Develop Reference

onBackPressed() back to Activity, not folder

I want to access the folder with other folders and files to see them and press the back button to return to the main view.
But when I press the back button, it returns me to the previous folder in the directory I am in. Only if I give it several times back, it returns to main view.
Is there a way to force it back to main view by pressing the Back button only once or maybe some way to create a floating button to create a new Intent once ACTION_GET_CONTENT is used?
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
....
projectList.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Just to see existing folders
Intent i = new Intent(Intent.ACTION_GET_CONTENT)
.setType("file/*");
setResult(RESULT_OK, i);
startActivityForResult(i, CODE_SEE_FOLDER);
}
});
}
...
#Override
public void onBackPressed() {
Intent intent = new Intent();
setResult(RESULT_CANCELED, intent);
startActivityForResult(intent, CODE_SEE_FOLDER);
super.onBackPressed();
}
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == CODE_SEE_FOLDER && requestCode == RESULT_OK){
Toast.makeText(context, "Your projects..", Toast.LENGTH_SHORT).show();
}else {
recreate();
}
}

Start activity from fragment, then get callback

I am trying to get a callback from an activity that I am starting with an intent in my fragment.
I thought I could do this with onActivityResult but it doesn't seem to get called when I finish(); on the activity. Is this possible in a fragment?
Fragment.java
#Nullable
#Override
public View onCreateView(final LayoutInflater inflater, #Nullable ViewGroup container, Bundle savedInstanceState) {
getActivity().setTitle("Waiver");
myView = inflater.inflate(R.layout.waiver_layout, container, false);
signBtn = myView.findViewById(R.id.signBtn);
signBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(), SignatureActivity.class);
intent.putExtra("signatureAbleId", device.id);
intent.putExtra("signatureAbleType", "App\\Models\\Device");
startActivity(intent);
}
});
return myView;
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data){
Log.v("Activity", "The activity has finished");
if(resultCode == 200){
saveWaiver();
}
}
private void saveWaiver(){
Log.v("Save Waiver", "Saving waiver for you.");
}
SignatureActivity.java
public class SignatureActivity extends AppCompatActivity {
private Button btnClear;
private Button btnSave;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
setContentView(R.layout.activity_signature);
Bundle bundle = getIntent().getExtras();
if(bundle != null){
signatureAbleId = bundle.getInt("signatureAbleId");
signatureAbleType = bundle.getString("signatureAbleType");
}
btnClear = findViewById(R.id.btnClear);
btnSave = findViewById(R.id.btnSave);
btnClear.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mSignaturePad.clear();
}
});
btnSave.setOnClickListener(new View.OnClickListener() {
setResult(200);
finish();
});
}
}

Use this. It will help you
Intent intent = new Intent(getContext(), SignatureActivity.class);
Instead of
Intent intent = new Intent(getActivity(), SignatureActivity.class);
And Yes need to change :
startActivity to startActivityForResult

Use startActivityForResult instead of startActivity
startActivityForResult(intent, 11);
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data){
if(requestCode == 11){
if(resultCode == 200){
saveWaiver();
}
}else{
super.onActivityResult(requestCode, resultCode, data)
}
}

startActivityForResult() does not work

I have a button in Claims.java. When button is pressed, it will show Alert Dialog Window with radio buttons.If the radio button is checked, it will goes to specific activity. In the activity, it has an editText and a save button. I want the value on the editText display on the button(Claims.java) when the save button in the activity is clicked.
Claims.java >> AlertDialog Window in Claims.java >> AlertDialogRadio.java
I use startActivityForResult() to receive a result back from AlertRadioDialog.java. But the problem now is it will display AlertDialogRadio which is not what I want and the text does not display on the textView. How can I do to achieve this?
Claims.java
public class Claims extends Fragment {
private TextView c;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View claims = inflater.inflate(R.layout.claims, container, false);
View.OnClickListener listener = new View.OnClickListener() {
public void onClick(View v) {
AlertDialogRadio();
}
};
Button button1 = (Button) claims.findViewById(R.id.button10);
Button button = (Button) claims.findViewById(R.id.button8);
button1.setOnClickListener(listener);
c=(TextView)claims.findViewById(R.id.textView49);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent(getActivity().getApplicationContext(), CameraMain.class);
startActivity(intent);
}
});
return claims;
}
public void AlertDialogRadio() {
final CharSequence[] ClaimsModel = {"Project", "Petrol", "Car Maintenance"
, "Medical", "Other"};
AlertDialog.Builder alt_bld = new AlertDialog.Builder(getActivity());
alt_bld.setTitle("Select a Claims");
alt_bld.setSingleChoiceItems(ClaimsModel, -1, new DialogInterface
.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
if (item == 0) {
Intent intent = new Intent(getActivity().getApplicationContext(), Project1.class);
startActivity(intent);
} else if (item == 1) {
Intent intent = new Intent(getActivity().getApplicationContext(), Petrol.class);
startActivity(intent);
} else if (item == 2) {
Intent intent = new Intent(getActivity().getApplicationContext(), CarMainten.class);
startActivity(intent);
} else if (item == 3) {
Intent intent = new Intent(getActivity().getApplicationContext(), Medical.class);
startActivity(intent);
} else if (item == 4) {
Intent intent = new Intent(getActivity().getApplicationContext(), Other.class);
startActivity(intent);
}
}
});
AlertDialog alert = alt_bld.create();
alert.show();
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
if(resultCode == Activity.RESULT_OK){
String result=data.getStringExtra("text");
c.setText(result);
}
if (resultCode == Activity.RESULT_CANCELED) {
//Write your code if there's no result
}
}
}//onActivityResult
}
Assume the user choose Project.
Project1.java
public class Project1 extends AppCompatActivity {
private static String text;
private static EditText txt;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.project);
txt= (EditText)findViewById(R.id.editText36);
Button b=(Button)findViewById(R.id.button17);
b.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent returnIntent = new Intent();
text = txt.getText().toString();
returnIntent.putExtra("text", text);
setResult(Activity.RESULT_OK, returnIntent);
finish();
}
});
}
}

First of all, you're not using startActivityForResult at all.
Here's how you should proceed:
Claims.java
public static final int PROJECT_REQUEST_CODE = 1;
public static final int CAMERA_REQUEST_CODE = 2;
public static .....
if (item == 0) {
Intent intent = new Intent(getActivity().getApplicationContext(), Project1.class);
startActivityForResult(intent, PROJECT_REQUEST_CODE);
}
else if .....
And in OnActivityResult :
if (requestCode == PROJECT_REQUEST_CODE) {
...
}
else if(requestCode == CAMERA_REQUEST_CODE) {
...
}
else if ...

How to properly start nextQuestion method by pressing OK button in a popup dialog?

In my quiz game, after wrong answer I call a popup with an Intent for result. In that popup I have an OK button. I need, after user press OK button, to load next question. But now, I see in background next question loaded, even though my popup is not closed. Here's my code:
static final int MY_REQUEST = 0;
Intent i = new Intent(Kviz.this, Popup_pogresno.class);
startActivityForResult(i, MY_REQUEST);
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
nextQuestion();
}
And my popup class (it's a Theme.Dialog activity):
public class Popup_pogresno extends Activity implements OnClickListener{
Button ok;
#Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
super.onCreate(savedInstanceState);
setContentView(R.layout.popup);
ok = (Button) findViewById(R.id.bPopupOK);
ok.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
finish();
}
});
}
public void onClick(View v) {
// TODO Auto-generated method stub
}
#Override
public void onBackPressed() {
//do nothing
}
}
So, I need the next question NOT to load UNTIL I press the OK button.

set a result code in Popup_pogresno Activity, and check this result code in Kviz activity on the basis of request code. If result code is ok the call the function nextQuestion()
set result code as follow and check in Kviz for is result code.
Intent i = new Intent(Kviz.this, Popup_pogresno.class);
startActivityForResult(i, MY_REQUEST);
set result code on ok button click in Popup_pogresno :
Intent returnIntent = new Intent();
setResult(RESULT_OK, returnIntent);
finish();
check for result code
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == MY_REQUEST) {
if(resultCode == RESULT_OK){
nextQuestion();
}
if (resultCode == RESULT_CANCELED) {
//Write your code if there's no result
}
}
}

Execute code after getting back from an Intent

I have a TextView in my main activity.
pressing a button i open another activity and get to the options where i can rename my
TextView
btnSet.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, Options.class);
startActivity(intent);
}
});
In my Options activity i rename my TextView like this
public class Options extends MainActivity{
public static Boolean isRenamed;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.options);
String lblName = ("Counter 1");
Button btnOk = (Button) findViewById(R.id.btn_ok);
btnOk.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent backToMain = new Intent(Options.this, MainActivity.class);
EditText labelName = (EditText) findViewById(R.id.set_name);
String lblName = labelName.getText().toString();
backToMain.putExtra(LABEL_NAME, lblName);
isRenamed = true;
startActivity(backToMain);
finish();
}
});
}
}
I am using the boolean isRenamed and i set it to true after clicking ok
And in my main activity i've set this
if (Options.isRenamed == true) {
// Get the message from the intent
Intent backToMain = getIntent();
String lblName = backToMain.getStringExtra(Options.LABEL_NAME);
// Edit the text view
TextView label = (TextView) findViewById(R.id.label1);
label.setText(lblName);
}
For now it's force closing, but is there some more elegant way to see if i've renamed the file and then execute that piece of code to set it?

Context.startActivityForResult();
do all your renaming and other stuff there. return a simple integer to know what happened. That way when you call finish() in your second activity it will return to your first without creating a new instance.

Use startActivityForResult() instead of startActivity(). In the Options Activity:
public static final int RENAMED = 100;
btnOk.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent backToMain = new Intent(Options.this, MainActivity.class);
EditText labelName = (EditText) findViewById(R.id.set_name);
String lblName = labelName.getText().toString();
backToMain.putExtra(LABEL_NAME, lblName);
isRenamed = true;
setResult(RENAMED);
finish();
}
});
In MainActiviy, override onActivityResult() and
when it is fired check if resultCode paramter is equals to RENAMED .

for this senario you need to use
startActivityForResult(intent, requestCode)
instead of startActivity(intent)
in your Options Activity you ca setResult(resultCode, data) and call finish.
and in MainActivity you can use data in
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
}

you can use
startActivityForResult(intent, intentsData.REQUEST_CODE);
and then change your TextView when activity is resumed
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
/**
* change your TextView
*/
super.onActivityResult(requestCode, resultCode, data);
}