java 在ClickListener上找不到符号类
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Cannot find symbol class onClickListener
提问by Veeresh
I'm new to android development. Here's the problem i ran into. I'm using Android Studio. I looked up on many sites, they said to import the related class. Having done that, the problem remains. Any help is appreciated.
我是安卓开发的新手。这是我遇到的问题。我正在使用 Android Studio。我查了很多网站，他们说要导入相关的类。这样做之后，问题仍然存在。任何帮助表示赞赏。
Can anyone please help me with this, i have been searching for a while now for the solution.
任何人都可以帮我解决这个问题，我一直在寻找解决方案。
Here's the code:
这是代码：
package com.example.veeresh.myapplication;
//import statements
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button1 = (Button)findViewById(R.id.button1);
button1.setOnClickListener(
//error: cannot find symbol class onClickListener
new Button.onClickListener()
{
public void onClick(View v)
{
TextView text1 = (TextView)findViewById(R.id.text1);
text1.setText("Veeresh Here");
}
}
);
}
}
Error:
错误：
Error:(24, 27) error: cannot find symbol class onClickListener
Error:Execution failed for task ':app:compileDebugJava'.
Compilation failed; see the compiler error output for details.
错误：(24, 27) 错误：找不到符号类 onClickListener
错误：任务 ':app:compileDebugJava' 的执行失败。
编译失败；有关详细信息，请参阅编译器错误输出。
回答by sonic
It should be new View.OnClickListener()instead of new Button.onClickListener()
它应该new View.OnClickListener()代替new Button.onClickListener()
OnClickListenerwith a capital O.
OnClickListener大写O。
回答by Sachin
Edit your code like this
像这样编辑你的代码
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button1 = (Button)findViewById(R.id.button1);
TextView text1 = (TextView)findViewById(R.id.text1);
button1.setOnClickListener(new View.onClickListener()
{
public void onClick(View v)
{
text1.setText("Veeresh Here");
}
}
);
回答by saikrupa
update your code with the below code
使用以下代码更新您的代码
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity implements android.view.View.OnClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button1 = (Button)findViewById(R.id.button1);
button1.setOnClickListener(this);
}
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
TextView text1 = (TextView)findViewById(R.id.text1);
text1.setText("Veeresh Here");
}
}
回答by Erfan GLMPR
Both Button.OnClickListener()and View.OnClickListener()works fine it is just the capital Othat you are missing.
双方 Button.OnClickListener()并View.OnClickListener()工作正常，这只是资本Ø您缺少。
