how to open WifiDisplay Setting from another app?

问题

I want to open Android4.2 setting WifiDisplaySettingsActivity from my app.

I tried

        Intent i;
        PackageManager manager = getActivity().getPackageManager();
        try {
            i = manager.getLaunchIntentForPackage("com.android.settings.wfd");
            if (i == null)
                throw new PackageManager.NameNotFoundException();
            i.addCategory(Intent.ACTION_MAIN);
            startActivity(i);
        } catch (PackageManager.NameNotFoundException e) {

        }

and

    final Intent intent = new Intent(Intent.ACTION_MAIN, null);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);
    final ComponentName cn = new ComponentName("com.android.settings.wfd","com.android.settings.wfd.WifiDisplaySettings");
    intent.setComponent(cn);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);

but none of them could work. I went to the AndroidManifest.xml to see code

        <activity android:name="Settings$WifiDisplaySettingsActivity"
            android:label="@string/wifi_display_settings_title"
            android:taskAffinity=""
            android:excludeFromRecents="true">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <action android:name="android.settings.WIFI_DISPLAY_SETTINGS" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
        <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
            android:value="com.android.settings.wfd.WifiDisplaySettings" />
    </activity>

the question is I know it's a fragment class and I know it's package name is com.android.settings.wfd, but I still don't know how to open it, especially I don't know how to handle activity name like this

Settings$WifiDisplaySettingsActivity

Can some one give me advices???plz....thank you very much

the problem is it's settings.WIFI_DISPLAY_SETTINGS but not ACTION_WIFI_SETTINGS, so the eclipse can't compile

addional:

public final class WifiDisplaySettings extends SettingsPreferenceFragment implements PersistentGroupInfoListener {
private static final String TAG = "WifiDisplaySettings";

private static final int MENU_ID_SCAN = Menu.FIRST;
private static final int MENU_ID_CREATE_GROUP = Menu.FIRST + 1;
private static final int MENU_ID_REMOVE_GROUP = Menu.FIRST + 2;

it's Setting Preference Fragment ... so how do I open it???

回答1:

Wireless Display Settings activity can be called through the Intent "android.settings.WIFI_DISPLAY_SETTINGS". Some OEMs use other intents

Samsung: "com.samsung.wfd.LAUNCH_WFD_PICKER_DLG"

HTC: "com.htc.wifidisplay.CONFIGURE_MODE_NORMAL"

so, not guaranteed to work.

I dealt with the same issue and ended up with the following code.

try {
  Log.d("TAG", "open WiFi display settings in HTC");
  godController.getActivity().startActivity(new 
             Intent("com.htc.wifidisplay.CONFIGURE_MODE_NORMAL"));
} catch (Exception e) {
  try {
    Log.d("TAG", "open WiFi display settings in Samsung");
    godController.getActivity().startActivity(new 
              Intent("com.samsung.wfd.LAUNCH_WFD_PICKER_DLG"));
  } catch (Exception e2) {
    Log.d("TAG", "open WiFi display settings in stock Android");
    godController.getActivity().startActivity(new 
               Intent("android.settings.WIFI_DISPLAY_SETTINGS"));
  }
}

Please let me know if it can be better implemented.

回答2:

startActivity(new Intent("android.settings.WIFI_DISPLAY_SETTINGS"));

回答3:

Use this

ConnectivityManager manager = (ConnectivityManager) 
        getSystemService(MainActivity.CONNECTIVITY_SERVICE);
/*
 * 3G confirm
 */
Boolean is3g = manager.getNetworkInfo(
        ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();
/*
 * wifi confirm
 */
Boolean isWifi = manager.getNetworkInfo(
        ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting();
if (is3g) {
    textView.setText("3G");
} else if (isWifi) {
    textView.setText("wifi");
} else {
    textView.setText("nothing");
    // Activity transfer to wifi settings
    startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));
} 

This may help you

回答4:

Use

startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));

Or

public void openWifiSettings(){

        final Intent intent = new Intent(Intent.ACTION_MAIN, null);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        final ComponentName cn = new ComponentName("com.android.settings", "com.android.settings.wifi.WifiSettings");
        intent.setComponent(cn);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity( intent);
    }

来源：https://stackoverflow.com/questions/18077556/how-to-open-wifidisplay-setting-from-another-app