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package com.emmoco.example.blinker;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import com.emmoco.android.TargetConnection;
import java.util.ArrayList;
/**
* This activity manages a screen where the user can choose from a list of target devices. These devices include
* the Bluetooth paired devices and the Emmoco mock devices used for testing.
*
* This activity maintains a simple listview. There is an option to jump to the Settings->Bluetooth-Scan activity
* When this activity returns, it refreshes the paired bluetooth device list in case it has changed
*
* This uses a custom Listview Adapter to show a checkmark next to the currently saved device
*
* The devices is stored using standard Android SharedPreferences
*
*/
public class SetDeviceActivity extends Activity{
final static private String TAG="SetDeviceActivity";
private String mCurrentDevice;
private ListView mDeviceList;
private DeviceArrayAdapter mAdapter;
final public static String PREF_DEVICE_NAME = "DEVICE";
final public static String MOCK_DEVICE_LABEL = "Mock Blinker Device";
/**
* Internal class that adapts our array of device strings to a listview. Current choice is highlighted with
* a checkmark
*/
private class DeviceArrayAdapter extends BaseAdapter {
ArrayList<String> mList;
Activity mContext;
DeviceArrayAdapter(Activity context, ArrayList<String> arrayList) {
mList = arrayList;
mContext = context;
}
public int getCount() {
return mList.size();
}
public Object getItem(int i) {
return mList.get(i);
}
public long getItemId(int i) {
return i;
}
/**
* Returns a new view constructed from a simple layout. The layout has a textview for the name of the device
* and a checkmark graphic that is visible or not.
*
* @param i
* @param view
* @param viewGroup
* @return
*/
public View getView(int i, View view, ViewGroup viewGroup) {
LayoutInflater inflator = mContext.getLayoutInflater();
view = inflator.inflate(R.layout.list_item, null);
String name = (String)getItem(i);
String label = name;
// Translate the URI for the device into a pretty label for display in the listview
// If Mock device, use mock label
if (name.contentEquals(TargetConnection.MOCK_BLINKER_PRE)){
label = MOCK_DEVICE_LABEL;
}
if (name.startsWith(TargetConnection.BT_PRE)) {
// If Bluetooth, remove prefix
label = name.substring(TargetConnection.BT_PRE.length());
}
// Set the label in the view
((TextView)view.findViewById(R.id.item_label)).setText(label);
// If the current one, show the checkbox
if (mList.get(i).contentEquals(mCurrentDevice)){
view.findViewById(R.id.checkmark).setVisibility(View.VISIBLE);
}else{
view.findViewById(R.id.checkmark).setVisibility(View.INVISIBLE);
}
return view;
}
// Replace the list with a new one and trigger a redraw on the screen
public void updateList(ArrayList<String> list){
mList = list;
notifyDataSetInvalidated();
}
}
/**
* Standard Android method called at start of activity.
*
* Save the
* @param savedInstanceState
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.set_device_activity);
mDeviceList = (ListView)findViewById(R.id.device_list_view);
mAdapter = new DeviceArrayAdapter(this,TargetConnection.deviceList(true,false));
mDeviceList.setAdapter(mAdapter);
// get the device to connect to from the users preferences
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
mCurrentDevice = prefs.getString(PREF_DEVICE_NAME, TargetConnection.MOCK_BLINKER_PRE);
// Register a handler when one of the list items is clicked. This handler will set the
// preference to use the new device, and finish this activity so we go back to the main activity
mDeviceList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
String newDeviceName = (String)mAdapter.getItem(i);
// Save changed name to preferences
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(SetDeviceActivity.this);
SharedPreferences.Editor edit = prefs.edit();
edit.putString(PREF_DEVICE_NAME, newDeviceName);
edit.commit();
// Set the result so the calling activity know we have changed the device
setResult(RESULT_OK);
finish();
}
} );
}
@Override
protected void onResume() {
// If we are resuming after going to Settings-->Bluetooth, the device list may have changed so update
mAdapter.updateList(TargetConnection.deviceList(true,false));
super.onResume();
}
/**
* Use an intent to call the Android bluetooth settings for scanning bluetooth devices
* @param v
*/
public void onScanDeviceClick(View v) {
Intent i = new Intent();
i.setAction(android.provider.Settings.ACTION_BLUETOOTH_SETTINGS);
startActivity(i);
}
}
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