Android常用开源项目(二十四)

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Android开发实现自定义式菜单选项（模仿头条的菜单配置）

1.先看效果图

Android开发实现自定义式菜单选项（模仿头条的菜单配置）

首页面

Android开发实现自定义式菜单选项（模仿头条的菜单配置）

添加菜单

Android开发实现自定义式菜单选项（模仿头条的菜单配置）

动画显示效果

2.具体实现方式

(1).代码结构图

Android开发实现自定义式菜单选项（模仿头条的菜单配置）

代码结构图

(2).自定义实现Application

public class MyApp extends Application {

private static MyApp mAppApplication;

private SQLHelper sqlHelper;

@Override

public void onCreate() {

super.onCreate();

mAppApplication = this;

}

/**

* 获取Application

public static MyApp getApp() {

return mAppApplication;

}

/**

* 获取数据库Helper

public SQLHelper getSQLHelper() {

if (sqlHelper == null)

sqlHelper = new SQLHelper(mAppApplication);

return sqlHelper;

}

(3).实现Activity包下面的类

MainActivity.java

public class MainActivity extends AppCompatActivity {

public static boolean isChange = false;

/** 用户选择的新闻分类列表 */

protected static ArrayList<ChannelItem> userChannelLists;

protected LinearLayout mRadioGroup_content;

private ArrayList<Fragment> fragments;

protected ColumnHorizontalScrollView mColumnHorizontalScrollView;

protected ImageView shade_left;

protected ImageView shade_right;

protected LinearLayout ll_more_columns;

protected RelativeLayout rl_column;

protected ViewPager mViewPager;

/** 屏幕宽度 */

private int mScreenWidth = 0;

/** Item宽度 */

private int mItemWidth = 0;

/** 当前选中的栏目 */

private int columnSelectIndex = 0;

private NewsFragmentPagerAdapter mAdapetr;

private Fragment newfragment;

public final static int CHANNELREQUEST = 1;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initView();

initData();

initViewPager();

setChangelView();

}

private void initView(){

mRadioGroup_content=(LinearLayout)findViewById(R.id.mRadioGroup_content);

mColumnHorizontalScrollView=(ColumnHorizontalScrollView)findViewById(R.id.mColumnHorizontalScrollView);

shade_left=(ImageView)findViewById(R.id.shade_left);

shade_right=(ImageView)findViewById(R.id.shade_right);

ll_more_columns=(LinearLayout)findViewById(R.id.ll_more_columns);

rl_column=(RelativeLayout)findViewById(R.id.rl_column);

mViewPager=(ViewPager)findViewById(R.id.mViewPager);

}

private void initData(){

mScreenWidth = BaseTools.getWindowsWidth(this);

mItemWidth = mScreenWidth / 7;// 一个Item宽度为屏幕的1/7

userChannelLists = new ArrayList<ChannelItem>();

fragments = new ArrayList<Fragment>();

}

private void initViewPager() {

mAdapetr = new NewsFragmentPagerAdapter(

getSupportFragmentManager());

mViewPager.setOffscreenPageLimit(1);

mViewPager.setAdapter(mAdapetr);

mViewPager.setOnPageChangeListener(pageListener);

}

protected void onMoreColumns(View view) {

startActivityForResult(new Intent(this,ChannelActivity.class),CHANNELREQUEST);

}

public ViewPager.OnPageChangeListener pageListener = new ViewPager.OnPageChangeListener() {

@Override

public void onPageScrollStateChanged(int arg0) {

}

@Override

public void onPageScrolled(int arg0, float arg1, int arg2) {

}

@Override

public void onPageSelected(int position) {

mViewPager.setCurrentItem(position);

selectTab(position);

}

};

/**

* 选择的Column里面的Tab

private void selectTab(int tab_postion) {

columnSelectIndex = tab_postion;

for (int i = 0; i < mRadioGroup_content.getChildCount(); i++) {

View checkView = mRadioGroup_content.getChildAt(tab_postion);

int k = checkView.getMeasuredWidth();

int l = checkView.getLeft();

int i2 = l + k / 2 - mScreenWidth / 2;

// rg_nav_content.getParent()).smoothScrollTo(i2, 0);

mColumnHorizontalScrollView.smoothScrollTo(i2, 0);

// mColumnHorizontalScrollView.smoothScrollTo((position - 2) *

// mItemWidth , 0);

}

// 判断是否选中

for (int j = 0; j < mRadioGroup_content.getChildCount(); j++) {

View checkView = mRadioGroup_content.getChildAt(j);

boolean ischeck;

if (j == tab_postion) {

ischeck = true;

} else {

ischeck = false;

}

checkView.setSelected(ischeck);

}

/**

* 当栏目项发生变化时候调用

public void setChangelView() {

initColumnData();

}

/** 获取Column栏目数据 */

private void initColumnData() {

userChannelLists = ((ArrayList<ChannelItem>) ChannelManage.getManage(

MyApp.getApp().getSQLHelper()).getUserChannel());

initTabColumn();

initFragment();

}

/**

* 初始化Column栏目项

private void initTabColumn() {

mRadioGroup_content.removeAllViews();

int count = userChannelLists.size();

mColumnHorizontalScrollView.setParam(this, mScreenWidth, mRadioGroup_content, shade_left,

shade_right, ll_more_columns, rl_column);

for (int i = 0; i < count; i++) {

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(mItemWidth,

LinearLayout.LayoutParams.WRAP_CONTENT);

params.leftMargin = 5;

params.rightMargin = 5;

// TextView localTextView = (TextView)

// mInflater.inflate(R.layout.column_radio_item, null);

TextView columnTextView = new TextView(this);

columnTextView.setTextAppearance(this, R.style.top_category_scroll_view_item_text);

// localTextView.setBackground(getResources().getDrawable(R.drawable.top_category_scroll_text_view_bg));

columnTextView.setBackgroundResource(R.drawable.radio_buttong_bg);

columnTextView.setGravity(Gravity.CENTER);

columnTextView.setPadding(5, 5, 5, 5);

columnTextView.setId(i);

columnTextView.setText(userChannelLists.get(i).getName());

columnTextView.setTextColor(getResources().getColorStateList(

R.color.top_category_scroll_text_color_day));

if (columnSelectIndex == i) {

columnTextView.setSelected(true);

}

columnTextView.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

for (int i = 0; i < mRadioGroup_content.getChildCount(); i++) {

View localView = mRadioGroup_content.getChildAt(i);

if (localView != v)

localView.setSelected(false);

else {

localView.setSelected(true);

mViewPager.setCurrentItem(i);

}

});

mRadioGroup_content.addView(columnTextView, i, params);

}

/**

* 初始化Fragment

private void initFragment() {

fragments.clear();

int count = userChannelLists.size();

for (int i = 0; i < count; i++) {

// Bundle data = new Bundle();

String nameString = userChannelLists.get(i).getName();

// data.putString("text", nameString);

// data.putInt("id", userChannelList.get(i).getId());

// initFragment(nameString);

// map.put(nameString, nameString);

// newfragment.setArguments(data);

fragments.add(initFragment(nameString));

// fragments.add(nameString);

}

mAdapetr.appendList(fragments);

}

public Fragment initFragment(String channelName) {

if (channelName.equals("头条")) {