android.content.Intent#hasExtra ( )源码实例Demo

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_detail);

    mWeatherDisplay = (TextView) findViewById(R.id.tv_display_weather);

    Intent intentThatStartedThisActivity = getIntent();

    if (intentThatStartedThisActivity != null) {
        if (intentThatStartedThisActivity.hasExtra(Intent.EXTRA_TEXT)) {
            mForecast = intentThatStartedThisActivity.getStringExtra(Intent.EXTRA_TEXT);
            mWeatherDisplay.setText(mForecast);
        }
    }
}
 

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == CARDIO_REQUEST_ID) {
        if (data != null && data.hasExtra(CardIOActivity.EXTRA_SCAN_RESULT)) {
            CreditCard scanResult = data.getParcelableExtra(CardIOActivity.EXTRA_SCAN_RESULT);

            cardNumber.getEditText().setText(scanResult.getFormattedCardNumber());
            if (scanResult.isExpiryValid()) {
                String month = String.valueOf(scanResult.expiryMonth).length() == 1 ? "0" + scanResult.expiryMonth : String.valueOf(scanResult.expiryMonth);
                String year = String.valueOf(scanResult.expiryYear).substring(2);
                expiryInputLayout.getEditText().setText(month + "/" + year);
            }

            if (scanResult.cvv != null) {
                // Never log or display a CVV
                cvvInputLayout.getEditText().setText(scanResult.cvv);
            }

        }
    }
}
 

private void encodeContentsFromShareIntentPlainText(Intent intent) throws WriterException {
  // Notice: Google Maps shares both URL and details in one text, bummer!
  String theContents = ContactEncoder.trim(intent.getStringExtra(Intent.EXTRA_TEXT));
  // We only support non-empty and non-blank texts.
  // Trim text to avoid URL breaking.
  if (theContents == null || theContents.length() == 0) {
    throw new WriterException("Empty EXTRA_TEXT");
  }
  contents = theContents;
  // We only do QR code.
  format = BarcodeFormat.QR_CODE;
  if (intent.hasExtra(Intent.EXTRA_SUBJECT)) {
    displayContents = intent.getStringExtra(Intent.EXTRA_SUBJECT);
  } else if (intent.hasExtra(Intent.EXTRA_TITLE)) {
    displayContents = intent.getStringExtra(Intent.EXTRA_TITLE);
  } else {
    displayContents = contents;
  }
  title = activity.getString(R.string.contents_text);
}
 

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (savedInstanceState != null){
        String mrl = savedInstanceState.getString(BaseBrowserFragment.KEY_MRL);
        if (mrl != null)
            mUri = Uri.parse(mrl);
        mItemSelected = savedInstanceState.getParcelable(SELECTED_ITEM);
    } else {
        Intent intent = getActivity().getIntent();
        if (intent != null && intent.hasExtra(BaseBrowserFragment.KEY_MRL))
            mUri = Uri.parse(intent.getStringExtra(BaseBrowserFragment.KEY_MRL));
    }
    setOnItemViewClickedListener(this);
    setOnItemViewSelectedListener(this);
    setAdapter(mAdapter);

    // UI setting
    setHeadersState(HEADERS_ENABLED);
    setBrandColor(getResources().getColor(R.color.orange800));
}
 

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 940 && adapter != null && adapter.getCurrentFragment() != null) {
        if (resultCode == RESULT_OK) {
            LogUtil.v("Doing hide posts");
            ArrayList<Integer> posts = data.getIntegerArrayListExtra("seen");
            ((MultiredditView) adapter.getCurrentFragment()).adapter.refreshView(posts);
            if (data.hasExtra("lastPage")
                    && data.getIntExtra("lastPage", 0) != 0
                    && ((MultiredditView) adapter.getCurrentFragment()).rv.getLayoutManager() instanceof LinearLayoutManager) {
                ((LinearLayoutManager) ((MultiredditView) adapter.getCurrentFragment()).rv.getLayoutManager())
                        .scrollToPositionWithOffset(data.getIntExtra("lastPage", 0) + 1,
                                mToolbar.getHeight());
            }
        } else {
            ((MultiredditView) adapter.getCurrentFragment()).adapter.refreshView();
        }
    }

}
 

@Override
protected void onHandleIntent(Intent intent)
{
	if (intent.hasExtra(EXTRA_NEW_MESSAGES_NOTIFICATION_CLEARED))
	{
		// Set the 'new messages notification currently displayed' shared preference to false
		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
		SharedPreferences.Editor editor = prefs.edit();
	    editor.putBoolean(KEY_NEW_MESSAGES_NOTIFICATION_CURRENTLY_DISPLAYED, false);
	    editor.commit();
	    
	    Log.i(TAG, "Recorded dismissal of new messages notification");
	}
	else if (intent.hasExtra(EXTRA_DISPLAY_NEW_MESSAGES_NOTIFICATION))
	{
		int newMessages = intent.getExtras().getInt(EXTRA_DISPLAY_NEW_MESSAGES_NOTIFICATION);
		
		displayNewMessagesNotification(newMessages);
	}
	else if (intent.hasExtra(EXTRA_DISPLAY_UNLOCK_NOTIFICATION))
	{
		displayUnlockNotification();
	}
}
 

@Override
public void onReceive(Context context, Intent intent) {
    if (!intent.hasExtra(AndroidSharedKeyRecord.EXTRA_KEY_ID)) {
        return;
    }

    String keyId = intent.getStringExtra(AndroidSharedKeyRecord.EXTRA_KEY_ID);
    SqlStorage<AndroidSharedKeyRecord> storage = CommCareApplication.instance().getGlobalStorage(AndroidSharedKeyRecord.class);
    AndroidSharedKeyRecord sharingKey;
    try {
        sharingKey = storage.getRecordForValue(AndroidSharedKeyRecord.META_KEY_ID, keyId);
    } catch (NoSuchElementException nsee) {
        //No valid key record;
        return;
    }

    Bundle b = sharingKey.getIncomingCallout(intent);

    performAction(context, b);
}
 

/**
 * Create a {@link FabTransform} from the supplied {@code activity} extras and set as its
 * shared element enter/return transition.
 */
public static boolean setup(@NonNull Activity activity, @Nullable View target) {
    final Intent intent = activity.getIntent();
    if (!intent.hasExtra(EXTRA_FAB_COLOR) || !intent.hasExtra(EXTRA_FAB_ICON_RES_ID)) {
        return false;
    }

    final int color = intent.getIntExtra(EXTRA_FAB_COLOR, Color.TRANSPARENT);
    final int icon = intent.getIntExtra(EXTRA_FAB_ICON_RES_ID, -1);
    final FabTransform sharedEnter = new FabTransform(color, icon);
    if (target != null) {
        sharedEnter.addTarget(target);
    }
    activity.getWindow().setSharedElementEnterTransition(sharedEnter);
    return true;
}
 

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.readability);
    getActionBar().setDisplayHomeAsUpEnabled(true);

    progressBar = (ProgressBar) findViewById(R.id.readability_progress);
    webView = (WebView) findViewById(R.id.readability_webview);
    emptyView = (TextView) findViewById(R.id.readability_empty);
    showLoadStart();

    sp = PreferenceManager.getDefaultSharedPreferences(this);
    int color = sp.getInt(getString(R.string.sp_readability_background), getResources().getColor(R.color.white));
    findViewById(R.id.readability_frame).setBackgroundColor(color);

    String token = sp.getString(getString(R.string.sp_readability_token), null);
    Intent intent = getIntent();
    if (intent == null || !intent.hasExtra(IntentUnit.URL) || token == null || token.trim().isEmpty()) {
        showLoadError();
    } else {
        String url = intent.getStringExtra(IntentUnit.URL);
        query = REQUEST.replace(REQUEST_URL, url).replace(REQUEST_TOKEN, token);
        new ReadabilityTask(this, query).execute();
    }
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    overridePendingTransition(R.anim.slide_in_right, 0);
    Intent intent = getIntent();
    if (intent != null && intent.hasExtra(BitherSetting.INTENT_REF.MARKET_INTENT)) {
        marketType = (MarketType) intent.getSerializableExtra(BitherSetting.INTENT_REF
                .MARKET_INTENT);
    }
    boolean isFromNotif = false;
    if (intent != null && intent.hasExtra(BitherSetting.INTENT_REF.INTENT_FROM_NOTIF)) {
        isFromNotif = intent.getBooleanExtra(BitherSetting.INTENT_REF.INTENT_FROM_NOTIF, false);
    }

    if (marketType == null) {
        finish();
    } else {
        setContentView(R.layout.activity_market_detail);
        initView();
        if (isFromNotif && BitherApplication.hotActivity != null) {
            chartKline.postDelayed(new Runnable() {
                @Override
                public void run() {
                    if (BitherApplication.hotActivity != null) {
                        BitherApplication.hotActivity.notifPriceAlert(marketType);
                    }
                }
            }, 500);

        }
    }
}
 

@Override
public void onBroadcastReceived(Context context, Intent intent) {
    super.onBroadcastReceived(context, intent);

    if (intent.getAction().equals(GravityBoxSettings.ACTION_PREF_QUICKSETTINGS_CHANGED)) {
        if (intent.hasExtra(GravityBoxSettings.EXTRA_QR_QUALITY)) {
            mAudioQuality = intent.getIntExtra(GravityBoxSettings.EXTRA_QR_QUALITY,
                    RecordingService.DEFAULT_SAMPLING_RATE);
        }
        if (intent.hasExtra(GravityBoxSettings.EXTRA_QR_AUTOSTOP)) {
            mAutoStopDelay = intent.getIntExtra(GravityBoxSettings.EXTRA_QR_AUTOSTOP, 1) * 3600000;
        }
    }
}
 

@Override
public ComponentName startService(Intent service) {
    mIntentsReceived.add(service);
    if (service.hasExtra("android.support.content.wakelockid")) {
        return null;
    } else {
        return new ComponentName("mock.package.name", "MockClassName");
    }
}
 

@Override
public final void onReceive(Context context, Intent intent) {
    if (intent.hasExtra(EXTRA_EVENT_ID)) {
        Bundle params = intent.getExtras();
        String targetReceiverId = params.getString(EXTRA_RECEIVER_ID);

        if (targetReceiverId == null || targetReceiverId.equals(mReceiverId)) {
            mListener.onEvent(params.getInt(EXTRA_EVENT_ID), params, targetReceiverId == null);
        }
    }
}
 

protected void filterIntent() {
    Intent intent = getIntent();
    if (intent != null) {
        if (intent.hasExtra(TradeInfo.TRADE_KEY)) {
            this.mTradeInfo = this.mTradeManager.getTradeInfo(intent.getStringExtra(TradeInfo.TRADE_KEY));
        }
        if (intent.hasExtra("state")) {
            this.mState = intent.getIntExtra("state", 0);
        }
        if (this.mState == 0) {
            LOG.logI("Activity Leak of Status");
        }
    }
}
 

@Override
protected void onHandleIntent(Intent intent) {
    Log.d(TAG, "onHandleIntent: start process video service");

    DatabasePatrol db = DatabasePatrol.get(this);

    // add new video to db if need
    if (intent.hasExtra(VideoCaptureActivity.MOVIES_TO_SAVE)) {
        addVideo(intent);
    }

    //delete video
    else if (intent.hasExtra(DELETE_MOVIE)) {
        deleteVideo(intent);
    }

    //process all videos
    else {
        ArrayList<VideoItem> videoItems = db.getVideos(
                VideoItem.State.SAVING,
                ProjectPreferencesManager.getUser(this));

        if (!videoItems.isEmpty()) {
            for (VideoItem item : videoItems) {
                tryToProcessVideo(item, db);
            }
        }
    }

    // start auto upload service if need
    if (ProjectPreferencesManager.getAutoUploadMode(getApplicationContext())) {
        startService(new Intent(VideoProcessingService.this, UploadService.class));
    }
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_html_viewer);

    Toolbar toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    if (getSupportActionBar() != null) {
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }

    mWebView = findViewById(R.id.webview);
    mLoading = findViewById(R.id.loading);

    mWebView.setWebChromeClient(new ChromeClient());
    mWebView.setWebViewClient(new ViewClient());

    WebSettings s = mWebView.getSettings();
    s.setUseWideViewPort(true);
    s.setSupportZoom(true);
    s.setBuiltInZoomControls(true);
    s.setDisplayZoomControls(false);
    s.setSavePassword(false);
    s.setSaveFormData(false);
    s.setBlockNetworkLoads(true);

    // Javascript is purposely disabled, so that nothing can be
    // automatically run.
    s.setJavaScriptEnabled(false);
    s.setDefaultTextEncodingName("utf-8");

    final Intent intent = getIntent();
    if (intent.hasExtra(Intent.EXTRA_TITLE)) {
        setTitle(intent.getStringExtra(Intent.EXTRA_TITLE));
    }

    mWebView.loadUrl(String.valueOf(intent.getData()));
}
 

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  setContentView(R.layout.label_manager_labels);

  final Intent intent = getIntent();
  if (!intent.hasExtra(EXTRA_PACKAGE_NAME)) {
    throw new IllegalArgumentException("Intent missing package name extra.");
  }

  packageName = intent.getStringExtra(EXTRA_PACKAGE_NAME);

  final PackageManager packageManager = getPackageManager();
  CharSequence applicationLabel;
  Drawable packageIcon;
  try {
    packageIcon = packageManager.getApplicationIcon(packageName);
    final PackageInfo packageInfo = packageManager.getPackageInfo(packageName, 0);
    applicationLabel = packageManager.getApplicationLabel(packageInfo.applicationInfo);
  } catch (NameNotFoundException e) {
    LogUtils.i(TAG, "Could not load package info for package %s.", packageName);

    packageIcon = packageManager.getDefaultActivityIcon();
    applicationLabel = packageName;
  }

  setTitle(getString(R.string.label_manager_package_title, applicationLabel));

  final ActionBar actionBar = getSupportActionBar();
  actionBar.setIcon(packageIcon);
  actionBar.setDisplayHomeAsUpEnabled(true);

  labelList = (ListView) findViewById(R.id.label_list);
  labelProviderClient = new LabelProviderClient(this, LabelProvider.AUTHORITY);
}
 

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    super.onStartCommand(intent, flags, startId);

    if (intent != null && intent.hasExtra(KEY_ACTION)) {
        switch (intent.getIntExtra(KEY_ACTION, 0)) {
            case ACTION_PLAY_PAUSE:
                playPause();
                break;

            case ACTION_PREVIOUS:
                playPreviousTrackInQueue();
                break;

            case ACTION_NEXT:
                playNextTrackInQueue();
                break;

            case ACTION_DISMISS:
                mediaPlayer.stop();
                notificationManager.destroyNotification();

                for (MusicServiceListener listener : listeners) {
                    listener.onFinishRequested();
                }

                stopSelf();
                break;

            case ACTION_OPEN_ACTIVITY:
                if (listeners.size() == 0) {
                    Intent mainActivityIntent = new Intent(this, MainActivity.class);
                    mainActivityIntent.putExtra(MainActivity.KEY_INITIAL_FRAGMENT, MainActivity.FRAG_NOW_PLAYING);
                    mainActivityIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
                    startActivity(mainActivityIntent);
                }
                break;

            case ACTION_ADD:
                final VKApiAudio audio = currentAudio.get();
                VKApi.audio().add(VKParameters.from("audio_id", audio.id, "owner_id", audio.owner_id)).executeWithListener(new VKRequest.VKRequestListener() {
                    @Override
                    public void onComplete(VKResponse response) {
                        notificationManager.showAddCompleteIndicator();
                    }
                });
                break;
        }
    }

    return START_STICKY;
}
 

public static int getPosition(int resultCode, Intent data) {
    if (resultCode == RESULT_OK && data != null && data.hasExtra(EXTRA_POSITION)) {
        return data.getIntExtra(EXTRA_POSITION, EXTRA_NOT_FOUND);
    }
    return EXTRA_NOT_FOUND;
}
 

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    String action = intent != null ? intent.getAction() : null;

    if (!DNDModeChecker.isDNDPermissionGranted(this) && !STOP_ACTION.equals(action)) {
        Toast.makeText(this, getString(R.string.dnd_permission_title), Toast.LENGTH_LONG).show();
        return super.onStartCommand(intent, flags, startId);
    }

    if (APPLY_PROFILE_ACTION.equals(action)) {
        try {
            SoundProfile profile = soundProfileStorage.loadById(intent.getIntExtra(PROFILE_ID, -1));
            ProfileApplier.applyProfile(control, profile);
        } catch (JSONException e) {
            e.printStackTrace();
        }
        registerListeners(profilesToShow);
        startForeground();
        return super.onStartCommand(intent, flags, startId);
    } else if (STOP_ACTION.equals(action)) {
        stopForeground(true);
        notificationManagerCompat.cancel(
                staticNotificationNumber
        );
        stop(startId);
        isForeground = false;
        return super.onStartCommand(intent, flags, startId);
    } else if (CHANGE_VOLUME_ACTION.equals(action)) {
        int type = intent.getIntExtra(EXTRA_TYPE, 0);
        if (intent.hasExtra(EXTRA_VOLUME)) {
            int volume = intent.getIntExtra(EXTRA_VOLUME, 0);
            control.setVolumeLevel(type, volume);
        } else {
            float delta = intent.getFloatExtra(EXTRA_VOLUME_DELTA, 0);
            int currentVolume = control.getLevel(type);
            int nextVolume = (int) (delta > 0 ? Math.ceil(currentVolume + delta) : Math.floor(currentVolume + delta));
            control.setVolumeLevel(type, nextVolume);
        }
        registerListeners(profilesToShow);
        startForeground();
        return START_STICKY;
    } else if (FOREGROUND_ACTION.equals(action)) {
        createStaticNotificationChannel();
        showProfiles = intent.getBooleanExtra(EXTRA_SHOW_PROFILES, true);
        profilesToShow = (List<Integer>) intent.getSerializableExtra(EXTRA_VOLUME_TYPES_IDS);
        registerListeners(profilesToShow);
        startForeground();
        return START_NOT_STICKY;
    } else {
        return super.onStartCommand(intent, flags, startId);
    }
}