由于看客的要求，我就把读者所要的写出来。
由于上一篇是每一个Fragment 实例了同一个layout.xml ，造成了读者的困惑，这篇我就让每一个Fragment 加载一个不同的layout.xml.
首先我们要准备四个layout.xml ，用来给每个点击跳转页面。
第一个fg_contnet.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:background="@color/cornsilk"
android:orientation="vertical" > <TextView
android:id="@+id/txt_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="第一个"
android:textColor="@android:color/holo_green_light"
android:textSize="20sp"/> </LinearLayout>
第二个fg_contnet2.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:background="@color/cornsilk"
android:gravity="center_vertical"
android:orientation="vertical" > <TextView
android:id="@+id/txt_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="第二个"
android:textColor="@android:color/holo_green_light"
android:textSize="20sp"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Load。。。。"
/>
</LinearLayout>
第三个 fg_content3.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:background="@color/cornsilk"
android:orientation="vertical" > <ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher"
/> </LinearLayout>
第四个 fg_content4.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:background="@color/cornsilk"
android:orientation="vertical" > <TimePicker
android:id="@+id/timePicker1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" /> </LinearLayout>
因为要每个Fragemnt 加载一个layout.xml ，所以MyFragment 也要修改：
我们在构造器中传入一个content_layout.xml ,动态改变FragmentLayout.
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup; public class MyFragment extends Fragment{
private int content_layout;
public MyFragment(int content) {
this.content_layout = content;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(content_layout,container,false);
return view;
}
}
最后在MainActivity 中：
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.TextView; public class MainActivity extends Activity implements View.OnClickListener{ //UI Object
private TextView txt_channel;
private TextView txt_message;
private TextView txt_better;
private TextView txt_setting; //Fragment Object
private MyFragment fg1,fg2,fg3,fg4;
private FragmentManager fManager; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
fManager = getFragmentManager();
bindViews();
txt_channel.performClick(); //模拟一次点击，既进去后选择第一项
} //UI组件初始化与事件绑定
private void bindViews() {
txt_channel = (TextView) findViewById(R.id.txt_channel);
txt_message = (TextView) findViewById(R.id.txt_message);
txt_better = (TextView) findViewById(R.id.txt_better);
txt_setting = (TextView) findViewById(R.id.txt_setting); txt_channel.setOnClickListener(this);
txt_message.setOnClickListener(this);
txt_better.setOnClickListener(this);
txt_setting.setOnClickListener(this);
} //重置所有文本的选中状态
private void setSelected(){
txt_channel.setSelected(false);
txt_message.setSelected(false);
txt_better.setSelected(false);
txt_setting.setSelected(false);
} //隐藏所有Fragment
private void hideAllFragment(FragmentTransaction fragmentTransaction){
if(fg1 != null)fragmentTransaction.hide(fg1);
if(fg2 != null)fragmentTransaction.hide(fg2);
if(fg3 != null)fragmentTransaction.hide(fg3);
if(fg4 != null)fragmentTransaction.hide(fg4);
} @Override
public void onClick(View v) {
FragmentTransaction fTransaction = fManager.beginTransaction();
hideAllFragment(fTransaction);
switch (v.getId()){
case R.id.txt_channel:
setSelected();
txt_channel.setSelected(true);
if(fg1 == null){
fg1 = new MyFragment(R.layout.fg_content);
fTransaction.add(R.id.ly_content,fg1);
}else{
fTransaction.show(fg1);
}
break;
case R.id.txt_message:
setSelected();
txt_message.setSelected(true);
if(fg2 == null){
fg2 = new MyFragment(R.layout.fg_content2);
fTransaction.add(R.id.ly_content,fg2);
}else{
fTransaction.show(fg2);
}
break;
case R.id.txt_better:
setSelected();
txt_better.setSelected(true);
if(fg3 == null){
fg3 = new MyFragment(R.layout.fg_content3);
fTransaction.add(R.id.ly_content,fg3);
}else{
fTransaction.show(fg3);
}
break;
case R.id.txt_setting:
setSelected();
txt_setting.setSelected(true);
if(fg4 == null){
fg4 = new MyFragment(R.layout.fg_content4);
fTransaction.add(R.id.ly_content,fg4);
}else{
fTransaction.show(fg4);
}
break;
}
fTransaction.commit();
}
}
最后看一下效果：
谢谢大家的关注~ Can't get is forever, forget was once. ----到不了的就是永远， 忘不了的就是曾经。