package com.zmcorp.weightcalculator;
import android.app.Activity//新加这一句
importandroid.support.v7.app.ActionBarActivity;
importandroid.support.v7.app.ActionBar;
importandroid.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null){
getSupportFragmentManager().beginTransaction()
.add(R.id.container, newPlaceholderFragment()).commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if itis present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action barwill
// automatically handle clicks on the Home/Up button, solong
// as you specify a parent activity inAndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public static class PlaceholderFragmentextends Fragment {
public PlaceholderFragment(){
}
@Override
public View onCreateView(LayoutInflaterinflater, ViewGroup container,
Bundle savedInstanceState){
View rootView =inflater.inflate(R.layout.fragment_main, container,
false);
return rootView;
}
}
}
一种最完全的改造方法就是:把两个XML文件都删除掉,还有默认的JAVA文件也删除掉,自己重新新建个main.xml文件和MainActivity.java的文件。