RecyclerView如何实现侧滑和网络断点续传

蜗牛 互联网技术资讯 2022-07-27 24 0

本篇内容介绍了“RecyclerView如何实现侧滑和网络断点续传”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!

RecyclerView侧滑

主布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

<android.support.v7.widget.RecyclerView
    android:id="@+id/myrecycler"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>

</LinearLayout>

侧滑布局

<com.daimajia.swipe.SwipeLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="wrap_content">
<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
    <Button
        android:text="删除"
        android:id="@+id/b2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <Button
        android:text="添加"
        android:id="@+id/b3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

<TextView
    android:textSize="20dp"
    android:id="@+id/t1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

</com.daimajia.swipe.SwipeLayout>

适配器

public class MyAdapter1 extends RecyclerView.Adapter<MyAdapter1.RVHolder> {

ArrayList<String> list= new ArrayList<>();
public void refershData(ArrayList<String> mlist){
    list.addAll( mlist);
    notifyDataSetChanged();
}
@NonNull
@Override
public RVHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.name1,viewGroup,false);
    return new RVHolder(view);
}

@Override
public void onBindViewHolder(@NonNull RVHolder rvHolder, final int i) {
    rvHolder.textView.setText(list.get(i));
    rvHolder.button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            isonclick.itemonclick(i);
        }
    });

}

public interface Isonclick{
    public void itemonclick(int id);
}
Isonclick isonclick;

public void  Onclick(Isonclick isonclick) {
    this.isonclick = isonclick;
}
@Override
public int getItemCount() {
    return list.size();
}

class RVHolder extends RecyclerView.ViewHolder{
    TextView textView;
    Button button;
    public RVHolder(@NonNull View itemView) {
        super(itemView);
        textView = itemView.findViewById(R.id.t1);
        button = itemView.findViewById(R.id.b2);
    }
}
}

Activity

public class MainActivity extends AppCompatActivity {
RecyclerView recyclerView;

MyAdapter1 myAdapter1;

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

    init();
    initData();

}

private void init() {
    recyclerView = findViewById(R.id.myrecycler);
    final LinearLayoutManager manager = new LinearLayoutManager(this);
    manager.setOrientation(LinearLayoutManager.VERTICAL);
    recyclerView.setLayoutManager(manager);

    myAdapter1 = new MyAdapter1();
    recyclerView.setAdapter(myAdapter1);


    myAdapter1.Onclick(new MyAdapter1.Isonclick() {
        @Override
        public void itemonclick(int id) {
            myAdapter1.list.remove(id);
            myAdapter1.notifyDataSetChanged();
        }
    });

}

public void initData(){
   ArrayList<String> list= new ArrayList<>();
    for (int i=0;i<80;i++){
        list.add("第"+i+"个");
    }
    myAdapter1.refershData(list);

}
}

效果

RecyclerView如何实现侧滑和网络断点续传  recyclerview 第1张

网络断点续传

public class Demo extends AppCompatActivity implements View.OnClickListener {

long start = 0;
long end = 1024*1024;
long max;
int time = 0;
int sum = 0;

SeekBar bar;
Button jixu;
Button parse;

int temp;

Handler handler = new Handler(){
    @Override
    public void handleMessage(Message msg) {
        switch (msg.what){
            case 100:
                if(msg.obj != null){
                    if(time < 5){
                        new MyThread().start();
                        time++;
                    }else if(sum >= max){
                        handler.sendEmptyMessage(200);
                    }
                    Log.e("##########",msg.obj.toString());
                }
                break;
                case 200:
                    Log.e("###########","下载完成");
                    break;
            case 300:
                bar.setProgress(sum);
                break;
        }
    }
};

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

    initView();
    try {
        max = new MyTask().execute("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4").get();
        bar.setMax((int) max);
    } catch (ExecutionException e) {
        e.printStackTrace();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    new MyThread().start();
}

@Override
public void onClick(View v) {
    switch (v.getId()){
        case R.id.start:
            if(temp >= 0) {
                time = temp;
                temp = -1;
                new MyThread().start();
            }
            break;
        case R.id.parse:
            temp = time;
            time = 5;
            Message message = new Message();
            message.what = 100;
            handler.sendMessage(message);
            break;
            default:
                break;
    }
}

class MyTask extends AsyncTask<String,String,Integer>{
    @Override
    protected Integer doInBackground(String... strings) {
        try {
            URL url = new URL(strings[0]);
            HttpURLConnection hu = (HttpURLConnection) url.openConnection();
            if(hu.getResponseCode() == 200){
                int length = hu.getContentLength();
                return length;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

private void initView() {
    bar = findViewById(R.id.bar);
    jixu = findViewById(R.id.start);
    parse = findViewById(R.id.parse);
    jixu.setOnClickListener(this);
    parse.setOnClickListener(this);
}

private class MyThread extends Thread {
    @Override
    public void run() {
        try {
            URL url = new URL("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4");
            HttpURLConnection hu = (HttpURLConnection) url.openConnection();
            hu.setRequestMethod("GET");
            hu.setDoInput(true);
            hu.setDoOutput(true);
            String path = Environment.getExternalStorageDirectory().getPath();
            File ff = new File(path, "wang.mp4");
            RandomAccessFile file = new RandomAccessFile(ff, "rw");
            file.seek(start);
            hu.setRequestProperty("Range","bytes="+start+"-"+end);
            InputStream is = null;
            if(hu.getResponseCode() == 206){

                int l = 0;
                byte[] b = new byte[1024];
                is = hu.getInputStream();
                while ((l = is.read(b)) != -1){
                    file.write(b,0,l);
                    sum += l;

                    Message msg = new Message();
                    msg.what = 300;
                    handler.sendMessage(msg);
                }

                start = end+1;
                end += 1024*1024;

                Message message = new Message();
                message.what = 100;
                String ss = "正在下载"+start+"--"+end;
                message.obj = ss;
                handler.sendMessage(message);
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
}

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