我正在使用Android Honeycomb中的兩個片段(Tab)。左邊是ListView
,右邊是從列表中選擇的項目的預覽。點擊其中一個按鈕時,我想在左側顯示不同的佈局。這怎麼可能?如何在片段內顯示不同的佈局
在此先感謝。
我正在使用Android Honeycomb中的兩個片段(Tab)。左邊是ListView
,右邊是從列表中選擇的項目的預覽。點擊其中一個按鈕時,我想在左側顯示不同的佈局。這怎麼可能?如何在片段內顯示不同的佈局
在此先感謝。
你可以做到這一點,我使用這些鏈接做了同樣的事情,這裏是我與你分享的代碼,希望它對你有所幫助......你首先必須創建4佈局。其中2個將用於橫向模式,一個用於縱向模式,另一個用於平板電腦。您必須爲佈局創建多個文件夾,其名稱應該類似於layout-xlarge
和layout-xlarge-port
,這樣您可以爲移動設備和平板電腦創建片段。
MasterFragment活動:
public class MasterFragment extends ListFragment {
Boolean isDualPane;
int position;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
ArrayList<String> parkNames = new ArrayList<String>();
for (Park park : Resort.PARKS) {
parkNames.add(park.getName());
}
setListAdapter(new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, parkNames));
View detailFrame = getActivity().findViewById(R.id.detail);
isDualPane = detailFrame != null && detailFrame.getVisibility() == View.VISIBLE;
if (savedInstanceState != null) {
position = savedInstanceState.getInt("position", 0);
}
if (isDualPane) {
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
showDetail(position);
}
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("position", position);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetail(position);
}
void showDetail(int position) {
this.position = position;
if (isDualPane) {
getListView().setItemChecked(position, true);
DetailFragment detailFragment = (DetailFragment) getFragmentManager()
.findFragmentById(R.id.detail);
if (detailFragment == null || detailFragment.getIndex() != position) {
detailFragment = new DetailFragment(position);
FragmentTransaction ft = getFragmentManager()
.beginTransaction();
ft.replace(R.id.detail, detailFragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
} else {
Intent intent = new Intent();
intent.setClass(getActivity(), DetailActivity.class);
intent.putExtra("position", position);
startActivity(intent);
}
}
}
次活動 - DetailFragment活動:
public class DetailActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.detail_act);
Bundle bundle = getIntent().getExtras();
int position = bundle.getInt("position");
System.out.println("RR : position is : " + position);
Integer[] images = { R.drawable.pic1, R.drawable.pic2, R.drawable.pic3,
R.drawable.pic4, R.drawable.pic5, R.drawable.pic6,
R.drawable.pic7, R.drawable.pic8, R.drawable.pic9,
R.drawable.pic10, R.drawable.pic11, R.drawable.pic12,
R.drawable.pic13 };
final ImageView imgview = (ImageView) findViewById(R.id.imageView1);
imgview.setImageResource(images[position]);
// DetailFragment detailFragment = new DetailFragment(position);
// FragmentManager fm = getSupportFragmentManager();
// FragmentTransaction ft =fm.beginTransaction();
// ft.add(android.R.id.content, detailFragment).commit();
}
}
現在,你必須創建第三個活動,MasterGridActivity
爲我的圖片,我現在用的顯示在片段GridView
。
public class MasterGridActivity extends Fragment {
Boolean isDualPane;
GridView gridView;
ListView listView;
int position;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.gridview, container, false);
gridView = (GridView) view.findViewById(R.id.gridViewImage);
gridView.setAdapter(new MyAdapter(view.getContext()));
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
View detailFrame = getActivity().findViewById(R.id.detail);
isDualPane = detailFrame != null && detailFrame.getVisibility() == View.VISIBLE;
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int pos, long arg3) {
if (!isDualPane) {
Intent intent = new Intent();
intent.setClass(getActivity(), DetailActivity.class);
intent.putExtra("position", pos);
startActivity(intent);
} else {
DetailFragment detailFragment = (DetailFragment) getFragmentManager().findFragmentById(R.id.detail);
if (detailFragment == null || detailFragment.getIndex() != pos) {
detailFragment = new DetailFragment(pos);
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.detail, detailFragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
}
}
});
super.onActivityCreated(savedInstanceState);
}
}
現在,這裏是我的形象適配器 - MyAdapter
- 我的圖像,其延伸的BaseAdapter
。
public class MyAdapter extends BaseAdapter {
private Context mContext;
public MyAdapter(Context c) {
mContext = c;
}
@Override
public int getCount() {
return mThumbIds.length;
}
@Override
public Object getItem(int arg0) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(100, 100));
imageView.setImageResource(mThumbIds[position]);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(0, 0, 0, 0);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
static Integer[] mThumbIds = { R.drawable.pic1, R.drawable.pic2,
R.drawable.pic3, R.drawable.pic4, R.drawable.pic5, R.drawable.pic6,
R.drawable.pic7, R.drawable.pic8, R.drawable.pic9,
R.drawable.pic10, R.drawable.pic11, R.drawable.pic12,
R.drawable.pic13,
};
}
現在我正在共享這些片段的XML文件。
main.xml中
<?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:orientation="horizontal">
<fragment
android:id="@+id/master"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="org.fragment.MasterGridActivity" />
</LinearLayout>
gridview.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gridViewImage"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:numColumns="auto_fit"
android:columnWidth="90dp"
android:horizontalSpacing="10dp"
android:verticalSpacing="10dp"
android:gravity="center"
android:stretchMode="columnWidth" />
</LinearLayout>
detail_fragment.xml:這個XML是用於示出在另一片段的細節。
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="8dp" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="8dp" />
</LinearLayout>
</ScrollView>
detail_act.xml
<?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:orientation="vertical" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="@drawable/ic_launcher" />
</LinearLayout>
使景觀模式和平板電腦相同的XML。它對我來說工作得很好。希望它對你有幫助。
您需要定義event callback to the activity活動回調。也就是說,您的左邊片段必須首先通知容器活動發生了一個事件(即選擇了一個列表項)。然後容器活動會將此信息傳遞給正確的片段,然後相應地更新其UI。
我可以更詳細地解釋這一點,但在互聯網上有幾個tutorials教這個。我建議你仔細閱讀一下them,因爲一旦你做了這個概念,這個概念就會變得更有意義。
可以請你加一些網址 – abi
我的帖子已經有3個鏈接了。 –
對不起,但我無法在程序中找到「DetailFragment」活動。 – Rumit
嗨,請按照我的回答這裏的帖子第二個活動是細節片段activity.you可以按照我的例子,像我發佈你會挑戰性地得到它的全部結果。 –
是的,我找不到「DetailFragment」! – NovusMobile