2018-03-15 Fragment布局(二) ---- 数据传递

笔记如下

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如图:

Video_2018-03-15_145040.gif

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• 输入框是在activity中的,按钮在fragment中
  主要代码
  SoundFragment类

package com.chen.fragment;

import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

/**
 * Created by HP on 2018/3/15.
 */

public class SoundFragment extends Fragment {

    Button btn;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {


        //先将fragment声明layout文件,然后装换为一个view对象
        View view = inflater.inflate(R.layout.soundfragment, null);

        btn = (Button) view.findViewById(R.id.btn);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //获得文本输入框内容,如何获得
                //获得activity对象
                //activity与fragment之间传输数据,用getActivity()可以阿获得当前activity实例
                EditText ed_text = (EditText) getActivity().findViewById(R.id.ed_text);
                String text = ed_text.getText().toString();
                Toast.makeText(getActivity(), text, Toast.LENGTH_SHORT).show();
            }
        });

        return  view;
    }
}