[Android]Activity返回上一頁

page1

package Demo;
 
/* import相關class */
import java.text.DecimalFormat;
import java.text.NumberFormat;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
 
public class Page1 extends Activity 
{
  Intent intent;
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) 
  {
    super.onCreate(savedInstanceState);
    /* 載入mylayout.xml Layout */
    setContentView(R.layout.myalyout);
     
     
    Button b1 = (Button) findViewById(R.id.button1);
    b1.setOnClickListener(new Button.OnClickListener()
    {
      public void onClick(View v)
      {
       /* 回傳result回上一個activity */
       Page1.this.setResult(RESULT_OK, intent);
        
       /* 關閉activity */
       Page1.this.finish();
      }
    });
  }
}

page2

package Demo;

/* import相關class */
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;

public class Page2 extends Activity 
{
    
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) 
  {
    super.onCreate(savedInstanceState);
    /* 載入main.xml Layout */
    setContentView(R.layout.main);
   
        /*new一個Intent物件，並指定class*/
     Intent intent = new Intent();
        intent.setClass(Page2.this,Page1.class);
     
     /*呼叫Activity EX03_11_1*/
     startActivityForResult(intent,0);
      }
  
  /* 覆寫 onActivityResult()*/
  @Override
  protected void onActivityResult(int requestCode, int resultCode,
                                  Intent data)
  {
    switch (resultCode)
    { 
      case RESULT_OK:
//回上一頁囉
        break;       
      default: 
        break; 
     } 
   } 
}