1.获取到FragmentManager，在Activity中可以直接通过getFragmentManager得到。
2.开启一个事务，通过调用beginTransaction方法开启。
3.向容器内加入Fragment，一般使用replace方法实现，需要传入容器的id和Fragment的实例。
4.提交事务，调用commit方法提交。
fragment1 的布局
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<?
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
=
"#ff00ff"
android:orientation
=
"vertical"
>
<
TextView
android:id
=
"@+id/fr1"
android:layout_width
=
"fill_parent"
android:layout_height
=
"wrap_content"
android:gravity
=
"center_horizontal"
android:text
=
"fragment1"
/>
</
LinearLayout
>
fragment2的布局
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<?
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
=
"#0000ff"
android:orientation
=
"vertical"
>
<
TextView
android:id
=
"@+id/fr2"
android:layout_width
=
"match_parent"
android:layout_height
=
"wrap_content"
android:gravity
=
"center_horizontal"
android:text
=
"fragment2"
android:textColor
=
"#ffffff"
/>
</
LinearLayout
>
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package
com.sanya.dynamicfragment;
import
android.os.Bundle;
import
android.support.v4.app.Fragment;
import
android.view.LayoutInflater;
import
android.view.View;
import
android.view.ViewGroup;
public
class
Fragment1
extends
Fragment {
@Override
public
View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return
inflater.inflate(R.layout.fragment1, container,
false
);
}
}
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package
com.sanya.dynamicfragment;
import
android.os.Bundle;
import
android.support.v4.app.Fragment;
import
android.view.LayoutInflater;
import
android.view.View;
import
android.view.ViewGroup;
public
class
Fragment2
extends
Fragment {
@Override
public
View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return
inflater.inflate(R.layout.fragment2, container,
false
);
}
}
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package
com.sanya.dynamicfragment;
import
android.os.Bundle;
import
android.support.v4.app.FragmentActivity;
import
android.support.v4.app.FragmentManager;
import
android.support.v4.app.FragmentTransaction;
import
android.view.Display;
public
class
MainActivity
extends
FragmentActivity {
@Override
protected
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
Display display = getWindowManager().getDefaultDisplay();
int
height = display.getHeight();
int
width = display.getWidth();
if
(width > height) {
transaction.replace(android.R.id.content,
new
Fragment1());
}
else
{
transaction.replace(android.R.id.content,
new
Fragment2());
}
transaction.commit();
}
}
来自为知笔记(Wiz)
转载于:https://www.cnblogs.com/feelbest/p/3696204.html
相关资源：数据结构—成绩单生成器
