Android Fragment與Activity之間的數據交換（Fragment從Activity獲取數據）

Fragment與Activity之間的數據交換，大體上包括三種：

一、Fragment從Activity獲取數據（本文章只介紹第一種）；

二、Activity從Fragment獲取數據；

三、Fragment之間獲取數據。

實現效果圖：

從Activity傳遞數據到兩個Fragment中，Fragment獲取數據後，展示出來。

源代碼：

布局文件：

activity_main:

MyFragment1的布局文件f1:

MyFragment2的布局文件f2:

代碼文件：

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獲取數據。
 */
public class MainActivity extends Activity {
	private FragmentManager manager;
	private FragmentTransaction transaction;

	@Override
	protected 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的數據");
		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的數據");
		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 {
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
	}

	@Override
	public 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 {
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
	}

	@Override
	public 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;
	}

}

源代碼下載：

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