错误：的onCreate（捆绑），在本次活动已经定义 [英] Error : onCreate(Bundle) is already defined in this activity

问题描述

作为新的Andr​​oid应用程序开发我正在努力学习使用连接意向书两项活动。我尝试了code从一本书。它不断抛出一个错误说 - 已经在MainActivity类别还有NewActivity类定义的的onCreate（包）。会有很大的帮助，如果我能得到一个解决方案。

MainActivity.class

 公共类MainActivity延伸活动{    @覆盖
    保护无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.activity_main）;
    }    公共无效的onCreate（捆绑冰柱）{
        super.onCreate（冰柱）;
        的setContentView（R.layout.activity_new）;        查看查看= getWindow（）getDecorView（）findViewById（android.R.id.content）。
        view.setOnClickListener（新View.OnClickListener（）{
            @覆盖
            公共无效的onClick（视图v）{
                意图startIntent =新意图（MainActivity.this，NewActivity.class）;
                startActivity（startIntent）;
            }
        }）;    }
 

NewActivity.class

 公共类NewActivity延伸活动{    @覆盖
    公共无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
    }    公共无效的onCreate（捆绑冰柱）{
        super.onCreate（冰柱）;
        的setContentView（R.layout.activity_new）;
    }
}
 

解决方案

如果你想连接这些活动，你必须这样做：

 公共类MainActivity延伸活动{@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.activity_main）;        查看查看= getWindow（）getDecorView（）findViewById（android.R.id.content）。
    view.setOnClickListener（新View.OnClickListener（）{
        @覆盖
        公共无效的onClick（视图v）{
            意图startIntent =新意图（MainActivity.this，NewActivity.class）;
            startActivity（startIntent）;
        }
    }）;}
 

然后在YOUT次活动只是删除：

 公共无效的onCreate（捆绑冰柱）{
    super.onCreate（冰柱）;
    的setContentView（R.layout.activity_new）;
}
 

和复制这样的：

  @覆盖
保护无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.activity_new）;
}
 

和它的工作。

Being new to Android Application development i was trying to learn connecting two activities using Intent. I tried a code from a book. It keeps throwing an error saying - 'onCreate(Bundle)' is already defined in MainActivity class as well as the NewActivity class. Would be of great help if i could get a solution.

MainActivity.class

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.activity_new);

        View view = getWindow().getDecorView().findViewById(android.R.id.content);
        view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent startIntent = new Intent(MainActivity.this, NewActivity.class);
                startActivity(startIntent);
            }
        });

    }

NewActivity.class

public class NewActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.activity_new);
    }
}

解决方案

If you want to connect those activities you have to do this :

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

        View view = getWindow().getDecorView().findViewById(android.R.id.content);
    view.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent startIntent = new Intent(MainActivity.this, NewActivity.class);
            startActivity(startIntent);
        }
    });

}

And then in yout second activity just delete the:

  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.activity_new);
}

And copy this:

 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_new);
}

And it will work.

这篇关于错误：的onCreate（捆绑），在本次活动已经定义的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！