3-AVI–Activity與Fragment的資料傳遞

張風捷特烈發表於2018-08-28
Fragment

零、前言

[1].Activity向Fragment傳資料
[2].Fragment向Activity傳資料
[3].Fragment向Fragment傳資料

一、Activity向Fragment傳資料效果：

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.獲取FragmentManager
        FragmentTransaction ft = fm.beginTransaction();//2.fm開啟事務
        //3.動態新增 （控制元件id,fragment物件，tag）
        ft.add(R.id.fl_fragmemt_content, new ResultFragment());
        ft.commit();//4.提交事務
    }

    @OnClick(R.id.btn_send_data)
    public void onViewClicked() {

        String result = mTvDataContent.getText().toString().trim();//獲取輸入結果
        ResultFragment rfg = new ResultFragment();//建立ResultFragment物件
        Bundle bundle = new Bundle();//建立Bundle物件
        bundle.putString("data", result);//為bundle賦值
        rfg.setArguments(bundle);//為ResultFragment設定Arguments
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        ft.replace(R.id.fl_fragmemt_content, rfg);//替換之前的
        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:請輸入傳入fragment的資訊"/>

    <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="點選傳值"/>

    <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傳資料.png

二、Fragment向Activity傳資料效果：

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.獲取FragmentManager
        FragmentTransaction ft = fm.beginTransaction();//2.fm開啟事務
        //3.動態新增 （控制元件id,fragment物件，tag）
        ft.add(R.id.fl_fragmemt_send, new SendFragment());
        ft.commit();//4.提交事務
    }

    /**
     * 設定資料方法
     * @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);
        //可實現控制元件事件
        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:請輸入傳入Activity的資訊"/>

    <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="點選傳值"/>

</RelativeLayout>
Fragment向Activity傳資料.png

三、Fragment向Fragment傳資料據效果：

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.獲取FragmentManager
        FragmentTransaction ft = fm.beginTransaction();//2.fm開啟事務
        //3.動態新增 （控制元件id,fragment物件，tag）
        ft.add(R.id.f_left, new LeftFragment());
        ft.add(R.id.f_right, new RightFragment());
        ft.commit();//4.提交事務
    }
}
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="點選傳值"/>
</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>

後記、

1.宣告：

[1]本文由張風捷特烈原創,轉載請註明
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