Stack alert dialog buttons when they are too long

Change-Id: Id1c0b8c0a8fd1c9949b15269fba52e88ef826e6b

2 files changed, 92 insertions, 1 deletions

diff --git a/core/java/com/android/internal/os/ZygoteInit.java b/core/java/com/android/internal/os/ZygoteInit.java
index 8107985..2477d94 100644
--- a/core/java/com/android/internal/os/ZygoteInit.java
+++ b/core/java/com/android/internal/os/ZygoteInit.java
@@ -355,7 +355,7 @@ public class ZygoteInit {
                 Log.v(TAG, "Preloading resource #" + Integer.toHexString(id));
             }
             if (id != 0) {
-                if (mResources.getColorStateList(id) == null) {
+                if (mResources.getColorStateList(id, null) == null) {
                     throw new IllegalArgumentException(
                             "Unable to find preloaded color resource #0x"
                             + Integer.toHexString(id)
diff --git a/core/java/com/android/internal/widget/ButtonBarLayout.java b/core/java/com/android/internal/widget/ButtonBarLayout.java
new file mode 100644
index 0000000..64e6c69
--- /dev/null
+++ b/core/java/com/android/internal/widget/ButtonBarLayout.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.LinearLayout;
+
+import com.android.internal.R;
+
+/**
+ * An extension of LinearLayout that automatically switches to vertical
+ * orientation when it can't fit its child views horizontally.
+ */
+public class ButtonBarLayout extends LinearLayout {
+    /** Spacer used in horizontal orientation. */
+    private final View mSpacer;
+
+    /** Whether the current configuration allows stacking. */
+    private final boolean mAllowStacked;
+
+    /** Whether the layout is currently stacked. */
+    private boolean mStacked;
+
+    public ButtonBarLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        mAllowStacked = context.getResources().getBoolean(R.bool.allow_stacked_button_bar);
+        mSpacer = findViewById(R.id.spacer);
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+        super.onSizeChanged(w, h, oldw, oldh);
+
+        // Maybe we can fit the content now?
+        if (w > oldw && mStacked) {
+            setStacked(false);
+        }
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+        if (mAllowStacked && getOrientation() == LinearLayout.HORIZONTAL) {
+            final int measuredWidth = getMeasuredWidthAndState();
+            final int measuredWidthState = measuredWidth & MEASURED_STATE_MASK;
+            if (measuredWidthState == MEASURED_STATE_TOO_SMALL) {
+                setStacked(true);
+
+                // Measure again in the new orientation.
+                super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+            }
+        }
+    }
+
+    private void setStacked(boolean stacked) {
+        setOrientation(stacked ? LinearLayout.VERTICAL : LinearLayout.HORIZONTAL);
+        setGravity(stacked ? Gravity.RIGHT : Gravity.BOTTOM);
+
+        if (mSpacer != null) {
+            mSpacer.setVisibility(stacked ? View.GONE : View.INVISIBLE);
+        }
+
+        // Reverse the child order. This is specific to the Material button
+        // bar's layout XML and will probably not generalize.
+        final int childCount = getChildCount();
+        for (int i = childCount - 2; i >= 0; i--) {
+            bringChildToFront(getChildAt(i));
+        }
+
+        mStacked = stacked;
+    }
+}