java - 在两个 Activity 之间传输数据

Question

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Answer 1

在第一个 Activity 中:

Intent i = new Intent(this, ActivityB.class);
i.putExtra("Value1", "1");
startActivityForResult(i, 100);

接收数据如:

Intent receivedIntent = getIntent();
if(receiveIntent!=null){
   String value1 = receiveIntent.getStringExtra("Value1");
}

在一些操作之后在第二个 Activity 中:

Intent returnIntent = new Intent();
returnIntent.putExtra("result",result);
setResult(Activity.RESULT_OK,returnIntent);
finish();

在 FirstActivity 中处理结果:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (requestCode == 100) {
        if(resultCode == Activity.RESULT_OK){
            String result=data.getStringExtra("result");
        }
    }
}