fragment向activity传递数据-1

通过接口回调方式传递数据

//fragment

public class MainActivity extends Fragment implementsOnClickListener{

private TextView city1;

private TextView city2;

private TextView city3;

private TextView city4;

public MyListener myListener;

//自定义接口，传递数据

public interface MyListener{

public void sendData(int city_id);

}

//当fragment被添加进activity时被调用

@Override

public void onAttach(Activity activity) {

// TODO Auto-generated method stub

//传递activity对象

myListener = (MyListener) activity;

super.onAttach(activity);

}

public View onCreateView(LayoutInflater inflater, ViewGroupcontainer,

Bundle savedInstanceState) {

// TODO Auto-generated method stub

View v =inflater.inflate(R.layout.my_city_fragment,container,false);

city1 = (TextView) v.findViewById(R.id.city_bj);

city2 = (TextView) v.findViewById(R.id.city_sh);

city3 = (TextView) v.findViewById(R.id.city_cs);

city4 = (TextView) v.findViewById(R.id.city_zz);

city1.setOnClickListener(this);

city2.setOnClickListener(this);

city3.setOnClickListener(this);

city4.setOnClickListener(this);

//默认显示第一张图片

city1.setBackgroundColor(Color.GRAY);

myListener.sendData(R.drawable.tiananmen);

return v;

}

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

city1.setBackgroundColor(Color.WHITE);

city2.setBackgroundColor(Color.WHITE);

city3.setBackgroundColor(Color.WHITE);

city4.setBackgroundColor(Color.WHITE);

if (v.getId()==R.id.city_bj) {

city1.setBackgroundColor(Color.GRAY);

myListener.sendData(R.drawable.tiananmen);

}

if (v.getId()==R.id.city_sh) {

city2.setBackgroundColor(Color.GRAY);

myListener.sendData(R.drawable.dongfangmingzhu);

}

if (v.getId()==R.id.city_cs) {

city3.setBackgroundColor(Color.GRAY);

myListener.sendData(R.drawable.hunanweishi);

}

if (v.getId()==R.id.city_zz) {

city4.setBackgroundColor(Color.GRAY);

myListener.sendData(R.drawable.shennongta);

}

}

}

//activity

public class CityActivity extends FragmentActivity implementsMyListener{ //实现自定义接口

private ImageView imageView;

protected void onCreate(Bundle arg0) {

// TODO Auto-generated method stub

super.onCreate(arg0);

requestWindowFeature(Window.FEATURE_NO_TITLE);

this.setContentView(R.layout.activity_main);

imageView = (ImageView) findViewById(R.id.city_img);

imageView.setBackgroundResource(R.drawable.tiananmen);

//显示Fragment

 //1、获取Fragment管理器

FragmentManager fm = getSupportFragmentManager();

 //2、获取Fragment事务

FragmentTransaction tr = fm.beginTransaction();

//3、将Fragment替换掉FrameLayout

tr.replace(R.id.city_fram, new MainActivity());

 //4、提交事务

tr.commit();

}

@Override

public void sendData(int city_id) {

// TODO Auto-generated method stub

imageView.setBackgroundResource(city_id);

}

}