2013.12.04 （5）——— android SlidingMenu之FragmentChangeActivity-优快云博客

本文链接：https://blog.youkuaiyun.com/cody123/article/details/84509994

本文介绍了一个使用Android SlidingMenu实现片段切换的示例。通过在侧边栏的Fragment中定义switchFragment方法，可以轻松地在主界面的片段之间进行切换。

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2013.12.04 （5）——— android SlidingMenu之FragmentChangeActivity

package com.jeremyfeinstein.slidingmenu.example.fragments;

import android.os.Bundle;
import android.support.v4.app.Fragment;

import com.jeremyfeinstein.slidingmenu.example.BaseActivity;
import com.jeremyfeinstein.slidingmenu.example.R;
import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;

public class FragmentChangeActivity extends BaseActivity {

	private Fragment mContent;

	public FragmentChangeActivity() {
		super(R.string.changing_fragments);
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		// set the Above View
		if (savedInstanceState != null)
			mContent = getSupportFragmentManager().getFragment(savedInstanceState, "mContent");
		if (mContent == null)
			mContent = new ColorFragment(R.color.red);	

		// set the Above View
		setContentView(R.layout.content_frame);
		getSupportFragmentManager()
		.beginTransaction()
		.replace(R.id.content_frame, mContent)
		.commit();

		// set the Behind View
		setBehindContentView(R.layout.menu_frame);
		getSupportFragmentManager()
		.beginTransaction()
		.replace(R.id.menu_frame, new ColorMenuFragment())
		.commit();

		// customize the SlidingMenu
		getSlidingMenu().setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		getSupportFragmentManager().putFragment(outState, "mContent", mContent);
	}

	public void switchContent(Fragment fragment) {
		mContent = fragment;
		getSupportFragmentManager()
		.beginTransaction()
		.replace(R.id.content_frame, fragment)
		.commit();
		getSlidingMenu().showContent();
	}

}

package com.jeremyfeinstein.slidingmenu.example.fragments;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.jeremyfeinstein.slidingmenu.example.R;

public class ColorMenuFragment extends ListFragment {

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		return inflater.inflate(R.layout.list, null);
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);
		String[] colors = getResources().getStringArray(R.array.color_names);
		ArrayAdapter<String> colorAdapter = new ArrayAdapter<String>(getActivity(), 
				android.R.layout.simple_list_item_1, android.R.id.text1, colors);
		setListAdapter(colorAdapter);
	}

	@Override
	public void onListItemClick(ListView lv, View v, int position, long id) {
		Fragment newContent = null;
		switch (position) {
		case 0:
			newContent = new ColorFragment(R.color.red);
			break;
		case 1:
			newContent = new ColorFragment(R.color.green);
			break;
		case 2:
			newContent = new ColorFragment(R.color.blue);
			break;
		case 3:
			newContent = new ColorFragment(android.R.color.white);
			break;
		case 4:
			newContent = new ColorFragment(android.R.color.black);
			break;
		}
		if (newContent != null)
			switchFragment(newContent);
	}

	// the meat of switching the above fragment
	private void switchFragment(Fragment fragment) {
		if (getActivity() == null)
			return;

		if (getActivity() instanceof FragmentChangeActivity) {
			FragmentChangeActivity fca = (FragmentChangeActivity) getActivity();
			fca.switchContent(fragment);
		} else if (getActivity() instanceof ResponsiveUIActivity) {
			ResponsiveUIActivity ra = (ResponsiveUIActivity) getActivity();
			ra.switchContent(fragment);
		}
	}


}

这个例子主要介绍了，如何实现主界面fragmen的切换

1、在侧边栏的Fragment里面

private void switchFragment(Fragment fragment) {
		if (getActivity() == null)
			return;

		if (getActivity() instanceof FragmentChangeActivity) {
			FragmentChangeActivity fca = (FragmentChangeActivity) getActivity();
			fca.switchContent(fragment);
		} else if (getActivity() instanceof ResponsiveUIActivity) {
			ResponsiveUIActivity ra = (ResponsiveUIActivity) getActivity();
			ra.switchContent(fragment);
		}
	}

调用上层activity的switchContent方法

public void switchContent(Fragment fragment) {
		mContent = fragment;
		getSupportFragmentManager()
		.beginTransaction()
		.replace(R.id.content_frame, fragment)
		.commit();
		getSlidingMenu().showContent();
	}