在res里边建drawable,drawable里边建selector下的sel_r.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<!--如果单选框被选中 就展示选中图片 -->
<item android:state_checked="true" android:drawable="@drawable/message_true"/>
<!-- 默认情况下展示 -->
<item android:drawable="@drawable/message_false"/>
</selector>
在drawable-hdpi里边放两张带圈的图形
1.布局：
activity_main.xml:
<LinearLayout 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:orientation="vertical" >
<!-- 1.修改布局为线性布局 -->
<!-- 2.写一个帧布局 -->
<FrameLayout
android:id="@+id/frag"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<!-- 3写 RadioGroup布局 -->
<RadioGroup
android:id="@+id/radioGroup1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<!-- android:button="@null"去掉单选框的框 -->
<RadioButton
android:id="@+id/radio0"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:button="@null"
android:drawableTop="@drawable/sel_r"
android:gravity="center"
android:text="首页" />
<RadioButton
android:id="@+id/radio1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:button="@null"
android:drawableTop="@drawable/sel_r"
android:gravity="center"
android:text="分类" />
<RadioButton
android:id="@+id/radio2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:button="@null"
android:drawableTop="@drawable/sel_r"
android:gravity="center"
android:text="发现" />
<RadioButton
android:id="@+id/radio3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:button="@null"
android:drawableTop="@drawable/sel_r"
android:gravity="center"
android:text="购物车" />
<RadioButton
android:id="@+id/radio4"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:button="@null"
android:drawableTop="@drawable/sel_r"
android:gravity="center"
android:text="我的" />
</RadioGroup>
</LinearLayout>
2.写五个不一样的frag.xml,在每个里面带上颜色，代码如下：
<?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="#f00"
android:orientation="horizontal" >
<Button
android:id="@+id/button1"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="Button" />
<Button
android:id="@+id/button2"
android:layout_width="0dp"
android:layout_weight="2"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>
3.主方法MainActivity里边写：
package com.qy.ccc;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import com.qy.ccc.frag.Frag_01;
import com.qy.ccc.frag.Frag_02;
import com.qy.ccc.frag.Frag_03;
import com.qy.ccc.frag.Frag_04;
import com.qy.ccc.frag.Frag_05;
public class MainActivity extends FragmentActivity {
private FragmentManager manager;
private Frag_01 frag_01;
private Frag_02 frag_02;
private Frag_03 frag_03;
private Frag_04 frag_04;
private Frag_05 frag_05;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 由于用是v4包所以 要继承FragmentActivity
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.radioGroup1);
// 选中第一个框
// radioGroup.getChildAt(0).getId()找选中的id
radioGroup.check(radioGroup.getChildAt(0).getId());
// 加载页面
// 获取管理者
manager = getSupportFragmentManager();
// 开启事务
FragmentTransaction transaction = manager.beginTransaction();
// 创建FRagment对象
frag_01 = new Frag_01();
frag_02 = new Frag_02();
frag_03 = new Frag_03();
frag_04 = new Frag_04();
frag_05 = new Frag_05();
// 添加fragment
transaction.add(R.id.frag, frag_01);
transaction.add(R.id.frag, frag_02);
transaction.add(R.id.frag, frag_03);
transaction.add(R.id.frag, frag_04);
transaction.add(R.id.frag, frag_05);
// 隐藏展示fragment
transaction.show(frag_01).hide(frag_02).hide(frag_03).hide(frag_04)
.hide(frag_05);
// 提交事务
transaction.commit();
//
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
FragmentTransaction shiwu = manager.beginTransaction();
switch (checkedId) {
case R.id.radio0:
shiwu.show(frag_01).hide(frag_02).hide(frag_03)
.hide(frag_04).hide(frag_05);
break;
case R.id.radio1:
shiwu.show(frag_02).hide(frag_01).hide(frag_03)
.hide(frag_04).hide(frag_05);
break;
case R.id.radio2:
shiwu.show(frag_03).hide(frag_02).hide(frag_01)
.hide(frag_04).hide(frag_05);
break;
case R.id.radio3:
shiwu.show(frag_04).hide(frag_02).hide(frag_03)
.hide(frag_01).hide(frag_05);
break;
case R.id.radio4:
shiwu.show(frag_05).hide(frag_02).hide(frag_03)
.hide(frag_04).hide(frag_01);
break;
}
shiwu.commit();
}
});
}
}
4.建frag包，在frag包里写五个不一样的Frag，每个Frag里边写代码如下：
package com.qy.ccc.frag;
import com.qy.ccc.R;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Frag_01 extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.frag_01, container, false);
return view;
}
}