Java Code Examples for android.app.Activity#startActivity()

/**
 * Opens the given URL in an alternative browser
 *
 * @param context a valid `Activity` reference
 * @param url the URL to open
 * @param withoutTransition whether to switch to the browser `Activity` without a transition
 */
public static void openUrl(final Activity context, final String url, final boolean withoutTransition) {
	final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
	intent.setPackage(getAlternative(context));
	intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

	context.startActivity(intent);

	if (withoutTransition) {
		context.overridePendingTransition(0, 0);
	}
}
 

public static void startForwardActivity(Activity context, Class<?> forwardActivity, Bundle bundle, Boolean isFinish, int animin, int animout) {
    Intent intent = new Intent(context, forwardActivity);
    //intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    if (bundle != null)
        intent.putExtras(bundle);
    context.startActivity(intent);
    if (isFinish) {
        context.finish();
    }
    try {
        context.overridePendingTransition(animin, animout);
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

private static void goToAppStore(final Activity activity) {
    SupportedAppStore appStore = SupportedAppStore.fromDeviceManufacturer();
    String appStoreUri = appStore.getAppStoreUri();
    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(appStoreUri));
    try {
        activity.startActivity(intent);
    } catch (android.content.ActivityNotFoundException e) {
        //should not happen
    }
}
 

/**
 * Moves the app to the foreground.
 */
private void moveToForeground()
{
    Activity  app = getApp();
    Intent intent = getLaunchIntent();

    intent.addFlags(
            Intent.FLAG_ACTIVITY_REORDER_TO_FRONT |
            Intent.FLAG_ACTIVITY_SINGLE_TOP |
            Intent.FLAG_ACTIVITY_CLEAR_TOP);

    clearScreenAndKeyguardFlags();
    app.startActivity(intent);
}
 

public static void restartCurrentActivity() {
    final Activity top = getTopActivity();
    if(top instanceof Activity) {
        final Activity ac = (Activity)top;
        Intent i = ac.getIntent();
        boolean rst = false;
        Log.i(TAG, "activity " + ac.getComponentName() + " has singleTask:" + rst);
        i.addFlags(65536);
        ac.overridePendingTransition(0, 0);
        ac.startActivity(i);
        (new Handler(Looper.getMainLooper())).postDelayed(new Runnable() {
            public void run() {
                Log.e(TAG, "first task id " + sFirstTaskId + " top actvitiy id " + ac.getTaskId());
                Activity a = getTopActivity();
                Log.e(TAG, "last top: " + top + " now top :" + a + " activity size :" + getAllActivities().length);
                if (a == ac) {
                    ac.recreate();
                    Log.d(TAG, "restart :" + ac.getComponentName());
                } else {
                    ac.finish();
                    ac.overridePendingTransition(0, 0);
                    Log.d(TAG, "finish :" + ac.getComponentName());
                }

            }
        }, 200L);
    }

}
 

/**
 * 打开用户话题列表界面。
 * 
 * @param activity
 * @param uid 用户uid
 */
public static void openUserTrends(Activity activity,String uid){
    if(activity==null){
        return;
    }
    Intent intent=new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    intent.addCategory("android.intent.category.DEFAULT");
    intent.setData(Uri.parse("sinaweibo://usertrends?uid="+uid));
    activity.startActivity(intent);
}
 

/**
 * Restarts the given `Activity`
 *
 * @param activity the `Activity` instance to restart (e.g. `MyActivity.this`)
 */
public static void restartActivity(final Activity activity) {
	final Intent restart = new Intent(activity, activity.getClass());
	restart.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);

	activity.finish();
	activity.overridePendingTransition(0, 0);
	activity.startActivity(restart);
	activity.overridePendingTransition(0, 0);
}
 

public static void start(Activity activity, View view, String elementName, MainActivity.User user) {
    Intent intent = new Intent(activity, CallActivity.class);
    intent.putExtra(EXTRA_ELEMENT_ID, elementName);
    intent.putExtra(EXTRA_USER, user);
    ActivityOptionsCompat options = ActivityOptionsCompat.makeSceneTransitionAnimation(activity, view, elementName);
    activity.startActivity(intent, options.toBundle());
}
 

@Override
public
boolean onContextItemSelected(MenuItem item)
{
    // Get the feed url from the FeedItem.
    AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
    FeedItem feedItem = ((ViewFeedItem) info.targetView).m_item;
    String url = feedItem.m_url;

    Activity activity = getActivity();

    switch(item.getItemId())
    {
        case R.id.copy:
            ClipboardManager clipboard = (ClipboardManager) activity.getSystemService(Context.CLIPBOARD_SERVICE);
            clipboard.setPrimaryClip(ClipData.newPlainText("Url", url));

            Toast toast = Toast.makeText(activity, getString(R.string.toast_url_copied) + ' ' + url, Toast.LENGTH_SHORT);
            toast.show();
            return true;

        case R.id.open:
            activity.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
            return true;

        case R.id.favourite:
            addToFavourites(activity, feedItem);
            return true;

        case R.id.save_image:
            downloadImage(activity, feedItem.m_imageLink, feedItem.m_imageName);

        default:
            return false;
    }
}
 

public static void startTopicActivity(Activity a, Topic t, Category c, String url) {
    L.i("topic category: %s", t.category);
    Intent intent = new Intent(a, TopicActivity.class);
    intent.putExtra(Utils.EXTRA_OBJ, t);
    intent.putExtra(Utils.EXTRA_OBJ_C, c);
    intent.putExtra(Utils.EXTRA_ID, t.id.longValue());
    intent.putExtra(Utils.EXTRA_TITLE, t.title);
    intent.putExtra(Utils.EXTRA_SLUG, t.slug);
    intent.putExtra(Utils.EXTRA_URL, url);
    intent.putExtra(Utils.EXTRA_NUMBER, t.last_read_post_number);
    a.startActivity(intent);
}
 

/**
 * Go to comic detail screen.
 *
 * @param activity Activity from.
 * @param comicId  int identifier of the comic which will be loaded.
 */
public void goToDetail(Activity activity, int comicId) {
    if (activity != null) {
        Intent intentToLaunch = ComicDetailActivity.getCallingIntent(activity, comicId);
        activity.startActivity(intentToLaunch);
    }
}
 

public static void goToGenre(@NonNull final Activity activity, final Genre genre, @Nullable Pair... sharedElements) {
    final Intent intent = new Intent(activity, GenreDetailActivity.class);
    intent.putExtra(GenreDetailActivity.EXTRA_GENRE, genre);

    activity.startActivity(intent);
}
 

@Override public void startActivity(@NonNull Activity aty, @NonNull Intent it) {
    aty.startActivity(it);
}
 

public static void activityStart(Activity activity) {
    Intent intent = new Intent(activity, MainActivity.class);
    activity.startActivity(intent);
}
 

public static void openActivity(Activity activity){
    activity.startActivity(new Intent(activity,PullToRefreshListViewSimpleActivity.class));
}
 

public static void show(@NonNull Activity activity, @NonNull String owner, @NonNull String repo){
    Intent intent = new Intent(activity, LabelManageActivity.class);
    intent.putExtras(BundleHelper.builder().put("owner", owner).put("repo", repo).build());
    activity.startActivity(intent);
}
 

/**
 * Notify the host application a download should be done, or that the data
 * should be streamed if a streaming viewer is available.
 *
 * @param context            The context in which the download was requested.
 * @param url                The full url to the content that should be downloaded
 * @param userAgent          User agent of the downloading application.
 * @param contentDisposition Content-disposition http header, if present.
 * @param mimetype           The mimetype of the content reported by the server
 * @param contentSize        The size of the content
 */
public void onDownloadStart(@NonNull Activity context, @NonNull PreferenceManager manager, String url, String userAgent,
                            @Nullable String contentDisposition, String mimetype, String contentSize) {

    Log.d(TAG, "DOWNLOAD: Trying to download from URL: " + url);
    Log.d(TAG, "DOWNLOAD: Content disposition: " + contentDisposition);
    Log.d(TAG, "DOWNLOAD: Mimetype: " + mimetype);
    Log.d(TAG, "DOWNLOAD: User agent: " + userAgent);

    // if we're dealing wih A/V content that's not explicitly marked
    // for download, check if it's streamable.
    if (contentDisposition == null
        || !contentDisposition.regionMatches(true, 0, "attachment", 0, 10)) {
        // query the package manager to see if there's a registered handler
        // that matches.
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.parse(url), mimetype);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.addCategory(Intent.CATEGORY_BROWSABLE);
        intent.setComponent(null);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
            intent.setSelector(null);
        }
        ResolveInfo info = context.getPackageManager().resolveActivity(intent,
            PackageManager.MATCH_DEFAULT_ONLY);
        if (info != null) {
            // If we resolved to ourselves, we don't want to attempt to
            // load the url only to try and download it again.
            if (BuildConfig.APPLICATION_ID.equals(info.activityInfo.packageName)
                || MainActivity.class.getName().equals(info.activityInfo.name)) {
                // someone (other than us) knows how to handle this mime
                // type with this scheme, don't download.
                try {
                    context.startActivity(intent);
                    return;
                } catch (ActivityNotFoundException ex) {
                    // Best behavior is to fall back to a download in this
                    // case
                }
            }
        }
    }
    onDownloadStartNoStream(context, manager, url, userAgent, contentDisposition, mimetype, contentSize);
}
 

public static void openUrl(Activity activity, String url){
    Intent i = new Intent(Intent.ACTION_VIEW);
    i.setData(Uri.parse(url));
    activity.startActivity(i);
}
 

public static void launch(Activity activity, EdictEntry entry) {
	final Intent intent = new Intent(activity, VerbInflectionActivity.class);
	intent.putExtra(VerbInflectionActivity.INTENTKEY_ENTRY, entry);
	activity.startActivity(intent);
}
 

/**
 * 跳转界面 3
 *
 * @param activity
 * @param homeActivityClass
 */
public static void startActivity(Activity activity, Class homeActivityClass) {
    Intent intent = new Intent(activity.getApplicationContext(), homeActivityClass);
    activity.startActivity(intent);
}