android工程中的activity_main fragment_main.xml是如何关联的
我用的是sdk4.X
创建工程后发现layout下不止有一个配置文件:activity_main fragment_main.xml,我想要添加按钮盒文本框,但是在fragment.xml
下添加后,在MainActivity.java中添加了相应的代码,后发现还是没显示出来,应该是需要在activity_main.xml中导入fragment_main.xml吧,查了半天没查到,MainActivity.java:
package com.example.ee;
import android.app.Activity;
import android.app.ActionBar;
import android.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.widget.Button;
import android.widget.TextView;
import android.os.Build;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView myTextview = (TextView)findViewById(R.id.myTextview);
Button myButton = (Button)findViewById(R.id.myButton);
myTextview.setText("我的第一个TextView");
myButton.setText("我的第一个Button");
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container,
false);
return rootView;
}
}
}
fragment_main.xml:
<RelativeLayout 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"
tools:context="com.example.ee.MainActivity$PlaceholderFragment" >
<TextView
android:id="@+id/myTextview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<Button
android:id="@+id/myButton"
android:layout_width="fill_parent"
android:layout_height ="wrap_content"/>
</RelativeLayout>
activity_main.xml:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.ee.MainActivity"
tools:ignore="MergeRootFrame">
<fragment
android:id="@+id/fragement_main"
android:name="net.loonggg.fragment.FragmentMain"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="10" />
</FrameLayout>
大家帮我看看我错在哪儿或者遗漏了什么,谢谢了!