Here is my first activity code from where I call the second Activity:
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT){
startActivityForResult(new Intent("chap.two.Chapter2Activity2"),request_Code);
}
return false;
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == request_Code) {
if (resultCode == RESULT_OK)
Toast.makeText(this,data.getData().toString(),Toast.LENGTH_SHORT).show();
}
}
And here is a code of chap.two.Chapter2Activity2:
Button n = (Button) findViewById(R.id.btn_OK);
n.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent data = new Intent();
//---get the EditText view---
EditText txt_username =(EditText) findViewById(R.id.txt_username);
//---set the data to pass back---
data.setData(Uri.parse(txt_username.getText().toString()));
setResult(RESULT_OK, data);
//---closes the activity---
finish();
}
});
here I see that setResult(RESULT_OK, data) has two arguments but
onActivityResult(int requestCode, int resultCode, Intent data) has three and I want know how onActivityResult gets value for third parameter? How it works can anyone tell me? Why isn't this error ?
When you call Activity.startActivityForResult(), you set the requestCode. Later, this request code is needed by onActivityResult() in order to determine what Activity is sending data to it. We don't need to supply requestCode again on setResult() because the requestCode is carried along.
The data is intent data returned from launched intent. We usually use this data when we set extras on the called intent.
Consider this example:
CALL SECOND ACTIVITY
Intent i = new Intent(MainActivity.this, CheckActivity.class);
startActivityForResult(i, REQUEST_CODE_CHECK);
ON SECOND ACTIVITY, SET INTENT RESULT
getIntent().putExtra("TADA", "bla bla bla");
setResult(RESULT_OK, getIntent());
finish();
BACK TO FIRST ACTIVITY, ONACTIVITYRESULT()
if(requestCode == REQUEST_CODE_CHECK && resultCode == RESULT_OK){
text1.setText(data.getExtras().getString("TADA") );
}
There you go. You should now understand what is Intent data and how to set and fetch the value.
Third parameter is Intent, which you sent from the sub-Activity(Second Activity, which is going to finish).
If you want to perform some calculations or fetch some username/password in sub-activity and you want to send the result to the main activity, then you place the data in the intent and will return to the Main activity before finish().
After that you will check in onActivityResult(int, int, Intent) in main activity for the result with Intent parameter.
Example::
MainActivity:
public void onClick(View view) {
Intent i = new Intent(this, subActivity.class);
startActivityForResult(i, REQUEST_CODE);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK && requestCode == REQUEST_CODE) {
if (data.hasExtra("username") && data.hasExtra("password")) {
String username = data.getExtras().getString("username");
String password = data.getExtras().getString("password");
}
}
subActivity::
#Override
public void finish() {
// Create one data intent
Intent data = new Intent();
data.putExtra("username", "Bla bla bla..");
data.putExtra("password", "*****");
setResult(RESULT_OK, data);
super.finish();
}
Related
In android studio I have two activities, Main and Settings.
The settings activity is called from main activity and there is a button for logging out. When I click on this button the settings activity finishes and the main activity appears again. How can I make the main activity know that the log out button was clicked?
And what if there is many actions that I can perform in settings activity?I don't want to return result to main activity, I want to write that actions somewhere and read from there in Main activity.
In the MainActivity you can start the SettingActivity using
Intent intent = new Intent(this, SettingActivity .class);
startActivityForResult(intent, yourRequestCode);
after that in SettingActivity when you click the button logout, parse the boolean using
Intent intent= new Intent();
intent.putExtra("isClicked", true); // save clicked data
setResult(Activity.RESULT_OK, intent);
finish();
then, in MainActivity you can call onActivityResult like this
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK && requestCode == yourRequestCode) {
Boolean isLogoutClicked = data.getExtras().getBoolean("isClicked");
}
now you get the data from the setting activity when the button logout is clicked.
in mainActivity
Intent intent = new Intent(this, SettingActivity .class);
startActivityForResult(intent, 123);
than
#Override
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
try {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 123 && resultCode == RESULT_OK)
{
String requiredValue = data.getStringExtra("key");
}
} catch (Exception ex) {
Toast.makeText(Activity.this, ex.toString(),
Toast.LENGTH_SHORT).show();
}
}
and set thus into your setting screen
Intent intent = getIntent();
intent.putExtra("key", value);
setResult(RESULT_OK, intent);
finish();
and check if value have data or anything you past that its come from setting screen
I have two activities. The second activity is called from the first using startActivityForResult(intent,request_code).
In the second activity I have this code:
Intent i = getIntent();
i.putExtra("data" , some data);
setResult(Activity.RESULT_OK,i);
finish();
Then, to get the data in the first activity I use this code:
#Override
protected void onActivityResult(int requestCode,int resultCode,Intent intent)
{
super.onActivityResult(requestCode, resultCode, data);
if (requestCode==this.uploadRequestCode && resultCode == Activity.RESULT_OK)
{
data = intent.get("data")
}
I start the activity this way:
Intent uploadIntent = new Intent(this,uploadActivity.class)
startActivityForResult(uploadIntent,this.uploadRequestCode)
The problem is that the result code I get is RESULT_CANCELLED even though I set RESULT_OK.
NOTE
I am not talking about a situation when back button is pressed.
UPDATE
I found out that the intent I get in onActivityResult() is null even though I sent an intent, that's why the result code was RESULT_CANCELLED.
Anyone knows why the intent is null?
Maybe this can help you out, something from a project that I have
This how I do start my activity
Intent intent = new Intent(FirstActivity.this, ActivityThatReturnInfo.class);
startActivityForResult(intent, 1);
This is from the activity that I want to return some value
Intent returnIntent = new Intent();
returnIntent.putExtra("VAR",someInfo);
setResult(Activity.RESULT_OK,returnIntent);
finish();
This is on the activity that as started the one that is waiting for the information
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
switch (requestCode)
{
case 1:
if(resultCode == Activity.RESULT_OK)
{
String result = data.getStringExtra("VAR");
// Code to do
}
break;
default:
IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
if(result != null)
{
if(result.getContents() != null)
{
// Code to do
}
}
break;
}
}
Starting SecondActivity from FirstActivity
Intent i = new Intent(this, SecondActivity.class);
startActivityForResult(i, 100);
Sending data to FirstActivity from SecondActivity
Intent intent= new Intent();
intent.putExtra("result",result);
setResult(RESULT_OK,intent);
finish();
getting result in FirstActivity
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == 100 && resultCode == Activity.RESULT_OK){
String result=data.getStringExtra("result");
Log.e("Result",result);
}
}
Edit:
Change your code to below and try once.
While sending intent from SecondActivity to FirstActivity Intent i = getIntent(); to Intent intent= new Intent();
I am facing a strange issue while returning to an Activity with a Result, I am passing an Intent for startActivityForResult from an Adapter like this :
Intent i = new Intent(activity, EditInfoActivity.class);
i.putExtra("id", list.get(position).getID());
activity.startActivityForResult(i, 100);
and in second Activity i.e. in EditInfoActivity in my case on a Button click I am setting Result for first activity like this:
Intent i = getIntent();
i.putExtra("isDataChange", isDataChange);
setResult(100, i);
finish();
In Activity's onActivityResult method I am able to get result code but getting Intent null.
Why? anybody have any idea on this please share.
in Activity:
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 100) {
//Here data is null and app crash
if (data.getExtras() != null && data.getBooleanExtra("isDataChange", false)) {
recreate();
}
}
}
First, you need to start the Activity with a REQUEST_CODE:
// Here we set a constant for the code.
private final int REQUEST_CODE = 100;
Intent i = new Intent(activity, EditInfoActivity.class);
i.putExtra("id", list.get(position).getID());
activity.startActivityForResult(i, REQUEST_CODE);
Then you need to send RESULT_OK when finishing EditInfoActivity:
Intent i = getIntent();
i.putExtra("isDataChange", isDataChange);
setResult(RESULT_OK, i);
finish();
Then handle the result on your first activity with this:
Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// REQUEST_CODE is defined as 100
if (resultCode == RESULT_OK && requestCode == 100) {
// do process
}
}
setResult TAKES RESULT_CODE instead of REQUEST_CODE.
Replace your code with this, May be it will solve your problem.
setResult(RESULT_OK, i);
And in yout onActivityResult
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
//Here data is null and app crash
if (data != null && data.getBooleanExtra("isDataChange", false)) {
recreate();
}
}
}
Two mistakes. You are passing the intent that was used to launch the activity you are finishing. Use new Intent() instead.
When setting activity result you should use result codes, not a request code setResult(RESULT_OK) alternatively RESULT_CANCELED and handle the response accordingly.
This question already has answers here:
How to manage startActivityForResult on Android
(14 answers)
Closed 8 years ago.
I am new to android development
I call an intent now how can i get result from called activity
can any one tell me how to perform this task ?
i have called intent like.
Intent I = new Intent (this ,abc.class);
startActivity(i);
thanks
Use startActivityForResult and then override onActivityResult in your FirstActivity.
In FirstActivity
Intent intent = new Intent(FirstActivity.this,SecondActivity.class);
startActivityForResult(intent, 2);// Activity is started with requestCode 2
Override onActivityResult
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
// check if the request code is same as what is passed here it is 2
if(requestCode==2)
{
String message=data.getStringExtra("MESSAGE");
Log.i("Message is",message);
// logs Testing
}
}
In SecondAcivity
Intent intent=new Intent();
intent.putExtra("MESSAGE","Testing");
setResult(2,intent);
finish();//finishing activity
Reference to the docs:
http://developer.android.com/reference/android/app/Activity.html#startActivityForResult(android.content.Intent, int)
Example:
http://www.javatpoint.com/android-startactivityforresult-example
For going to second activity use startActivityForResult in your firstclass
Intent callIntent = new Intent(FirstClass.this, SecondClass.class);
startActivityForResult(callIntent, 1);
then override onActivityResult method in your first class like this
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// Check which request we're responding to
if (requestCode == 1) {
// Make sure the request was successful
if (resultCode == RESULT_OK) {
// get values from data
}
} }
In your second class do this for returning back, if you want to send
something to first class. Store this in your intent.
Intent result = new Intent(); setResult(Activity.RESULT_OK, result);
finish();
hi you can get result calling activity
Start activity with startActivityForResult(intent, 0);
add below method in calling activity
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 0) {
if (resultCode == RESULT_OK) {
// do your task
} else if (resultCode == RESULT_CANCELED) {
// do your task
}
}
}
In your main Class....
static final int CODE_REQUEST = 1; // The request code
....
Intent pickContactIntent = new Intent(MainClass.this, CallingClassName.class);
startActivityForResult(pickContactIntent, CODE_REQUEST);
..........
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// Check which request we're responding to
if (requestCode == PICK_CONTACT_REQUEST) {
// Make sure the request was successful
if (resultCode == RESULT_OK) {
// The user picked a contact.
// The Intent's data Uri identifies which contact was selected.
// Do something with the contact here (bigger example below)
}
}
}
In your calling class
Intent result = new Intent();
setResult(Activity.RESULT_OK, result);
finish()
In my app I have a header with icon hidden, I have a adapter with a listview when I click the listview I go to a login screen using listener, when the login is successful is should come back to listview(adapter) and icon should get visible on header. i am sending intent as follows: http://pastebin.com/4SKnyjVX
below is onclick the login button
public void onClick(View v) {
String password = etPassword.getText().toString();
if(password.equals("guest")){
Intent returnIntent = new Intent();
returnIntent.putExtra("result",result);
setResult(1,returnIntent);
finish();
} else {
//----
}
finish();
}
how can i use onActivityResult to set a flag and use this flag in click listener,
and also use it to make the icon visible. Any suggestion is appreciated
You have to override onActivityResult(int requestCode, int resultCode, Intent resultIntent):
requestCode is the integer that you originally passed as the second parameter to startActivityForResult(). You should check this matches your original request, in case you have multiple requests you have to differentiate between.
resultCode and resultIntent is the integer and intent you pass to setResult() in your code above.
So your method should look something like:
#Override
public void onActivityResult(int requestCode, int resultCode, Intent resultIntent) {
if (requestCode == 1) { // original request
if (resultCode == 1) { // success
String result = resultIntent.getStringExtra("result");
// Login successful, update your model and call adapter.notifyDataSetChanged() or something
}
}
}
In your previous activity where you have listview with hidden icon in header, override the function onActivityResult() something like this -
protected void onActivityResult (int requestCode, int resultCode, Intent data) {
boolean success = data.getBooleanExtra("result", false);
if(success) {
hiddenIcon.setVisibility(View.VISIBLE);
}
else {
showDialog("Error");
}
}
And I've changed your onClick this way
public void onClick(View v) {
String password = etPassword.getText().toString();
Intent returnIntent = new Intent();
if(password.equals("guest")){
returnIntent.putExtra("result", true);
setResult(RESULT_OK, returnIntent);
}
else {
returnIntent.putExtra("result", false);
setResult(RESULT_OK, returnIntent);
}
finish();
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if(resultCode==RESULT_OK){
Bundle basket=data.getExtras();
String s=basket.getString("result");
//Your Code Here
}
}
This will be helpful