Android, Java, Implicit intents, Open webpage, Open map, Share text.

ImplicitIntents.java

/**
 * This method fires off an implicit Intent to open a webpage.
 *
 * @param url Url of webpage to open. Should start with http:// or https:// as that is the
 *            scheme of the URI expected with this Intent according to the Common Intents page
 */
private void openWebPage(String url) {
    Uri webpage = Uri.parse(url);
    Intent intent = new Intent(Intent.ACTION_VIEW, webpage);
    /*
     * This is a check we perform with every implicit Intent that we launch. In some cases,
     * the device where this code is running might not have an Activity to perform the action
     * with the data we've specified. Without this check, in those cases your app would crash.
     */
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    } else {
        Log.d(TAG, "Couldn't call " + webpage.toString()
              + ", no receiving apps installed!");
    }
}

/**
 * This method will fire off an implicit Intent to view a location on a map.
 *
 * When constructing implicit Intents, you can use either the setData method or specify the
 * URI as the second parameter of the Intent's constructor.
 *
 * @param addressString The string representing the location that will be opened in the map
 */
private void showMap(String addressString) {
    Uri.Builder builder = new Uri.Builder();
    builder.scheme("geo").appendQueryParameter("q", addressString);
    Uri addressUri = builder.build();
    // Uri addressUri = Uri.parse("geo:0,0?q=" + addressString);

    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setData(addressUri);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    } else {
        Log.d(TAG, "Couldn't call " + addressUri.toString()
              + ", no receiving apps installed!");
    }
}

/**
 * This method shares text and allows the user to select which app they would like to use to
 * share the text. The chooser that is started using the {@link IntentBuilder#startChooser()}
 * method will create a chooser when more than one app on the device can handle the Intent.
 * If only one Activity on the phone can handle the Intent, it will automatically be launched.
 *
 * @param textToShare Text that will be shared
 */
private void shareText(String textToShare) {
    ShareCompat.IntentBuilder
        .from(this)
        .setType("text/plain")
        .setChooserTitle("Learning How to Share")
        .setText(textToShare)
        .startChooser();
}