EDIT: I realised I'm thinking about it with the wrong mindset, I need to 'return' the values inputted in the dialog box. Title updated to reflect this. The dialog fragment is called from onNavigationItemSelected. How do I get these values 'returned' from the dialog box to the main activity to use? I can't call a mainactivity method from the dialog box in the onclicklistener, it says "non-static method cannot be referenced from a static context".
I have a webview in my MainActivity, which my app is based around and everything else is fragments or dialog boxes. I need to be able to get reference to this webview so I can do something with it, according to what the user puts in the dialog box.
I have a JavaScriptInterface class for interacting with the webview which I had the same issue with, but sorted it by extending it to MainActivity (whether this is the best method I don't know, probably not).
In dialogs and other classes I can't do this as it needs to extend other things, i.e. Dialog etc. So how can I get reference to it from these classes?
MainActivity:
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
Context context;
public WebView webView;
JSInterface JSInterface;
// other stuff
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = getApplicationContext();
webView = findViewById(R.id.webView);
JSInterface = new JSInterface(this, this);
}
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
//creating fragment object
Fragment fragment = null;
//initializing the fragment object which is selected
if (id == R.id.nav_home) {
} else if (id == R.id.nav_go_to) {
FragmentManager fm = getSupportFragmentManager();
DialogFragmentGoTo dialogFragment = new MyDialogFragment();
dialogFragment.show(fm, "MyDialogFragment");
}
//replacing the fragment
if (fragment != null) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(R.id.content_main, fragment);
ft.addToBackStack(null);
ft.commit();
}
DrawerLayout drawer = findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
JSInterface:
public class JSInterface extends MainActivity {
private MainActivity mainActivity;
JSInterface(Context context, MainActivity mActivity) {
mainActivity = mActivity;
}
@JavascriptInterface
public void someMethod() {
//can interact with webview from here if needed, as if from mainactivity
}
// other methods
}
DialogFragment:
public class DialogFragmentGoTo extends DialogFragment {
Context context;
EditText et1;
EditText et2;
LinearLayout layout;
AlertDialog.Builder builder;
String et1Text;
String et2Text;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
//init
context = getContext();
et1 = new EditText(context);
et2 = new EditText(context);
layout = new LinearLayout(context);
builder = new AlertDialog.Builder(getActivity());
//layout options
layout.setOrientation(LinearLayout.VERTICAL);
setDialog();
builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
et1Text = et1.getText().toString();
et1Text = et2.getText().toString();
setInputs(et1Text, et2Text);
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dismiss();
}
});
return builder.create();
}
private void setInputs(String et1Text, String et2Text) {
webView.loadUrl("javascript:setInputs(" + et1Text + "," + et2Text + ");");
}
private void setDialog() {
//et1
et1.setRawInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_DECIMAL);
et1.setImeOptions(EditorInfo.IME_ACTION_UNSPECIFIED);
et1.setSingleLine(true);
et1.setLines(1);
et1.setMaxLines(1);
et1.setHorizontalScrollBarEnabled(false);
et1.setHint("Text1");
layout.addView(et1);
//et2
et2.setRawInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_DECIMAL);
et2.setImeOptions(EditorInfo.IME_ACTION_UNSPECIFIED);
et2.setSingleLine(true);
et2.setLines(1);
et2.setMaxLines(1);
et2.setHorizontalScrollBarEnabled(false);
et2.setHint("Text2");
layout.addView(et2);
//builder
builder.setTitle("Enter texts");
builder.setView(layout);
}
}
Now, I could import it if I made it static but that's not an option and bad practice with webviews (memory leak):
import static com.example.app.MainActivity.webView;
I'm a beginner in programming, so if someone could help me and explain how I do this - I'd very much appreciate it.
