将参数传递给意图 android [英] Passing arguments to intent android

问题描述

我有第一个意图，它开始了第二个意图.在第二个意图中，我获取值，并将值传递给第一个内容并关闭第二个内容.我该怎么做?

I have the first intent, it starts the second intent. In the second intent, I get the values, and pass the value to the first content and close the second content. How can I do it?

推荐答案

您可以在创建意图时直接将参数传递给它.如果需要传递对象，则需要在传递的对象上实现 Parcelable 接口:

You can directly pass parameters to the intent when you create it. If you need to pass objects you need to implement Parcelable interface on the object you pass:

Intent i = new Intent(MyActivity.this, SecondActivity.class);
MyData j = new MyData();
i.putExtra("MyParameter", "Something");
i.putExtra("MyData", j); //only works if MyData implements Parcelable
startActivity(i);

在第二个活动中，您可以读取数据:

In the second activity you can read your data:

Intent i = getIntent();
Bundle extras = i.getExtras();
if(extras.containsKey("MyParameter")) {
    String something = i.getStringExtra("MyParameter");
}
if(extras.containsKey("MyData")) {
    MyData otherthing = i.getParcelableExtra("MyData");
}

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