新闻客户端
项目名称:新闻客户端
开发语言：java
开发环境：Eclipse、android SDK
项目简介:一款基于Android系统的新闻浏览软件，实现从网络获取新闻数据，下拉刷新，下拉加载更多，等功能
这里主要是实现上面的ViewPager和下面的ListView列表一起上下滚动的效果，使用的是第三方包ImageSlider_library，这里导入第三包的时候需要注意，必须勾选（copy project into
Workspace）这个选项，就是把你导入的第三包复制到和你当前的项目同一工作空间下面，这样才能找到，然后就是添加第三包了,右键你的项目选择，properties__Android__libary_add_apply_ok就行了，
这个页面效果布局也是一个Listview.只是上面的ViewPager是ListView设置的头HeadView，
private View mHeaderView;
private SliderLayout mSliderLayout;
首先要定义两个变量，他们的包就是你所导入的第三方包；
然后你需要新建一个xml，布局就是ListView的头部布局
这里引用的就是第三包的布局了
<com.scxh.slider.library.SliderLayout
然后就是把布局转换成View对象了
mHeaderView = inflater.inflate(
R.layout.fragment_imageslider_listview_headview, null);
mSliderLayou=(SliderLayout)mHeaderView.findViewById(R.id.my_slider);
然后就是设置到ListView了
HashMap http_url_maps = getData();
for (String name : http_url_maps.keySet()) {
TextSliderView textSliderView= new TextSliderView(getActivity());
textSliderView.description(name).image(http_url_maps.get(name))
.setScaleType(BaseSliderView.ScaleType.Fit);
mSliderLayout.addSlider(textSliderView);
}
mListView.addHeaderView(mHeaderView);
MyBaseAdapter mAdapter = new MyBaseAdapter(getActivity());
mListView.setAdapter(mAdapter);
mAdapter.setData(getDataContent());
当然显示的内容肯定是要有个数据源，HashMap的数据和对象的数组都行，这里是从网络获取的
当我从网络取到数据的时候，从数据数组里面任意取几项放到一个新的数组里面，这个数据就是我这里的数据源
ArrayList imageList = new ArrayList();
int count = 4;
if (count > 0) {
imageList.add(content);
count--;
}
这里表示我只取4项，然后添加到数组里面，作为数据源
setSliderImage(imageList);
public void setSliderImage(ArrayList imageList) {
mSliderLayout.removeAllSliders();
for (ContentBean bean : imageList) {
TextSliderView textSliderView = new TextSliderView(getActivity());
Log.v("tag", "bean.getImgsrc() >>> " + bean.getImgsrc());
textSliderView.description(bean.getTitle()).image(bean.getImgsrc())
.setScaleType(BaseSliderView.ScaleType.Fit);
mSliderLayout.addSlider(textSliderView);
}
}
这样头部的设置就完成了，下面的LsitView就比较简单了，把从网络获取到所有数据取你需要显示的东西，添加到对象里面，再建一个动态数组List<对象>就是适配器的数据源了，再自定义适配器，然后ListView设置适配器就行了
这样这个界面就完成了；
在这里界面显示有个难点，就是ListView的单项布局有两种显示方式
List列表的两种显示方式的实现
这里首先你肯定需要两个XML,然后就是在自定义的适配器中多重写几个方法
private final static int TYPE_ONE = 0; // 类型序号必须从0开始
private final static int TYPE_TWO = 1;
private final static int TYPE_COUNT = 2; // listview类型个数
@Override
public int getViewTypeCount() {
return TYPE_COUNT;
}
@Override
public int getItemViewType(int position) {
ContentBean typeBean = (ContentBean) getItem(position);
ArrayList imageArray = typeBean.getImgextra();
if (imageArray != null) {
return TYPE_ONE;
} else {
return TYPE_TWO;
}
}
这个方法是需要你传的数据过来，判断你去加载哪种布局
public View getTypeOneView(int position, View convertView,
ViewGroup parent) {
加载第一种布局
public View getTypeOneView(int position, View convertView,
ViewGroup parent) {
加载第二种布局
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (getItemViewType(position) == TYPE_ONE) {
return getTypeOneView(position, convertView, parent);
} else {
return getTwoTypeView(position, convertView, parent);
}
}
调用getItemViewType决定调用哪个方法去加载那种布局
这样这个界面就完成了；
二.下拉刷新，下拉加载更多
这里使用的是XListView的下拉刷新，上拉加载更多的效果
首先你还是需要导入第三方包XlistView;
这里需要改变的只是将你主布局XML里面的ListVIiew改成导入的第三包的XListView
使用就是在使用的类里面实现IXListViewListener接口，并实现里面的两个方法
@Override
public void onRefresh() {
//刷新
}
@Override
public void onLoadMore() {
//加载更多
}
}在方法里面写需要实现的功能就行了；
在这里也有一个难点，就是当加载更多的时候List列表显示的数据问题，我们希望实现数据累加的，而不是只是显示一页，的数据，这也需要在自定义适配器里面重写，两个方法
public void setAdapterData(ArrayList list) {
this.list = list;
notifyDataSetChanged();
}
当第一页的时候直接设置
public void addAdapterData(ArrayList list) {
this.list.addAll(list);
notifyDataSetChanged();
}
当不是第一页的时候就累加list数据源 侧滑切换功能的实现
首先你还是需要导入第三方包slidingmenu_library
然后新建一个你侧滑时候出现的Fragment
package com.example.pressclient;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.SimpleAdapter;
public class SlidingmenuFragment extends Fragment {
private ListView mListView;
public static SlidingmenuFragment newInstance() {
return new SlidingmenuFragment();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.slidingmenu_menu_layout,
container, false);
mListView = (ListView) view.findViewById(R.id.slidingmenu_list);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
GetData();
String[] from = { "icon", "text" };
int[] to = { R.id.sm_list_item_icon, R.id.sm_list_item_text };
SimpleAdapter adapter = new SimpleAdapter(getActivity(), GetData(),
R.layout.slidingmenu_list_item, from, to);
mListView.setAdapter(adapter);
}
private List> GetData() {
List> list = new ArrayList>();
HashMap item = new HashMap();
item.put("icon", R.drawable.sliding_navigation_tab_pics);
item.put("text", "图片");
list.add(item);
item = new HashMap();
item.put("icon", R.drawable.sliding_navigation_tab_video);
item.put("text", "视频");
list.add(item);
item = new HashMap();
item.put("icon", R.drawable.sliding_navigation_tab_weather);
item.put("text", "天气");
list.add(item);
item = new HashMap();
item.put("icon", R.drawable.sliding_navigation_tab_map_1);
item.put("text", "地图");
list.add(item);
item = new HashMap();
item.put("icon", R.drawable.sliding_navigation_tab_more);
item.put("text", "更多");
list.add(item);
return list;
}
}
然后就是在主Activity里面引用这个Fragment了
private void setBehindContentView() {
setBehindContentView(R.layout.slidingmenu_item_layout);
getSupportFragmentManager()
.beginTransaction()
.add(R.id.slidingmenu_item_layout,
SlidingmenuFragment.newInstance()).commit();
SlidingMenu sm = getSlidingMenu();
sm.setSlidingEnabled(true);
sm.setTouchModeAbove(SlidingMenu.TOUCHMODE_MARGIN);
sm.setShadowWidthRes(R.dimen.shadow_width);
sm.setBehindOffsetRes(R.dimen.slidingmenu_offset);
sm.setBehindScrollScale(0);
sm.setFadeDegree(0.25f);
}
这样侧滑就实现了
新闻列表点击内容的实现
@Override
public void onItemClick(AdapterView parent, View view, int position,
long id) {
Intent intent = new Intent(getActivity(), ContentActivity.class);
ContentBean content = (ContentBean) parent.getAdapter().getItem(
position);
String docid = content.getDocid();
intent.putExtra("docid", docid);
startActivity(intent);
package com.example.pressclient;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.example.pressclient.ConnectionUtils.CallConnectionInterface;
import com.example.pressclient.ConnectionUtils.Method;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.webkit.WebView;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;
public class ContentActivity extends Activity implements OnClickListener{
private WebView mWebView;
private TextView mTitle, mSource, mTime, mPicNumber;
private ImageView mImageView;
private String docid = "A90HHI6I00014SEH";// 新闻ID ,从新闻列表项目获取
private String url;
private ProgressBar mProgressBar;
private ConnectionUtils connectionUtils;
private AsyncLoaderImage asyncLoaderImage;
private ImageView mBackBtn;
private static final int HANDLER_ERROR = 1;
private Handler mHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case HANDLER_ERROR:
String errorResponse = (String) msg.obj;
Toast.makeText(ContentActivity.this, errorResponse, Toast.LENGTH_SHORT)
.show();
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
getWindow().requestFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.list_item_content);
mWebView = (WebView) findViewById(R.id.ContentWebView);
mTitle = (TextView) findViewById(R.id.content_title);
mSource = (TextView) findViewById(R.id.content_source_text);
mTime = (TextView) findViewById(R.id.content_time);
mImageView = (ImageView) findViewById(R.id.content_image);
mPicNumber = (TextView) findViewById(R.id.pic_number);
mProgressBar=(ProgressBar) findViewById(R.id.content_progress);
mBackBtn=(ImageView) findViewById(R.id.back_btn);
mBackBtn.setOnClickListener(this);
mImageView.setVisibility(View.GONE);
connectionUtils = new ConnectionUtils();
asyncLoaderImage = AsyncLoaderImage.getInstanceAsyncLoaderImage();
GetData();
}
private void GetData() {
Intent intent = getIntent();
docid = intent.getStringExtra("docid");
url = "http://c.m.163.com/nc/article/" + docid + "/" + "full.html";
connectionUtils.asyncTaskConnection(url, Method.GET,
new CallConnectionInterface() {
@Override
public void onExecuteResponse(String response) {
try {
mProgressBar.setVisibility(View.VISIBLE);
JSONObject jsonObject = new JSONObject(response);
JSONObject bodyObj = jsonObject
.getJSONObject(docid);
String body = bodyObj.getString("body");
final String title = bodyObj.getString("title");
String source = bodyObj.getString("source");
String ptime = bodyObj.getString("ptime");
mTitle.setText(title);
mSource.setText("来源:" + source);
mTime.setText(ptime);
mWebView.loadDataWithBaseURL(null, body,
"text/html", "utf-8", null);
if (bodyObj.has("img")) {
final ArrayList imageUrls = new ArrayList();
JSONArray imageArray = bodyObj
.getJSONArray("img");
for (int i = 0; i < imageArray.length(); i++) {
JSONObject obj = imageArray
.getJSONObject(i);
String imagrUrl = obj.getString("src");
imageUrls.add(imagrUrl);
}
Log.e("TAG", "imageUrls======"+imageUrls);
if (imageUrls != null&& imageArray.length() > 0) {
Log.e("TAG", "imageUrls======"+imageUrls);
mImageView.setVisibility(View.VISIBLE);
int count = imageArray.length();
mPicNumber.setText("共" + count + "张");
String url = imageUrls.get(0);
asyncLoaderImage.loadBitmap(getResources(),
url, mImageView);
mImageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(ContentActivity.this,
HttpImagevViewPager.class);
intent.putExtra("imageUrls",imageUrls);
intent.putExtra("title", title);
startActivity(intent);
}
});
}
} else {
mImageView.setVisibility(View.GONE);
}
} catch (JSONException e) {
e.printStackTrace();
}
mProgressBar.setVisibility(View.GONE);
}
@Override
public void onErrorResponse(String errorResponse) {
Message msg = Message.obtain();
msg.what = HANDLER_ERROR;
msg.obj = errorResponse;
mHandler.sendMessage(msg);
}
});
}
public Bitmap getBitmapByHttp(String httpUrl) {
InputStream ins = null;
try {
URL url = new URL(httpUrl);
ins = url.openStream();
Bitmap bitmap = BitmapFactory.decodeStream(ins);
return bitmap;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (ins != null) {
try {
ins.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return null;
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.back_btn:
// Intent intent=new Intent(this, MainActivity.class);
// startActivity(intent);
this.finish();
System.exit(0);
break;
default:
break;
}
}
}
主页Tab切换和滑动效果的嵌套实现
mRadioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId) {
case R.id.HeadlineTab:
mViewPager.setCurrentItem(0);
break;
case R.id.RecreationTab:
mViewPager.setCurrentItem(1);
break;
case R.id.SportsTab:
mViewPager.setCurrentItem(2);
break;
case R.id.FinanceTab:
mViewPager.setCurrentItem(3);
break;
case R.id.ScienceTab:
mViewPager.setCurrentItem(4);
break;
}
}
});
mViewPager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int arg0) {
switch (arg0) {
case 0:
mHeadlineTab.setChecked(true);
break;
case 1:
mRecreationTab.setChecked(true);
break;
case 2:
mSportsTab.setChecked(true);
break;
case 3:
mFinanceTab.setChecked(true);
break;
case 4:
mScienceTab.setChecked(true);
break;
}
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}