fragment切换

TwoActivity

public class TwoActivity extends FragmentActivity {

private Button btn_zhuxiao;
private SharedPreferences sharedPreferences;
private ViewPager viewPager;
private TextView text_1;
private TextView text_2;
private TextView text_3;
private RadioGroup group;
private List<Fragment> list;

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_two);
    btn_zhuxiao = (Button) findViewById(R.id.btn_zhuxiao);

    viewPager = (ViewPager) findViewById(R.id.viewPager);
    text_1 = (TextView) findViewById(R.id.text_1);
    text_2 = (TextView) findViewById(R.id.text_2);
    text_3 = (TextView) findViewById(R.id.text_3);
    group = (RadioGroup) findViewById(R.id.group);
    sharedPreferences = getSharedPreferences("1606B", MODE_PRIVATE);
    // 注销
    ZhuXIao();
    // 创建容器并添加
    list = new ArrayList<Fragment>();
    list.add(new AFragment());
    list.add(new BFragment());
    list.add(new CFragment());
    viewPager.setAdapter(new FragmentPagerAdapter(
            getSupportFragmentManager()) {

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return list.size();
        }

        @Override
        public Fragment getItem(int arg0) {
            // TODO Auto-generated method stub
            return list.get(arg0);
        }
    });
    group.setOnCheckedChangeListener(new OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            // TODO Auto-generated method stub
            switch (checkedId) {
            case R.id.radio_1:
                viewPager.setCurrentItem(0);
                break;
            case R.id.radio_2:
                viewPager.setCurrentItem(1);
                break;
            case R.id.radio_3:
                viewPager.setCurrentItem(2);
                break;

            default:
                break;
            }
        }
    });
    viewPager.setOnPageChangeListener(new OnPageChangeListener() {

        @Override
        public void onPageSelected(int arg0) {
            // TODO Auto-generated method stub
            switch (arg0) {
            case 0:
                group.check(R.id.radio_1);
                text_1.setBackground(getResources().getDrawable(R.color.red));
                text_2.setBackground(getResources().getDrawable(R.color.green));
                text_3.setBackground(getResources().getDrawable(R.color.green));
                break;
            case 1:
                group.check(R.id.radio_2);
                text_1.setBackground(getResources().getDrawable(R.color.green));
                text_2.setBackground(getResources().getDrawable(R.color.red));
                text_3.setBackground(getResources().getDrawable(R.color.green));
                break;
            case 2:
                group.check(R.id.radio_3);
                text_1.setBackground(getResources().getDrawable(R.color.green));
                text_2.setBackground(getResources().getDrawable(R.color.green));
                text_3.setBackground(getResources().getDrawable(R.color.red));
                break;

            default:
                break;
            }
        }

        @Override
        public void onPageScrolled(int arg0, float arg1, int arg2) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onPageScrollStateChanged(int arg0) {
            // TODO Auto-generated method stub

        }
    });

}

/**
 * 注销
 */
private void ZhuXIao() {
    btn_zhuxiao.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Editor editor = sharedPreferences.edit();
            editor.clear();
            editor.commit();
            startActivity(new Intent(TwoActivity.this, MainActivity.class));
            finish();
        }
    });
}

}

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