Android Input Failed When TextInputType Is Phone, Number

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

@@ -287,6 +287,8 @@ public boolean handleKeyEvent(KeyEvent event) {
         return handleVerticalMovement(false, event.isShiftPressed());
         // When the enter key is pressed on a non-multiline field, consider it a
         // submit instead of a newline.
+      } else if (event.getKeyCode() == KeyEvent.KEYCODE_DEL) {
+        return handleDelete();
       } else if ((event.getKeyCode() == KeyEvent.KEYCODE_ENTER
               || event.getKeyCode() == KeyEvent.KEYCODE_NUMPAD_ENTER)
           && (InputType.TYPE_TEXT_FLAG_MULTI_LINE & mEditorInfo.inputType) == 0) {
@@ -297,12 +299,12 @@ public boolean handleKeyEvent(KeyEvent event) {
         final int selStart = Selection.getSelectionStart(mEditable);
         final int selEnd = Selection.getSelectionEnd(mEditable);
         final int character = event.getUnicodeChar();
-        if (selStart < 0 || selEnd < 0 || character == 0) {
+        if (character == 0) {
           return false;
         }
 
-        final int selMin = Math.min(selStart, selEnd);
-        final int selMax = Math.max(selStart, selEnd);
+        final int selMin = Math.max(Math.min(selStart, selEnd), 0);
+        final int selMax = Math.max(Math.max(selStart, selEnd), 0);
         beginBatchEdit();
         if (selMin != selMax) mEditable.delete(selMin, selMax);
         mEditable.insert(selMin, String.valueOf((char) character));
@@ -375,6 +377,20 @@ private boolean handleVerticalMovement(boolean isUp, boolean isShiftPressed) {
     return true;
   }
 
+  private boolean handleDelete() {
+    final int selStart = Selection.getSelectionStart(mEditable);
+    final int selEnd = Selection.getSelectionEnd(mEditable);
+
+    if (selStart <= 0 || selEnd <= 0) {
+      return false;
+    }
+    beginBatchEdit();
+    mEditable.delete(selStart - 1, selEnd);
+    setSelection(selStart - 1, selEnd - 1);
+    endBatchEdit();
+    return true;
+  }
+
   @Override
   public boolean performContextMenuAction(int id) {
     beginBatchEdit();

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

@@ -43,6 +43,8 @@
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.util.FakeKeyEvent;
 import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.junit.Before;
@@ -1104,16 +1106,25 @@ public void testSendKeyEvent_sendHardwareKeyEvents() {
 
   @Test
   public void testSendKeyEvent_delKeyNotConsumed() {
-    ListenableEditingState editable = sampleEditable(5, 5);
+    ListenableEditingState editable = sampleEditable(5, 5, "01234");
     InputConnectionAdaptor adaptor = sampleInputConnectionAdaptor(editable);
 
-    KeyEvent downKeyDown = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL);
+    KeyEvent downKeyUP = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_DEL);
 
     for (int i = 0; i < 4; i++) {
-      boolean didConsume = adaptor.handleKeyEvent(downKeyDown);
+      boolean didConsume = adaptor.handleKeyEvent(downKeyUP);
       assertFalse(didConsume);
     }
     assertEquals(5, Selection.getSelectionStart(editable));
+
+    // delete character
+    KeyEvent downKeyDown = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL);
+    for (int i = 0; i < 5; i++) {
+      boolean didConsume = adaptor.handleKeyEvent(downKeyDown);
+      assertTrue(didConsume);
+    }
+    assertEquals(0, Selection.getSelectionStart(editable));
+    assertEquals("", editable.toString());
   }
 
   @Test
@@ -1127,6 +1138,22 @@ public void testDoesNotConsumeBackButton() {
     assertFalse(didConsume);
   }
 
+  @Test
+  public void testInputKeycode() {
+    ListenableEditingState editable = sampleEditable(0, 0, "");
+    InputConnectionAdaptor adaptor = sampleInputConnectionAdaptor(editable);
+
+    List<FakeKeyEvent> keyEvents = new ArrayList<>();
+    keyEvents.add(new FakeKeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_1));
+    keyEvents.add(new FakeKeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_2));
+    keyEvents.add(new FakeKeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_3));
+
+    for (FakeKeyEvent keyEvent : keyEvents) {
+      adaptor.handleKeyEvent(keyEvent);
+    }
+    assertEquals("123", editable.toString());
+  }
+
   @Test
   public void testCleanUpBatchEndsOnCloseConnection() {
     final ListenableEditingState editable = sampleEditable(0, 0);

shell/platform/android/test/io/flutter/util/FakeKeyEvent.java

@@ -1,18 +1,37 @@
 package io.flutter.util;
 
 import android.view.KeyEvent;
+import java.util.HashMap;
+import java.util.Map;
 
 // In the test environment, keyEvent.getUnicodeChar throws an exception. This
 // class works around the exception by hardcoding the returned value.
 public class FakeKeyEvent extends KeyEvent {
+
+  private Map<Integer, Integer> keyCodeMap = new HashMap<>();
+
   public FakeKeyEvent(int action, int keyCode) {
     super(action, keyCode);
+    keyCodeMap.put(KEYCODE_1, (int) '1');
+    keyCodeMap.put(KEYCODE_2, (int) '2');
+    keyCodeMap.put(KEYCODE_3, (int) '3');
+    keyCodeMap.put(KEYCODE_4, (int) '4');
+    keyCodeMap.put(KEYCODE_5, (int) '5');
+    keyCodeMap.put(KEYCODE_6, (int) '6');
+    keyCodeMap.put(KEYCODE_7, (int) '7');
+    keyCodeMap.put(KEYCODE_8, (int) '8');
+    keyCodeMap.put(KEYCODE_9, (int) '9');
+    keyCodeMap.put(KEYCODE_0, (int) '0');
   }
 
   public final int getUnicodeChar() {
-    if (getKeyCode() == KeyEvent.KEYCODE_BACK) {
+    int code = getKeyCode();
+    if (code == KeyEvent.KEYCODE_BACK) {
       return 0;
     }
+    if (keyCodeMap.containsKey(code)) {
+      return keyCodeMap.get(code);
+    }
     return 1;
   }
 }