解決Android中fragment_main.xml檔案中的組件擷取的問題

標籤：android基礎

package com.dhy.phonedial;import android.app.Activity;import android.app.Fragment;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.Button;import android.widget.EditText;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);if (savedInstanceState == null) {getFragmentManager().beginTransaction().add(R.id.container, new PlaceholderFragment()).commit();}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}/** * A placeholder fragment containing a simple view. 一個預留位置片段包含一個簡單的視圖。 *//** * 這個內部類是最新的開發工具所自動完成的,其功能就是對fragment_main.xml檔案進行載入並解析,可以擷取fragment_main. * xml中的登入組件. *  * @author Martin *  */public static class PlaceholderFragment extends Fragment {public PlaceholderFragment() {}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// 擷取視圖對象根據fragment_main.xml檔案final View rootView = inflater.inflate(R.layout.fragment_main,container, false);// 通過視圖對象擷取組件Button dialBtn = (Button) rootView.findViewById(R.id.btn_dial);System.out.println(rootView.findViewById(R.id.btn_dial)+ "============" + R.id.btn_dial + "==================="+ dialBtn);// 為組件添加事件// 由於我也是新手還沒有解決不使用匿名內部類如何擷取組件的問題,dialBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub// 同樣通過視圖對象擷取組件EditText et_number = (EditText) rootView.findViewById(R.id.edit_number);String number = et_number.getText().toString();System.out.println("================" + number);Intent intent = new Intent();intent.setAction(Intent.ACTION_CALL);intent.setData(Uri.parse("tel:" + number));startActivity(intent);}});return rootView;}}}