Activity和fragment传值问题
2016-09-29 20:54
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Activity传值给Fragment
Fragment f=new WeatherFragment();
Bundle data=new Bundle();
data.putString("city",cityList.get(index));
f.setArguments(data);
Fragment向activity中传值
1.在Fragment中写一个回调接口
2.在activity中实现这个回调接口
3,在Fragment中onAttach 方法中得到activity中实现好的 实例化接口对象
4,用接口的对象 进行传值
代码:
MainActivity:
[java] view
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package com.qianfeng.fragmenttoactivity;
import com.qianfeng.fragmenttoactivity.Fragmen1.CallBackValue;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.view.Menu;
import android.widget.TextView;
@SuppressLint("NewApi")
public class MainActivity extends Activity implements CallBackValue{
private TextView tv1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv1 = (TextView) findViewById(R.id.tv1);
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.add(R.id.contents, new Fragmen1());
transaction.commit();
}
//要获取的值 就是这个参数的值
@Override
public void SendMessageValue(String strValue) {
// TODO Auto-generated method stub
tv1.setText(strValue);
}
}
Fragment:
[java] view
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print?
package com.qianfeng.fragmenttoactivity;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
@SuppressLint("NewApi")
public class Fragmen1 extends Fragment{
private Button btn1;
private EditText et1;
CallBackValue callBackValue;
/**
* fragment与activity产生关联是 回调这个方法
*/
@Override
public void onAttach(Activity activity) {
// TODO Auto-generated method stub
super.onAttach(activity);
//当前fragment从activity重写了回调接口 得到接口的实例化对象
callBackValue =(CallBackValue) getActivity();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment_layout1, container, false);
btn1 = (Button) view.findViewById(R.id.btn1);
et1 = (EditText) view.findViewById(R.id.et1);
btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String strValue = et1.getText().toString().trim();
callBackValue.SendMessageValue(strValue);
}
});
return view;
}
//定义一个回调接口
public interface CallBackValue{
public void SendMessageValue(String strValue);
}
}
Fragment f=new WeatherFragment();
Bundle data=new Bundle();
data.putString("city",cityList.get(index));
f.setArguments(data);
Fragment向activity中传值
1.在Fragment中写一个回调接口
2.在activity中实现这个回调接口
3,在Fragment中onAttach 方法中得到activity中实现好的 实例化接口对象
4,用接口的对象 进行传值
代码:
MainActivity:
[java] view
plain copy
print?
package com.qianfeng.fragmenttoactivity;
import com.qianfeng.fragmenttoactivity.Fragmen1.CallBackValue;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.view.Menu;
import android.widget.TextView;
@SuppressLint("NewApi")
public class MainActivity extends Activity implements CallBackValue{
private TextView tv1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv1 = (TextView) findViewById(R.id.tv1);
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.add(R.id.contents, new Fragmen1());
transaction.commit();
}
//要获取的值 就是这个参数的值
@Override
public void SendMessageValue(String strValue) {
// TODO Auto-generated method stub
tv1.setText(strValue);
}
}
Fragment:
[java] view
plain copy
print?
package com.qianfeng.fragmenttoactivity;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
@SuppressLint("NewApi")
public class Fragmen1 extends Fragment{
private Button btn1;
private EditText et1;
CallBackValue callBackValue;
/**
* fragment与activity产生关联是 回调这个方法
*/
@Override
public void onAttach(Activity activity) {
// TODO Auto-generated method stub
super.onAttach(activity);
//当前fragment从activity重写了回调接口 得到接口的实例化对象
callBackValue =(CallBackValue) getActivity();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment_layout1, container, false);
btn1 = (Button) view.findViewById(R.id.btn1);
et1 = (EditText) view.findViewById(R.id.et1);
btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String strValue = et1.getText().toString().trim();
callBackValue.SendMessageValue(strValue);
}
});
return view;
}
//定义一个回调接口
public interface CallBackValue{
public void SendMessageValue(String strValue);
}
}
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