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3-AVI--Activity与Fragment的数据传递

日期:2018-08-27点击:312

零、前言

[1].Activity向Fragment传数据
[2].Fragment向Activity传数据
[3].Fragment向Fragment传数据

一、Activity向Fragment传数据效果:

ac2fg.gif
1.Ac2FgActivity.java
public class Ac2FgActivity extends AppCompatActivity { @BindView(R.id.tv_data_content) EditText mTvDataContent; @BindView(R.id.btn_send_data) Button mBtnSendData; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_ac2fg); ButterKnife.bind(this); initFragment(); } private void initFragment() { FragmentManager fm = getFragmentManager();//1.获取FragmentManager FragmentTransaction ft = fm.beginTransaction();//2.fm开启事务 //3.动态添加 (控件id,fragment对象,tag) ft.add(R.id.fl_fragmemt_content, new ResultFragment()); ft.commit();//4.提交事务 } @OnClick(R.id.btn_send_data) public void onViewClicked() { String result = mTvDataContent.getText().toString().trim();//获取输入结果 ResultFragment rfg = new ResultFragment();//创建ResultFragment对象 Bundle bundle = new Bundle();//创建Bundle对象 bundle.putString("data", result);//为bundle赋值 rfg.setArguments(bundle);//为ResultFragment设置Arguments FragmentTransaction ft = getFragmentManager().beginTransaction(); ft.replace(R.id.fl_fragmemt_content, rfg);//替换之前的 ft.commit(); } } 
2.activity_ac2fg.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <EditText android:id="@+id/tv_data_content" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="I'm Activity:请输入传入fragment的信息"/> <Button android:id="@+id/btn_send_data" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/tv_data_content" android:layout_centerHorizontal="true" android:text="点击传值"/> <FrameLayout android:id="@+id/fl_fragmemt_content" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/btn_send_data"> </FrameLayout> </RelativeLayout> 
3.ResultFragment.java
public class ResultFragment extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_content, container, false); TextView f_tv_content = view.findViewById(R.id.f_tv_content); Bundle bundle = getArguments(); if (bundle != null) { String reslut = bundle.getString("data"); f_tv_content.setText(reslut); } return view; } } 
4.fragment_content.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/f_tv_content" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_centerInParent="true" android:background="#D5DBDD" android:text="I'm Fragment" android:textSize="24dp"/> </RelativeLayout> 
Activity向Fragment传数据.png


二、Fragment向Activity传数据效果:

fg2ac.gif
1.Fg2AcActivity.java
public class Fg2AcActivity extends AppCompatActivity{ @BindView(R.id.activity_tv_content) TextView mActivityTvContent; @BindView(R.id.fl_fragmemt_send) FrameLayout mFlFragmemtSend; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_fg2ac); ButterKnife.bind(this); initFragment(); } private void initFragment() { FragmentManager fm = getFragmentManager();//1.获取FragmentManager FragmentTransaction ft = fm.beginTransaction();//2.fm开启事务 //3.动态添加 (控件id,fragment对象,tag) ft.add(R.id.fl_fragmemt_send, new SendFragment()); ft.commit();//4.提交事务 } /** * 设置数据方法 * @param str */ public void setDate(String str) { if (str != null && !"".equals(str)) { mActivityTvContent.setText(str); } } } 
2.activity_fg2ac.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <TextView android:id="@+id/activity_tv_content" android:layout_width="wrap_content" android:layout_height="100dp" android:text="I'm Activity:" android:textSize="24dp"/> <FrameLayout android:id="@+id/fl_fragmemt_send" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/activity_tv_content"> </FrameLayout> </RelativeLayout> 
3.SendFragment.java
public class SendFragment extends Fragment { private EditText tv_data_content; private Button btn_send_data; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_send, container, false); //可实现控件事件 tv_data_content = view.findViewById(R.id.tv_data_content); btn_send_data = view.findViewById(R.id.btn_send_data); btn_send_data.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String result = tv_data_content.getText().toString().trim(); ((Fg2AcActivity)getActivity()).setDate(result); } }); return view; } } 

4.fragment_send

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:background="@color/qq_line" android:layout_height="match_parent"> <EditText android:id="@+id/tv_data_content" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="I'm Fragment:请输入传入Activity的信息"/> <Button android:id="@+id/btn_send_data" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/tv_data_content" android:layout_centerHorizontal="true" android:text="点击传值"/> </RelativeLayout> 
Fragment向Activity传数据.png


三、Fragment向Fragment传数据据效果:

fg2fg.gif
1.Fg2FgActivity.java
public class Fg2FgActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_fg2fg); initFragment(); } private void initFragment() { FragmentManager fm = getFragmentManager();//1.获取FragmentManager FragmentTransaction ft = fm.beginTransaction();//2.fm开启事务 //3.动态添加 (控件id,fragment对象,tag) ft.add(R.id.f_left, new LeftFragment()); ft.add(R.id.f_right, new RightFragment()); ft.commit();//4.提交事务 } } 
2.activity_fg2fg.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal"> <FrameLayout android:id="@+id/f_left" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1"> </FrameLayout> <FrameLayout android:id="@+id/f_right" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1"> </FrameLayout> </LinearLayout> 
3.LeftFragment.java
public class LeftFragment extends Fragment { EditText mTvDataContent; Button mBtnSendData; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_left, container, false); mTvDataContent = view.findViewById(R.id.tv_data_content); mBtnSendData = view.findViewById(R.id.btn_send_data); mBtnSendData.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String str = mTvDataContent.getText().toString().trim(); TextView mtv = getActivity().findViewById(R.id.right_content); mtv.setText(str); } }); return view; } } 
4.fragment_left.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <EditText android:id="@+id/tv_data_content" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="I'm left fragment"/> <Button android:id="@+id/btn_send_data" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/tv_data_content" android:layout_centerHorizontal="true" android:text="点击传值"/> </LinearLayout> 
5.RightFragment.java
public class RightFragment extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_right, container, false); return view; } } 
6.fragment_right.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#eee" android:orientation="vertical"> <TextView android:id="@+id/right_content" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="I'm right fragment"/> </LinearLayout> 

后记、

1.声明:

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