>片段,碎片
public class BlueToothFragment extends Fragment {}
2. 重寫Fragment裏面的方法
顯示Fragment的ui,把佈局文件轉化成view對象
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.blue_tooth_layout, null);
}
3. 獲取Fragment管理器
fm = getFragmentManager();
4. 動態的修改界面
f1 = new BlueToothFragment();//先把要顯示的f1new出來
FragmentTransaction ft = fm.beginTransaction();//開啓事務
ft.replace(R.id.fl_container, f1);
ft.commit();
activity_main佈局
<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" >
<FrameLayout
android:id="@+id/fl_container"
android:layout_width="fill_parent"
android:layout_weight="1"
android:layout_height="0dip" >
</FrameLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#22000000"
android:orientation="horizontal" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="setting01"
android:text="藍牙設置" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="setting02"
android:text="聲音設置" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="setting03"
android:text="顯示設置" />
</LinearLayout>
</LinearLayout>
public class MainActivity extends Activity {
private FragmentManager fm;
BlueToothFragment f1;
SoundFragment f2;
ShowFragment f3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fm = getFragmentManager();
initFragment();
//默認加載 BlueToothFragment
FragmentTransaction ft = fm.beginTransaction();//開啓事務
ft.replace(R.id.fl_container, f1);
ft.commit();
}
private void initFragment() {
f1 = new BlueToothFragment();
f2 = new SoundFragment();
f3 = new ShowFragment();
}
//--------------- 3個點擊事件-------------------------
//點擊藍牙
public void setting01(View view) {
FragmentTransaction ft = fm.beginTransaction();//這裏要重新開啓,不能在上面定義成成員
ft.replace(R.id.fl_container, f1);
ft.commit();
}
//點擊聲音
public void setting02(View view) {
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.fl_container, f2);
ft.commit();
}
//點擊顯示
public void setting03(View view) {
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.fl_container, f3);
ft.commit();
}
}
public class BlueToothFragment extends Fragment {
//顯示Fragment的ui的
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.blue_tooth_layout, null);
}
}
Fragment的向下兼容
>使用support-v4的jar包
>1. MainActivity extends FragmentActivity
>2. 所有的fragment的導包, android.support.v4.app.Fragment
>3. getSupportFragmentManager();
>4. 注意兩個導包
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
public class MainActivity extends FragmentActivity {
private FragmentManager fm;
BlueToothFragment f1;
ShowFragment f3;
SoundFragment f2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//爲了向下兼容採用v4包裏面的FragmentManager
fm = getSupportFragmentManager();
initFragment();
//事務的概念
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.fl_container, f1);
ft.commit();//保證了 要麼同時成功,要麼同時失敗
}
private void initFragment() {
f1 = new BlueToothFragment();
f2 = new SoundFragment();
f3 = new ShowFragment();
}
public void setting01(View view) {
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.fl_container, f1);
ft.commit();
}
public void setting02(View view) {
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.fl_container, f2);
ft.commit();
}
public void setting03(View view) {
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.fl_container, f3);
ft.commit();
}
}