GridViewPager example

activity_watch_face.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.wearable.view.WatchViewStub
    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:id="@+id/watch_view_stub"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:rectLayout="@layout/rect_activity_watch_face"
    app:roundLayout="@layout/round_activity_watch_face"
    tools:context="schwiz.net.clockfacelauncher.WatchFace"
    tools:deviceIds="wear">
</android.support.wearable.view.WatchViewStub>

digital_clock.xml

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

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <TextClock
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/textClock"
        android:layout_centerInParent="true"
        android:layout_marginTop="58dp" />
</RelativeLayout>

ExampleAdapter.java

package schwiz.net.example;


import android.content.Context;
import android.graphics.Color;
import android.support.wearable.view.GridPagerAdapter;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;

import java.util.Random;

public class ExampleAdapter extends GridPagerAdapter{

    final Context mContext;

    public ExampleAdapter(final Context context) {
        mContext = context.getApplicationContext();
    }

    @Override
    public int getRowCount() {
        return 2;
    }

    @Override
    public int getColumnCount(int i) {
        if(i == 0) {
            return 1;
        } else {
            return 4;
        }
    }

    @Override
    public int getCurrentColumnForRow(int row, int currentColumn) {
        int ret = super.getCurrentColumnForRow(row, currentColumn);
        Log.d("test", String.format("getCurColForRow: ret=%d   row=%d   curCol=%d", ret, row, currentColumn));
        return super.getCurrentColumnForRow(row, currentColumn);
    }

    @Override
    protected Object instantiateItem(ViewGroup viewGroup, int row, int col) {
        Log.d("test", "instantiateItem: row=" + row + " col=" + col);
        View v;
        if(row == 0){
            v = View.inflate(mContext, R.layout.digital_clock, null);
        } else {
            Random random = new Random();
            v = View.inflate(mContext, R.layout.testview, null);
            v.setBackgroundColor(Color.rgb(random.nextInt(255), random.nextInt(255), random.nextInt(255)));
        }
        viewGroup.addView(v);
        return v;
    }

    @Override
    protected void destroyItem(ViewGroup viewGroup, int i, int i2, Object o) {
        Log.d("test", "destroyItem  row=" + i + " col=" +i2);
         viewGroup.removeView((View)o);
    }

    @Override
    public boolean isViewFromObject(View view, Object o) {
        Log.d("test", "isViewFromObject");
        return view.equals(o);
    }
}

Main.java

package schwiz.net.example;

import android.app.Activity;
import android.os.Bundle;
import android.support.wearable.view.GridViewPager;
import android.support.wearable.view.WatchViewStub;
import android.util.Log;

public class Main extends Activity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_watch_face);
        final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);
        stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() {
            @Override
            public void onLayoutInflated(WatchViewStub stub) {
                GridViewPager pager = (GridViewPager)stub.findViewById(R.id.pager);
                pager.setAdapter(new ExampleAdapter(Main.this));
            }
        });
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.d("test", "onPause");
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.d("test", "onResume");
    }
}

rect_activity_watch_face.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="schwiz.net.clockfacelauncher.WatchFace"
    tools:deviceIds="wear_square">

    <android.support.wearable.view.GridViewPager android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:id="@+id/pager"/>


</LinearLayout>

testview.xml

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

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/testview"
    android:layout_width="match_parent" android:layout_height="match_parent">

</FrameLayout>