Sau khi Google mình tìm thấy thư viện AndroidSwipeLayout có hỗ trợ các hiệu ứng khá đẹp. Thư viện khi kết hợp với RecycleView sẽ tạo ra nhiều option cho người dùng chọn khi swipe trái/phải màn hình.
Các bước thực hiện như sau:
Bước 1: Add thư viện
Mở file gradle và thêm dòng sau.
compile 'com.daimajia.swipelayout:library:1.2.0@aar'Bước 2: Định nghĩa item của listview
Trong phần res/layout, thêm file swipe_row_item.xml dùng để định nghĩa một thành phần của Listview.
<?xml version="1.0" encoding="utf-8" ?>
<com.daimajia.swipe.SwipeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:swipe="http://schemas.android.com/apk/res-auto"
android:id="@+id/swipe"
android:layout_width="match_parent"
android:layout_height="73dp"
swipe:leftEdgeSwipeOffset="0dp"
swipe:rightEdgeSwipeOffset="0dp">
<!--Bottom View For Right to Left-->
<LinearLayout
android:id="@+id/bottom_wrapper"
android:layout_width="240dp"
android:layout_height="match_parent"
android:weightSum="3">
<TextView
android:id="@+id/tvEdit"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#0076a5"
android:gravity="center"
android:text="Edit"
android:textColor="#fff" />
<TextView
android:id="@+id/tvShare"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#003c54"
android:gravity="center"
android:text="Share"
android:textColor="#fff" />
<TextView
android:id="@+id/tvDelete"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#0076a5"
android:gravity="center"
android:text="Delete"
android:textColor="#fff" />
</LinearLayout>
<!-- Another Bottom View For Left to Right -->
<LinearLayout
android:id="@+id/bottom_wrapper1"
android:layout_width="80dp"
android:layout_height="match_parent"
android:weightSum="1">
<ImageButton
android:id="@+id/btnLocation"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@null"
android:gravity="center"
android:src="@drawable/location_icon" />
</LinearLayout>
<!-- Top View, Row itemView of RecyclerView -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="73dp"
android:background="?android:selectableItemBackground"
android:orientation="horizontal">
<RelativeLayout
android:layout_width="85dp"
android:layout_height="match_parent"
android:paddingLeft="18dp"
android:paddingRight="18dp"
android:paddingTop="8dp"
android:paddingBottom="8dp">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/contact_default"/>
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingRight="18dp"
android:paddingTop="15dp"
android:paddingBottom="15dp">
>
<!--contact name layout-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/tvName"
android:layout_width="200dp"
android:layout_height="20dp"
android:text="Name"
android:textColor="@android:color/black"
android:textSize="16sp" />
<TextView
android:id="@+id/tvDeliveryStatus"
android:layout_width="match_parent"
android:layout_height="20dp"
android:gravity="right"
android:textAlignment="gravity"
android:text="Sent"/>
</LinearLayout>
<!--message content-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/tvEmailId"
android:layout_width="200dp"
android:layout_height="20dp"
android:layout_below="@+id/tvName"
android:text="Email Id"
android:textColor="@android:color/black"
android:textSize="12sp" />
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:adjustViewBounds="true"
android:scaleType="fitEnd"
android:src="@drawable/facebook_icon"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
</com.daimajia.swipe.SwipeLayout>
Bước 3: Tạo lớp Student.package com.blogspot.simplecodecjava.swiperecycleview;
import java.io.Serializable;
public class Student implements Serializable {
private static final long serialVersionUID = 1L;
private String name;
private String emailId;
public Student() {
}
public Student(String name, String emailId) {
this.name = name;
this.emailId = emailId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmailId() {
return emailId;
}
public void setEmailId(String emailId) {
this.emailId = emailId;
}
}
Bước 4: Tạo lớp SwipeRecyclerViewAdapter kế thừa từ RecyclerSwipeAdapter.package com.blogspot.simplecodecjava.swiperecycleview;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;
import com.daimajia.swipe.SwipeLayout;
import com.daimajia.swipe.adapters.RecyclerSwipeAdapter;
import com.slab.schedulerchat.R;
import java.util.ArrayList;
public class SwipeRecyclerViewAdapter extends RecyclerSwipeAdapter<SwipeRecyclerViewAdapter.SimpleViewHolder> {
private Context mContext;
private ArrayList<Student> studentList;
public SwipeRecyclerViewAdapter(Context context, ArrayList<Student> objects) {
this.mContext = context;
this.studentList = objects;
}
@Override
public SimpleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.swipe_row_item, parent, false);
return new SimpleViewHolder(view);
}
@Override
public void onBindViewHolder(final SimpleViewHolder viewHolder, final int position) {
final Student item = studentList.get(position);
viewHolder.tvName.setText((item.getName()) + " - Row Position " + position);
viewHolder.tvEmailId.setText(item.getEmailId());
viewHolder.swipeLayout.setShowMode(SwipeLayout.ShowMode.PullOut);
// Drag From Left
viewHolder.swipeLayout.addDrag(SwipeLayout.DragEdge.Left, viewHolder.swipeLayout.findViewById(R.id.bottom_wrapper1));
// Drag From Right
viewHolder.swipeLayout.addDrag(SwipeLayout.DragEdge.Right, viewHolder.swipeLayout.findViewById(R.id.bottom_wrapper));
// Handling different events when swiping
viewHolder.swipeLayout.addSwipeListener(new SwipeLayout.SwipeListener() {
@Override
public void onClose(SwipeLayout layout) {
//when the SurfaceView totally cover the BottomView.
}
@Override
public void onUpdate(SwipeLayout layout, int leftOffset, int topOffset) {
//you are swiping.
}
@Override
public void onStartOpen(SwipeLayout layout) {
}
@Override
public void onOpen(SwipeLayout layout) {
//when the BottomView totally show.
}
@Override
public void onStartClose(SwipeLayout layout) {
}
@Override
public void onHandRelease(SwipeLayout layout, float xvel, float yvel) {
//when user's hand released.
}
});
/*viewHolder.swipeLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if ((((SwipeLayout) v).getOpenStatus() == SwipeLayout.Status.Close)) {
//Start your activity
Toast.makeText(mContext, " onClick : " + item.getName() + " \n" + item.getEmailId(), Toast.LENGTH_SHORT).show();
}
}
});*/
viewHolder.swipeLayout.getSurfaceView().setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(mContext, " onClick : " + item.getName() + " \n" + item.getEmailId(), Toast.LENGTH_SHORT).show();
}
});
viewHolder.btnLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(v.getContext(), "Clicked on Map " + viewHolder.tvName.getText().toString(), Toast.LENGTH_SHORT).show();
}
});
viewHolder.tvShare.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(view.getContext(), "Clicked on Share " + viewHolder.tvName.getText().toString(), Toast.LENGTH_SHORT).show();
}
});
viewHolder.tvEdit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(view.getContext(), "Clicked on Edit " + viewHolder.tvName.getText().toString(), Toast.LENGTH_SHORT).show();
}
});
viewHolder.tvDelete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mItemManger.removeShownLayouts(viewHolder.swipeLayout);
studentList.remove(position);
notifyItemRemoved(position);
notifyItemRangeChanged(position, studentList.size());
mItemManger.closeAllItems();
Toast.makeText(view.getContext(), "Deleted " + viewHolder.tvName.getText().toString(), Toast.LENGTH_SHORT).show();
}
});
// mItemManger is member in RecyclerSwipeAdapter Class
mItemManger.bindView(viewHolder.itemView, position);
}
@Override
public int getItemCount() {
return studentList.size();
}
@Override
public int getSwipeLayoutResourceId(int position) {
return R.id.swipe;
}
// ViewHolder Class
public static class SimpleViewHolder extends RecyclerView.ViewHolder {
SwipeLayout swipeLayout;
TextView tvName;
TextView tvEmailId;
TextView tvDelete;
TextView tvEdit;
TextView tvShare;
ImageButton btnLocation;
public SimpleViewHolder(View itemView) {
super(itemView);
swipeLayout = (SwipeLayout) itemView.findViewById(R.id.swipe);
tvName = (TextView) itemView.findViewById(R.id.tvName);
tvEmailId = (TextView) itemView.findViewById(R.id.tvEmailId);
tvDelete = (TextView) itemView.findViewById(R.id.tvDelete);
tvEdit = (TextView) itemView.findViewById(R.id.tvEdit);
tvShare = (TextView) itemView.findViewById(R.id.tvShare);
btnLocation = (ImageButton) itemView.findViewById(R.id.btnLocation);
}
}
}
Bước 5: Khai báo MainAtivity.package com.blogspot.simplecodecjava.swiperecycleview;
import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private ArrayList<Student> mDataSet;
private String TAG = MainActivity.class.getName();
private Toolbar toolbar;
private TextView tvEmptyView;
private RecyclerView mRecyclerView;
private volatile static MainActivity mInstance;
public static MainActivity getInstance(Context context){
if(mInstance == null){
synchronized (MainActivity.class){
if(mInstance == null){
mInstance = new MainActivity();
}
}
}
return mInstance;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
tvEmptyView = (TextView) findViewById(R.id.empty_view);
mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mDataSet = new ArrayList<Student>();
if (toolbar != null) {
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Android Students");
}
loadData();
if (mDataSet.isEmpty()) {
mRecyclerView.setVisibility(View.GONE);
tvEmptyView.setVisibility(View.VISIBLE);
} else {
mRecyclerView.setVisibility(View.VISIBLE);
tvEmptyView.setVisibility(View.GONE);
}
SwipeRecyclerViewAdapter mAdapter = new SwipeRecyclerViewAdapter(this, mDataSet);
mRecyclerView.setAdapter(mAdapter);
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
Log.e("RecyclerView", "onScrollStateChanged");
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
}
});
}
public void loadData() {
for (int i = 0; i <= 20; i++) {
mDataSet.add(new Student("Student " + i, "androidstudent" + i + "@gmail.com"));
}
}
}
Bước 6: Khai báo activity_main layout.<?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.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FF4081"
android:elevation="8dp"
android:minHeight="?attr/actionBarSize">
</android.support.v7.widget.Toolbar>
<android.support.v7.widget.RecyclerView
android:id="@+id/my_recycler_view"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="5dp"
android:layout_weight="1"
android:scrollbars="vertical" />
<TextView
android:id="@+id/empty_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="No Records"
android:visibility="gone" />
</LinearLayout>
Bạn có thể tải project mẫu tại đây.
Nguồn: blogger.com
![[Thuật toán] Tìm đường đi giữa hai đỉnh của đồ thị.](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsdgi0RpCKaFJQQ8D0CxzD8_tGGMbuLOU6BFDo1rBlb5NI9GaUZCndf4Sk821tJWK1JJNo1dEL_O_ioK5f4WDPeqcEsQNElltdGoUogjGp1x0qtegA3SBlUeotGYfo0snMaE7RdqUO4v-9/s72-c/DFS.jpg "[Thuật toán] Tìm đường đi giữa hai đỉnh của đồ thị.")
![[Thuật toán] Tìm đường đi và chu trình Hamilton.](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5gR4mcSp-MNN3e9DrlZmf17Kner34asFrCx9V1y8hovZkBY8QUejykEhklT3ThJYBd9nqX8W4jzo2q-cqpjDsuovRV5GkoaRi4Kr4ja4gC4EBnvRIJKhg_zY27f5NSPgp-a2MhykO2crW/s72-c/Untitled-1.jpg "[Thuật toán] Tìm đường đi và chu trình Hamilton.")
![[Bài toán] Liệt kê các xâu nhị phân độ dài n bằng thuật toán Back Track](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgp5xwmZCo8KiFro5nhwFFgn1kZRViBvBHuUNtJr4YJDUl91xsWc54aGmHzr4QbIk0G8UTGgOsT1aAc85nL0x1e67x8F0Bt4luja8kUgrrt8nVW0qWpoX0HGDDfo7FrvZNS004n1sivOHTH/s72-c/xau-nhi-phan.jpg "[Bài toán] Liệt kê các xâu nhị phân độ dài n bằng thuật toán Back Track")
![[Thuật toán] Tìm đường đi và Chu trình Euler](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgtS2TNOMwrMLYlV96JypsFRfQenVP-phWqgdGTleFwPvGKjLR1wzvffMcH4AWXqA9yVczhMOPthHuYRnrMK4ygEjCCoCvzKDol22QTpmk3cjl2fe4pVg3-6KIFfh8ObWul0OTYjLmle5Bx/s72-c/Untitled-1.jpg "[Thuật toán] Tìm đường đi và Chu trình Euler")