com.manning.androidhacks.hack029.MainActivity.java Source code

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Here is the source code for com.manning.androidhacks.hack029.MainActivity.java

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/*******************************************************************************
 * Copyright (c) 2012 Manning
 * See the file license.txt for copying permission.
 ******************************************************************************/
package com.manning.androidhacks.hack029;

import com.manning.androidhacks.hack029.adapter.ColorAdapter;

import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;

public class MainActivity extends FragmentActivity {

    private ViewPager mViewPager;
    private ColorAdapter mAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        setContentView(R.layout.main);

        mViewPager = (ViewPager) findViewById(R.id.pager);
        mAdapter = new ColorAdapter(getSupportFragmentManager());
        mViewPager.setAdapter(mAdapter);

        mViewPager.setOnPageChangeListener(new OnPageChangeListener() {

            @Override
            public void onPageSelected(int position) {
                if (mAdapter.usesLandscape(position)) {
                    allowOrientationChanges();
                } else {
                    enforcePortrait();
                }

            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
            }
        });
    }

    public void allowOrientationChanges() {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);
    }

    public void enforcePortrait() {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    }
}