HoHo: 2014

1. APK UI 解說

1.1 開啟畫面

開起畫面如上圖貼, 並伴隨音樂 .中間雲端圖示是"借用" IMP 網站的.

帳號功能尚未加入, 輸入密碼後才能進入操作畫面

1.2 操作畫面 2-1

一進入操作畫面先執行狀態檢查.....

1.2 操作畫面 2-2

檢查完畢若雙端網路皆開啟 (手機&IMP)且IMP 與server 連線正常,狀態列顯示"狀態已更新", 並自動調整開關位置反應實際狀況, 下方黑色顯示區 1,1,1,1,1,1 為IMP 輸出準位 (1=H, 0=L).

1.3 錯誤畫面

檢查完畢若IMP無正常連線 pop up a "無線網卡無回應" message

2.程式碼架構

3.1 MainActivity.java

相關變數宣告及定義

============================================

public class MainActivity extends Activity {

/** Called when the activity is first created. */

TextView etResponse; // 顯示密碼登入狀況

private Button bt1; // "進入" 按鍵

String UID="jason"; // 密碼

private int alertId;

private SoundPool soundPool;

Handler aHandler;

聲音播放

==================================================

soundPool = new SoundPool(1, AudioManager.STREAM_MUSIC, 5);

alertId = soundPool.load(this, R.raw.start_up, 1);

aHandler = new Handler();

aHandler.post(runnable);

final Runnable runnable = new Runnable() {

public void run() {

try{

Thread.sleep(500);

}

catch(InterruptedException e){

e.printStackTrace();

}

soundPool.play(alertId, 1.0F, 1.0F, 0, 0, 1.0F);

}

};

第一行, 將soundPool產生實體，第一個參數為soundPool可以支持的聲音數量，這決定了Android為其開設多大的緩衝區，第二個參數為聲音類型，在這裡標識為系統聲音，除此之外還有AudioManager.STREAM_RING以及AudioManager.STREAM_MUSIC等，系統會根據不同的聲音為其標誌不同的優先順序和緩衝區，最後參數為聲音品質，品質越高，聲音效果越好，但耗費更多的系統資源。

第二行，系統為soundPool載入聲音，第一個參數為上下文參數，第二個參數為聲音的id，一般我們將聲音資訊保存在res的raw資料夾下。第三個參數為聲音的優先順序，當多個聲音衝突而無法同時播放時，系統會優先播放優先順序高的。

為了解決 SoundPool 音效直接放在onCreate裡，卻放不出來 (原來問題出在於播放音效時，音效檔尚未加載完成所以在DDMS上會出現sample not ready的訊息，沒有完成載入音效檔導致不能播放。). 使用timer物件runnable方法來給程式時間. 這裡延遲了 500 msec.

這裡利用 Intent 來執行 Activity 的切換 (跳至 LEDActivity, 沒有傳任何值)

==============================================================

public void onClick(View v) {

String content = CodeEditText.getText().toString(); //gets you the contents of edit text

if (content.equals(UID)) {

etResponse.setBackgroundColor(0xFF00DD00);

etResponse.setText(content+"...ok");

Intent intent = new Intent();

intent.setClass(MainActivity.this, LEDActivity.class);

startActivity(intent);

}

else{

etResponse.setBackgroundColor(0xFFFF5809);

etResponse.setText("密碼錯誤");

}

4. LEDActivity

相關變數宣告及定義

============================================

public class LEDActivity<var> extends Activity {

TextView etResponse;

TextView tvIsConnected; // 狀態列訊息

private Button bt1; // 狀態確認鍵

private Switch sw1,sw2,sw3,sw4,sw5,sw6; // 開關鍵

String disconnect= "手機網路不存在"; // 手機網路未開錯誤訊息

String checkIMP="請檢查無線網卡"; //未能連接 IMP 錯誤訊息

String one="1";

String UID="jason"; // 網址加入 UID 與 IMP squirrel agent code 設定一致

private Button t_bt1_on,t_bt2_on,t_bt3_on,t_bt4_on,t_bt5_on,t_bt6_on; // 定開按鍵

private Button t_bt1_off,t_bt2_off,t_bt3_off,t_bt4_off,t_bt5_off,t_bt6_off; // 定關按鍵

int timer=10000; // 定該關時間 10sec

int setting=0;

private MyCount mc; //計時器宣告

String LED="";

int vibration=0; // vibrator 震動持續時間

private int alert_button, alert_error; // 聲音檔 ID　定義

private SoundPool soundPool;

計時器代碼

============================================

class MyCount extends CountDownTimer {

public MyCount(long millisInFuture, long countDownInterval) {

super(millisInFuture, countDownInterval);

}

@Override

public void onFinish()

{

}

@Override

public void onTick(long millisUntilFinished) {

tvIsConnected.setText(LED+"設定時間:"+timer/1000+" /剩餘時間:"+millisUntilFinished/1000);

}

OnCreate代碼

============================================

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.led_main);

// get reference to the views

etResponse = (TextView) findViewById(R.id.etResponse);

tvIsConnected = (TextView) findViewById(R.id.tvIsConnected);

soundPool = new SoundPool(1, AudioManager.STREAM_MUSIC, 5);

alert_button = soundPool.load(this, R.raw.button, 1);

alert_error = soundPool.load(this, R.raw.error, 1);

// add for timer 0411

RegisterAlarmBroadcast();

tvIsConnected.setText("狀態檢查中...");

new StatusAsyncTask().execute("https://agent.electricimp.com/nGZM1At9qnAa?uid="+UID+"&status");

bt1 = (Button) findViewById(R.id.button1);

bt1.setOnClickListener(new Button.OnClickListener() {

// check if bt1 pressed

public void onClick(View v) {

vibrate(vibration);

soundPool.play(alert_button, 1.0F, 1.0F, 0, 0, 1.0F);

// check if network is connected

if(isConnected())

{

tvIsConnected.setText("狀態檢查中...");

new StatusAsyncTask().execute("https://agent.electricimp.com/nGZM1At9qnAa? uid="+UID+"&status");

}

// not connected

else{

// tvIsConnected.setBackgroundColor(0xFFFF5809);

// tvIsConnected.setText(disconnect);

soundPool.play(alert_error, 1.0F, 1.0F, 0, 0, 1.0F);

Builder dialog = new AlertDialog.Builder(LEDActivity.this)

.setIcon(android.R.drawable.btn_star_big_on)

.setTitle("錯誤")

.setMessage(disconnect)

.setNegativeButton("close",null);

dialog.show();

}

});

sw1 = (Switch) findViewById(R.id.switch1);

sw1.setOnCheckedChangeListener(new OnCheckedChangeListener() {

public void onCheckedChanged(CompoundButton buttonView,

boolean isChecked) {

// tvIsConnected.setBackgroundColor(0xFFFFFFFF);

soundPool.play(alert_button, 1.0F, 1.0F, 0, 0, 1.0F);

vibrate(vibration);

if(isConnected()){

if (isChecked)

// sw1 on

new HttpAsyncTask().execute("https://agent.electricimp.com/nGZM1At9qnAa?uid="+UID+"&dev1=1");

// sw1 off

else

new HttpAsyncTask().execute("https://agent.electricimp.com/nGZM1At9qnAa?uid="+UID+"&dev1=0");

}

else {

// not connected

// tvIsConnected.setBackgroundColor(0xFFFF5809);

// tvIsConnected.setText(disconnect);

soundPool.play(alert_error, 1.0F, 1.0F, 0, 0, 1.0F);

Builder dialog = new AlertDialog.Builder(LEDActivity.this)

.setIcon(android.R.drawable.btn_star_big_on)

.setTitle("錯誤")

.setMessage(disconnect)

.setNegativeButton("close", null);

dialog.show();

}

});

進入操作畫面立即執行 StatusAsyncTask() 狀態檢查, 之後偵測 button and switch, 若是在有網路情況下則執行 HttpAsyncTask() 否則執行錯誤對話框 AlertDialog 顯示錯誤.

定時開關代碼

============================================

t_bt1_on = (Button) findViewById(R.id.button_t1);

t_bt1_on.setOnClickListener(new Button.OnClickListener() {

public void onClick(View v) {

alarmManager.set( AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + timer , pendingIntent );

setting=11;

mc=new MyCount(timer,1000);

mc.start();

LED="LED1";

}

});

t_bt1_off = (Button) findViewById(R.id.button_t1off);

t_bt1_off.setOnClickListener(new Button.OnClickListener() {

public void onClick(View v)

{

alarmManager.set( AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + timer , pendingIntent );

setting=10;

mc=new MyCount(timer,1000);

mc.start();

LED="LED1";

}

});

t_bt1_on/off 為定是開關鍵, 按下時執行計數 MyCount , 計數完成傳出 setting 常數供開關改變狀態

HTTP send and get 代碼

============================================

public static String GET(String url){

InputStream inputStream = null;

String result = "";

try {

HttpClient httpclient = new DefaultHttpClient();

HttpResponse httpResponse = httpclient.execute(new HttpGet(url));

inputStream = httpResponse.getEntity().getContent();

if(inputStream != null)

result = convertInputStreamToString(inputStream);

else

result = "Did not work!";

} catch (Exception e) {

Log.d("InputStream", e.getLocalizedMessage());

}

return result;

}

private static String convertInputStreamToString(InputStream inputStream) throws IOException{

BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));

String line = "";

String result = "";

while((line = bufferedReader.readLine()) != null)

result += line;

inputStream.close();

return result;

}

public boolean isConnected(){

ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();

if (networkInfo != null && networkInfo.isConnected())

return true;

else

return false;

}

public class HttpAsyncTask extends AsyncTask<String, Void, String> {

@Override

protected String doInBackground(String... urls) {

GET(urls[0]);

return GET(urls[0]);

}

// onPostExecute displays the results of the AsyncTask.

@Override

protected void onPostExecute(String result) {

if(result.substring(0, 1).equals("I")) {

try {

Thread.sleep(2000);

}

catch (InterruptedException e)

{

e.printStackTrace();

}

soundPool.play(alert_error, 1.0F, 1.0F, 0, 0, 1.0F);

Builder dialog = new AlertDialog.Builder(LEDActivity.this)

.setIcon(android.R.drawable.btn_star_big_on)

.setTitle("錯誤")

.setMessage("無線網卡無回應")

.setNegativeButton("close", null);

dialog.show();

tvIsConnected.setText(checkIMP);

}

else {

tvIsConnected.setText("");

Toast.makeText(getBaseContext(), result, Toast.LENGTH_LONG).show();

}

此處參考 http://hmkcode.com/android-internet-connection-using-http-get-httpclient/ 文中所寫代碼, 唯其中 GET(urls[0]) 同時執行兩次是為了克服 IMP agent 於回傳至 HTTP 時並非為IMP 及時狀態, 而是會有一次的慢差.

HTTP send and get 代碼

============================================

private void RegisterAlarmBroadcast()

{

mReceiver = new BroadcastReceiver()

{

@Override

public void onReceive(Context context, Intent intent)

{

Toast.makeText(context, "設定完成!", Toast.LENGTH_LONG).show();

tvIsConnected.setText("");

switch(setting){