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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package android.car.usb.handler;
     17 
     18 import android.annotation.Nullable;
     19 import android.app.Activity;
     20 import android.content.ComponentName;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.pm.ApplicationInfo;
     24 import android.content.pm.PackageManager;
     25 import android.content.pm.PackageManager.NameNotFoundException;
     26 import android.hardware.usb.UsbDevice;
     27 import android.hardware.usb.UsbManager;
     28 import android.os.Bundle;
     29 import android.util.Log;
     30 import android.view.View;
     31 import android.view.ViewGroup;
     32 import android.widget.AdapterView;
     33 import android.widget.ArrayAdapter;
     34 import android.widget.ImageView;
     35 import android.widget.LinearLayout;
     36 import android.widget.ListView;
     37 import android.widget.TextView;
     38 import java.util.List;
     39 
     40 /**
     41  * Activity to handle USB device attached.
     42  * <p>
     43  * When user plugs in USB device: a) Device was used before and user selected handler for it. In
     44  * this case handler will be launched. b) Device has not handler assigned. In this case supported
     45  * handlers will be captured, and user will be presented with choice to assign default handler.
     46  * After that handler will be launched.
     47  */
     48 public class UsbHostManagementActivity extends Activity
     49         implements UsbHostController.UsbHostControllerCallbacks {
     50     private static final String TAG = UsbHostManagementActivity.class.getSimpleName();
     51 
     52     private HandlersAdapter mListAdapter;
     53     private ListView mHandlersList;
     54     private LinearLayout mProgressInfo;
     55     private UsbHostController mController;
     56     private PackageManager mPackageManager;
     57 
     58     private final AdapterView.OnItemClickListener mHandlerClickListener =
     59             new AdapterView.OnItemClickListener() {
     60         @Override
     61         public void onItemClick(AdapterView<?> parent, final View view, int position, long id) {
     62             UsbDeviceSettings settings = (UsbDeviceSettings) parent.getItemAtPosition(position);
     63             settings.setDefaultHandler(true);
     64             mController.applyDeviceSettings(settings);
     65         }
     66     };
     67 
     68     @Override
     69     public void onCreate(Bundle savedInstanceState) {
     70         super.onCreate(savedInstanceState);
     71         setContentView(R.layout.usb_host);
     72         mHandlersList = (ListView) findViewById(R.id.usb_handlers_list);
     73         mProgressInfo = (LinearLayout) findViewById(R.id.usb_handlers_progress);
     74         mListAdapter = new HandlersAdapter(this);
     75         mHandlersList.setAdapter(mListAdapter);
     76         mHandlersList.setOnItemClickListener(mHandlerClickListener);
     77         mController = new UsbHostController(this, this);
     78         mPackageManager = getPackageManager();
     79     }
     80 
     81     @Override
     82     public void onDestroy() {
     83         super.onDestroy();
     84         mController.release();
     85     }
     86 
     87     @Override
     88     public void onResume() {
     89         super.onResume();
     90         UsbDevice connectedDevice = getDevice();
     91         if (connectedDevice != null) {
     92             mController.processDevice(connectedDevice);
     93         } else {
     94             finish();
     95         }
     96     }
     97 
     98     @Override
     99     public void shutdown() {
    100         runOnUiThread(new Runnable() {
    101             @Override
    102             public void run() {
    103                 finish();
    104             }
    105         });
    106     }
    107 
    108     @Override
    109     public void processingStateChanged(final boolean processing) {
    110         runOnUiThread(new Runnable() {
    111             @Override
    112             public void run() {
    113                 mProgressInfo.setVisibility(processing ? View.VISIBLE : View.GONE);
    114             }
    115         });
    116     }
    117 
    118   @Override
    119   public void titleChanged(final String title) {
    120         runOnUiThread(new Runnable() {
    121             @Override
    122             public void run() {
    123                 setTitle(title);
    124             }
    125         });
    126     }
    127 
    128   @Override
    129   public void optionsUpdated(final List<UsbDeviceSettings> options) {
    130         runOnUiThread(new Runnable() {
    131             @Override
    132             public void run() {
    133                 mListAdapter.clear();
    134                 mListAdapter.addAll(options);
    135             }
    136         });
    137     }
    138 
    139 
    140     @Override
    141     public void onNewIntent(Intent intent) {
    142         super.onNewIntent(intent);
    143         setIntent(intent);
    144     }
    145 
    146     @Nullable
    147     private UsbDevice getDevice() {
    148         if (!UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(getIntent().getAction())) {
    149             return null;
    150         }
    151         return (UsbDevice) getIntent().getParcelableExtra(UsbManager.EXTRA_DEVICE);
    152     }
    153 
    154     private class HandlersAdapter extends ArrayAdapter<UsbDeviceSettings> {
    155         class HandlerHolder {
    156             public TextView mAppName;
    157             public ImageView mAppIcon;
    158         }
    159 
    160         HandlersAdapter(Context context) {
    161             super(context, R.layout.usb_handler_row);
    162         }
    163 
    164         @Override
    165         public View getView(int position, View convertView, ViewGroup parent) {
    166             View rowView = convertView;
    167             if (rowView == null) {
    168                 rowView = getLayoutInflater().inflate(R.layout.usb_handler_row, null);
    169                 HandlerHolder holder = new HandlerHolder();
    170                 holder.mAppName = (TextView) rowView.findViewById(R.id.usb_handler_title);
    171                 holder.mAppIcon = (ImageView) rowView.findViewById(R.id.usb_handler_icon);
    172                 rowView.setTag(holder);
    173             }
    174 
    175             HandlerHolder holder = (HandlerHolder) rowView.getTag();
    176             ComponentName handler = getItem(position).getHandler();
    177 
    178             try {
    179                 ApplicationInfo appInfo =
    180                         mPackageManager.getApplicationInfo(handler.getPackageName(), 0);
    181                 holder.mAppName.setText(appInfo.loadLabel(mPackageManager));
    182                 holder.mAppIcon.setImageDrawable(appInfo.loadIcon(mPackageManager));
    183             } catch (NameNotFoundException e) {
    184                 Log.e(TAG, "Handling package not found: " + handler.getPackageName());
    185                 holder.mAppName.setText(handler.flattenToShortString());
    186                 holder.mAppIcon.setImageResource(android.R.color.transparent);
    187             }
    188             return rowView;
    189         }
    190     }
    191 }
    192