Fragment与Fragment之间可以进行信息传递,同样,Fragment与Activity也可以进行信息的传递。
下面是一个演示在Activity中获取来自Fragment的信息,使用接口回调的方法在Activity中接收信息
MainActivity.java:
public class MainActivity extends FragmentActivity { private FragmentManager manager; private FragmentTransaction transaction; private Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); /* 获取对应的控件 */ button = (Button) this.findViewById(R.id.button); /* 获取manager */ manager = this.getSupportFragmentManager(); /* 创建事物 */ transaction = manager.beginTransaction(); /* 创建LeftFragment(在内部类中使用到了,所以要用final) */ final LeftFragment leftFragment = new LeftFragment(); /* 把Fragment添加到对应的位置 */ transaction.add(R.id.left, leftFragment, "left"); /* 提交事物 */ transaction.commit(); /* 设置按钮的监听事件 */ button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { /* 使用接口回调的方法获取数据 */ leftFragment.getEditText(new CallBack() { @Override public void getResult(String result) { /*打印信息*/ Toast.makeText(MainActivity.this, "-->>" + result, 1).show(); } }); } }); } }
LeftFragment.java代码:
public class LeftFragment extends Fragment { private Button button; private EditText editText; public LeftFragment() { // TODO Auto-generated constructor stub } @Override public void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { /*动态加载布局*/ View view = inflater.inflate(R.layout.left, null); /*从动态布局中获取对应的控件*/ editText = (EditText) view.findViewById(R.id.editText1); return view; } @Override public void onPause() { // TODO Auto-generated method stub super.onPause(); } /*接口回调*/ public void getEditText(CallBack callBack){ /*获取文本框的信息*/ String msg = editText.getText().toString(); callBack.getResult(msg); } /*接口*/ public interface CallBack{ /*定义一个获取信息的方法*/ public void getResult(String result); } }
activity_main.xml:
<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" > <LinearLayout android:id="@+id/left" android:layout_width="224dp" android:layout_height="match_parent" android:background="#CCCCCC" android:orientation="vertical" > </LinearLayout> <LinearLayout android:layout_width="wrap_content" android:layout_height="match_parent" android:orientation="vertical" > <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="获得Fragment的值" /> </LinearLayout> </LinearLayout>
left.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <EditText android:id="@+id/editText1" android:layout_width="match_parent" android:layout_height="wrap_content" android:ems="10" > <requestFocus /> </EditText> </LinearLayout>
demo演示效果: