使用意图和捆绑在Android的整数 [英] Using intent and bundle for integers in Android

问题描述

说我想从一个活动/班将数据传递到另一个涉及整数数据类型。下面是我对在MainActivity（第一）班至今：

  @覆盖
公共无效的onClick（视图v）{
    意图I =新意图（这一点，SecondActivity.class）;
    最终诠释X = 3;
    i.putExtra（新变量，X）;
    startActivity（ⅰ）;
}
 

有关接收类，SecondActivity：

 保护无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.activity_second）;    捆绑I = getIntent（）getExtras（）。
    字符串值= i.getString（新变量）;
    tvResult =（的TextView）findViewById（R.id.textViewResult）;
    tvResult.setText（值）;
}
 

不过，SecondActivity显示了没有第二个屏幕上......这或许是因为我需要的价值转换为int第一？

谢谢！

解决方案

  

我想从一个活动传递数据/类其他涉及
  整数数据类型...

X 是 INT 但 SecondActivity i.getString 被用来从捆绑这回字符串数据而不是INT。

使用 Bundle.getInt 获得 INT 从捆绑。

  int值= i.getInt（新变量）;
 

另外在的TextView 将String.valueOf 用于显示 INT C>为：

  tvResult.setText（将String.valueOf（值））;
 

Say I wanted to pass data from one activity/class to the other involving an integer data type. Here's what I have for the MainActivity (first) class so far:

@Override
public void onClick(View v) {
    Intent i = new Intent(this, SecondActivity.class);
    final int x = 3;
    i.putExtra("new variable", x);
    startActivity(i);
}

For the receiving class, SecondActivity:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second);

    Bundle i = getIntent().getExtras();
    String value = i.getString("new variable");
    tvResult = (TextView)findViewById(R.id.textViewResult);
    tvResult.setText(value);
}

However, SecondActivity shows up with nothing on the second screen... Could it perhaps be because I need to convert value to an int first?

Thanks!

解决方案

I wanted to pass data from one activity/class to the other involving an integer data type...

x is int but in SecondActivity i.getString is used to get data from Bundle which return String instead of int.

Use Bundle.getInt to get int from Bundle.

int value = i.getInt("new variable");

Also use String.valueOf for showing int in TextView as:

tvResult.setText(String.valueOf(value));

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