Android編程基礎(chǔ)實驗報告三

1、南昌航空大學(xué)實驗報告二0一三年一月六日 課程名稱：移動終端編程技術(shù)實驗名稱: Android組件通信和后臺服務(wù)班級：姓名：同組人：指導(dǎo)教師評定：簽名：一、實驗?zāi)康牧私馐褂肐ntent進(jìn)行組件通信的原理，掌握使用 Intent啟動Activity的方法；掌握獲取Activity返回值的方法；了解Intent過濾器的原理與匹配機(jī)制；了解Service的原理和用途；掌握進(jìn)程內(nèi)服務(wù)的管理方法；掌握服務(wù)的隱式啟動和顯式啟動方法；二、實驗工具Eclipse ( MyEclipse ) + ADT + Android2.2 SDK ;三、實驗題目1.編程實現(xiàn)功能描述：主界面上有一個“登錄”按鈕，點擊“登錄”

2、按鈕后打開一個新的Activity ;新的Activity上面有輸入用戶名和密碼的控件，在用戶關(guān)閉這個Activity 后，將用戶輸入的用戶名和密碼傳遞到主界面中。編程要點：主界面 的 Activity 命名為 MainActivity ; 啟動新的 Activity 命名為 UserLoginActivity ;分別使用顯示啟動和隱式啟動的方式，啟動新的Activity ;用戶名中不能出現(xiàn)“ 符號，同時長度不超過12個字符；密碼使用密碼文本顯示方式，即顯示為“ * ”，同時只能為數(shù)字； 返回的用戶名和密碼要以Toast的方式顯示出來； MainActivity 和 UserLoginActi

3、vity 中各個生命周期的回調(diào)函數(shù)中要以Log.i 方式顯示日志信息。2. 編程實現(xiàn) 功能描述：編程建立一個簡單的進(jìn)程內(nèi)服務(wù)，實現(xiàn)比較兩個整數(shù)大小的功能。服務(wù)提供 IntCompare(Int, Int) 函數(shù)，輸入兩個整數(shù)，輸出較大的整數(shù)。 編程要點：主界面的Activity命名為 MainActivity ；提供兩個EditText ，分別輸入兩個整數(shù)；提供一個Botton ，啟動比較過程；提供一個TextView ，顯示較大的整數(shù)；分別使用啟動方式和綁定方式使用Service ；分別使用Handle 和 AsyncTask 更新 TextView 中的內(nèi)容。四、 實驗步驟1. 詳細(xì)工程結(jié)

4、構(gòu)及部分代碼(顯式和隱式都在其中)：結(jié)果：代碼：MainActivity.javapublic class MainActivity extends Activity protected int SUBACTIVITY1 = 1;private static String TAG = "MainActivity"Button button1,button2;public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState);setContentView(R.layout.mai

5、n);Log.i(TAG, "(1) onCreate()");button1 = (Button) this.findViewById(R.id.button1);button2 = (Button) this.findViewById(R.id.button2);button1.setOnClickListener(new View.OnClickListener() public void onClick(View v) Intent intent = newIntent(MainActivity.this,UserLoginActivity.class);Toast

6、.makeText(getApplicationContext(), "顯示啟動",Toast.LENGTH_SHORT).show();startActivityForResult(intent, SUBACTIVITY1););button2.setOnClickListener(new View.OnClickListener()public void onClick(View v) Intent intent = new Intent("com.example.test");Toast.makeText(getApplicationContext

7、(), "隱式啟動",Toast.LENGTH_SHORT).show();startActivityForResult(intent, SUBACTIVITY1););protected void onActivityResult(int requestCode, int resultCode, Intent data) super.onActivityResult(requestCode, resultCode, data);if (resultCode = RESULT_OK) Uri uriData = data.getData();Toast.makeText(g

8、etApplicationContext(), uriData.toString(),Toast.LENGTH_SHORT).show(); else Toast.makeText(getApplicationContext(), "用戶名和密碼為空",Toast.LENGTH_SHORT).show();Override / 可視生命周期開始時被調(diào)用，對用戶界面進(jìn)行必要的更改public void onStart() super.onStart();Log.i(TAG, "(2) onStart()");Override / 在 onStart() 后

9、被調(diào)用，用于恢復(fù)onSaveInstanceState() 保存的用戶界面信息public void onRestoreInstanceState(Bundle savedInstanceState) super.onRestoreInstanceState(savedInstanceState);Log.i(TAG, "(3) onRestoreInstanceState()");Override / 在活動生命周期開始時被調(diào)用，恢復(fù)被onPause() 停止的用于界面更新的資源public void onResume() super.onResume();Log.i(T

10、AG, "(4) onResume()");Override / 在onResume()后被調(diào)用，保存界面信息public void onSaveInstanceState(Bundle savedInstanceState) super.onSaveInstanceState(savedInstanceState);Log.i(TAG, "(5) onSaveInstanceState()");Override / 在重新進(jìn)入可視生命周期前被調(diào)用，載入界面所需要的更改信息public void onRestart() super.onRestart()

11、;Log.i(TAG, "(6) onRestart()");Override / 在活動生命周期結(jié)束時被調(diào)用，用來保存持久的數(shù)據(jù)或釋放占用的資源。public void onPause() super.onPause();Log.i(TAG, "(7) onPause()");Override / 在可視生命周期結(jié)束時被調(diào)用，一般用來保存持久的數(shù)據(jù)或釋放占用的資源public void onStop() super.onStop();Log.i(TAG, "(8) onStop()");Override / 在完全生命周期結(jié)束時被調(diào)

12、用，釋放資源，包括線程、數(shù)據(jù)連接等public void onDestroy() super.onDestroy();Log.i(TAG, "(9) onDestroy()");UserLoginActivity,java public class UserLoginActivity extends Activity EditText username,password;Button submit,reset;private static String TAG = "MainActivity"protected void onCreate(Bundle

13、savedInstanceState) / TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.login);Log.i(TAG, "(1) onCreate()");username=(EditText)this.findViewById(R.id.username);password=(EditText)this.findViewById(R.id.password);submit=(Button)this.findViewById(R.i

14、d.submit);reset=(Button)this.findViewById(R.id.reset);username.setFocusable(true);username.setOnKeyListener(new OnKeyListener()public boolean onKey(View v, int keyCode, KeyEvent event) / TODO Auto-generated method stub int unicodeChar = event.getUnicodeChar(); if(unicodeChar= 64)return true;elseretu

15、rn false;);submit.setOnClickListener(new View.OnClickListener() public void onClick(View v) / TODO Auto-generated method stubString name =username.getText().toString();String pass=password.getText().toString();String uriString="用戶名："+name+"密碼："+pass;Uri data = Uri.parse(uriString

16、);Intent result = new Intent(null, data);setResult(RESULT_OK, result);finish(););reset.setOnClickListener(new View.OnClickListener() public void onClick(View v) / TODO Auto-generated method stub setResult(RESULT_CANCELED, null);finish(););Override / 可視生命周期開始時被調(diào)用，對用戶界面進(jìn)行必要的更改public void onStart() sup

17、er.onStart();Log.i(TAG, "(2) onStart()");Override / 在 onStart() 后被調(diào)用，用于恢復(fù)onSaveInstanceState() 保存的用戶界面信息public void onRestoreInstanceState(Bundle savedInstanceState) super.onRestoreInstanceState(savedInstanceState);Log.i(TAG, "(3) onRestoreInstanceState()");Override / 在活動生命周期開始時被

18、調(diào)用，恢復(fù)被onPause() 停止的用于界面更新的資源public void onResume() super.onResume();Log.i(TAG, "(4) onResume()");Override / 在onResume()后被調(diào)用，保存界面信息public void onSaveInstanceState(Bundle savedInstanceState) super.onSaveInstanceState(savedInstanceState);Log.i(TAG, "(5) onSaveInstanceState()");Overr

19、ide / 在重新進(jìn)入可視生命周期前被調(diào)用，載入界面所需要的更改信息public void onRestart() super.onRestart();Log.i(TAG, "(6) onRestart()");Override / 在活動生命周期結(jié)束時被調(diào)用，用來保存持久的數(shù)據(jù)或釋放占用的 資源。public void onPause() super.onPause();Log.i(TAG, "(7) onPause()");Override / 在可視生命周期結(jié)束時被調(diào)用，一般用來保存持久的數(shù)據(jù)或釋放占用的資源public void onStop()

20、 super.onStop();Log.i(TAG, "(8) onStop()");Override / 在完全生命周期結(jié)束時被調(diào)用，釋放資源，包括線程、數(shù)據(jù)連接等public void onDestroy() super.onDestroy();Log.i(TAG, "(9) onDestroy()");2. 詳細(xì)工程結(jié)構(gòu)及部分代碼(顯式和隱式都在其中)：( 顯式啟動)結(jié)果：部分代碼：MainActivity.javapublic class MainActivity extends Activity /* Called when the activ

21、ity is first created. */public static int maxNum;public static Handler handler=new Handler();private static TextView result=null;private static Button compare=null;private static Button reset=null;private static EditText one=null;private static EditText two=null;public static void UpdateGUI(int refr

22、eshDouble) maxNum=refreshDouble;handler.post(RefreshLable);private static Runnable RefreshLable=new Runnable() public void run() result.setText(String.valueOf(maxNum);public void onCreate(Bundle savedInstanceState) final Bundle mybundle=new Bundle();super.onCreate(savedInstanceState);setContentView(

23、R.layout.main);final Intent intent=newIntent(MainActivity.this,CompareService.class);result=(EditText)findViewById(R.id.result);compare=(Button)findViewById(Rpare);reset=(Button)findViewById(R.id.reset);one=(EditText)findViewById(R.id.one);two=(EditText)findViewById(R.id.two);compare.setOnClickListe

24、ner(new OnClickListener()public void onClick(View v) mybundle.putString("one", one.getText().toString();mybundle.putString("two", two.getText().toString();intent.putExtras(mybundle);startService(intent););reset.setOnClickListener(new OnClickListener()public void onClick(View v) o

25、ne.setText(null);two.setText(null); result.setText(null););CompareService.javapublic class CompareService extends Service private Thread workThread;Bundle bundle=null;int one=0,two=0;public void onCreate() super.onCreate();workThread = new Thread(null,backgroudWork,"WorkThread");Overridepu

26、blic void onStart(Intent intent, int startId) super.onStart(intent, startId);bundle=intent.getExtras();String c1=bundle.getString("one");String c2=bundle.getString("two");if(!c1.toString().equals("")&&!c2.toString().equals("")one=Integer.parseInt(c1);t

27、wo=Integer.parseInt(c2);if (!workThread.isAlive() workThread.start();public IBinder onBind(Intent intent) return null;private Runnable backgroudWork = new Runnable() Overridepublic void run() int randomDouble =IntCompare(one,two);MainActivity.UpdateGUI(randomDouble); stopSelf();int IntCompare(int a,

28、int b)if(a>=b)return a;elsereturn b;( 隱式啟動)結(jié)果：部分代碼：MainActivity.javapublic class MainActivity extends Activity /* Called when the activity is first created. */private boolean isBound = false;private CompareService compareService;int a=0,b=0;Overridepublic void onCreate(Bundle savedInstanceState)

29、super.onCreate(savedInstanceState);setContentView(R.layout.main);final TextView result=(TextView)findViewById(R.id.result);Button compare=(Button)findViewById(Rpare);Button reset=(Button)findViewById(R.id.reset);final EditText one=(EditText)findViewById(R.id.one);final EditText two=(EditText)findVie

30、wById(R.id.two);if(!isBound)Intent serviceIntent=newIntent(MainActivity.this,CompareService.class);bindService(serviceIntent,mConnection,Context.BIND_AUTO_CREATE); isBound=true;compare.setOnClickListener(new OnClickListener()public void onClick(View v) String c1=one.getText().toString();String c2=tw

31、o.getText().toString();if(!c1.equals("")&&!c2.equals("")a=Integer.parseInt(c1);b=Integer.parseInt(c2);result.setText(String.valueOf(compareService.IntCompare(a, b););reset.setOnClickListener(new OnClickListener()public void onClick(View v) one.setText(null);two.setText(null);result.setText(null););private ServiceConnection mConnection=new ServiceConnection()Overridepublic void onServiceConnected(ComponentName name, IBinder service) / TODO Auto-generated method stubcompareService=(CompareService.LocalBinder)servic