Fragment与Activity之间的数据交换,通常含有3:
一、Fragment从Activity获取数据(仅本文介绍了一个第一);
两、Activity从Fragment获取数据;
三、Fragment之间的数据访问。
实现效果图:
从Activity传递数据到两个Fragment中,Fragment获取数据后,展示出来。
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源码:
布局文件:
activity_main:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="horizontal"> <LinearLayout
android:id="@+id/left"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="2"
android:background="#CCCCCC">
</LinearLayout> <LinearLayout
android:id="@+id/right"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="2">
</LinearLayout> </LinearLayout>
MyFragment1的布局文件f1:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context=".MainActivity" > <TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content" /> </LinearLayout>
MyFragment2的布局文件f2:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context=".MainActivity" > <TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content" /> </LinearLayout>
代码文件:
MainActivity:
package com.fragmentdemo5_commute; import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle; /**
* 一、Fragment从Activity获取数据。 */
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发送给MyFragment1的数据");
fragment1.setArguments(bundle1);
transaction.replace(R.id.left, fragment1, "left"); MyFragment2 fragment2 = new MyFragment2();
Bundle bundle2 = new Bundle();
bundle2.putString("id", "Activity发送给MyFragment2的数据");
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;
} }
源码下载: