironment.application);
+    DartExecutor dartExecutor = mock(DartExecutor.class);
+    TextInputChannel textInputChannel = new TextInputChannel(dartExecutor);
+    TextInputPlugin textInputPlugin =
+        new TextInputPlugin(testView, textInputChannel, mock(PlatformViewsController.class));
+    textInputPlugin.setTextInputClient(
+        0,
+        new TextInputChannel.Configuration(
+            false,
+            false,
+            true,
+            TextInputChannel.TextCapitalization.NONE,
+            new TextInputChannel.InputType(TextInputChannel.TextInputType.NONE, false, false),
+            null,
+            null,
+            null,
+            null));
+
+    InputConnection connection =
+        textInputPlugin.createInputConnection(
+            testView, mock(KeyboardManager.class), new EditorInfo());
+    assertEquals(connection, null);
+  }
+
+  @Test
+  public void showTextInput_textInputTypeNone() {
+    TestImm testImm =
+        Shadow.extract(
+            RuntimeEnvironment.application.getSystemService(Context.INPUT_METHOD_SERVICE));
+    View testView = new View(RuntimeEnvironment.application);
+    DartExecutor dartExecutor = mock(DartExecutor.class);
+    TextInputChannel textInputChannel = new TextInputChannel(dartExecutor);
+    TextInputPlugin textInputPlugin =
+        new TextInputPlugin(testView, textInputChannel, mock(PlatformViewsController.class));
+    textInputPlugin.setTextInputClient(
+        0,
+        new TextInputChannel.Configuration(
+            false,
+            false,
+            true,
+            TextInputChannel.TextCapitalization.NONE,
+            new TextInputChannel.InputType(TextInputChannel.TextInputType.NONE, false, false),
+            null,
+            null,
+            null,
+            null));
+
+    textInputPlugin.showTextInput(testView);
+    assertEquals(testImm.isSoftInputVisible(), false);
+  }
+
   // -------- Start: Autofill Tests -------
   @Test
   public void autofill_onProvideVirtualViewStructure() {