Hello everyone,

Developping an Android application, I would like to manage a click event from a Button object.
Here's the point : my source code is written in C++ (Qt) and my button in Java.
Can someone explain me how I can manage the click event between Java and Qt ?
Under the following form, compilation don't work.
Thanks!


myClass.cpp:
Qt Code: 
  1. MyClass::MyClass(QWidget *parent) : QWidget(parent)
  2. {
  3.     myFunction();
  4. }
  5.  
  6.  
  7. void MyClass::myFunction() {
  8.  
  9.     QAndroidJniObject MyJavaClass;
  10.     MyJavaClass = QAndroidJniObject("org/qtproject/example/myproject/MyJavaClass",
  11.                                     "(Landroid/app/Activity;)V",
  12.                                     QtAndroid::androidActivity().object<jobject>()
  13.                                     );
  14. }
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MyJavaClass.java:
Qt Code: 
  1. import ...
  2.  
  3. public class MyJavaClass {
  4.  
  5.     private final Activity m_MainActivity;
  6.  
  7.     public MyJavaClass(final Activity MainActivity)
  8.     {
  9.         m_MainActivity = MainActivity;
  10.  
  11.         m_MainActivity.runOnUiThread(new Runnable() {
  12.             @Override
  13.                 public void run()
  14.                 {
  15.                     RelativeLayout m_rlMainLayout;
  16.                     m_rlMainLayout = new RelativeLayout(m_MainActivity);
  17.                     m_MainActivity.setContentView(m_rlMainLayout);
  18.  
  19.                     ViewGroup.MarginLayoutParams mrgBtn;
  20.                     ViewGroup.MarginLayoutParams mrgText;
  21.  
  22.                     TextView tvJavaText = new TextView(m_MainActivity);
  23.                     tvJavaText.setText("Hello from Ui Thread!");
  24.  
  25.                     Button m_btn = new Button(m_MainActivity);
  26.                     m_btn.setText("Hello Button");
  27.                     m_btn.setOnClickListener(runningBtnClick);
  28.                     m_rlMainLayout.addView(m_btn);
  29.  
  30.                     mrgBtn = (ViewGroup.MarginLayoutParams) m_btn.getLayoutParams();
  31.                     mrgBtn.setMargins(150, 0, 0, 0);
  32.                     m_btn.setLayoutParams(mrgBtn);
  33.  
  34.                     OnClickListener runningBtnClick = new OnClickListener() {
  35.  
  36.                         public void onClick(View v) {
  37.                             mrgText.setMargins(150, 100, 0, 0);
  38.                             tvText.setLayoutParams(mrgText);
  39.                             tvText.setText("Hy, i clicked the button!");
  40.                             System.out.println(m_btn.getLayoutParams().height);
  41.                         }
  42.                     };
  43.                }
  44.         }
  45.    }
  46. }
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