MVP请求网络数据上拉刷新下拉加载加断点续传
来源：互联网 发布：java在cmd中输入中文 编辑：程序博客网 时间：2024/05/20 07:17
添加的依赖
compile 'com.squareup.retrofit2:retrofit:2.0.1' compile 'com.squareup.retrofit2:converter-gson:2.0.1' compile 'com.squareup.retrofit2:adapter-rxjava:2.0.1' compile 'io.reactivex:rxandroid:1.1.0' compile 'com.squareup.okhttp3:logging-interceptor:3.4.1' compile 'com.facebook.fresco:fresco:0.12.0' compile 'com.facebook.fresco:animated-base-support:0.12.0' compile 'com.jcodecraeer:xrecyclerview:1.3.2' compile 'com.loopj.android:android-async-http:1.4.9'添加的权限
<uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />activity_main中
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.bwie.test.MainActivity"> <com.jcodecraeer.xrecyclerview.XRecyclerView android:id="@+id/xre_xrv" android:layout_width="match_parent" android:layout_above="@+id/line1" android:layout_height="match_parent"> </com.jcodecraeer.xrecyclerview.XRecyclerView> <LinearLayout android:id="@+id/line1" android:visibility="gone" android:layout_alignParentBottom="true" android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="wrap_content"> <ProgressBar android:id="@+id/pb" style="@android:style/Widget.ProgressBar.Horizontal" android:layout_width="450dp" android:layout_height="20dp" /> <TextView android:id="@+id/tv_info" android:text="下载进度" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout></RelativeLayout>IUserView 中
public interface IUserView { void getUser(ArrayList<HomeBean.DataBean> list);}IUserMode 中
public interface IUserMode { void getJson(String url);}UserMode 中
public class UserMode implements IUserMode{ ArrayList<HomeBean.DataBean> list; String path; public UserMode(String path) { this.path = path; Log.d("1111111111111",path); } private OnFinish onFinish; public interface OnFinish{ void OnFinishListener(ArrayList<HomeBean.DataBean> list); } public void setOnFinish(OnFinish finish){ this.onFinish=finish; } @Override public void getJson(String url) { list = new ArrayList<>(); Retrofit retrofit = new Retrofit.Builder().baseUrl(url).addConverterFactory(GsonConverterFactory.create()).addCallAdapterFactory(RxJavaCallAdapterFactory.create()).build(); ApiService apiService = retrofit.create(ApiService.class); final Observable<List<HomeBean>> home = apiService.getHome(path); home.subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(new Observer<List<HomeBean>>() { @Override public void onCompleted() { } @Override public void onError(Throwable e) { } @Override public void onNext(List<HomeBean> homeBeen) { list = (ArrayList<HomeBean.DataBean>) homeBeen.get(0).getData(); onFinish.OnFinishListener(list); } }); }}UserPresenter中
public class UserPresenter implements UserMode.OnFinish{ private final IUserView userView; private final UserMode userModel; public UserPresenter(IUserView userView,String url) { this.userView = userView; this.userModel = new UserMode(url); userModel.setOnFinish(this); } public void setNews(String url) { userModel.getJson(url); } @Override public void OnFinishListener(ArrayList<HomeBean.DataBean> list) { userView.getUser(list); }}MainActivity中
public class MainActivity extends AppCompatActivity implements IUserView{ private XRecyclerView re; private List<HomeBean.DataBean> data; UserPresenter userPresenter; private MyAdapter adapter; private int count; //暂停 private boolean flag = false;//是否在下载 LinearLayout line1; protected static final String TAG = "OtherActivity"; //下载线程的数量 private final static int threadsize = 3; protected static final int SET_MAX = 0; public static final int UPDATE_VIEW = 1; private ProgressBar pb; private TextView tv_info; private ArrayList<HomeBean.DataBean> arrayList; //显示进度和更新进度 private Handler mHandler = new Handler(){ public void handleMessage(android.os.Message msg) { switch (msg.what) { case SET_MAX://设置进度条的最大值 int filelength = msg.arg1; pb.setMax(filelength); break; case UPDATE_VIEW://更新进度条 和 下载的比率 int len = msg.arg1;//新下载的长度 pb.setProgress(pb.getProgress()+len);//设置进度条的刻度 int max = pb.getMax();//获取进度的最大值 int progress = pb.getProgress();//获取已经下载的数据量 // 下载：30 总：100 int result = (progress*100)/max; tv_info.setText("下载:"+result+"%"); if (result==100){ line1.setVisibility(View.GONE);} break; default: break; } }; }; String uri = "http://mnews.gw.com.cn/wap/style/data/news/txs/images/1510358537754.jpg"; /* txs/page_1.json*/ int pager=1; String url; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); arrayList=new ArrayList<HomeBean.DataBean>(); pb = (ProgressBar) findViewById(R.id.pb); tv_info = (TextView) findViewById(R.id.tv_info); re= (XRecyclerView) findViewById(R.id.xre_xrv); line1= (LinearLayout) findViewById(R.id.line1); url="txs/page_"+pager+".json"; userPresenter = new UserPresenter(this,url); userPresenter.setNews(Api.URLONE); //数据的回显 //确定下载的文件 String name = getFileName(uri); File file = new File(Environment.getExternalStorageDirectory(), name); if (file.exists()){//文件存在回显 //获取文件的大小 int filelength = (int) file.length(); pb.setMax(filelength); try { //统计原来所有的下载量 int count = 0; //读取下载记录文件 for (int threadid = 0; threadid < threadsize; threadid++) { //获取原来指定线程的下载记录 int existDownloadLength = readDownloadInfo(threadid); count = count + existDownloadLength; } //设置进度条的刻度 pb.setProgress(count); //计算比率 int result = (count * 100) / filelength; tv_info.setText("下载:" + result + "%"); } catch (Exception e) { e.printStackTrace(); } } } @Override public void getUser(ArrayList<HomeBean.DataBean> list) { if (pager==1){ Toast.makeText(MainActivity.this,"刷新",Toast.LENGTH_SHORT).show(); arrayList.clear(); } arrayList.addAll(list); adapter = new MyAdapter(MainActivity.this,arrayList); adapter.setOnItemClickLitener(new OnItemClickLitener() { @Override public void onItemClick(View view, int position) { line1.setVisibility(View.VISIBLE); //改变下载路径 uri=arrayList.get(position).getImg(); Toast.makeText(MainActivity.this,"111111111",Toast.LENGTH_SHORT).show(); flag = true; //是在下载 //bt_download.setEnabled(false);//一点击变成不可点击 // bt_pause.setEnabled(true);//一点击变成可点击 new Thread(){//子线程 public void run() { try { //获取服务器上文件的大小 HttpClient client = new DefaultHttpClient(); HttpHead request = new HttpHead(uri); HttpResponse response = client.execute(request); //response 只有响应头 没有响应体 if(response.getStatusLine().getStatusCode() == 200){ Header[] headers = response.getHeaders("Content-Length"); String value = headers[0].getValue(); //文件大小 int filelength = Integer.parseInt(value); Log.i(TAG, "filelength:"+filelength); //设置进度条的最大值 Message msg_setmax = Message.obtain(mHandler, SET_MAX, filelength, 0); msg_setmax.sendToTarget(); //处理下载记录文件 for(int threadid=0;threadid<threadsize;threadid++){ //对应的下载记录文件 File file = new File(Environment.getExternalStorageDirectory(),threadid+".txt"); //判断文件是否存在 if(!file.exists()){ //创建文件 file.createNewFile(); } } //在sdcard创建和服务器大小一样的文件 String name = getFileName(uri); File file = new File(Environment.getExternalStorageDirectory(),name); //随机访问文件 RandomAccessFile raf = new RandomAccessFile(file, "rwd"); //设置文件的大小 raf.setLength(filelength); //关闭 raf.close(); //计算每条线程的下载量 int block = (filelength%threadsize == 0)?(filelength/threadsize):(filelength/threadsize+1); //开启三条线程执行下载 for(int threadid=0;threadid<threadsize;threadid++){ new DownloadThread(threadid, uri, file, block).start(); } } } catch (Exception e) { e.printStackTrace(); } }; }.start(); } @Override public void onItemLongClick(View view, int position) { Toast.makeText(MainActivity.this,"长按",Toast.LENGTH_SHORT).show(); } }); re.setAdapter(adapter); re.setLayoutManager(new LinearLayoutManager(MainActivity.this)); re.setLoadingListener(new XRecyclerView.LoadingListener() { @Override public void onRefresh() { count++; pager=1; userPresenter=new UserPresenter(MainActivity.this,url); userPresenter.setNews(Api.URLONE); adapter.notifyDataSetChanged(); re.refreshComplete(); } @Override public void onLoadMore() { pager++; url="txs/page_"+pager+".json"; userPresenter=new UserPresenter(MainActivity.this,url); userPresenter.setNews(Api.URLONE); adapter.notifyDataSetChanged(); re.loadMoreComplete(); } }); } //线程下载类 private class DownloadThread extends Thread{ private int threadid;//线程的id private String uri;//下载的地址 private File file;//下载文件 private int block;//下载的块 private int start; private int end; public DownloadThread(int threadid, String uri, File file, int block) { super(); this.threadid = threadid; this.uri = uri; this.file = file; this.block = block; //计算下载的开始位置和结束位置 start = threadid * block; end = (threadid + 1)*block -1; try { //读取该条线程原来的下载记录 int existDownloadLength = readDownloadInfo(threadid); //修改下载的开始位置 从新下载 start = start + existDownloadLength; } catch (Exception e) { e.printStackTrace(); } } //下载 状态码：200是普通的下载 206是分段下载 Range:范围 @Override public void run() { super.run(); try { RandomAccessFile raf = new RandomAccessFile(file, "rwd"); //跳转到起始位置 raf.seek(start); //分段下载 HttpClient client = new DefaultHttpClient(); HttpGet request = new HttpGet(uri); request.addHeader("Range", "bytes:"+start+"-"+end);//添加请求头 HttpResponse response = client.execute(request); if(response.getStatusLine().getStatusCode() == 200){ InputStream inputStream = response.getEntity().getContent(); //把流写入到文件 byte[] buffer = new byte[1024]; int len = 0; while((len = inputStream.read(buffer)) != -1){ //如果暂停下载 点击暂停 false 就直接return 点击下载true接着下载 if(!flag){ return;//标准线程结束 } //写数据 raf.write(buffer, 0, len); //读取原来下载的数据量 这里读取是为了更新下载记录 int existDownloadLength = readDownloadInfo(threadid);//原来下载的数据量 //计算最新的下载 int newDownloadLength = existDownloadLength + len; //更新下载记录 从新记录最新下载位置 updateDownloadInfo(threadid, newDownloadLength); //更新进度条的显示 下载的百分比 Message update_msg = Message.obtain(mHandler, UPDATE_VIEW, len, 0); update_msg.sendToTarget(); //模拟 看到进度条动的效果 SystemClock.sleep(50); } inputStream.close(); raf.close(); Log.i(TAG, "第"+threadid+"条线程下载完成"); } } catch (Exception e) { e.printStackTrace(); } } } /** * 读取指定线程的下载数据量 * @param threadid 线程的id * @return * @throws Exception */ public int readDownloadInfo(int threadid) throws Exception{ //下载记录文件 File file = new File(Environment.getExternalStorageDirectory(),threadid+".txt"); BufferedReader br = new BufferedReader(new FileReader(file)); //读取一行数据 String content = br.readLine(); int downlength = 0; //如果该文件第一次创建去执行读取操作 文件里面的内容是 null if(!TextUtils.isEmpty(content)){ downlength = Integer.parseInt(content); } //关闭流 br.close(); return downlength; } /** * 更新下载记录 * @param threadid * @param newDownloadLength */ public void updateDownloadInfo(int threadid,int newDownloadLength) throws Exception{ //下载记录文件 File file = new File(Environment.getExternalStorageDirectory(),threadid+".txt"); FileWriter fw = new FileWriter(file); fw.write(newDownloadLength+""); fw.close(); } /** * 获取文件的名称 * @param uri * @return */ private String getFileName(String uri){ return uri.substring(uri.lastIndexOf("/")+1); }}MyAdapter中
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder>{ //条目点击 private OnItemClickLitener mOnItemClickLitener; public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener) { this.mOnItemClickLitener = mOnItemClickLitener; } Context context; List<HomeBean.DataBean> data; public MyAdapter(Context context, List<HomeBean.DataBean> data) { this.context = context; this.data = data; } @Override public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { MyViewHolder holder = new MyViewHolder(LayoutInflater.from( context).inflate(R.layout.item_home, parent, false)); return holder; } public void onBindViewHolder(final MyViewHolder holder, final int position) { holder.tv.setText(data.get(position).getTitle());//得到图片的url Uri uri= Uri.parse(data.get(position).getImg()); holder.draweeView.setImageURI(uri);//设置给Freso // 如果设置了回调，则设置点击事件 if (mOnItemClickLitener != null) { holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { int pos = holder.getLayoutPosition(); mOnItemClickLitener.onItemClick(holder.itemView, pos); } }); holder.itemView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { int pos = holder.getLayoutPosition(); mOnItemClickLitener.onItemLongClick(holder.itemView, pos); return false; } }); } } @Override public int getItemCount() { return data.size(); } class MyViewHolder extends RecyclerView.ViewHolder { TextView tv; public SimpleDraweeView draweeView; public MyViewHolder(View view) { super(view); tv = (TextView) view.findViewById(R.id.text1); draweeView=(SimpleDraweeView) view.findViewById(R.id.img); } }}Api中
public class Api { public static final String URLONE = "http://mnews.gw.com.cn/wap/data/news/";}ApiService中
public interface ApiService { @POST Observable<List<HomeBean>> getHome(@Url String url);}OnItemClickLitener中
public interface OnItemClickLitener { void onItemClick(View view, int position); void onItemLongClick(View view , int position);}MyApp中
public class MyApp extends Application{ @Override public void onCreate() { super.onCreate(); Fresco.initialize(this); }}阅读全文
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