Java Fragment.getFragmentManager方法代码示例

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
/**
 * 获取目标fragment的前一个fragment
 *
 * @param destFragment 目标fragment
 * @return 目标fragment的前一个fragment
 */
public static Fragment getPreFragment(@NonNull final Fragment destFragment) {
    FragmentManager fragmentManager = destFragment.getFragmentManager();
    if (fragmentManager == null) return null;
    List<Fragment> fragments = getFragments(fragmentManager);
    boolean flag = false;
    for (int i = fragments.size() - 1; i >= 0; --i) {
        Fragment fragment = fragments.get(i);
        if (flag && fragment != null) {
            return fragment;
        }
        if (fragment == destFragment) {
            flag = true;
        }
    }
    return null;
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
/**
 * 获取目标fragment的前一个fragment
 *
 * @param destFragment 目标fragment
 * @return 目标fragment的前一个fragment
 */
public static Fragment getPreFragment(@NonNull Fragment destFragment) {
    FragmentManager fragmentManager = destFragment.getFragmentManager();
    if (fragmentManager == null) return null;
    List<Fragment> fragments = getFragments(fragmentManager);
    boolean flag = false;
    for (int i = fragments.size() - 1; i >= 0; --i) {
        Fragment fragment = fragments.get(i);
        if (flag && fragment != null) {
            return fragment;
        }
        if (fragment == destFragment) {
            flag = true;
        }
    }
    return null;
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
/**
 * 获取目标fragment的前一个fragment
 *
 * @param destFragment 目标fragment
 * @return 目标fragment的前一个fragment
 */
public static Fragment getPreFragment(@NonNull Fragment destFragment) {
    FragmentManager fragmentManager = destFragment.getFragmentManager();
    if (fragmentManager == null)
        return null;
    List<Fragment> fragments = getFragments(fragmentManager);
    boolean flag = false;
    for (int i = fragments.size() - 1; i >= 0; --i) {
        Fragment fragment = fragments.get(i);
        if (flag && fragment != null) {
            return fragment;
        }
        if (fragment == destFragment) {
            flag = true;
        }
    }
    return null;
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
/**
 * 获取目标Fragment的前一个SupportFragment
 *
 * @param fragment 目标Fragment
 */
public static ISupportFragment getPreFragment(Fragment fragment) {
    FragmentManager fragmentManager = fragment.getFragmentManager();
    if (fragmentManager == null) return null;

    List<Fragment> fragmentList = FragmentationHack.getActiveFragments(fragmentManager);
    if (fragmentList == null) return null;

    int index = fragmentList.indexOf(fragment);
    for (int i = index - 1; i >= 0; i--) {
        Fragment preFragment = fragmentList.get(i);
        if (preFragment instanceof ISupportFragment) {
            return (ISupportFragment) preFragment;
        }
    }
    return null;
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
@Override
public void setPrimaryItem(ViewGroup container, int position, Object object) {
    Fragment fragment = (Fragment)object;
    if (fragment != mCurrentPrimaryItem) {
        if (mCurrentPrimaryItem != null) {
            mCurrentPrimaryItem.setMenuVisibility(false);
            mCurrentPrimaryItem.setUserVisibleHint(false);
        }
        if (fragment != null) {
            fragment.setMenuVisibility(true);
            if(fragment.getFragmentManager() == null) {
                Log.v(TAG, "fragment manager == null item #"+position+": f="+object);
            }
            fragment.setUserVisibleHint(true);
        }
        mCurrentPrimaryItem = fragment;
    }
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
/**
 * Gets the previous fragment of the target fragment
 *
 * @param destFragment Target fragment
 * @return The previous fragment of the target fragment
 */
public static Fragment getPreFragment(@NonNull Fragment destFragment) {
    FragmentManager fragmentManager = destFragment.getFragmentManager();
    if (fragmentManager == null)
        return null;
    List<Fragment> fragments = getFragments(fragmentManager);
    boolean flag = false;
    for (int i = fragments.size() - 1; i >= 0; --i) {
        Fragment fragment = fragments.get(i);
        if (flag && fragment != null) {
            return fragment;
        }
        if (fragment == destFragment) {
            flag = true;
        }
    }
    return null;
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
/**
 * 获取目标Fragment的前一个Fragment
 *
 * @param fragment 目标Fragment
 */
SupportFragment getPreFragment(Fragment fragment) {
    FragmentManager fragmentManager = fragment.getFragmentManager();
    fragmentManager = checkFragmentManager(fragmentManager, null);
    if (fragmentManager == null) return null;

    List<Fragment> fragmentList = fragmentManager.getFragments();
    if (fragmentList == null) return null;

    int index = fragmentList.indexOf(fragment);
    for (int i = index - 1; i >= 0; i--) {
        Fragment preFragment = fragmentList.get(i);
        if (preFragment instanceof SupportFragment) {
            return (SupportFragment) preFragment;
        }
    }
    return null;
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
/**
 * 获取目标fragment的前一个fragment
 *
 * @param destFragment 目标fragment
 * @return 目标fragment的前一个fragment
 */
public static Fragment getPreFragment(@NonNull Fragment destFragment) {
    FragmentManager fragmentManager = destFragment.getFragmentManager();
    if (fragmentManager == null) {
        return null;
    }
    List<Fragment> fragments = getFragments(fragmentManager);
    boolean flag = false;
    for (int i = fragments.size() - 1; i >= 0; --i) {
        Fragment fragment = fragments.get(i);
        if (flag && fragment != null) {
            return fragment;
        }
        if (fragment == destFragment) {
            flag = true;
        }
    }
    return null;
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
@Override
public boolean isValid() {
	Fragment fragment = get();

	return fragment != null &&
			fragment.getHost() != null &&
			fragment.getFragmentManager() != null && !fragment.getFragmentManager().isDestroyed() &&
			fragmentSaveInstanceStateIsNotCalled(fragment);
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
public AutoClearedValue(Fragment fragment, T value) {
    FragmentManager fragmentManager = fragment.getFragmentManager();
    fragmentManager.registerFragmentLifecycleCallbacks(
            new FragmentManager.FragmentLifecycleCallbacks() {
                @Override
                public void onFragmentViewDestroyed(FragmentManager fm, Fragment f) {
                    if (f == fragment) {
                        AutoClearedValue.this.value = null;
                        fragmentManager.unregisterFragmentLifecycleCallbacks(this);
                    }
                }
            },false);
    this.value = value;
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
void addCancelOnFragmentDestroyIfSet() {
    if (cancelOnDestroyFragment == null) {
        return;
    }
    Fragment fragment = cancelOnDestroyFragment.get();
    if (fragment == null) {
        return;
    }
    FragmentManager manager = fragment.getFragmentManager();
    if (manager != null) {
        manager.registerFragmentLifecycleCallbacks(
                new CCMonitor.FragmentMonitor(this)
                , false);
    }
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
public AutoClearedValue(Fragment fragment, T value) {
    FragmentManager fragmentManager = fragment.getFragmentManager();
    fragmentManager.registerFragmentLifecycleCallbacks(
            new FragmentManager.FragmentLifecycleCallbacks() {
                @Override
                public void onFragmentViewDestroyed(FragmentManager fm, Fragment f) {
                    AutoClearedValue.this.value = null;
                    fragmentManager.unregisterFragmentLifecycleCallbacks(this);
                }
            },false);
    this.value = value;
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
public static void clearBackStack(Fragment fragment) {
    FragmentManager fm = fragment.getFragmentManager();
    clearBackStack(fm);
}
 

import android.support.v4.app.Fragment; //导入方法依赖的package包/类
/**
 * Shows the dialog. Results will be forwarded to the fragment supplied.
 * The tag can be used to identify the dialog in {@link OnDialogResultListener#onResult}
 *
 * @param fragment the hosting fragment
 * @param tag the dialogs tag
 */
public void show(Fragment fragment, String tag){
    setTargetFragment(fragment, -1);
    try {
        super.show(fragment.getFragmentManager(), tag);
    } catch (IllegalStateException ignored){}
}