auto import from //depot/cupcake/@135843

src/com/android/settings/bluetooth/BluetoothDevicePreference.java

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2008 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.settings.bluetooth;
+
+import com.android.settings.R;
+
+import android.content.Context;
+import android.preference.Preference;
+import android.util.TypedValue;
+import android.view.View;
+import android.widget.ImageView;
+
+/**
+ * BluetoothDevicePreference is the preference type used to display each remote
+ * Bluetooth device in the Bluetooth Settings screen.
+ */
+public class BluetoothDevicePreference extends Preference implements LocalBluetoothDevice.Callback {
+    private static final String TAG = "BluetoothDevicePreference";
+
+    private static int sDimAlpha = Integer.MIN_VALUE;
+    
+    private LocalBluetoothDevice mLocalDevice;
+    
+    /**
+     * Cached local copy of whether the device is busy. This is only updated
+     * from {@link #onDeviceAttributesChanged(LocalBluetoothDevice)}.
+     */ 
+    private boolean mIsBusy;
+    
+    public BluetoothDevicePreference(Context context, LocalBluetoothDevice localDevice) {
+        super(context);
+
+        if (sDimAlpha == Integer.MIN_VALUE) {
+            TypedValue outValue = new TypedValue();
+            context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, outValue, true);
+            sDimAlpha = (int) (outValue.getFloat() * 255);
+        }
+            
+        mLocalDevice = localDevice;
+        
+        setLayoutResource(R.layout.preference_bluetooth);
+        
+        localDevice.registerCallback(this);
+        
+        onDeviceAttributesChanged(localDevice);
+    }
+    
+    public LocalBluetoothDevice getDevice() {
+        return mLocalDevice;
+    }
+
+    @Override
+    protected void onPrepareForRemoval() {
+        super.onPrepareForRemoval();
+        mLocalDevice.unregisterCallback(this);
+    }
+
+    public void onDeviceAttributesChanged(LocalBluetoothDevice device) {
+
+        /*
+         * The preference framework takes care of making sure the value has
+         * changed before proceeding.
+         */
+        
+        setTitle(mLocalDevice.getName());
+        
+        /*
+         * TODO: Showed "Paired" even though it was "Connected". This may be
+         * related to BluetoothHeadset not bound to the actual
+         * BluetoothHeadsetService when we got here.
+         */
+        setSummary(mLocalDevice.getSummary());
+
+        // Used to gray out the item
+        mIsBusy = mLocalDevice.isBusy();
+        
+        // Data has changed
+        notifyChanged();
+        
+        // This could affect ordering, so notify that also
+        notifyHierarchyChanged();
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return super.isEnabled() && !mIsBusy;
+    }
+
+    @Override
+    protected void onBindView(View view) {
+        super.onBindView(view);
+
+        ImageView btClass = (ImageView) view.findViewById(R.id.btClass);
+        btClass.setImageResource(mLocalDevice.getBtClassDrawable());
+        btClass.setAlpha(isEnabled() ? 255 : sDimAlpha);        
+    }
+
+    @Override
+    public int compareTo(Preference another) {
+        if (!(another instanceof BluetoothDevicePreference)) {
+            // Put other preference types above us
+            return 1;
+        }
+        
+        return mLocalDevice.compareTo(((BluetoothDevicePreference) another).mLocalDevice);
+    }
+ 
+}