綜合Demo

這裏主要是：Banner+網絡判斷+網絡請求+XListView多條目+跑馬燈+fragment+AlertDialog

上代碼：首先佈局

activity_main:

 <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >

   <Button
       android:layout_weight="1"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:id="@+id/btn1"
       android:text="熱門"
       android:background="@drawable/btn_selector"
       />
    <Button
        android:layout_weight="1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn2"
        android:text="分類"
        android:background="@drawable/btn_selector"
        />
    <Button
        android:layout_weight="1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn3"
        android:text="作者"
        android:background="@drawable/btn_selector"
        />
    </LinearLayout>

    <RelativeLayout
        android:id="@+id/rela"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></RelativeLayout>

fragment01:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">


    <com.youth.banner.Banner
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:id="@+id/bannerer"
        ></com.youth.banner.Banner>



    <zhangxuelei1506d.mounth_demo.xListView.XListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/xxxxxlist"
        ></zhangxuelei1506d.mounth_demo.xListView.XListView>

</LinearLayout>

fragment02:

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textSize="50dp"
        android:text="分類"
        />

fragment03:

<TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textSize="50dp"
        android:text="作者"
        />

item:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/image_image"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/title_title"
        />

    <zhangxuelei1506d.mounth_demo.xListView.MarqueeTextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        android:singleLine="true"
        android:text="我是跑馬燈效果！！！，我是跑馬燈效果！！！我是跑馬燈效果！！！我是跑馬燈效果！！！我是跑馬燈效果！！！我是跑馬燈效果！！！我是跑馬燈效果！！！我是跑馬燈效果！！！我是跑馬燈效果！！！我是跑馬燈效果！！！我是跑馬燈效果！！！我是跑馬燈效果！！！"/>

</LinearLayout>

開始編寫類裏面的代碼：

MainActivity:

public class MainActivity extends FragmentActivity implements View.OnClickListener {

    private Fragment01 fragment01;
    private Fragment02 fragment02;
    private Fragment03 fragment03;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        boolean iscintent = Utils.iscintent(MainActivity.this);
        if(iscintent==true){

             Toast.makeText(this,"當前網絡已連接",Toast.LENGTH_SHORT).show();
        }else{
            Toast.makeText(this,"當前網絡已斷開",Toast.LENGTH_SHORT).show();
            AlertDialog.Builder alterdialog=new AlertDialog.Builder(this);
            alterdialog.setTitle("警告");
            alterdialog.setMessage(" 通過移動數據訪問？");
            alterdialog.setPositiveButton("確定", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    startActivity(new Intent(ACTION_WIRELESS_SETTINGS));

                }
            });
            alterdialog.setNegativeButton("取消",null);
            alterdialog.create();
            alterdialog.show();

        }


        Button button1 = (Button) findViewById(R.id.btn1);
        button1.setOnClickListener(this);
        Button button2 = (Button) findViewById(R.id.btn2);
        button2.setOnClickListener(this);
        Button button3 = (Button) findViewById(R.id.btn3);
        button3.setOnClickListener(this);

        fragment01 = new Fragment01();
        fragment02 = new Fragment02();
        fragment03 = new Fragment03();

        getSupportFragmentManager().beginTransaction().add(R.id.rela, fragment01).commit();
        getSupportFragmentManager().beginTransaction().add(R.id.rela, fragment02).commit();
        getSupportFragmentManager().beginTransaction().add(R.id.rela, fragment03).commit();
        getSupportFragmentManager().beginTransaction().show(fragment01).hide(fragment02).hide(fragment03).commit();

    }

    @Override
    public void onClick(View v) {

        switch (v.getId()) {

            case R.id.btn1:
                getSupportFragmentManager().beginTransaction().show(fragment01).hide(fragment02).hide(fragment03).commit();
                break;
            case R.id.btn2:
                getSupportFragmentManager().beginTransaction().show(fragment02).hide(fragment01).hide(fragment03).commit();
                break;
            case R.id.btn3:
                getSupportFragmentManager().beginTransaction().show(fragment03).hide(fragment01).hide(fragment02).commit();
                break;

        }


    }
}

fragment01:

public class Fragment01 extends Fragment implements XListView.IXListViewListener {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment01, container, false);


        List<String> images = new ArrayList();

        images.add("http://img3.imgtn.bdimg.com/it/u=3242709860,2221903223&fm=214&gp=0.jpg");
        images.add("http://pic.58pic.com/58pic/14/25/01/74w58PICP5D_1024.jpg");
        images.add("http://img1.imgtn.bdimg.com/it/u=3803696467,3357537026&fm=214&gp=0.jpg");
        images.add("http://img5.niutuku.com/phone/1301/3131/3131-niutuku.com-109273.jpg");
        Banner banner = (Banner) view.findViewById(R.id.bannerer);
        banner.setImageLoader(new GlideImageLoader());
        banner.setImages(images);
        banner.start();


        final XListView xListView = (XListView) view.findViewById(R.id.xxxxxlist);
        xListView.setXListViewListener(this);

        new AsyncTask<Void, Void, String>() {
            @Override
            protected String doInBackground(Void... params) {
                try {
                    URL url = new URL("http://huixinguiyu.cn/Assets/js/newsnew.js");
                    HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
                    httpURLConnection.setRequestMethod("GET");
                    httpURLConnection.setConnectTimeout(8000);
                    httpURLConnection.setReadTimeout(8000);
                    int code = httpURLConnection.getResponseCode();
                    if (code == 200) {
                        InputStream inputStream = httpURLConnection.getInputStream();
                        ByteArrayOutputStream outputstream = new ByteArrayOutputStream();
                        int len = 0;
                        byte[] buffer = new byte[1024];
                        while ((len = inputStream.read(buffer)) != -1) {
                            outputstream.write(buffer, 0, len);

                        }
                        return outputstream.toString();
                    }
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }


                return null;
            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                List<myBean.NewslistBean.NewsBean> list=new ArrayList<myBean.NewslistBean.NewsBean>();
                Gson gson=new Gson();
                myBean myBean = gson.fromJson(s, myBean.class);
                list=myBean.newslist.news;

                myBaseAdapter adapter=new myBaseAdapter(list,getActivity());
                xListView.setAdapter(adapter);


            }
        }.execute();


        return view;
    }

    @Override
    public void onRefresh() {

    }

    @Override
    public void onLoadMore() {

    }
}

fragment02:

public class Fragment02 extends Fragment{
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment02, container, false);
        return view;
    }
}

fragment03:

public class Fragment03 extends Fragment{
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment03, container, false);
        return view;
    }
}

適配器：

public class myBaseAdapter extends BaseAdapter {
    private List<myBean.NewslistBean.NewsBean> list;
    private Context context;

    public myBaseAdapter(List<myBean.NewslistBean.NewsBean> list, Context context) {
        this.list = list;
        this.context = context;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        viewHolder holder = null;
        if (convertView == null) {
            holder = new viewHolder();
            convertView = convertView.inflate(context, R.layout.item, null);

            holder.image = (ImageView) convertView.findViewById(R.id.image_image);
            holder.title = (TextView) convertView.findViewById(R.id.title_title);

            convertView.setTag(holder);

        }else{
            holder= (viewHolder) convertView.getTag();

        }

        holder.title.setText(list.get(position).title);

        //這步驟是用imageloder加載圖片的
                DisplayImageOptions displayImageOptions = new DisplayImageOptions.Builder()
                        .cacheInMemory(true)
                        .cacheOnDisk(true)  .build();
                ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context)
                        .defaultDisplayImageOptions(displayImageOptions)
                        .build();
                ImageLoader.getInstance().init(config);
                ImageLoader.getInstance().displayImage(list.get(position).image, holder.image);



        return convertView;
    }

    class viewHolder {

        ImageView image;
        TextView title;


    }
}

下面這些都是上面需要用到的一些工具類及javaBean：

Banner及Fresco的工具類：

public class GlideImageLoader extends ImageLoader{
    @Override
    public void displayImage(Context context, Object path, ImageView imageView) {
        Uri uri = Uri.parse((String) path);
        imageView.setImageURI(uri);
    }

    @Override
    public ImageView createImageView(Context context) {
        //使用fresco，需要創建它提供的ImageView，當然你也可以用自己自定義的具有圖片加載功能的ImageView
        SimpleDraweeView simpleDraweeView=new SimpleDraweeView(context);
        return simpleDraweeView;
    }



}

Fresco初始化：

public class MyApplication extends Application{

    @Override
    public void onCreate() {
        super.onCreate();
        Fresco.initialize(this);
    }


}

javaBean類：

public class myBean {
    public NewslistBean newslist;
    public static myBean objectFromData(String str) {
        return new Gson().fromJson(str, myBean.class);
    }
    public static class NewslistBean {
        public List<NewsBean> news;
        public static NewslistBean objectFromData(String str) {

            return new Gson().fromJson(str, NewslistBean.class);
        }
        public static class NewsBean {
            public String title;
            public String detail;
            public String comment;
            public String image;
            public static NewsBean objectFromData(String str) {
                return new Gson().fromJson(str, NewsBean.class);
            }
        }
    }
}

判斷手機網絡類：

public class Utils {

    public static boolean iscintent(Context context) {
        ConnectivityManager mConnectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = mConnectivityManager.getActiveNetworkInfo();
        if (info != null) {
            return true;
        }
        return false;
    }
}

這裏還導入XListView的依賴（這個可以從我前面的博客找），

導入Gson jar包，

在清單文件裏註冊

android:name=".MyApplication"

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公衆號5月C#/.NET熱文一覽

git 下載大陸鏡像地址

自定義控件（三種）

綜合Demo

Android觸摸事件進行畫圖簡單實現

Android中的一些小知識點

ViewPager簡單實現

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