問題描述

我正在嘗試設置和 onclicklistener，以便當我在 edittext 元素中單擊時，它將清除其當前內容.這里有什么問題嗎?當我編譯這段代碼時，我得到一個強制退出和 ActivityManager: Can't dispatch DDM chunk 4d505251: no handler defined 錯誤.

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("");
    }
}

推薦答案

首先你需要調用 setContentView(R.layout.main) 然后所有其他的初始化.

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

請嘗試以下代碼.

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) {
        editText.getText().clear(); //or you can use editText.setText("");
    }
}

這篇關于輸入時清除 EditText 中的文本的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！