黑马程序员——fragment 与Activity 之间的通信

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在fragment1中设置fragment2的内容（）
public class Fragment1 extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment1, null);
Button button =(Button) view.findViewById(R.id.bt);
button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Main_activity activity=(Main_activity) getActivity();
Fragment2 fragment2=(Fragment2)activity.getFragmentManager().findFragmentById(R.id.tv2);
fragment2.setText("内容变化了");
}
});
return view;
}

}

public class Fragment2 extends Fragment {
private TextView tv;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.fragment2, null);
tv=(TextView) view.findViewById(R.id.tv2);
return view;
}

public void setText(String string) {
tv.setText(string);
}
}