将活动 B 的字符串发送到活动 A 的片段 F [英] Send string from an activity B to a fragment F of activity A

问题描述

我有两个活动(A 和 B)，我的片段 F 包含在活动 A 中.我想将字符串从活动 B 发送到片段 F.我该怎么做?这是我的代码:

I have two activities (A & B) and my fragment F is contained in the activity A. I'd like to send strings from activity B to fragment F. How can I do that? Here's my code:

活动 B

public final static String EXTRA_MESSAGE = "com.sample.MESSAGE";

// onClick get button from activity B layout
public void get(View view) {
    Intent intent = new Intent(this, ActivityA.class);
    TextView textView = (TextView)findViewById(R.id.coordinates);
    String message = textView.getText().toString();
    intent.putExtra(EXTRA_MESSAGE, message);
    startActivity(intent);
}

片段 F

EditText editText;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    String num = getActivity().getIntent().getStringExtra("EXTRA_MESSAGE");

    View v = inflater.inflate(R.layout.tab1, container, false);

    // EditText from fragment F layout
    editText = (EditText) v.findViewById(R.id.edit_coordinates);    
    editText.setText(num);
    return v;
}

当我在我的设备上运行它时我没有收到任何错误，但我没有将字符串发送到我的 EditText

I don't get any errors when i run it on my device but I'm not getting the strings to my EditText

推荐答案

你应该在片段中用 "com.sample.MESSAGE" 替换 "EXTRA_MESSAGE"

You should replace "EXTRA_MESSAGE" with "com.sample.MESSAGE" in fragment

所以替换

 String num = getActivity().getIntent().getStringExtra("EXTRA_MESSAGE");// OR Double quotes

与

String num = getActivity().getIntent().getStringExtra("com.sample.MESSAGE");

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