Come usare il SwiperFreshlayout?

Question

sfondo

Google ha recentemente pubblicato Un aggiornamento alla sua libreria di supporto , che ora ha un nuovo " SwiperFreshlayout ".

La vista consente di avvolgere un'altra vista, mentre si supporta la scansione verso il basso per eseguire un'operazione di aggiornamento.

Screenshot:

il problema

Google non ha fornito un campione (almeno non uno che posso trovare, ancora), quindi ho provato a usarlo da solo.

All'inizio ho ottenuto un incidente (NPE) ogni volta che ho spazzato, ma poi ho scoperto che è perché non ho fornito un "onrefreshlister" per questo.

Ma non ho ancora come usarlo, per non parlare di personalizzarlo

Ecco l'XML del file Layout:

<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.swiperefreshlayouttest.MainActivity"
    tools:ignore="MergeRootFrame" >

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" >

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="TTT"
                android:textSize="40sp" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="TTT"
                android:textSize="40sp" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="TTT"
                android:textSize="40sp" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="TTT"
                android:textSize="40sp" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="TTT"
                android:textSize="40sp" />
        </LinearLayout>
    </ScrollView>

</android.support.v4.widget.SwipeRefreshLayout>

.

Codice, anche se non fa nulla di speciale:

public class MainActivity extends ActionBarActivity
  {
  @Override
  protected void onCreate(final Bundle savedInstanceState)
    {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final SwipeRefreshLayout swipeRefreshLayout=(SwipeRefreshLayout)findViewById(R.id.container);
    swipeRefreshLayout.setOnRefreshListener(new OnRefreshListener()
      {
        @Override
        public void onRefresh()
          {
          // do nothing
          }
      });
    }
  }

.

La domanda

Qual è il modo corretto per usare questa vista?

Come posso personalizzarlo? Attualmente è solo una linea nera ...

Answer 1

Dunno Qual è quella classe ActionBarActivity che stai estendendo è, ma ho capito bene solo usando una frammentazione

public class ActivityMain extends FragmentActivity implements OnRefreshListener {

    private SwipeRefreshLayout mSwipeRefreshLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setContentView(R.layout.activity_main);
        mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.container);
        mSwipeRefreshLayout.setOnRefreshListener(this);

        super.onCreate(savedInstanceState);
    }

    @Override
    public void onRefresh() {
        Toast.makeText(this, "Refresh", Toast.LENGTH_SHORT).show();
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                mSwipeRefreshLayout.setRefreshing(false);
            }
        }, 2000);
    }
}

.

Vale la pena indicare I Copia incollata il tuo layout XML esattamente come

In termini di personalizzazione, non c'è molto molto che puoi fare diverso dal colore del colore della barra colorata chiamando Setcolorscheme (int colorresid, int colorresid, int colorresid, int colorresid);

E.G.

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <color name="blue">#0099CC</color>
    <color name="purple">#9933CC</color>
    <color name="green">#669900</color>
    <color name="orange">#FF8800</color>

</resources>

.

mSwipeRefreshLayout.setColorScheme(R.color.blue, R.color.purple, R.color.green, R.color.orange);

È un tipo di aggiunta deludente davvero. La sensibilità sul rinfrescamento è abbastanza alta e non ci sono impostazione per cambiarlo

Modifica

L'ho scritto quando questa classe (e la classe generacodictagcode) era appena stata aggiunta all'SDK. Come tale, alcune cose sono cambiate da quando ho scritto questa risposta. Inoltre, il tipo di attività che usi non dovrebbe influire su questa soluzione.

ActionBarActivity è ora deprecato, è necessario utilizzare setColorScheme. (Puoi mettere quanti più ID colore lì come ti piace).

setColorSchemeResources(int... colorResIds) può anche essere utilizzato per impostare quanto in basso, un'utente deve scorrere per scatenare un aggiornamento.

Consiglio di controllare il Documentazione ufficiale Guarda cos'altro la classe ha da offrire.

Answer 2

mainactivity.java

public class MainActivity extends ActionBarActivity {
    TextView textView;
    private SwipeRefreshLayout mSwipeRefreshLayout;
    static int count = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    textView = (TextView) findViewById(R.id.scrollTextView);

    // /You will setup the action bar with pull to refresh layout
    mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.container);

     mSwipeRefreshLayout.setColorScheme(R.color.blue,
     R.color.green, R.color.orange, R.color.purple);
    mSwipeRefreshLayout.setOnRefreshListener(new OnRefreshListener() {
        @Override
        public void onRefresh() {
            Log.e(getClass().getSimpleName(), "refresh");
            new GetLinks().execute();
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

public class GetLinks extends AsyncTask<Void, Void, Void> {
    @Override
    protected void onPreExecute() {
        super.onPreExecute();

    }

    @Override
    protected Void doInBackground(Void... params) {

        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {

            e.printStackTrace();

        }
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        super.onPostExecute(result);
         //Here you can update the view
        textView.setText(textView.getText().toString()+"--New Content Added" + ++count);

        // Notify swipeRefreshLayout that the refresh has finished
        mSwipeRefreshLayout.setRefreshing(false);
    }

}

}

.

attività_main.xml

<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/scrollTextView"
                android:text="TTT"
                android:textSize="40sp" />
    </ScrollView>

</android.support.v4.widget.SwipeRefreshLayout>

.

colori.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <item name="blue" type="color">#FF33B5E5</item>
    <item name="purple" type="color">#FFAA66CC</item>
    <item name="green" type="color">#FF99CC00</item>
    <item name="orange" type="color">#FFFFBB33</item>

</resources>

.

Answer 3

Si prega di consultare il seguente per un esempio: http://developer.android.com/Campioni / SwiperFreshlayoutBasic / index.html

Answer 4

You can by simply following below method (I am using swipelayout on Expandable list ) Test.xml

  <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipe2"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_below="@id/RelativeTop"
        android:background="@drawable/listbg" >

        <ExpandableListView
            android:id="@+id/lvExp"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:cacheColorHint="@android:color/transparent"
            android:groupIndicator="@null"
            android:listSelector="@android:color/white" />
    </android.support.v4.widget.SwipeRefreshLayout>

ListHeader.xml

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:background="@drawable/sectionbg"
         android:orientation="horizontal"
         android:padding="8dp" >

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical"
    android:contentDescription="@string/contentdescription"
    android:src="@drawable/expandbtn" />

<TextView
    android:id="@+id/lblListHeader"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical"
    android:layout_marginLeft="3dp"
    android:text="this is test"
    android:textColor="@android:color/white"
    android:textSize="17sp" />

ChildItem.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="55dp"
android:background="@color/GrayProductBackground" >

<TextView
    android:id="@+id/lblListItem"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:layout_marginLeft="35dp"
    android:layout_marginRight="20dp"
    android:gravity="center_vertical"
    android:paddingBottom="5dp"
    android:textColor="@color/GrayTextProduct"
    android:textSize="17sp" />

<ImageView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_alignRight="@+id/lblListItem"
    android:layout_centerVertical="true"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:contentDescription="@string/arrowdescription"
    android:gravity="center"
    android:src="@drawable/navigationarrow" />

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="1dp"
    android:layout_alignParentBottom="true"
    android:background="@android:color/white" >
</RelativeLayout>

colors used

<color name="pDarkGreen">#8ec549</color>
<color name="pDarskSlowGreen">#c1f57f</color>
<color name="pLightGreen">#f7ffed</color>
<color name="pFullLightGreen">#d6d4d4</color>

Mainactivity.java

        swipeView = (SwipeRefreshLayout) findViewById(R.id.swipe2);
        swipeView.setColorSchemeResources(R.color.pDarkGreen, R.color.Gray, R.color.Yellow, R.color.pFullLightGreen);

swipeView.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
                @Override
                public void onRefresh() {

                        swipeView.setRefreshing(false);

                    }
                    (new Handler()).postDelayed(new Runnable() {
                        @Override
                        public void run() {

                            Log.d("Swipe", "Refreshing Number");

                        }
                    }, 0);
                }
            });

You can set swipeView.setRefreshing(false); to false or true according to your requirment this swipeing mechanisam will work in android's all API level

Answer 5

SwipeRefreshLayout with Kotlin

Xml file code

 <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        android:layout_width="0dp"
        android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="90dp" app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginBottom="93dp" app:layout_constraintEnd_toEndOf="parent"
        android:id="@+id/swipe_refresh_layout"
>
    <androidx.recyclerview.widget.RecyclerView
            android:layout_width="0dp"
            android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent"
            android:layout_marginTop="90dp" app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginBottom="93dp" app:layout_constraintEnd_toEndOf="parent"
            android:id="@+id/recyclerView"
    />
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

Activity Code

Declare the following code above the oncreate method

    var mSwipeRefreshLayout: SwipeRefreshLayout? = null

Declare the following code inside the oncreate method after setContentView line

mSwipeRefreshLayout= findViewById<SwipeRefreshLayout>(R.id.swipe_refresh_layout)
mSwipeRefreshLayout!!.setOnRefreshListener {
   //API Calls
}

On success API Call or failure API calls

                mSwipeRefreshLayout!!.isRefreshing = false

Answer 6

activity_main.xml

 <android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/swipe_refresh_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

<android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    android:visibility="gone"/>

MainActivity.java

public class MainActivity extends AppCompatActivity
    implements SwipeRefreshLayout.OnRefreshListener {

      static ViewPager viewPager;

     @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_refresh_layout);
    viewPager = (ViewPager) findViewById(R.id.viewpager);
    swipeRefreshLayout.setOnRefreshListener(this);
    swipeRefreshLayout.post(new Runnable() {
                                @Override
                                public void run() {
                                    swipeRefreshLayout.setRefreshing(true);
                                    setupViewPager(viewPager);
                                }
                            }
    );
}



 private void setupViewPager(ViewPager viewPager) {


swipeRefreshLayout.setRefreshing(false);


 }


}