ANDROIDFM Module Learning Four source parsing (11)

Next, take a look at Android\vendor\qcom\opensource\fm\fmapp2\src\com\caf\fmradio\fmtags.java.

When you click the All channels option in the Fmradio.java menu, jump to the Fmtags.java class

Defines a ListView control and a simple adapter

Private ListView LA;

Private arrayadapter<string> adapter;

Refresh the UI interface with handler

Private final Handler Mhandler = Newhandler ();

Use iterators private Iterator ITR;

Iterate over the Fmsharedpreferences class and use the loop to add to the character array, using the adapter display.

 final Runnable mdisplaytaglist = new Runnable () {public void run () {                   String[] tags;                   int l = 0;                   tags = new string[fmsharedpreferences.num_tags]; for (int i = 0; i < fmsharedpreferences.max_num_tag_types; i++) {if (fmsharedpreferences.taglist[                          I] = null) {ITR = Fmsharedpreferences.taglist[i].iterator ();                                              while (Itr.hasnext ()) tags[l++] = ((Fmsharedpreferences.tag_names[i]) + "\ n" +                       "\ T" + (String) itr.next ()); }} adapter = new Arrayadapter (La.getcontext (), Android.                   R.layout.simple_list_item_1, tags);            La.setadapter (adapter); }       };

Re-analyze the class of an FM headset key Android\vendor\qcom\opensource\fm\fmapp2\src\com\caf\fmradio\fmmediabuttonintentreceiver.java

Phone headset controls volume or other, receives action via static registration ("Android.intent.action.MEDIA_BUTTON")

Key to listen for events

KeyEvent event = (keyevent) Intent.getparcelableextra (intent.extra_key_event);

Monitor whether the headset is headphones and tap down to listen

Intkeycode = Event.getkeycode ();

Intkey_action = Event.getaction ();

Send an accompanying intent.extra_key_event broadcast to fmradioservice implement some functions to achieve the answer.

Keyevent.keycode_headsethook: Whether the monitor is a headset

Keyevent.action_down: Whether the monitor presses the key

Keyevent.keycode_media_play_pause: Pause

Keyevent.keycode_media_play Play key

Keyevent.keycode_media_next: Short press = play next music, long press = current music Fast Forward

Keyevent.keycode_media_previous: Short press = Play previous music, long press = current Music rewind

Standard headphones to test for monitoring events

public class Fmmediabuttonintentreceiver extends Broadcastreceiver {private static final String TAG = "Fmmediabuttoninten Treceiver ";p ublic static final String Fm_media_button =" Com.caf.fmradio.action.MEDIA_BUTTON ";p ublic static final String Audio_becoming_noisy = "Com.caf.fmradio.action.AUDIO_BECOMING_NOISY";p ublic void OnReceive (context context,       Intent Intent) {String action = intent.getaction (); if (action = null) && action.equals (Audiomanager.action_audio_becoming_noisy)) {LOG.D (TAG, "Action_au           Dio_becoming_noisy intent received for Action_headset_plug "); Intent i = new Intent (Audio_becoming_noisy);       Context.sendbroadcast (i); } else if ((action = null) && action.equals ("Android.intent.action.MEDIA_BUTTON")) {KeyEvent event = (           KeyEvent) Intent.getparcelableextra (intent.extra_key_event);           if (event = = null) {return;    } int keycode = Event.getkeycode ();       int key_action = Event.getaction ();               if ((Keyevent.keycode_headsethook = = keycode) && (key_action = = keyevent.action_down)) | |               (Keyevent.keycode_media_pause = = KeyCode) | | (Keyevent.keycode_media_play = = keycode))               {LOG.D (TAG, "Action_media_button intent received for Action_down");               Intent i = new Intent (Fm_media_button);               I.putextra (Intent.extra_key_event, EVENT);           Context.sendbroadcast (i); }       }   }

ANDROIDFM Module Learning Four source parsing (11)