在我的项目中，我将片段用于交换屏幕，当新屏幕出现时，在后台自动播放音频。如何实现这一点请帮助...
public class Main extends FragmentActivity{
private PagerAdapter mPagerAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.view);
this.initialisePaging();
}
private void initialisePaging()
{
List<Fragment> fragments = new Vector<Fragment>();
fragments.add(Fragment.instantiate(this, Tab1Fragment1.class.getName()));
fragments.add(Fragment.instantiate(this, Tab1Fragment2.class.getName()));
fragments.add(Fragment.instantiate(this, Tab1Fragment3.class.getName()));
fragments.add(Fragment.instantiate(this, Tab1Fragment4.class.getName()));
fragments.add(Fragment.instantiate(this, Tab1Fragment5.class.getName()));
fragments.add(Fragment.instantiate(this, Tab1Fragment6.class.getName()));
this.mPagerAdapter = new PagerAdapter(super.getSupportFragmentManager(), fragments);
ViewPager pager = (ViewPager)super.findViewById(R.id.viewpager);
pager.setAdapter(this.mPagerAdapter);
}
}
这是pagerview....
package com.example.swape;
import java.util.List;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class PagerAdapter extends FragmentPagerAdapter {
private List<Fragment> fragments;
public PagerAdapter(FragmentManager fm, List<Fragment> fragments) {
super(fm);
this.fragments = fragments;
}
@Override
public Fragment getItem(int position) {
return this.fragments.get(position);
}
@Override
public int getCount() {
return this.fragments.size();
}
}
这是显示带有文本的图片并在背景中播放音频的片段屏幕....
package com.example.swape;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
//import com.andy.R;
public class Tab1Fragment1 extends Fragment {
String str = "DEATH WARENT";
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.tab_frag1_layout1,
container, false);
TextView tv = (TextView)view.findViewById(R.id.tv1);
// Button playsong = (Button)view.findViewById(R.id.play);
tv.setText("Android introduced fragments in Android 3.0 (API level 11), " +
"primarily to support more dynamic and flexible UI designs on large screens, such as tablets. " +
"Because a tablet's screen is much larger " +
"than that of a handset, there's more room to combine and interchange UI components.");
//myStartPreview();
// myStopPreview();
// playsong.setOnClickListener(new View.OnClickListener() {
//
// public void onClick(View arg0) {
// // TODO Auto-generated method stub
//
//
//
// Log.e("","Start==hh"+str);
// }
//
//
// });
return view;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
Log.e("","StartAttach=="+str);
}
// @Override
public void myStartPreview( View view) {
Log.e("","StartPreview=="+str);
}
public void myStopPreview(View view){
Log.e("","StopPreview=="+str);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.e("","StartCreated=="+str);
}
@Override
public void onStart(){
super.onStart();
Log.e("","Start=="+str);
}
@Override
public void onResume(){
super.onResume();
Log.e("","Resume=="+str);
}
@Override
public void onPause(){
super.onPause();
Log.e("","Pause=="+str);
}
@Override
public void onDestroy(){
super.onDestroy();
Log.e("","Destroy=="+str);
}
}
这是我使用的概念的示例代码...