在fragment中用ViewFlipper做网络图片轮播手动+自动+点击事件

本人刚步入大三,从大二开始自学Android,已经学了一年了,所以我还是个小菜,希望老鸟们勿喷。本博客分享个人开发经验,用于互相交流学习。

由于项目中需要用到图片轮播所以花了一天的时间把它弄了出来,我也是第一次来做,数据缓存还没有做,如有更好的方法请与我分享。([email protected]
先需求分析一下

在fragment中用ViewFlipper做网络图片轮播手动+自动+点击事件_第1张图片
UI主线程中初始化ViewFlipper
我是在fragment来做的底部导航,所以我的ViewFlipper在fragment中。

public class FragmentHome extends Fragment {
    private ViewFlipper flipper;
    private GridView gridView;
    private List> dataList;
    private SimpleAdapter sim_adapter;
    private String url="http://******/microclass/index.php?g=service&m=index&a=index";
    private Handler handler = new Handler();
    @Override
    @Nullable
    public View onCreateView(LayoutInflater inflater,
            @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        View view = inflater.inflate(R.layout.fragment_home,container,false);
        flipper = (ViewFlipper) view.findViewById(R.id.viewFlipper);
        new ThreadGetHomeImages(url, handler, flipper, getActivity()).start();
        return view;
    }

将接口的URL传递给网络线程获取所有的JSON数据(由于一些安全性问题,不方便将JSON数据完全分享出来)

{"flag":"Success","msg":"\u9996\u9875\u6eda\u52a8\u56fe\u7247","data":[{"slide_name":"\u4e60\u5927\u5927\u7684\u8868\u60c5\u8bf4\u660e\u4e86\u4e00\u5207\uff01","slide_pic":"http:\/\/**********\/microclass\/data\/upload\/20160916\/57dbdacb2e1ff.jpg","slide_url":"http:\/\/**********\/microclass\/index.php?g=&m=article&a=index&id=27"},{"slide_name":"\u5fae\u8bfb\u4e66\uff01","slide_pic":"http:\/\/******\/microclass\/data\/upload\/20160916\/57dbb7cdbc81b.jpg","slide_url":"http:\/\/*******\/microclass\/index.php?g=portal&m=article&a=index&id=26"},{"slide_name":"\u61a7\u61ac\u7684\u7ae5\u5e74","slide_pic":"http:\/\/**********\/microclass\/data\/upload\/20160916\/57dbd6de2036c.jpg","slide_url":"http:\/\/********\/microclass\/index.php?g=portal&m=article&a=index&id=28"}]}
public class ThreadGetHomeImages extends Thread {
    private String url,str,imageUrl;
    private ViewFlipper flipper;
    private List imageViews = new ArrayList();
    private List data;//方便数据的写入和读取
    private ImageView temp;
    private Handler handler;
    private Context context;
    private TranslateAnimation rightInAnim,leftOutAnim,rightOutAnim,leftInAnim;
    private float startX;
    private HttpClient client;
    public ThreadGetHomeImages(String url,Handler handler,ViewFlipper flipper,Context context) {
        // TODO Auto-generated constructor stub
        this.url = url;
        this.handler = handler;
        this.flipper = flipper;
        this.context = context;
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        try {
            client = new DefaultHttpClient();
            HttpGet request = new HttpGet(); //用GET方法
            request.setURI(new URI(url));//设置URL
            HttpResponse response = client.execute(request);//发送请求返回响应
            HttpEntity entity = response.getEntity();//获得网页内容实体
            if(entity != null){
                str = EntityUtils.toString(entity);//如果不为空就转换成字符串类型
                Log.i("Json", str);
                data = parseJson(str);//对获取到的JSON字符串进行解析赋值给List data
                for(int i = 0; i//通过循环将图片的URL数据读取出来
                    imageUrl = data.get(i).getImageUrl();
                    Log.i("ImageUrl", imageUrl+"");
                    temp = new ImageView(context);
                    temp.setImageBitmap(getBitmap(imageUrl));//getbitmap方法获取网络图片
                    temp.setScaleType(ScaleType.CENTER_CROP);//控制图片的显示
                    imageViews.add(temp);//添加到ImageView集合中
                }
            }

        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (URISyntaxException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


        handler.post(new Runnable() {

            @Override
            public void run() {
                // TODO Auto-generated method stub
                setVeiwFlipperAnim();//在主线程中更新UI
            }
        });
        super.run();
    }
    private List parseJson(String json) {
        List items = new ArrayList();//new一个CarouselImage集合
        try {
            JSONObject object = new JSONObject(json);
            String state = object.getString("flag");
            if(state.equals("Success")){
                JSONArray ImagesData = object.getJSONArray("data");
                for(int i = 0;inew CarouselImage();  
                    JSONObject item = ImagesData.getJSONObject(i);
                    image.setImageName(item.getString("slide_name"));
                    image.setImageUrl(item.getString("slide_pic"));
                    image.setTextUrl(item.getString("slide_url"));
                    Log.i("ImageUrl", item.getString("slide_pic"));
                    items.add(image);
                }
                return items;
            }else{
                Log.i("STATE", "数据获取失败!!");
            }

        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }
    public static Bitmap getBitmap(String imageUri) {
        Log.v("ImageUrl", "getbitmap:" + imageUri);
        // 显示网络上的图片
        Bitmap bitmap = null;
        try {
            URL myFileUrl = new URL(imageUri);
            HttpURLConnection conn = (HttpURLConnection) myFileUrl
                    .openConnection();
            conn.setDoInput(true);
            conn.connect();
            InputStream is = conn.getInputStream();
            bitmap = BitmapFactory.decodeStream(is);
            is.close();

            Log.v("download finished", "image download finished." + imageUri);
        } catch (OutOfMemoryError e) {
            e.printStackTrace();
            bitmap = null;
        } catch (IOException e) {
            e.printStackTrace();
            Log.v("getbitmap", "getbitmap bmp fail---");
            bitmap = null;
        }
        return bitmap;
    }
    private void setVeiwFlipperAnim() {
        for(int i =0;iget(i));//将之前做好的ImageView集合中的元素逐一添加添加到ViewFlipper中
        }
        //设置ViewFlipper的滑动行为的动画
        // 图片从右侧滑入
        rightInAnim = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 1.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f);
        rightInAnim.setDuration(1000);
        // 图片从左侧滑出
        leftOutAnim = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, -1.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f);
        leftOutAnim.setDuration(1000);
        // 图片从右侧滑出
        rightOutAnim = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 1.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f);
        rightOutAnim.setDuration(1000);

        // 图片从左侧滑入
        leftInAnim = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -1.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f,
                Animation.RELATIVE_TO_PARENT, 0.0f);
        leftInAnim.setDuration(1000);

        // 正常情况左侧划出,右侧滑入
        flipper.setOutAnimation(leftOutAnim);
        flipper.setInAnimation(rightInAnim);

        flipper.setFlipInterval(5000);//设置自动切换时间
        flipper.startFlipping();

        flipper.setOnTouchListener(new OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                 int action = event.getAction();
                    switch (action) {
                        case MotionEvent.ACTION_DOWN:
                            startX = (int) event.getX();
                            //flipper.stopFlipping();// 当手指按下时,停止图片的循环播放。并记录当前x坐标
                            Log.i("count", flipper.getDisplayedChild()+"");
                            break;
                        case MotionEvent.ACTION_MOVE:
                            break;
                        case MotionEvent.ACTION_UP:
                            if (event.getX() - startX > 100) { // 手指向右滑动,左侧滑入,右侧滑出
                                flipper.setInAnimation(leftInAnim);
                                flipper.setOutAnimation(rightOutAnim);
                                flipper.showPrevious();
                                flipper.startFlipping();
                            } else if (startX - event.getX() > 100) {// 手指向左滑动,右侧滑入,左侧滑出
                                flipper.setInAnimation(rightInAnim);
                                flipper.setOutAnimation(leftOutAnim);
                                flipper.showNext();
                                flipper.startFlipping();
                            }else if(startX - event.getX()<10||event.getX()-startX<10){//当左右滑动的坐标差<10时,可以确定为点击动作,解决了OnTouch和OnClick的冲突
                                //Toast.makeText(context, "当前索引"+flipper.getDisplayedChild(), Toast.LENGTH_SHORT).show();
                                data.get(flipper.getDisplayedChild());
                                Intent intent = new Intent();
                                intent.putExtra("titleName",data.get(flipper.getDisplayedChild()).getImageName());//传递文章标题
                                intent.putExtra("textUrl", data.get(flipper.getDisplayedChild()).getTextUrl());//传递文章的URL
                                intent.setClass(context, WebActivity.class);
                                context.startActivity(intent);
                            }
                            break;

                    }
                //返回false只执行一次监听,返回true会一直进行监听
                return true;
            }
        }); 
    }
}

CarouselImage类

public class CarouselImage {
    private String imageName;   
    private String imageUrl;
    private String textUrl;

    public String getImageName() {
        return imageName;
    }
    public void setImageName(String imageName) {
        this.imageName = imageName;
    }
    public String getImageUrl() {
        return imageUrl;
    }
    public void setImageUrl(String imageUrl) {
        this.imageUrl = imageUrl;
    }
    public String getTextUrl() {
        return textUrl;
    }
    public void setTextUrl(String textUrl) {
        this.textUrl = textUrl;
    }
}

fragment加载的xml文件


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginBottom="50dp"
    android:orientation="vertical"
    android:weightSum="3" >
    <ViewFlipper 
        android:id="@+id/viewFlipper"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">

    ViewFlipper>
    <GridView 
        android:id="@+id/gridView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="2"
        android:layout_marginTop="20dp"
        android:gravity="center_horizontal"
        android:numColumns="3"
        android:stretchMode="columnWidth">GridView>
LinearLayout>

贴下图

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