Question

I am self- learner to android,

Assume an android program is going to display some result on a textview.can any one tell me how to show that answer on first tab of the tab host’s on the next screen.How to achieve this?

As per my knowledge i googled and found “Shared preference” concept will be helpful to this problem. Was i right?

And i found some samples but they are not making me clear,can any one give me some examples with screen images.

Thanks for your precious time!.

Answer 1

here is a small sample in this whatever you enter in first tab it is shown on second tab:

Main class

public class CheckkActivity extends TabActivity {
 /** Called when the activity is first created. */
  @Override      
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Resources res = getResources();                 
    TabHost tabHost = getTabHost();  // The activity TabHost
    TabHost.TabSpec spec;  // Resusable TabSpec for each tab
    Intent intent;  // Reusable Intent for each tab


    intent = new Intent().setClass(this, NewActivity.class);


    spec = tabHost.newTabSpec("first").setIndicator("First")
                  .setContent(intent);
    tabHost.addTab(spec);


    intent = new Intent().setClass(this, SecondActivity.class);
    spec = tabHost.newTabSpec("second").setIndicator("Second")
                  .setContent(intent);
    tabHost.addTab(spec);



    tabHost.setCurrentTab(0);

}
}

NewActivity

     public class NewActivity extends Activity{
    EditText get;
    Button save;
     SharedPreferences sharedPreferences;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.next);
        get=(EditText)findViewById(R.id.next);
        save=(Button)findViewById(R.id.button1);


          save.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                if(get.getText().toString().equalsIgnoreCase("")){
                    Toast.makeText(getApplicationContext(), "enter something", Toast.LENGTH_SHORT).show();
                }else{
                sharedPreferences=PreferenceManager.getDefaultSharedPreferences(NewActivity.this);
                   Editor editor1 = sharedPreferences.edit();
                   editor1.remove("answer");
                   editor1.commit();
                 sharedPreferences=PreferenceManager.getDefaultSharedPreferences(NewActivity.this);
                  Editor editor = sharedPreferences.edit();
                  Log.i("set value",""+get.getText().toString());
                  editor.putString("answer",get.getText().toString());
                  editor.commit();}
            }
        });

    }

   }

SecondActivity

      public class SecondActivity extends Activity{
TextView set;
SharedPreferences sharedPreferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.second);
    set=(TextView)findViewById(R.id.second);

}

     @Override
     protected void onResume() {
// TODO Auto-generated method stub
sharedPreferences = PreferenceManager
        .getDefaultSharedPreferences(SecondActivity.this);
String answer= sharedPreferences.getString("answer", "");
Log.v("get value",""+answer);
if(answer.equalsIgnoreCase(null)){
    set.setText("nothing to display");
}else{
set.setText(answer);
}
super.onResume();
     }
   }