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我的第一次申请和履带
原标题:my first application android
  • 时间:2012-01-14 00:32:47
  •  标签:
  • android

hello i试图在甲状腺中使用简单的应用,但我有许多问题。

i 需要在纽顿案文中点击“h”的改动;

我的主编xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >


    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button" />

</LinearLayout>

我的班子

package com.my.Hello;



import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

public class HelloActivity extends Activity{
    Button button;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        button = (Button)findViewById(R.id.button1);
        button.setText("hh");
        button.setOnClickListener(new View.OnClickListener()
        {
        public void onClick(View v)
        {
            button.setText("hh");
        }
        });

        setContentView(R.layout.main);
    }

    }

i have good resultat in UI but when i click in button not thing happen ?

最佳回答

您将案文改为onCreate(>,这样点击就会改变。

另外,你也两次打电话到<条码>查询(<>tContentView(),因此第二次使你已经编码的所有内容无效。

为此:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

    button = (Button) findViewById(R.id.button1);
    button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            button.setText("hh");
        }
    });
}
问题回答

暂无回答




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