本文结合之前的动态创建fragment来进行一个实践,来实现用Fragment创建一个选项卡
本文地址:http://www.cnblogs.com/wuyudong/p/5898075.html ,转载请注明源地址。
项目布局
<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" tools:context=".MainActivity" > <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <TextView android:id="@+id/tab1" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="center" android:text="社会新闻" /> <TextView android:id="@+id/tab2" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="center" android:text="生活新闻" /> <TextView android:id="@+id/tab3" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="center" android:text="军事新闻" /> <TextView android:id="@+id/tab4" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="center" android:text="娱乐新闻" /> </LinearLayout> <LinearLayout android:id="@+id/content" android:layout_width="fill_parent" android:layout_height="fill_parent" > </LinearLayout> </LinearLayout>
新建Fragment1.java~Fragment4.java,其中Fragment1.java中的代码如下:
public class Fragment1 extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment1, null); } }
其他几个文件的代码类似
新建fragment1.xml~fragment4.xml,其中fragment1.xml中的代码如下:
<?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:gravity="center" android:orientation="vertical" > <TextView android:id="@+id/textview1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="社会新闻" android:textAppearance="?android:attr/textAppearanceLarge"/> </LinearLayout>
其他几个文件的代码类似
MainActivity.java中的代码如下:
public class MainActivity extends Activity implements OnClickListener { private LinearLayout content; private TextView tv1, tv2, tv3, tv4; private FragmentManager fm; private FragmentTransaction ft; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); content = (LinearLayout) findViewById(R.id.content); tv1 = (TextView) findViewById(R.id.tab1); tv2 = (TextView) findViewById(R.id.tab2); tv3 = (TextView) findViewById(R.id.tab3); tv4 = (TextView) findViewById(R.id.tab4); tv1.setOnClickListener(this); tv2.setOnClickListener(this); tv3.setOnClickListener(this); tv4.setOnClickListener(this); fm = getFragmentManager(); ft = fm.beginTransaction(); ft.replace(R.id.content, new Fragment1()); // 默认情况下Fragment1 } @Override public void onClick(View v) { ft = fm.beginTransaction(); switch (v.getId()) { case R.id.tab1: ft.replace(R.id.content, new Fragment1()); break; case R.id.tab2: ft.replace(R.id.content, new Fragment2()); break; case R.id.tab3: ft.replace(R.id.content, new Fragment3()); break; case R.id.tab4: ft.replace(R.id.content, new Fragment4()); break; default: break; } ft.commit(); } }
运行项目后如下效果: