是否可以访问内部类方法？
public class MenuFragment extends Fragment {
RelativeLayout fullLayout;
ImageView imgSettings;
public static ImageView imgTopZigzag, imgBottomZigzag;
MyPagerAdapter myPagerAdapter;
ProgressBar levelProgressBar;
TextView txtLevel, txtXp;
public static int screenWidth, screenHeight;
public static ViewPager mViewPager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.menu_fragment, null);
mViewPager = (ViewPager) rootView.findViewById(R.id.view_pager);
myPagerAdapter = new MyPagerAdapter(getChildFragmentManager());
mViewPager.setAdapter(myPagerAdapter);
fullLayout = (RelativeLayout) rootView.findViewById(R.id.rl_menu);
imgSettings = (ImageView) rootView.findViewById(R.id.img_settings);
imgSettings.bringToFront();
imgSettings.getLayoutParams().height = 100;
imgSettings.getLayoutParams().width = imgSettings.getLayoutParams().height;
imgTopZigzag = (ImageView) rootView.findViewById(R.id.img_top_zigzag);
imgBottomZigzag = (ImageView) rootView.findViewById(R.id.img_bottom_zigzag);
levelProgressBar = (ProgressBar) rootView.findViewById(R.id.progressLevel);
txtLevel = (TextView) rootView.findViewById(R.id.txt_level);
txtXp = (TextView) rootView.findViewById(R.id.txt_xp);
txtLevel.setTypeface(((MainActivity) getActivity()).typeface);
txtXp.setTypeface(((MainActivity) getActivity()).typeface);
Display display = getActivity().getWindowManager().getDefaultDisplay();
screenWidth = display.getWidth();
screenHeight = display.getHeight();
final Animation showMenu = new AlphaAnimation(0, 1);
showMenu.setDuration(600);
showMenu.setFillAfter(true);
final TranslateAnimation centerUpBack = new TranslateAnimation(0, 0, -screenHeight/3, -screenHeight/3 + screenHeight/10);
centerUpBack.setDuration(400);
centerUpBack.setFillAfter(true);
TranslateAnimation centerUp = new TranslateAnimation(0, 0, 0, -screenHeight/3);
centerUp.setDuration(1000);
centerUp.setFillAfter(true);
centerUp.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation arg0) {
}
@Override
public void onAnimationRepeat(Animation arg0) {
}
@Override
public void onAnimationEnd(Animation arg0) {
imgTopZigzag.startAnimation(centerUpBack);
mViewPager.setVisibility(View.VISIBLE);
mViewPager.startAnimation(showMenu);
}
});
final TranslateAnimation centerDownBack = new TranslateAnimation(0, 0, screenHeight/3, screenHeight/3 - screenHeight/10);
centerDownBack.setDuration(400);
centerDownBack.setFillAfter(true);
final TranslateAnimation centerDown = new TranslateAnimation(0, 0, 0, screenHeight/3);
centerDown.setDuration(1000);
centerDown.setFillAfter(true);
centerDown.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation arg0) {
}
@Override
public void onAnimationRepeat(Animation arg0) {
}
@Override
public void onAnimationEnd(Animation arg0) {
imgBottomZigzag.startAnimation(centerDownBack);
}
});
imgTopZigzag.startAnimation(centerUp);
imgBottomZigzag.startAnimation(centerDown);
updateLevelBar();
mViewPager.getLayoutParams().width = screenWidth;
mViewPager.getLayoutParams().height = mViewPager.getLayoutParams().width*17/25;
return rootView;
}
public void updateLevelBar() {
levelProgressBar.setMax(((MainActivity) getActivity()).level * 150);
levelProgressBar.setProgress(((MainActivity) getActivity()).xp);
txtLevel.setText("Level " + ((MainActivity) getActivity()).level);
txtXp.setText(((MainActivity) getActivity()).xp + " / " + ((MainActivity) getActivity()).level * 150 + " xp");
}
public static class FragmentMenu extends Fragment {
LinearLayout innerMenuLayout;
TextView classicHighscore, zenHighscore;
ImageButton btnPlayLast, btnLeaderboard;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.menu_tab, container, false);
innerMenuLayout = (LinearLayout) rootView.findViewById(R.id.linearLayout);
innerMenuLayout.getLayoutParams().width = screenWidth*17/25;
btnPlayLast = (ImageButton) rootView.findViewById(R.id.btn_play_last);
btnLeaderboard = (ImageButton) rootView.findViewById(R.id.btn_leaderboard);
classicHighscore = (TextView) rootView.findViewById(R.id.txt_classic_highscore);
zenHighscore = (TextView) rootView.findViewById(R.id.txt_zen_highscore);
classicHighscore.setTypeface(((MainActivity) getActivity()).typeface);
zenHighscore.setTypeface(((MainActivity) getActivity()).typeface);
final TranslateAnimation openTopLeaderboard = new TranslateAnimation(0, 0, - screenHeight/3 + screenHeight/10, -screenHeight/2 - 50);
openTopLeaderboard.setDuration(800);
openTopLeaderboard.setFillAfter(true);
final TranslateAnimation openBottomLeaderboard = new TranslateAnimation(0, 0, screenHeight/3 - screenHeight/10, screenHeight/2 + 50);
openBottomLeaderboard.setDuration(800);
openBottomLeaderboard.setFillAfter(true);
final Animation leaderboard = new AlphaAnimation(1, 0);
leaderboard.setDuration(800);
leaderboard.setFillAfter(true);
leaderboard.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
imgTopZigzag.startAnimation(openTopLeaderboard);
imgBottomZigzag.startAnimation(openBottomLeaderboard);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
((MainActivity) getActivity()).startLeaderboard();
MenuFragment.FragmentMenuPlay fragment = (MenuFragment.FragmentMenuPlay) getChildFragmentManager().findFragmentById(R.id.fragmentView);
fragment.buttonsSetClickable();
}
});
btnLeaderboard.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mViewPager.startAnimation(leaderboard);
MenuFragment.FragmentMenuPlay fragment = (MenuFragment.FragmentMenuPlay) getChildFragmentManager().findFragmentById(R.id.fragmentView);
fragment.buttonsSetUnclickable();
}
});
updateHighscores();
return rootView;
}
public void updateHighscores() {
SharedPreferences prefs = getContext().getSharedPreferences("com.thematus.twinz", Context.MODE_PRIVATE);
int classic_highscore = prefs.getInt("classic_highscore", 0);
int zen_highscore = prefs.getInt("zen_highscore", 0);
classicHighscore.setText(classic_highscore + "");
zenHighscore.setText(zen_highscore + "");
}
}
public static class FragmentMenuPlay extends Fragment {
LinearLayout innerMenuLayout;
ImageButton btnClassicMode, btnZenMode, btnLocalMulti;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.menu_play_tab, container, false);
innerMenuLayout = (LinearLayout) rootView.findViewById(R.id.linearLayout);
innerMenuLayout.getLayoutParams().width = screenWidth*17/25;
btnClassicMode = (ImageButton) rootView.findViewById(R.id.btn_classic_mode);
btnZenMode = (ImageButton) rootView.findViewById(R.id.btn_zen_mode);
btnLocalMulti = (ImageButton) rootView.findViewById(R.id.btn_local_multi);
final TranslateAnimation closeMenuTop = new TranslateAnimation(0, 0, - screenHeight/3 + screenHeight/10, 0);
closeMenuTop.setDuration(300);
closeMenuTop.setFillAfter(true);
final TranslateAnimation closeMenuBottom = new TranslateAnimation(0, 0, screenHeight/3 - screenHeight/10, 0);
closeMenuBottom.setDuration(300);
closeMenuBottom.setFillAfter(true);
final Animation hideMenuClassic = new ScaleAnimation(1f, 0.2f, 1f, 0.2f, Animation.RELATIVE_TO_SELF, (float) 0.5, Animation.RELATIVE_TO_SELF, (float) 0.5);
hideMenuClassic.setDuration(300);
hideMenuClassic.setFillAfter(true);
hideMenuClassic.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
imgTopZigzag.startAnimation(closeMenuTop);
imgBottomZigzag.startAnimation(closeMenuBottom);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
((MainActivity) getActivity()).startClassicMode();
buttonsSetClickable();
}
});
btnClassicMode.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mViewPager.startAnimation(hideMenuClassic);
buttonsSetUnclickable();
}
});
final Animation hideMenuZen = new ScaleAnimation(1f, 0.2f, 1f, 0.2f, Animation.RELATIVE_TO_SELF, (float) 0.5, Animation.RELATIVE_TO_SELF, (float) 0.5);
hideMenuZen.setDuration(300);
hideMenuZen.setFillAfter(true);
hideMenuZen.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
imgTopZigzag.startAnimation(closeMenuTop);
imgBottomZigzag.startAnimation(closeMenuBottom);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
((MainActivity) getActivity()).startZenMode();
buttonsSetClickable();
}
});
btnZenMode.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mViewPager.startAnimation(hideMenuZen);
buttonsSetUnclickable();
}
});
final Animation hideMenuLocalMulti = new ScaleAnimation(1f, 0.2f, 1f, 0.2f, Animation.RELATIVE_TO_SELF, (float) 0.5, Animation.RELATIVE_TO_SELF, (float) 0.5);
hideMenuLocalMulti.setDuration(300);
hideMenuLocalMulti.setFillAfter(true);
hideMenuLocalMulti.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
imgTopZigzag.startAnimation(closeMenuTop);
imgBottomZigzag.startAnimation(closeMenuBottom);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
((MainActivity) getActivity()).startLocalMulti();
buttonsSetClickable();
}
});
btnLocalMulti.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mViewPager.startAnimation(hideMenuLocalMulti);
buttonsSetUnclickable();
}
});
return rootView;
}
public void buttonsSetClickable() {
btnClassicMode.setClickable(true);
btnZenMode.setClickable(true);
btnLocalMulti.setClickable(true);
}
public void buttonsSetUnclickable() {
btnClassicMode.setClickable(false);
btnZenMode.setClickable(false);
btnLocalMulti.setClickable(false);
}
}
class MyPagerAdapter extends FragmentPagerAdapter {
public MyPagerAdapter(FragmentManager fragmentManager){
super(fragmentManager);
}
@Override
public android.support.v4.app.Fragment getItem(int position) {
switch(position){
case 0:
FragmentMenu fm = new FragmentMenu();
return fm;
case 1:
FragmentMenuPlay fmp = new FragmentMenuPlay();
return fmp;
}
return null;
}
@Override
public int getCount() {
return 2;
}
}
}
有什么办法吗？我尝试通过
调用它MenuFragment.FragmentMenu fragment = (MenuFragment.FragmentMenu) getChildFragmentManager()
.findFragmentById(R.id.viewPager);
fragment.method();
但这会返回空指针异常。
问题还在于我正在使用带有内部类（片段）的视图寻呼机。
感谢您的回复！
答案 0 :(得分：0)
我通过在适配器中公开片段来修复它，所以我在顶部定义它，所以我能够创建一个片段void，它从每个内部类运行void，如：
public void doSomething() {
definedFragment.void();
}
在第二个片段的内部，只是：
Fragment fragment = (Fragment) getActivity().getSupportFragmentManager().findFragmentById(R.id.fragmentView);
fragment.doSomething();