Hi, I have just start to develop android, and I just cannot start my Hello World application. I have followed instructions about android installation, I have changed several Eclipse IDE's, but still, when I press f11 to compile, it 'does' some job int he background, activate my virtual device, but wont to behave just as it should! Only " Android . . . " is displayed on the screen, which mean that my class isn't 'loaded', somehow. This is sample class :
view plaincopy to clipboardprint? 1. package test.and; 2. import android.app.Activity; 3. import android.os.Bundle; 4. import android.view.View; 5. import android.widget.Button; 6. import android.widget.EditText; 7. import android.widget.TextView; 8. 9. 10. public class TestAppActiv extends Activity { 11. Button button1; 12. EditText txtbox1,txtbox2; 13. TextView tv; 14. 15. /** Called when the activity is first created. */ 16. @Override 17. public void onCreate(Bundle savedInstanceState) { 18. super.onCreate(savedInstanceState); 19. setContentView(R.layout.main); 20. txtbox1= (EditText) findViewById(R.id.txtbox1); 21. button1 = (Button) findViewById(R.id.button1); 22. tv = (TextView) findViewById(R.id.lbl1); 23. txtbox2= (EditText) findViewById(R.id.txtbox2); 24. button1.setOnClickListener(new Clicker()); 25. } 26. class Clicker implements Button.OnClickListener 27. { 28. public void onClick(View v) 29. { 30. String a,b; 31. Integer vis; 32. a = txtbox1.getText().toString(); 33. b = txtbox2.getText().toString(); 34. vis = Integer.parseInt(a)+Integer.parseInt(b); 35. tv.setText(vis.toString()); 36. } 37. } 38. } package test.and; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; public class TestAppActiv extends Activity { Button button1; EditText txtbox1,txtbox2; TextView tv; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); txtbox1= (EditText) findViewById(R.id.txtbox1); button1 = (Button) findViewById(R.id.button1); tv = (TextView) findViewById(R.id.lbl1); txtbox2= (EditText) findViewById(R.id.txtbox2); button1.setOnClickListener(new Clicker()); } class Clicker implements Button.OnClickListener { public void onClick(View v) { String a,b; Integer vis; a = txtbox1.getText().toString(); b = txtbox2.getText().toString(); vis = Integer.parseInt(a) +Integer.parseInt(b); tv.setText(vis.toString()); } } } And, also main.xml file, which reflect contains xml representation of display window : main.xml : view plaincopy to clipboardprint? 1. <?xml version="1.0" encoding="utf-8"?> 2. <AbsoluteLayout 3. android:id="@+id/widget35" 4. android:layout_width="fill_parent" 5. android:layout_height="fill_parent" 6. xmlns:android="http://schemas.android.com/apk/res/android" 7. > 8. <EditText 9. android:id="@+id/txtbox1" 10. android:layout_width="145px" 11. android:layout_height="40px" 12. android:text="EditText" 13. android:textSize="18sp" 14. android:layout_x="75px" 15. android:layout_y="54px" 16. > 17. </EditText> 18. <EditText 19. android:id="@+id/txtbox2" 20. android:layout_width="144px" 21. android:layout_height="40px" 22. android:text="EditText" 23. android:textSize="18sp" 24. android:layout_x="75px" 25. android:layout_y="109px" 26. > 27. </EditText> 28. <Button 29. android:id="@+id/button1" 30. android:layout_width="106px" 31. android:layout_height="36px" 32. android:text="Button" 33. android:layout_x="88px" 34. android:layout_y="224px" 35. > 36. </Button> 37. <TextView 38. android:id="@+id/lbl1" 39. android:layout_width="141px" 40. android:layout_height="wrap_content" 41. android:text="TextView" 42. android:layout_x="76px" 43. android:layout_y="166px" 44. > 45. </TextView> 46. </AbsoluteLayout> <?xml version="1.0" encoding="utf-8"?> <AbsoluteLayout android:id="@ +id/widget35" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http:// schemas.android.com/apk/res/android" > <EditText android:id="@+id/ txtbox1" android:layout_width="145px" android:layout_height="40px" android:text="EditText" android:textSize="18sp" android:layout_x="75px" android:layout_y="54px" > </EditText> <EditText android:id="@+id/txtbox2" android:layout_width="144px" android:layout_height="40px" android:text="EditText" android:textSize="18sp" android:layout_x="75px" android:layout_y="109px" > </EditText> <Button android:id="@+id/ button1" android:layout_width="106px" android:layout_height="36px" android:text="Button" android:layout_x="88px" android:layout_y="224px" > </Button> <TextView android:id="@+id/lbl1" android:layout_width="141px" android:layout_height="wrap_content" android:text="TextView" android:layout_x="76px" android:layout_y="166px" > </TextView> </AbsoluteLayout> then, strings.xml : view plaincopy to clipboardprint? 1. <?xml version="1.0" encoding="utf-8"?> 2. <resources> 3. <string name="hello">Hello World, TestAppActiv!</string> 4. <string name="app_name">TestApp</string> 5. </resources> <?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">Hello World, TestAppActiv!</string> <string name="app_name">TestApp</string> </resources> AndroidManifest.xml : view plaincopy to clipboardprint? 1. <?xml version="1.0" encoding="utf-8"?> 2. <manifest xmlns:android="http://schemas.android.com/apk/res/ android" 3. package="test.and" 4. android:versionCode="1" 5. android:versionName="1.0"> 6. <application android:icon="@drawable/icon" android:label="@string/app_name"> 7. <activity android:name=".TestAppActiv" 8. android:label="@string/app_name"> 9. <intent-filter> 10. <action android:name="android.intent.action.MAIN" /> 11. <category android:name="android.intent.category.LAUNCHER" /> 12. </intent-filter> 13. </activity> 14. 15. </application> 16. 17. 18. </manifest> <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http:// schemas.android.com/apk/res/android" package="test.and" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".TestAppActiv" android:label="@string/ app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </ activity> </application> </manifest> and default.properties file : view plaincopy to clipboardprint? 1. # This file is automatically generated by Android Tools. 2. # Do not modify this file -- YOUR CHANGES WILL BE ERASED! 3. # 4. # This file must be checked in Version Control Systems. 5. # 6. # To customize properties used by the Ant build system use, 7. # "build.properties", and override values to adapt the script to your 8. # project structure. 9. 10. # Project target. 11. target=android-3 # This file is automatically generated by Android Tools. # Do not modify this file -- YOUR CHANGES WILL BE ERASED! # # This file must be checked in Version Control Systems. # # To customize properties used by the Ant build system use, # "build.properties", and override values to adapt the script to your # project structure. # Project target. target=android-3 Just as I said, I did install everything I needed (SDK, ADT plugin, etc...), but it still wont work I appreciate any help! 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