我有 android 项目，其中 ListClass 有一个 Listview。单击 Listview 的一个项目时 - 打开 CardFlipActivity ，其中包含两个片段，这些片段设置为被视为翻页动作。我需要在顶部片段上播放视频并在 CardFlipActivity 的底部片段中显示图像
1）如何从ListClass中的listview项切换位置传递（原始文件夹视频文件和图像文件）的字符串以检索以显示在CardFlipActivity的片段中。
列表类代码：
public class ListClass extends ListActivity {
static final String VIDEO_PATH = null;
static final String IMAGE_PATH = null;
static final String VIDEO_NAME = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// storing string resources into ArrayList
String[] coronary_pathology_clips = getResources().getStringArray(R.array.coronary_pathology_clips);
ArrayList<String> coronary_pathology_clipsList = new ArrayList<String>(Arrays.asList(coronary_pathology_clips));
// Binding resources ArrayList to CathListAdapter
setListAdapter(new CathListAdapter(this,R.layout.list_item, coronary_pathology_clipsList));
getListView().setBackgroundColor(Color.GRAY);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
change(position);
}
void change(int position){
String selectedValue = (String) getListAdapter().getItem(position);
Toast.makeText(this, selectedValue, Toast.LENGTH_SHORT).show();
Intent intent = new Intent(getApplicationContext(), CardFlipActivity.class);
switch(position){
case 0 :
String path1 = "android.resource://" + getPackageName() + "/" + R.raw.video1;
String path1a = "android.resource://" + getPackageName() + "/" + R.raw.image1;
intent.putExtra (VIDEO_PATH, path1);
intent.putExtra (IMAGE_PATH, path1a);
break;
case 1 :
String path2 = "android.resource://" + getPackageName() + "/" + R.raw.video2;
String path2a = "android.resource://" + getPackageName() + "/" + R.raw.image2;
intent.putExtra (VIDEO_PATH, path2);
intent.putExtra (IMAGE_PATH, path2a);
break;
}
Bundle dataBundle = new Bundle();
dataBundle.putString("VIDEO_NAME", selectedValue);
intent.putExtras(dataBundle);
startActivity(intent);
}
}
CardFlip活动代码
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.NavUtils;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class CardFlipActivity extends Activity
implements FragmentManager.OnBackStackChangedListener {
private Handler mHandler = new Handler();
private boolean mShowingBack = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_card_flip);
if (savedInstanceState == null) {
// If there is no saved instance state, add a fragment representing the
// front of the card to this activity. If there is saved instance state,
// this fragment will have already been added to the activity.
getFragmentManager()
.beginTransaction()
.add(R.id.container, new CardFrontFragment())
.commit();
} else {
mShowingBack = (getFragmentManager().getBackStackEntryCount() > 0);
}
// Monitor back stack changes to ensure the action bar shows the appropriate
// button (either "photo" or "info").
getFragmentManager().addOnBackStackChangedListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
// Add either a "photo" or "finish" button to the action bar, depending on which page
// is currently selected.
MenuItem item = menu.add(Menu.NONE, R.id.action_flip, Menu.NONE,
mShowingBack
? R.string.action_photo
: R.string.action_info);
item.setIcon(mShowingBack
? R.drawable.ic_action_photo
: R.drawable.ic_action_info);
item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// Navigate "up" the demo structure to the launchpad activity.
// See http://developer.android.com/design/patterns/navigation.html for more.
NavUtils.navigateUpTo(this, new Intent(this, ListClass.class));
return true;
case R.id.action_flip:
flipCard();
return true;
}
return super.onOptionsItemSelected(item);
}
private void flipCard() {
if (mShowingBack) {
getFragmentManager().popBackStack();
return;
}
// Flip to the back.
mShowingBack = true;
// Create and commit a new fragment transaction that adds the fragment for the back of
// the card, uses custom animations, and is part of the fragment manager's back stack.
getFragmentManager()
.beginTransaction()
.setCustomAnimations(
R.animator.card_flip_right_in, R.animator.card_flip_right_out,
R.animator.card_flip_left_in, R.animator.card_flip_left_out)
.replace(R.id.container, new CardBackFragment())
.addToBackStack(null)
.commit();
mHandler.post(new Runnable() {
@Override
public void run() {
invalidateOptionsMenu();
}
});
}
@Override
public void onBackStackChanged() {
mShowingBack = (getFragmentManager().getBackStackEntryCount() > 0);
// When the back stack changes, invalidate the options menu (action bar).
invalidateOptionsMenu();
}
/*A fragment representing the frontcard.*/
public static class CardFrontFragment extends Fragment {
public CardFrontFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_card_front, container, false);
}
}
/*A fragment representing the back card.*/
public static class CardBackFragment extends Fragment {
public CardBackFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_card_back, container, false);
}
}
}