我想设置和onclicklistener，这样，当我点击的EditText元素中，将清除其当前内容。是不是有什么错在这里？当我编译这个code，我收到了强制退出和ActivityManager：无法调度DDM块4d505251：没有明确的处理程序错误

 公共类项目扩展了活动实现OnClickListener {
    / **第一次创建活动时调用。 * /
    EditText上EDITTEXT =（EditText上）findViewById（R.id.editText1）;
    @覆盖
    公共无效的onCreate（包savedInstanceState）{
        super.onCreate（savedInstanceState）;


        editText.setOnClickListener（本）;

        的setContentView（R.layout.main）;

    }

    @覆盖
    公共无效的onClick（视图v）{
        // TODO自动生成方法存根
        editText.setText（）;
    }
}
 

解决方案

首先，你需要调用的setContentView（R.layout.main），那么所有其他的初始化。

请尝试以下code。

 公共类Trackfolio扩展活动实现OnClickListener {
/ **第一次创建活动时调用。 * /
公众的EditText EDITTEXT;
@覆盖
公共无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;

    的setContentView（R.layout.main）;
    EDITTEXT =（EditText上）findViewById（R.id.editText1）;

    editText.setOnClickListener（本）;

}

@覆盖
公共无效的onClick（视图v）{
    // TODO自动生成方法存根
    editText.setText（）;
}
 

}

I'm trying to set and onclicklistener so that when I click within the edittext element it will clear its current contents. Is there something wrong here? When I compile this code I get a force quit and ActivityManager: Can't dispatch DDM chunk 4d505251: no handler defined error.

public class Project extends Activity implements OnClickListener {
    /** Called when the activity is first created. */
    EditText editText = (EditText)findViewById(R.id.editText1);
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        editText.setOnClickListener(this);

        setContentView(R.layout.main);

    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        editText.setText("");
    }
}

First you need to call setContentView(R.layout.main) then all other initialization ..

Please try below Code .

public class Trackfolio extends Activity implements OnClickListener {
/** Called when the activity is first created. */
public EditText editText;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);
    editText = (EditText)findViewById(R.id.editText1);

    editText.setOnClickListener(this);

}

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub
    editText.setText("");
}

}