[code]_[fragment interact activi

活动中获取碎片对象

• 只能获取活动绑定布局文件中的碎片

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button)findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FragmentManager fragmentManager = getFragmentManager();
//                anotherright r = (anotherright)fragmentManager.findFragmentById(R.id.another_right_layout);  //这个不能获取，因为another_right_layout布局不在这个活动绑定的layout.activity_main.xml文件中
                right ri = (right)fragmentManager.findFragmentById(R.id.right_fragment);
                FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.replace(R.id.right_fragment, r);
                fragmentTransaction.commit();
            }
        });