点击第一个按钮，然后再第二个页面中输入文字，就会在第一个的EditText中出现在第二个Activity中输入的文字，、
代码一看就能明白startActivityForResult函数
第一个Activity
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class DataBackActivity extends Activity {
/** Called when the activity is first created. */
private static final int REQUESTCODE=1;
private Button button;
private EditText editText;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button=(Button) findViewById(R.id.button1);
editText=(EditText) findViewById(R.id.editText1);
button.setOnClickListener(new MyButtonLIstener());
}
class MyButtonLIstener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent=new Intent();
intent.setClass(DataBackActivity.this, To.class);
startActivityForResult(intent, REQUESTCODE);
}
}
/* (non-Javadoc)
* @see android.app.Activity#onActivityResult(int, int, android.content.Intent)
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if (requestCode==REQUESTCODE) {
switch (resultCode) {
case RESULT_OK:
String dateString=data.getExtras().getString("Da");
Log.i("----------->", dateString);
editText.setText(dateString);
break;
default:
break;
}
}
super.onActivityResult(requestCode, resultCode, data);
}
}
第二个Activity
package rw.data;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class To extends Activity {
/** Called when the activity is first created. */
private Button button;
private EditText editText;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.to);
button=(Button) findViewById(R.id.button1);
editText=(EditText) findViewById(R.id.editText1);
button.setOnClickListener(new MyButtonLIstener());
}
class MyButtonLIstener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent=new Intent();
intent.putExtra("Da", editText.getText().toString());
To.this.setResult(RESULT_OK, intent);
To.this.finish();
}
}
}
