启动其他Activity并保存结果到指定组件上

启动其他Activity的Activity:

public class XXXXActivity extends Activity implements OnClickListener

 在onCreate方法中，获取组件：

 

Button from = (Button) findViewById(R.id.from);
Button to = (Button) findViewById(R.id.to);

 

 

发送请求的标志，表明是从哪个组件发出：

Intent intent = new Intent(XXXX.this, YYYY.class);
	if(v.getId() == R.id.from) {
		Bundle bundle = new Bundle();
		bundle.putString("flag", "from");
		intent.putExtras(bundle);
		startActivityForResult(intent, FROM_REQUEST);
	}
	if(v.getId() == R.id.to) {
		intent.putExtra("flag", "to");
		startActivityForResult(intent, TO_REQUEST);
	}

 

 

接收请求并返回请求到相应请求组件的Activity:

Intent intent = getActivity().getIntent();
Bundle bundle = intent.getExtras();
String city = (String) lv.getItemAtPosition(position);
intent.putExtra("city", city);
if(bundle.getString("flag").equals("from")) {
	setResult(FROM_RESULT, intent);
}else if(bundle.getString("flag").equals("to")) {
	getActivity().setResult(TO_RESULT, intent);
}
finish();

 

 而相应请求的Activity需重写onActivityResult方法：

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if(requestCode == FROM_REQUEST && resultCode == HotStation.FROM_RESULT) {
			from.setText(data.getExtras().getString("city"));
		}
	}