[ButtonGroup] Added overflow feature.

PiperOrigin-RevId: 762686060

Author: pekingme

catalog/java/io/material/catalog/button/ButtonGroupDemoFragment.java

@@ -71,8 +71,10 @@ public View onCreateDemoView(
     groupToggleableToggle.setOnCheckedChangeListener(
         (buttonView, isChecked) -> {
           for (MaterialButton button : buttons) {
-            button.setCheckable(isChecked);
-            button.refreshDrawableState();
+            if (button.getTag() != MaterialButtonGroup.OVERFLOW_BUTTON_TAG) {
+              button.setCheckable(isChecked);
+              button.refreshDrawableState();
+            }
           }
         });
     MaterialSwitch groupEnabledToggle = view.findViewById(R.id.switch_enable);
@@ -91,16 +93,18 @@ public View onCreateDemoView(
           }
         });
     for (MaterialButton button : buttons) {
-      MaterialButtonGroup buttonGroup = (MaterialButtonGroup) button.getParent();
-      button.setOnClickListener(
-          v -> {
-            String snackbarText = button.getText() + "";
-            if (snackbarText.isEmpty()) {
-              snackbarText = button.getContentDescription() + "";
-            }
-            snackbarText += " button clicked.";
-            Snackbar.make(buttonGroup, snackbarText, Snackbar.LENGTH_LONG).show();
-          });
+      if (button.getTag() != MaterialButtonGroup.OVERFLOW_BUTTON_TAG) {
+        MaterialButtonGroup buttonGroup = (MaterialButtonGroup) button.getParent();
+        button.setOnClickListener(
+            v -> {
+              String snackbarText = button.getText() + "";
+              if (snackbarText.isEmpty()) {
+                snackbarText = button.getContentDescription() + "";
+              }
+              snackbarText += " button clicked.";
+              Snackbar.make(buttonGroup, snackbarText, Snackbar.LENGTH_LONG).show();
+            });
+      }
     }
     return view;
   }

catalog/java/io/material/catalog/button/ButtonGroupRuntimeDemoFragment.java

@@ -17,7 +17,12 @@
 
 import io.material.catalog.R;
 
+import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
+
 import android.annotation.SuppressLint;
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -29,12 +34,17 @@
 import androidx.annotation.Nullable;
 import com.google.android.material.button.MaterialButton;
 import com.google.android.material.button.MaterialButtonGroup;
+import com.google.android.material.materialswitch.MaterialSwitch;
+import com.google.android.material.snackbar.Snackbar;
 import io.material.catalog.feature.DemoFragment;
 
 /** A fragment that displays a button group demo for adding and removing buttons at runtime. */
 public class ButtonGroupRuntimeDemoFragment extends DemoFragment {
 
   private static final int MAX_COUNT = 10;
+  private final String[] labels = new String[MAX_COUNT];
+  private final Drawable[] icons = new Drawable[MAX_COUNT];
+  private MaterialButtonGroup buttonGroup;
   private int buttonCount;
   private Button addButton;
   private Button removeButton;
@@ -52,43 +62,107 @@ public View onCreateDemoView(
     View view =
         layoutInflater.inflate(
             R.layout.cat_buttons_group_runtime_fragment, viewGroup, /* attachToRoot= */ false);
+    Context context = view.getContext();
+
+    buttonGroup = view.findViewById(R.id.cat_dynamic_button_group_label_only);
 
-    MaterialButtonGroup buttonGroup = view.findViewById(R.id.cat_dynamic_button_group);
     addButton = view.findViewById(R.id.cat_add_button);
     removeButton = view.findViewById(R.id.cat_remove_button);
-    updateControl();
     addButton.setOnClickListener(
         new OnClickListener() {
           @SuppressLint("SetTextI18n")
           @Override
           public void onClick(View v) {
-            MaterialButton button = new MaterialButton(view.getContext());
-            button.setText("Button");
-            buttonGroup.addView(
-                button,
-                -1,
-                new LayoutParams(
-                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, 1));
+            addButton(context);
             buttonCount++;
             updateControl();
           }
         });
     removeButton.setOnClickListener(
         v -> {
-          buttonGroup.removeViewAt(buttonGroup.getChildCount() - 1);
+          buttonGroup.removeViewAt(buttonCount - 1);
           buttonCount--;
           updateControl();
         });
 
+    updateControl();
+    loadResources();
+
+    MaterialSwitch lastCheckedSwitch = view.findViewById(R.id.last_checked_switch);
+    lastCheckedSwitch.setOnCheckedChangeListener(
+        (buttonView, isChecked) -> {
+          if (ensureAtLeastOneButton()) {
+            MaterialButton lastButton = (MaterialButton) buttonGroup.getChildAt(buttonCount - 1);
+            lastButton.setChecked(isChecked);
+            lastButton.refreshDrawableState();
+          }
+        });
+    MaterialSwitch lastCheckableSwitch = view.findViewById(R.id.last_checkable_switch);
+    lastCheckableSwitch.setOnCheckedChangeListener(
+        (buttonView, isChecked) -> {
+          if (ensureAtLeastOneButton()) {
+            MaterialButton lastButton = (MaterialButton) buttonGroup.getChildAt(buttonCount - 1);
+            lastButton.setCheckable(isChecked);
+            lastButton.refreshDrawableState();
+            lastCheckedSwitch.setEnabled(isChecked);
+          }
+        });
+    MaterialSwitch enableSwitch = view.findViewById(R.id.last_enabled_switch);
+    enableSwitch.setOnCheckedChangeListener(
+        (buttonView, isChecked) -> {
+          if (ensureAtLeastOneButton()) {
+            MaterialButton lastButton = (MaterialButton) buttonGroup.getChildAt(buttonCount - 1);
+            lastButton.setEnabled(isChecked);
+            lastButton.refreshDrawableState();
+          }
+        });
+
     return view;
   }
 
-  private void updateControl(){
-    if(buttonCount == 0){
+  private boolean ensureAtLeastOneButton() {
+    if (buttonCount == 0) {
+      Snackbar.make(buttonGroup, "Add a button first.", Snackbar.LENGTH_LONG).show();
+      return false;
+    }
+    return true;
+  }
+
+  private void addButton(@NonNull Context context) {
+    MaterialButton button = new MaterialButton(context);
+    button.setText(labels[buttonCount]);
+    button.setIcon(icons[buttonCount]);
+    button.setCheckable(true);
+    button.setMaxLines(1);
+    buttonGroup.addView(button, new LayoutParams(WRAP_CONTENT, WRAP_CONTENT, 1));
+    MaterialButtonGroup.LayoutParams lp =
+        (MaterialButtonGroup.LayoutParams) button.getLayoutParams();
+    lp.overflowText = labels[buttonCount];
+    lp.overflowIcon = icons[buttonCount];
+  }
+
+  private void loadResources() {
+    TypedArray labelsRes = getResources().obtainTypedArray(R.array.cat_button_group_dynamic_labels);
+    for (int i = 0; i < MAX_COUNT; i++) {
+      labels[i] = labelsRes.getString(i % labelsRes.length());
+    }
+    labelsRes.recycle();
+    TypedArray iconsRes = getResources().obtainTypedArray(R.array.cat_button_group_dynamic_icons);
+    for (int i = 0; i < MAX_COUNT; i++) {
+      int iconId = iconsRes.getResourceId(i % iconsRes.length(), 0);
+      if (iconId != 0) {
+        icons[i] = getResources().getDrawable(iconId);
+      }
+    }
+    iconsRes.recycle();
+  }
+
+  private void updateControl() {
+    if (buttonCount == 0) {
       removeButton.setEnabled(false);
-    }else if(buttonCount == MAX_COUNT){
+    } else if (buttonCount == MAX_COUNT) {
       addButton.setEnabled(false);
-    }else{
+    } else {
       addButton.setEnabled(true);
       removeButton.setEnabled(true);
     }