fragment静态动态加载和与activity传输数据

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.helloworld">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.HelloWorld">

        <activity android:name="com.example.helloworld.MyfragmentActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="30dp"
    android:background="@color/black"
    android:id="@+id/parent_textview_id"
    android:text="Fragment111">
</TextView>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <fragment
        android:layout_width="600dp"
        android:layout_height="300dp"
        android:id="@+id/myfragment"
        android:name="com.example.helloworld.MyFragment"/>
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/rl_fragment"
        android:orientation="horizontal" />
</LinearLayout>

public class MyFragment extends Fragment {
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, 
    		@Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.expandlista, container, false);
        return view;
    }
}

public class MyFragment2 extends Fragment {
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, 
    		@Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        TextView view = (TextView)inflater.inflate(R.layout.expandlista, container, false);
        String name = getArguments().getString("name");
        view.setText(name);
        return view;
    }
    
    public void setCallback(Callback callback){
        String msg="传回去:"+System.currentTimeMillis();
        callback.getResult(msg);
    }

    public interface Callback{
        void getResult(String msg);
    }
}

public class MyfragmentActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.myfragment);
        init1();
    }

    public void init1() {
        MyFragment2 f=new MyFragment2();
        Bundle b=new Bundle();
        b.putString("name","张三");
        f.setArguments(b);

        FragmentManager fm = getSupportFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();
        
        //把f add到R.id.rl_fragment，可以add多个不同的fragment
        ft.add(R.id.rl_fragment,f);
        //ft.replace(R.id.rl_fragment,f1);	//替换fragment
        //设置ft.addToBackStack(null)，按回退会推到动态fragment未加入的状态，否则直接退出activity
        ft.addToBackStack(null);
        ft.commit();

        View v = findViewById(R.id.myfragment);
        v.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                f.setCallback(new MyFragment2.Callback() {
                    @Override
                    public void getResult(String msg) {
                        Log.e("tttt",msg);
                    }
                });
            }
        });
    }
}

MyFragment：静态加载
MyFragment2 ：动态加载

本文地址：https://blog.csdn.net/weixin_43292547/article/details/110537657