I wrote this code to open a website in the browser from my app in android studio(google):
String google = "http://www.google.com";
Uri webAddress = Uri.parse(google);
Intent goToGoogle= new Intent(Intent.ACTION_VIEW, webAddress);
if(goToGoogle.resolveActivity(getPackageManager()) != null) {
startActivity(goToGoogle);
}
the app just does what I want it to do when I do not put the if statement, otherwise the button does nothing. Why is that?
thanks
The resolveActivity() method returns the Activity Component that is used to handle the Intent, so, if there is an Activity handling the intent, it will return true
Make sure that an Activity is handling your intent, placing this code into a java class of an Activity.
String google = "http://www.google.com";
Uri webAddress = Uri.parse(google);
Intent goToGoogle= new Intent(Intent.ACTION_VIEW);
goToGoogle.setData(webAdress);
if(goToGoogle.resolveActivity(getPackageManager()) != null) {
startActivity(goToGoogle);
}
Related
My app contains a simple Fragment that is used to open external web pages, with:
Intent intent = new Intent(Intent.ACTION_VIEW, externalUrl); // Uri
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
Intent chooserIntent = Intent.createChooser(intent, "Open URL...");
startActivityForResult(chooserIntent, RC_OPEN_URL);
And, when the result is returned (in my Fragment's onActivityResult(...)), the Fragment is popped off the backstack.
But, I'm now getting the new deprecation warning:
startActivityForResult(Intent,int) in Fragment has been deprecated
I've read the corresponding Getting a result from an activity documentation, but I'm not sure how to adapt the example they provide for my particular case.
I have discovered the ActivityResultContracts.StartActivityForResult class, but can't figure out how to pass my chooserIntent to it.
All the online examples for the class seem to be in Kotlin and I've not had any joy trying to decompile them to Java. So a Java example of how to use the new registerForActivityResult() method to open an external URL would be much appreciated.
There's no reason to use startActivityForResult() at all for createChooser() - you can use startActivity and run your code from onActivityResult() immediately after you call to startActivity:
Intent intent = new Intent(Intent.ACTION_VIEW, externalUrl); // Uri
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
Intent chooserIntent = Intent.createChooser(intent, "Open URL...");
startActivity(chooserIntent);
// Do your code from onActivityResult() here
However, if you really want to use the Activity Result API, then you can directly adapt the examples in the documentation, replacing the example GetContent contract with the StartActivityForResult contract:
// Create this as a variable in your Fragment class
ActivityResultLauncher<Intent> mLauncher = registerForActivityResult(
new StartActivityForResult(),
new ActivityResultCallback<ActivityResult>() {
#Override
public void onActivityResult(ActivityResult result) {
// Do your code from onActivityResult
}
});
private void triggerChooser(Uri externalUri) {
Intent intent = new Intent(Intent.ACTION_VIEW, externalUrl); // Uri
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
Intent chooserIntent = Intent.createChooser(intent, "Open URL...");
mLauncher.launch(chooserIntent);
}
Below answer may help to someone.... But this is not readymade solution to above question.
I have faced lot of issue when I try to get result from activity to fragment.
Finally I found below solution.
In side the fragment, I created ActivityResultLauncher.
var myActivityResultLauncher: ActivityResultLauncher<Intent> = registerForActivityResult<Intent, ActivityResult>(
ActivityResultContracts.StartActivityForResult(),
ActivityResultCallback<ActivityResult> {
// ToDO:
if (it.resultCode == AppCompatActivity.RESULT_OK) {
}
}
) as ActivityResultLauncher<Intent>
And when I start the activity I used below code.
myActivityResultLauncher.launch(myIntent)
I'm coding an android - java app which can open a Facebook post url
(ex: https://www.facebook.com/BaHangXom.0/videos/2377836809193490).
I tried some ways to start Facebook app with intent but unsuccessfully.
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("fb://facewebmodal/f?href=" + "https://www.facebook.com/BaHangXom.0/videos/2377836809193490"));
intent.setPackage("com.facebook.katana");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
Could you please give me any idea?
Thank you so much.
Simply open the url:
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://www.facebook.com/BaHangXom.0/videos/2377836809193490"));
startActivity(intent);
This is the most simple and universal way: user will be able to choose (and remember the choice) whether they want to open the link via main Facebook app, Facebook lite, or the browser.
You can open the facebook app using this code:
public static Intent newFacebookIntent(PackageManager pm, String url) {
Uri uri = Uri.parse(url);
try {
ApplicationInfo applicationInfo = pm.getApplicationInfo("com.facebook.katana", 0);
if (applicationInfo.enabled) {
// http://stackoverflow.com/a/24547437/1048340
uri = Uri.parse("fb://facewebmodal/f?href=" + url);
}
} catch (PackageManager.NameNotFoundException ignored) {
}
return new Intent(Intent.ACTION_VIEW, uri);
}
I need to open Telegram from my own Android App prepopulating both the message and recipient (and not having to choose betwenn Chrome or Telegram),
I achieved the first one with this code:
final String appName = "org.telegram.messenger";
Intent tIntent = new Intent(Intent.ACTION_SEND);
tIntent.setType("text/plain");
tIntent.setPackage(appName);
tIntent.putExtra(Intent.EXTRA_TEXT, msg);
mUIActivity.startActivity(tIntent);
And the second one with this code:
Intent tIntent = new Intent(Intent.ACTION_VIEW);
tIntent.setData(Uri.parse("http://telegram.me/USERID"));
startActivity(tIntent);
(I removed all checks like isTelegramInstalled for simplicity)
I tried to mix the two methods
adding some intent extra such as msg we get to this code that will open Telegram, in one click, with pre-populated message and recipient:
Intent telegramIntent = new Intent(Intent.ACTION_SEND);
tIntent.setDataAndType(Uri.parse("http://telegram.me/username"), "text/plain");
final String appName = "org.telegram.messenger";
tIntent.setPackage(appName);
tIntent.putExtra(Intent.EXTRA_TEXT, "hello");
startActivity(tIntent);
...aaand it didn't work!
android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.SEND dat=http://telegram.me/... flg=0x1 pkg=org.telegram.messenger clip={null T:hello} (has extras) }
Any idea how to achieve this?
Please try below function for open Telegram
public static void openTelegram(Activity activity, String userName) {
Intent general = new Intent(Intent.ACTION_VIEW, Uri.parse("https://t.com/" + userName));
HashSet<String> generalResolvers = new HashSet<>();
List<ResolveInfo> generalResolveInfo = activity.getPackageManager().queryIntentActivities(general, 0);
for (ResolveInfo info : generalResolveInfo) {
if (info.activityInfo.packageName != null) {
generalResolvers.add(info.activityInfo.packageName);
}
}
Intent telegram = new Intent(Intent.ACTION_VIEW, Uri.parse("https://t.me/" + userName));
int goodResolver = 0;
// gets the list of intents that can be loaded.
List<ResolveInfo> resInfo = activity.getPackageManager().queryIntentActivities(telegram, 0);
if (!resInfo.isEmpty()) {
for (ResolveInfo info : resInfo) {
if (info.activityInfo.packageName != null && !generalResolvers.contains(info.activityInfo.packageName)) {
goodResolver++;
telegram.setPackage(info.activityInfo.packageName);
}
}
}
//TODO: if there are several good resolvers create custom chooser
if (goodResolver != 1) {
telegram.setPackage(null);
}
if (telegram.resolveActivity(activity.getPackageManager()) != null) {
activity.startActivity(telegram);
}
}
I hope this can help You!
Thank You.
In your case
android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.SEND dat=http://telegram.me/... flg=0x1 pkg=org.telegram.messenger clip={null T:hello} (has extras) }
Telegram chat activity class has a different name and you pass other activity name.
Find which class use telegram for chat activity and pass it on set package method
I'm trying to use startActivityForResult() to get a String from another activity, but I keep getting a NullPointerException whenever I try to retrieve the String from the Intent. Here's what I've got:
//To set up the Intent:
String in = mEditText.getText().toString(); //medittext is EditText that I want String from
Intent i = new Intent(this, ActivityLoaderActivity.class); //activity that started this one
i.putExtra("message", in);
setResult(1);
this.finish(); //cause I'm using startActivityForResult()
//To get the String
#Override
protected void onActivityResult( ... , Intent data) {
String s = data.getStringExtra("message"); //error here
}
I know the error is at getStringExtra() through debugging, but I still can't figure out why it's crashing. Anyone have any ideas?
Maybe you could try using setResult(1, i) and checking in onActivityResult() for the resultCode before getting the extra like this
if(resultCode == 1)
{
//get String extra
}
Hope it helps
I am learning android and curious to know as if startActivityForResult() contains the properties of startActivity() too, i.e. can it be used to send data like startActivity() beside receiving data from called activity?
Here is the code:
SendData Activity:
Intent data= new Intent(SendData.this, RecieveData.class);
Bundle check = new Bundle();
check.putString("UmerData", cheese);
medt.setText(cheese);
data.putExtras(check);
startActivityForResult(data, 5);
Should receive data in this activity (RecieveData Activity)
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.recievedata);
Initializek();
Bundle got = getIntent().getExtras();
String ss= got.getString("UmerData");
if(getIntent()!=null && ss!=null ) {
rt1.setText("Is not Null");
}
}
Your help will be really appreciated !
Thanks
Yes, startActivity & startActivityForResult, both take intent as param. You can bundle launch data inside intent and pass it over to target activity.
When you use startActivityForResult(), you have to also create a onActivityResult() method within the Activity that called startActivityForResult(). onActivityResult() is where you can access the Intent stored by the Activity you start for a result.
In the Activity that is then started, you have to call setResult() to store the Intent that you store the data in.
Read over this: http://developer.android.com/reference/android/app/Activity.html#StartingActivities
edit: Misread your question. For passing a Bundle of options through, I would use this overload:
startActivity(Intent, int, Bundle)
I'm working in Xamarin Android so the code is C# but I had the same problem except I'm sending between separate apps. I eventually got it working so here is my example.
var intent = new Intent();
intent.SetComponent(new ComponentName("com.company.packageName", "com.company.packageName.activityName"));
intent.PutExtra(Intent.ExtraText, message);
StartActivityForResult(intent, 1);
// in app being started
protected override void OnResume()
{
base.OnResume();
Intent intent = Intent; // Equivalent to getIntent()
if (intent != null)
{
string str = intent.GetStringExtra(Intent.ExtraText);
if (str != null)
{
// Do stuff with str
}
else
{
//Show Error
}
}
else
{
//Show Error
}
}