[英]Programmatically add buttons to a Fragment
我創建了一個帶有可滾動標簽的項目。 每個選項卡都由一個片段聲明。 現在我希望fe Fragment1中有8個按鈕,Fragment2 4個按鈕,依此類推。 我想要行,每行最多包含三個按鈕,因此,如果我生成4個按鈕,則應該在其中一行包含3個按鈕,並在其中一行包含1個按鈕。 所以這就是我制作滾動標簽的方式:
我的Main_Activity.java
public class MainActivity extends FragmentActivity {
ViewPager viewPager = null;
SoundPlayer sp = new SoundPlayer();
protected void onCreate(Bundle savedInstanceStats)
{
super.onCreate(savedInstanceStats);
setContentView(R.layout.homescreen);
viewPager = (ViewPager) findViewById(R.id.pager);
FragmentManager fragmentManager = getSupportFragmentManager();
viewPager.setAdapter(new MyAdapter(fragmentManager));
}
}
class MyAdapter extends FragmentPagerAdapter
{
public MyAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
Fragment fragment = null;
if(position == 0)
fragment = new FragmentDominik();
else if(position == 1)
fragment = new FragmentTobias();
else if(position == 2)
fragment = new FragmentTom();
else if(position == 3)
fragment = new FragmentNikolas();
else if(position == 4)
fragment = new FragmentGroups();
else if(position == 5)
fragment = new FragmentOthers();
else if(position == 6)
fragment = new FragmentFavorites();
return fragment;
}
@Override
public int getCount() {
return 7;
}
public CharSequence getPageTitle(int position)
{
String title = new String();
if(position == 0)
return "Dominik";
else if(position == 1)
return "Tobias";
else if(position == 2)
return "Tom";
else if(position == 3)
return "Nikolas";
else if(position == 4)
return "Groups";
else if(position == 5)
return "Others";
else if(position == 6)
return "Favorites";
return null;
}
}
我的homescreen.xml
<android.support.v4.view.ViewPager
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:id="@+id/pager"
android:layout_height="match_parent">
<android.support.v4.view.PagerTitleStrip
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/title"
android:layout_gravity="top"
android:paddingTop="4dp"
android:paddingBottom="4dp"
android:background="#4052b5"
android:focusableInTouchMode="true"
android:textColor="#ffffff"/>
</android.support.v4.view.ViewPager>
一個示例Fragment.java
public class FragmentTobias extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.tobias, container, false);
}
}
一個示例Fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#d1d1d1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/textView3"
android:layout_gravity="center_horizontal" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Tobias"
android:id="@+id/textView7"
android:layout_gravity="center_horizontal" />
</LinearLayout>
所以現在,如果我想在FragmentTobias.java中以語法方式在tobias.xml中產生8個按鈕,我該怎么做? 我是創建Android應用程序的新手,因此感謝您的幫助。
EDIT1:
LinearLayout linearLayout = new LinearLayout(getActivity());
LinearLayout.LayoutParams params1 = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
linearLayout.setLayoutParams(params1);
linearLayout.setOrientation(LinearLayout.HORIZONTAL); //or VERTICAL
LinearLayout.LayoutParams params2 = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
Button button = new Button(getActivity());
button.setLayoutParams(params2);
Button button2 = new Button(getActivity());
button2.setLayoutParams(params2);
//like this, add all buttons and other views
//you can use a loop for adding multiple similar views
linearLayout.addView(button);
linearLayout.addView(button2);
container.addView(linearLayout);
您可以向ViewGroup
動態添加按鈕,並使用它來為視圖添加視圖。 試試下面的代碼,
public class FragmentTobias extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
LinearLayout linearLayout = new LinearLayout(getActivity());
LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
linearLayout.setLayoutParams(layoutParams);
linearLayout.setOrientation(LinearLayout.HORIZONTAL); //or VERTICAL
LayoutParams buttonParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
Button button = new Button(getActivity());
button.setLayoutParams(buttonParams);
Button button2 = new Button(getActivity());
button2.setLayoutParams(buttonParams);
linearLayout.addView(button);
linearLayout.addView(button2);
//like this, add all buttons and other views
//you can use a loop for adding multiple similar views
container.addView(linearLayout);
View view = inflater.inflate(R.layout.tobias, container, false);
return view;
}
}
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