android学习之fragment的简单使用

<pre name="code" class="java">package com.example.myexercise;

import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.RadioGroup;

public class MainActivity extends AppCompatActivity {
RadioGroup radioGroup;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
radioGroup = (RadioGroup) findViewById(R.id.my_radiogroup);
radioGroup.setOnCheckedChangeListener(OnCheckedChangeListener);
}

RadioGroup.OnCheckedChangeListener OnCheckedChangeListener = new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
switch (i){
case R.id.first:
Intent intent = new Intent(MainActivity.this,MainActivity2.class);
startActivity(intent);
break;

case R.id.second:
FirstFragment firstFragment = new FirstFragment();
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.content,firstFragment);
//返回之前的状态
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
break;

case R.id.third:
Intent intent1 = new Intent(MainActivity.this,MainActivity3.class);
startActivity(intent1);
break;

case R.id.fourth:
Intent intent2 = new Intent(MainActivity.this,MainActivity4.class);
startActivity(intent2);
break;
}
}
};
}

package com.example.myexercise;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

/**
* Created by Administrator on 2016/7/9 0009.
*/
public class MainActivity2 extends Activity{
TextView tv;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.first_fragment);
tv = (TextView) findViewById(R.id.first_textview);
//静态加载的fragment可以通过findviewbyid直接找到fragment里面的控件
Button button = (Button) findViewById(R.id.first_button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
tv.setText("我改变了");
}
});
}

}

package com.example.myexercise;

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
* Created by Administrator on 2016/7/12 0012.
*/
public class MainActivity3 extends Activity {
LinearLayout linearLayout;
TextView textView;
Button button;
boolean oneOrTwo = true;
FragmentManager fragmentManager;
FragmentTransaction fragmentTransaction;
Fragment one;
Fragment two;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.first_fragment_view);
initViews();
fragmentManager = getFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
one = new SecondFragment();
two = new ThirdFragment();
fragmentTransaction.add(R.id.layout,one);
fragmentTransaction.commit();
}

private void initViews(){
linearLayout = (LinearLayout) findViewById(R.id.layout);
textView = (TextView) findViewById(R.id.first_textview);
button = (Button) findViewById(R.id.first_button);
button.setOnClickListener(onClickListener);
}

View.OnClickListener onClickListener = new View.OnClickListener() {
@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.first_button:
changeFragment();
break;
}
}
};

/**
* 切换fragment
*/
private void changeFragment(){
fragmentTransaction = fragmentManager.beginTransaction();
if(oneOrTwo){
fragmentTransaction.replace(R.id.layout,two);
fragmentTransaction.commit();
oneOrTwo = false;
}else{
fragmentTransaction.replace(R.id.layout,one);
oneOrTwo = true;
fragmentTransaction.commit();
}
}
}

package com.example.myexercise;

import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

/**
* Created by Administrator on 2016/7/12 0012.
*/
public class MainActivity4 extends Activity implements FourthFragment.MyListener{
private EditText editText;
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main4);
initViews();
}

private void initViews(){
editText = (EditText) findViewById(R.id.edit);
button = (Button) findViewById(R.id.send);
button.setOnClickListener(onClickListener);
}

View.OnClickListener onClickListener = new View.OnClickListener() {
@Override
public void onClick(View view) {
if(view.getId() == R.id.send){
String text = editText.getText().toString();
FourthFragment fourthFragment = new FourthFragment();
Bundle bundle = new Bundle();
bundle.putString("name",text);
fourthFragment.setArguments(bundle);
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
//第三个参数时动态的给fragment设置tag（标签）
fragmentTransaction.add(R.id.zzz,fourthFragment,"fragment5");
fragmentTransaction.commit();
Toast.makeText(MainActivity4.this,"数据发送成功",Toast.LENGTH_SHORT).show();
}
}
};

@Override
public void sendData(String aaa) {
Toast.makeText(MainActivity4.this,aaa,Toast.LENGTH_SHORT).show();
}
}

package com.example.myexercise;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
* Created by Administrator on 2016/7/9 0009.
*/

public class FirstFragment extends Fragment {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
/**
* 参数1：需要加载的布局文件
* 参数2：包裹此布局文件的父viewgroup
* 参数3：是否返回父viewGroup
*/
// View view = inflater.inflate(R.layout.first_fragment_view,container,false);
View view = inflater.inflate(R.layout.first_fragment_view,null);
TextView textView = (TextView) view.findViewById(R.id.first_textview);
textView.setText("我就日了狗了");
return view;
}
}

package com.example.myexercise;

import android.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
* Created by A
4000
dministrator on 2016/7/12 0012.
*/
public class SecondFragment extends Fragment {

//启动fragment->屏幕锁屏->屏幕解锁->切换到其他fragment->回到桌面->回到应用->退出fragment

/**
* 当fragment被添加到Activity时，会回调这个方法，并且只调用一次
*/
@Override
public void onAttach(Context context) {
Log.i("fragment1","onAttach");
super.onAttach(context);
}

/**
* 创建fragment时会回调此方法，并且只调用一次
* @param savedInstanceState
*/
@Override
public void onCreate(Bundle savedInstanceState) {
Log.i("fragment1","onCreate");
super.onCreate(savedInstanceState);
}

/**
* 当activity要得到fragment的layout时，调用此方法，fragment在其中创建自己的layout(界面)。
* @param inflater
* @param container
* @param savedInstanceState
* @return
*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.first_fragment_view,container,false);
TextView textView = (TextView) view.findViewById(R.id.first_textview);
textView.setText("我是fragment1");
Log.i("fragment1","onCreateView");
return view;
}

/**
* 当所在Activity启动完成后调用
* @param savedInstanceState
*/
@Override
public void onActivityCreated(Bundle savedInstanceState) {
Log.i("fragment1","onActivityCreated");
super.onActivityCreated(savedInstanceState);
}

/**
* 启动fragment
*/
@Override
public void onStart() {
Log.i("fragment1","onStart");
super.onStart();
}

/**
* 恢复fragment时会被回调，调用onstart（）方法后一定会调用onResume（）方法
*/
@Override
public void onResume() {
Log.i("fragment1","onResume");
super.onResume();
}

/**
* 暂停fragment时会回调此方法
*/
@Override
public void onPause() {
Log.i("fragment1","onPause");
super.onPause();
}

/**
* 停止fragment时会回调此方法
*/
@Override
public void onStop() {
Log.i("fragment1","onStop");
super.onStop();
}

/**
* 销毁fragment所包含的视图
*/
@Override
public void onDestroyView() {
Log.i("fragment1","onDestroyView");
super.onDestroyView();
}

/**
* 销毁fragment时回调
*/
@Override
public void onDestroy() {
Log.i("fragment1","onDestroy");
super.onDestroy();
}

/**
* 当fragment被从activity中删掉时被调用。
*/
@Override
public void onDetach() {
Log.i("fragment1","onDetach");
super.onDetach();
}
}

package com.example.myexercise;

import android.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
* Created by Administrator on 2016/7/12 0012.
*/
public class ThirdFragment extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
Log.i("fragment2","onCreate");
super.onCreate(savedInstanceState);
}

@Override
public void onAttach(Context context) {
Log.i("fragment2","onAttach");
super.onAttach(context);
}

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.first_fragment_view,container,false);
TextView textView = (TextView) view.findViewById(R.id.first_textview);
textView.setText("我是fragment2");
Log.i("fragment2","onCreateView");
return view;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
Log.i("fragment2","onActivityCreated");
super.onActivityCreated(savedInstanceState);
}

@Override
public void onStart() {
Log.i("fragment2","onStart");
super.onStart();
}

@Override
public void onResume() {
Log.i("fragment2","onResume");
super.onResume();
}

@Override
public void onPause() {
Log.i("fragment2","onPause");
super.onPause();
}

@Override
public void onStop() {
Log.i("fragment2","onStop");
super.onStop();
}

@Override
public void onDestroy() {
Log.i("fragment2","onDestroy");
super.onDestroy();
}

@Override
public void onDestroyView() {
Log.i("fragment2","onDestroyView");
super.onDestroyView();
}

@Override
public void onDetach() {
Log.i("fragment2","onDetach");
super.onDetach();
}
}

package com.example.myexercise;

import android.app.Activity;
import android.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

/**
* Created by Administrator on 2016/7/12 0012.
*/
public class FourthFragment extends Fragment {
private MyListener listener;
public interface MyListener{
void sendData(String aaa);
}

@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
super.onAttach(activity);
listener = (MyListener) activity;
listener.sendData("感谢你发送过来的数据包");
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.first_fragment_view,container,false);
TextView textView = (TextView) view.findViewById(R.id.first_textview);
textView.setText("我是fragment4");
String text = (String) getArguments().get("name");
textView.setText(text);
Toast.makeText(getActivity(),"成功接收到Activity发过来的数据",Toast.LENGTH_SHORT).show();
return view;
}

}

<pre name="code" class="plain"><?xml version="1.0" encoding="utf-8"?><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:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"android:orientation="vertical"tools:context="com.example.myexercise.MainActivity"><LinearLayoutandroid:id="@+id/content"android:layout_width="wrap_content"android:layout_height="0dp"android:orientation="vertical"android:layout_weight="5"></LinearLayout><RadioGroupandroid:id="@+id/my_radiogroup"android:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"android:orientation="horizontal"><RadioButtonandroid:id="@+id/first"android:layout_width="0dp"android:layout_weight="1"android:layout_height="match_parent"android:drawableTop="@mipmap/ic_launcher"android:text="静态"android:gravity="center"android:button="@null"/><RadioButtonandroid:id="@+id/second"android:layout_weight="1"android:layout_width="0dp"android:layout_height="match_parent"android:drawableTop="@mipmap/ic_launcher"android:text="动态"android:gravity="center"android:button="@null"/><RadioButtonandroid:id="@+id/third"android:layout_weight="1"android:layout_width="0dp"android:layout_height="match_parent"android:drawableTop="@mipmap/ic_launcher"android:text="静态"android:gravity="center"android:button="@null"/><RadioButtonandroid:id="@+id/fourth"android:layout_weight="1"android:layout_width="0dp"android:layout_height="match_parent"android:drawableTop="@mipmap/ic_launcher"android:text="静态"android:gravity="center"android:button="@null"/></RadioGroup></LinearLayout>

<pre name="code" class="plain"><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><TextViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="我是标题"android:gravity="center"/><!--通过静态加载时必须给id或者tag--><fragmentandroid:id="@+id/fist_fragment"android:layout_width="match_parent"android:layout_height="match_parent"android:name="com.example.myexercise.FirstFragment"android:tag="wocalei"tools:layout="@layout/first_fragment_view" /></LinearLayout>

first_fragment_view.xml:

<?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"android:gravity="center"android:id="@+id/layout"><TextViewandroid:id="@+id/first_textview"android:layout_width="match_parent"android:layout_height="wrap_content"android:gravity="center"android:text="我是静态的fragment"/><Buttonandroid:id="@+id/first_button"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="改变"/></LinearLayout>

main4.xml:

<pre name="code" class="plain"><?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"android:id="@+id/zzz"><EditTextandroid:id="@+id/edit"android:layout_width="match_parent"android:layout_height="wrap_content" /><Buttonandroid:id="@+id/send"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="发送数据"/></LinearLayout>