我想进行可滑动的活动

Question

I'm working on an Android project and I want to make a swipeable activity that has a textview in it so When the user swipes the textview value changes!

I want to make the SingleItem class swipeable so that the user can see more content about the book when they swipe.

Here is my code!!!

MainActivity.java

public class MainActivity extends AppCompatActivity {

private RecyclerView mRecyclerView;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
List<Book> books;

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

    books = new ArrayList<>();
    books.add(new Book("Rich Dad Poor Dad", "Rich Dad Poor Dad is a 1997 book written by Robert Kiyosaki and Sharon Lechter.", "Robert Kiyosaki"));
    books.add(new Book("Awaken The Giant Within", "Wake up and take control of your life! From the bestselling author of Inner Strength, Unlimited Power, and MONEY Master the Game", "Anthony Robbins"));

    mRecyclerView = findViewById(R.id.my_recyclerview);
    mRecyclerView.setHasFixedSize(true);
    mLayoutManager = new LinearLayoutManager(this);
    mAdapter = new RecyclerViewAdapter(books, this);

    mRecyclerView.setLayoutManager(mLayoutManager);
    mRecyclerView.setAdapter(mAdapter);
}
}

RecyclerViewAdapter.java

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {

private List<Book> bookList;
private Context mContext;

public RecyclerViewAdapter(List<Book> bookList, Context mContext) {
    this.bookList = bookList;
    this.mContext = mContext;
}

@NonNull
@Override
public RecyclerViewAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view ;
    LayoutInflater mInflater = LayoutInflater.from(mContext);
    view = mInflater.inflate(R.layout.item_list,viewGroup,false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(@NonNull RecyclerViewAdapter.ViewHolder viewHolder, final int i) {
    viewHolder.bookTitle.setText(bookList.get(i).getmTitle());
    viewHolder.cardView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(mContext, SingleItem.class);
            intent.putExtra("Description", bookList.get(i).getmDescription());
            intent.putExtra("Author", bookList.get(i).getmAuthor());
            mContext.startActivity(intent);
        }
    });
}

@Override
public int getItemCount() {
    return bookList.size();
}

public static class ViewHolder extends RecyclerView.ViewHolder {

    public View view;
    public TextView bookTitle;
    public CardView cardView;

    public ViewHolder(@NonNull View itemView) {
        super(itemView);

        bookTitle = itemView.findViewById(R.id.book_title);
        cardView = itemView.findViewById(R.id.my_card_view);
        view = itemView;
    }
}

SingleItem.java

public class SingleItem extends AppCompatActivity {

private TextView bookDescription, bookAuthor;

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

    bookDescription = findViewById(R.id.book_description);
    bookAuthor = findViewById(R.id.book_author);

    // Recieve data
    Intent intent = getIntent();
    String Desc = intent.getExtras().getString("Description");
    String Author = intent.getExtras().getString("Author");

    bookDescription.setText(Desc);
    bookAuthor.setText(Author);
}

Book.java

public class Book {

private String mTitle;
private String mDescription;
private String mAuthor;

public Book(){
}

public Book(String mTitle, String mDescription, String mAuthor) {
    this.mTitle = mTitle;
    this.mDescription = mDescription;
    this.mAuthor = mAuthor;
}

public String getmTitle() {
    return mTitle;
}

public void setmTitle(String mTitle) {
    this.mTitle = mTitle;
}

public String getmDescription() {
    return mDescription;
}

public void setmDescription(String mDescription) {
    this.mDescription = mDescription;
}

public String getmAuthor() {
    return mAuthor;
}

public void setmAuthor(String mAuthor) {
    this.mAuthor = mAuthor;
}
}

I want to make the SingleItem class swipeable so that the user can see more content about the book when they swipe.

Answer 1

Use SwipeRefreshLayout in your activity to Swipe down and update textview

    <android.support.v7.widget.SwipeRefreshLayout
    android:id="@+id/pullToRefresh"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
</android.support.v7.widget.SwipeRefreshLayout>

Then in your Activity.java

TextView mTextView;

@Override
protected void onCreate(Bundle savedInstanceState) {
mTextView=findViewById(R.id.textView);
super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    SwipeRefreshLayout pullToRefresh = findViewById(R.id.pullToRefresh);
    pullToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            mTextView.setText("My new text") // update here
            pullToRefresh.setRefreshing(false);
        }
    });
}

Answer 2

Maybe you'd like to use an SeekBar? It has to be swiped and TextView has to be showing text, not vice versa. Set your SeekBar and TextView:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical"
              android:padding="@dimen/small_padding">

    <TextView
            android:id="@+id/text_progress"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

    <SeekBar
            android:id="@+id/seek_bar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:max="100"/>

</LinearLayout>

Then, MainActivity.java:

public class MainActivity extends AppCompatActivity {

TextView textView;
SeekBar seekBar;

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

    textView = findViewById(R.id.text_progress);
    seekBar = findViewById(R.id.seek_bar);

    seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
            textView.setText("Your progress is " + progress);
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {

        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {

        }
    });

    }
}