' Android 知识库
效果
布局
SplashActivity
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
handler.postDelayed(new Runnable() {
@Override
public void run() {
Intent intent = new Intent(SplashActivity.this, MainActivity.class);
startActivity(intent);
finish();//关闭当前页面
}
}, 2000);
}效果
/**
* Created by chen on 2017/8/12.
*
* 基类:baseFragment
*
* 四个页面都需要继承当前basefragment类
*
*/
public abstract class BaseFragment extends Fragment {
public Context mContext;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = this.getActivity();
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return initView();
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
initData();
}
/**
* 初始化数据
*/
protected abstract void initData();
/**
* 初始化视图: 强制子类实现
* @return
*/
protected abstract View initView();
}
Multi-line CodeCommonFrameFragment ThirdFragment CustomFragment OtherFragment
- 初始化视图: initView()
- 初始化Fragments
- radiogroup设置change监听
- 切换fragment
private List<BaseFragment> fragmentList;
//当前显示的fragment的下标
private int position = 0;
private Fragment mContent;//当前显示的fragment
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
//1. 初始化视图
initView();
//2. initFragment
initFragment();//初始化帧布局
//3. 设置radiogroup监听
setListener();
}
/**
* radiogroup 设置监听
*/
private void setListener() {
rgMain.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, @IdRes int i) {
switch (i) {
case R.id.rb_home:
position = 0;
break;
case R.id.rb_third:
position = 1;
break;
case R.id.rb_custom:
position = 2;
break;
case R.id.rb_other:
position = 3;
break;
default:
position = 0;
break;
}
BaseFragment to = fragmentList.get(position);
switchFragment(mContent, to);//
}
});
}
/**
* @param from :正在显示的fragment
* @param to :将要显示的fragment
*/
private void switchFragment(Fragment from, Fragment to) {
if (from != to) {//需要切换
mContent = to;
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
//1. 判读to是否已经添加
if (to.isAdded()) {//to已经添加--使用show /hide
if (from != null) {
ft.hide(from);
}
ft.show(to);
ft.commit();
} else {//to没有添加--添加to
if (from != null) {
ft.hide(from);
}
ft.add(R.id.fl_content, to);
ft.commit();
}
}
}
private void initFragment() {
fragmentList = new ArrayList<>();
fragmentList.add(new CommonFrameFragment());
fragmentList.add(new ThirdPartFragment());
fragmentList.add(new CustomFragment());
fragmentList.add(new OtherFragment());
switchFragment(mContent,fragmentList.get(0));//默认显示第一个fragment
rbHome.setChecked(true);//设置第一按钮的选中状态
}
private void initView() {
//switchFragment(0);
}
Multi-line Codepublic class CommonFrameFragmentAdapter extends BaseAdapter {
private final Context mContex;
private final String[] datas;
public CommonFrameFragmentAdapter(Context mContex, String[] datas) {
this.mContex = mContex;
this.datas = datas;
}
@Override
public int getCount() {
return datas.length;
}
@Override
public Object getItem(int i) {
return i;
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
TextView tv = new TextView(mContex);
tv.setText(datas[i]);
tv.setTextSize(20);
tv.setTextColor(Color.BLACK);
tv.setPadding(10,5,10,5);
return tv;
}
}public class CommonFrameFragment extends BaseFragment {
@BindView(R.id.lv_main_common)
ListView lvMainCommon;
Unbinder unbinder;
private String[] datas;
@Override
protected void initData() {
datas = new String[]{"OKHttp", "xUtils3", "Retrofit2", "Fresco", "Glide", "greenDao", "RxJava", "volley", "Gson", "FastJson", "picasso", "evenBus", "jcvideoplayer", "pulltorefresh", "Expandablelistview", "UniversalVideoView", "....."};
lvMainCommon.setAdapter(new CommonFrameFragmentAdapter(mContext,datas));
lvMainCommon.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
// String content = ((TextView)view).getText().toString();
String text = datas[i];
Toast.makeText(mContext, text, Toast.LENGTH_SHORT).show();
}
});
}
@Override
protected View initView() {
return null;
}
@Override
public void onDestroyView() {
super.onDestroyView();
unbinder.unbind();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// TODO: inflate a fragment view
View view = View.inflate(mContext, R.layout.fragment_main_commonframe, null);
unbinder = ButterKnife.bind(this, view);
return view;
}
}