fragment_demo.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" > <TextView android:id="@+id/tv_textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="hello"/> </LinearLayout>MyFragment
package com.example.test28; import android.annotation.SuppressLint; import android.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; @SuppressLint("NewApi") public class MyFragment extends Fragment{ private TextView text; private int count; public static MyFragment newInstance(int num){ Bundle bundle=new Bundle(); bundle.putInt("count", num); MyFragment f=new MyFragment(); f.setArguments(bundle); return f; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle bundle=getArguments(); count=(Integer) bundle.get("count"); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view=inflater.inflate(R.layout.fragment_demo, null); return view; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { text=(TextView) view.findViewById(R.id.tv_textView); text.setText("fragment#"+count); //super.onViewCreated(view, savedInstanceState); } }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" > <LinearLayout android:id="@+id/layout" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" ></LinearLayout> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="replaceOnclick"/> </LinearLayout>MainActivity.java
package com.example.test28; import android.annotation.SuppressLint; import android.app.FragmentManager; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.view.View; public class MainActivity extends ActionBarActivity { private int num=0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @SuppressLint("NewApi") public void replaceOnclick(View view){ num++; MyFragment fragment=MyFragment.newInstance(num); getFragmentManager(). beginTransaction(). replace(R.id.layout, fragment). commit(); } }