Fragment动态加载
代码
首先在activity中获取FragmentManager message = getFragmentManager();对象， 其次FragmentTransaction tion = message.beginTransaction(); 最后引用tion.replace(R.id.infos, new InfoFragment()).commit();
InfoFragment类：
public class InfoFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.invest, container, false);
return view ;
}
}
activity中代码：
package com.example.dynamicfragmentdemo;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.util.DisplayMetrics;
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//获取FragmentManager对象
FragmentManager fm = getSupportFragmentManager();
//获取FragmentTransaction对象
FragmentTransaction fr = fm.beginTransaction();
//这两步可以换成button其他之类的
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
if (dm.widthPixels>dm.heightPixels) {
InfoFragment info = new InfoFragment ();
fr.replace(R.id.rel, info).commit();
}
else{
ShopFragment shop= new ShopFragment();
fr.replace(R.id.rel, shop).commit();
}
}
}
另外的ShopFragment 可以参照InfoFragment
代码完毕
值得注意的是fr.replace();方法中第一个参数一定是与activity关联的布局id，并且使用replace方法必须提交------commit();
ps:replace()方法中第一个参数是代表你在界面上要显示的位置的控件ID。但必须是main布局中的，否则会出异常！