Android Fragment與Activity之間的資料交換（Fragment從Activity擷取資料）

Fragment與Activity之間的資料交換，大體上包括三種：

一、Fragment從Activity擷取資料（本文章只介紹第一種）；

二、Activity從Fragment擷取資料；

三、Fragment之間擷取資料。

實現：

從Activity傳遞資料到兩個Fragment中，Fragment擷取資料後，展示出來。

原始碼：

布局檔案：

activity_main:

MyFragment1的布局檔案f1:

MyFragment2的布局檔案f2:

代碼檔案：

MainActivity：

package com.fragmentdemo5_commute;import android.app.Activity;import android.app.FragmentManager;import android.app.FragmentTransaction;import android.os.Bundle;/** * 一、Fragment從Activity擷取資料。 */public class MainActivity extends Activity {private FragmentManager manager;private FragmentTransaction transaction;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);manager = getFragmentManager();transaction = manager.beginTransaction();MyFragment1 fragment1 = new MyFragment1();Bundle bundle1 = new Bundle();bundle1.putString("id", "Activity發送給MyFragment1的資料");fragment1.setArguments(bundle1);transaction.replace(R.id.left, fragment1, "left");MyFragment2 fragment2 = new MyFragment2();Bundle bundle2 = new Bundle();bundle2.putString("id", "Activity發送給MyFragment2的資料");fragment2.setArguments(bundle2);transaction.replace(R.id.right, fragment2, "right");transaction.commit();}}

MyFragment1：

package com.fragmentdemo5_commute;import android.app.Fragment;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class MyFragment1 extends Fragment {@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {View view = inflater.inflate(R.layout.f1, null);TextView textView = (TextView) view.findViewById(R.id.textView);Bundle bundle1 = getArguments();textView.setText(bundle1.getString("id"));return view;}}

MyFragment2：

package com.fragmentdemo5_commute;import android.app.Fragment;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class MyFragment2 extends Fragment {@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {View view = inflater.inflate(R.layout.f2, null);TextView textView = (TextView) view.findViewById(R.id.textView);Bundle bundle2 = getArguments();textView.setText(bundle2.getString("id"));return view;}}

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