Android开发- Intent和Broadcast Receiver

    Intent intent = new Intent(MyActivity.this, SelectHorseActivity.class);
    startActivity(intent); 

// Create the implicit Intent to use to start a new Activity.
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:555-2368"));

startActivity(intent);

    if (somethingWeird && itDontLookGood) {
      // Create the implicit Intent to use to start a new Activity.
      Intent intent = 
        new Intent(Intent.ACTION_DIAL, Uri.parse("tel:555-2368"));

      // Check if an Activity exists to perform this action.
      PackageManager pm = getPackageManager();
      ComponentName cn = intent.resolveActivity(pm);
      if (cn == null) {
        // If there is no Activity available to perform the action
        // Check to see if the Market is available.
        Uri marketUri =
          Uri.parse("market://search?q=pname:com.myapp.packagename");
        Intent marketIntent = new 
          Intent(Intent.ACTION_VIEW).setData(marketUri);

        // If the Market is available, use it to download an application
        // capable of performing the required action. Otherwise log an
        // error.
        if (marketIntent.resolveActivity(pm) != null)
          startActivity(marketIntent);
        else
          Log.d(TAG, "Market client not available.");
      } 
      else 
        startActivity(intent);
    } 

  private static final int SHOW_SUBACTIVITY = 1;

  private void startSubActivity() {
    Intent intent = new Intent(this, MyOtherActivity.class);
    startActivityForResult(intent, SHOW_SUBACTIVITY);
  }

  private static final int PICK_CONTACT_SUBACTIVITY = 2;

  private void startSubActivityImplicitly() {
    Uri uri = Uri.parse("content://contacts/people");
    Intent intent = new Intent(Intent.ACTION_PICK, uri);
    startActivityForResult(intent, PICK_CONTACT_SUBACTIVITY);
  }

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.selector_layout);
    
    final ListView listView = (ListView)findViewById(R.id.listView1);
    
    Button okButton = (Button) findViewById(R.id.ok_button);
    okButton.setOnClickListener(new View.OnClickListener() {
      public void onClick(View view) {
        long selected_horse_id = listView.getSelectedItemId();
            
        Uri selectedHorse = Uri.parse("content://horses/" + 
                                       selected_horse_id);
        Intent result = new Intent(Intent.ACTION_PICK, selectedHorse);

        setResult(RESULT_OK, result);
        finish();
      }
    });

    Button cancelButton = (Button) findViewById(R.id.cancel_button);
    cancelButton.setOnClickListener(new View.OnClickListener() {
      public void onClick(View view) {
        setResult(RESULT_CANCELED);
        finish();
      }
    });
  }

  private static final int SELECT_HORSE = 1;
  private static final int SELECT_GUN = 2;

  Uri selectedHorse = null;
  Uri selectedGun = null;

  @Override
  public void onActivityResult(int requestCode, 
                               int resultCode,
                               Intent data) {

    super.onActivityResult(requestCode, resultCode, data);

    switch(requestCode) {
      case (SELECT_HORSE):
        if (resultCode == Activity.RESULT_OK)
          selectedHorse = data.getData();
        break;

      case (SELECT_GUN):
        if (resultCode == Activity.RESULT_OK)
          selectedGun = data.getData();
        break;

      default: break;
    }
  }

final TextView myTextView = (TextView)findViewById(R.id.text_view);
Linkify.addLinks(myTextView, Linkify.WEB_URIS|Linkify.EMAIL_ADDRESSES);

  <TextView
    android:id="@+id/text_view"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello" 
    android:autoLink="phone|email"
/>

  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final TextView myTextView = (TextView)findViewById(R.id.text_view);
    
     // Define the base URI.
     String baseUri = "content://com.paad.earthquake/earthquakes/";
    
     // Contruct an Intent to test if there is an Activity capable of 
     // viewing the content you are Linkifying. Use the Package Manager
     // to perform the test.
     PackageManager pm = getPackageManager();
     Intent testIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(baseUri));
     boolean activityExists = testIntent.resolveActivity(pm) != null;
    
     // If there is an Activity capable of viewing the content
     // Linkify the text.
     if (activityExists) {
       int flags = Pattern.CASE_INSENSITIVE;
       Pattern p = Pattern.compile("\\bquake[\\s]?[0-9]+\\b", flags);
       Linkify.addLinks(myTextView, p, baseUri);
     }
  }

  public final static String EXTRA_LIFEFORM_NAME  = "EXTRA_LIFEFORM_NAME";
  public final static String EXTRA_LATITUDE = "EXTRA_LATITUDE";
  public final static String EXTRA_LONGITUDE = "EXTRA_LONGITUDE";

  public static final String ACTION_BURN = "com.paad.alien.action.BURN_IT_WITH_FIRE";

  public static final String NEW_LIFEFORM = "com.paad.alien.action.NEW_LIFEFORM";
  
  //
  private void detectedLifeform(String detectedLifeform, double currentLongitude, double currentLatitude) {
    Intent intent = new Intent(NEW_LIFEFORM);
    intent.putExtra(EXTRA_LIFEFORM_NAME,
                    detectedLifeform);
    intent.putExtra(EXTRA_LONGITUDE,
                    currentLongitude);
    intent.putExtra(EXTRA_LATITUDE,
                    currentLatitude);

    sendBroadcast(intent);
  }

public class LifeformDetectedReceiver extends BroadcastReceiver {

  @Override
  public void onReceive(Context context, Intent intent) {
    // Get the lifeform details from the intent.
  }
}

public class LifeformDetectedReceiver 
  extends BroadcastReceiver {

  public final static String EXTRA_LIFEFORM_NAME = "EXTRA_LIFEFORM_NAME";
  public final static String EXTRA_LATITUDE = "EXTRA_LATITUDE";
  public final static String EXTRA_LONGITUDE = "EXTRA_LONGITUDE";

  public static final String ACTION_BURN = "com.paad.alien.action.BURN_IT_WITH_FIRE";

  public static final String NEW_LIFEFORM = "com.paad.alien.action.NEW_LIFEFORM";

  @Override
  public void onReceive(Context context, Intent intent) {
    // Get the lifeform details from the intent.
    Uri data = intent.getData();
    String type = intent.getStringExtra(EXTRA_LIFEFORM_NAME);
    double lat = intent.getDoubleExtra(EXTRA_LATITUDE, 0);
    double lng = intent.getDoubleExtra(EXTRA_LONGITUDE, 0);
    Location loc = new Location("gps");
    loc.setLatitude(lat);
    loc.setLongitude(lng);
    if (type.equals("facehugger")) {
      Intent startIntent = new Intent(ACTION_BURN, data);
      startIntent.putExtra(EXTRA_LATITUDE, lat);
      startIntent.putExtra(EXTRA_LONGITUDE, lng);

      context.startService(startIntent);
    }
  }
}

public class MyActivity extends Activity {

  private IntentFilter filter = new IntentFilter(LifeformDetectedReceiver.NEW_LIFEFORM);

  private LifeformDetectedReceiver receiver = new LifeformDetectedReceiver();

  @Override
  public synchronized void onResume() {
    super.onResume();

    // Register the broadcast receiver.
    registerReceiver(receiver, filter); 
  }

  @Override
  public synchronized void onPause() {
    // Unregister the receiver
    unregisterReceiver(receiver);  

    super.onPause();
  }
}

        //注册一个局部Broadcaset Receive
        LocalBroadcastManager lbm=LocalBroadcastManager.getInstance(this);
        lbm.registerReceiver(new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                //TODO
            }
        },new IntentFilter(LOCAL_ACTION));
        
        //发送局部Broadcast Intent
        lbm.sendBroadcast(new Intent(LOCAL_ACTION));
        
        lbm.sendBroadcastSync(new Intent(LOCAL_ACTION));

    <activity android:name=".MyBlogViewerActivity">
      <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="http"
              android:host="blog.radioactiveyak.com"/>
      </intent-filter>
    </activity>

    IntentFilter batIntentFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
    Intent battery = context.registerReceiver(null, batIntentFilter);
    int status = battery.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
    boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING || status == BatteryManager.BATTERY_STATUS_FULL;

    String svcName = Context.CONNECTIVITY_SERVICE;
    ConnectivityManager cm = (ConnectivityManager)context.getSystemService(svcName);

    NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
    boolean isConnected = activeNetwork.isConnectedOrConnecting();
    boolean isMobile = activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE;

    IntentFilter dockIntentFilter = new IntentFilter(Intent.ACTION_DOCK_EVENT);
    Intent dock = context.registerReceiver(null, dockIntentFilter);

    int dockState = dock.getIntExtra(Intent.EXTRA_DOCK_STATE, Intent.EXTRA_DOCK_STATE_UNDOCKED );
    boolean isDocked = dockState != Intent.EXTRA_DOCK_STATE_UNDOCKED;

    ComponentName myReceiverName = new ComponentName(this, MyReceiver.class);
    PackageManager pm = getPackageManager();

    // Enable a manifest receiver
    pm.setComponentEnabledSetting(myReceiverName,
      PackageManager.COMPONENT_ENABLED_STATE_ENABLED, 
      PackageManager.DONT_KILL_APP);

    // Disable a manifest receiver
    pm.setComponentEnabledSetting(myReceiverName,
      PackageManager.COMPONENT_ENABLED_STATE_DISABLED, 
      PackageManager.DONT_KILL_APP);
    
    // View Output
    Log.d(TAG, "Is Charging? " + isCharging);
    Log.d(TAG, "Is Connected? " + isConnected);
    Log.d(TAG, "Is Mobile? " + isMobile);
    Log.d(TAG, "Is Docked? " + isDocked);