android 77 fragment

package com.itheima.fragment;

import android.os.Bundle;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.view.Menu;
import android.view.View;

public class MainActivity extends Activity {

private Fragment03 fg3;

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

fg3 = new Fragment03();
//获取fragment管理器
FragmentManager fm = getFragmentManager();
//打开事务
FragmentTransaction ft = fm.beginTransaction();
//把内容显示至帧布局
ft.replace(R.id.fl, fg3);
//提交
ft.commit();
}

public void click1(View v){
//把fragment01的界面显示至帧布局中
//创建fragment对象
Fragment01 fg1 = new Fragment01();
//获取fragment管理器
FragmentManager fm = getFragmentManager();
//打开事务
FragmentTransaction ft = fm.beginTransaction();
//把内容显示至帧布局
ft.replace(R.id.fl, fg1);
//提交
ft.commit();
commit()之前没有调用addToBackStack()，那个fragment将会是destroyed；如果调用了addToBackStack()，这个fragment会是stopped，可以通过返回键来恢复。
}

public void click2(View v){
//把fragment01的界面显示至帧布局中
//创建fragment对象
Fragment02 fg2 = new Fragment02();
//获取fragment管理器
FragmentManager fm = getFragmentManager();
//打开事务
FragmentTransaction ft = fm.beginTransaction();
//把内容显示至帧布局
ft.replace(R.id.fl, fg2);
//提交
ft.commit();
}

public void click3(View v){
//把fragment01的界面显示至帧布局中
//获取fragment管理器
FragmentManager fm = getFragmentManager();
//打开事务
FragmentTransaction ft = fm.beginTransaction();
//把内容显示至帧布局
ft.replace(R.id.fl, fg3);
//提交
ft.commit();
}
}

<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"
>

<FrameLayout
android:id="@+id/fl"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="match_parent"
></FrameLayout>

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical"
>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fragment01"
android:onClick="click1"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fragment02"
android:onClick="click2"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fragment03"
android:onClick="click3"
/>
</LinearLayout>
</LinearLayout>

package com.itheima.fragment;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Fragment01 extends Fragment {

//返回的view对象会作为fragment01的内容显示在屏幕上
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//inflater是布局填充器
View v = inflater.inflate(R.layout.fragment01, null);
return v;
}

@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
System.out.println("01create");
}

@Override
public void onStart() {
// TODO Auto-generated method stub
super.onStart();
System.out.println("01start");
}

@Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
System.out.println("01resume");
}

@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
System.out.println("01pause");
}

@Override
public void onStop() {
// TODO Auto-generated method stub
super.onStop();
System.out.println("01stop");
}

@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
System.out.println("01destroy");
}
}

<?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"
android:background="#ff0000"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="热情的红色"
android:textSize="20sp"
/>

</LinearLayout>

package com.itheima.fragment;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Fragment02 extends Fragment {

//返回的view对象会作为fragment02的内容显示在屏幕上
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View v = inflater.inflate(R.layout.fragment02, null);
return v;
}
}

<?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"
android:background="#0000ff"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="忧桑的蓝色"
android:textSize="20sp"
/>

</LinearLayout>

package com.itheima.fragment;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class Fragment03 extends Fragment {

//返回的view对象会作为fragment03的内容显示在屏幕上
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View v = inflater.inflate(R.layout.fragment03, null);
return v;
}

@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
System.out.println("03create");
}

@Override
public void onStart() {
// TODO Auto-generated method stub
super.onStart();
System.out.println("03start");
}

@Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
System.out.println("03resume");
}

@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
System.out.println("03pause");
}

@Override
public void onStop() {
// TODO Auto-generated method stub
super.onStop();
System.out.println("03stop");
}

@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
System.out.println("03destroy");
}
}

<?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"
android:background="#00ff00"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="小志的绿色"
android:textSize="20sp"
/>

</LinearLayout>