我的android项目有问题。我无法访问我的按钮。我附上了我的班级代码==http://pastebin.com/A5ZTBkhd.请任何人帮帮我。这是我的代码-包com.droid.androiddoctor;
import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.TextView;
public class AndroidDoctorMainActivity extends Activity implements OnClickListener{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_android_doctor_main);
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_android_doctor_main, menu);
return true;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId())
{
case R.id.btnSubmit:
String e="hello";
String error = e.toString();
Dialog d = new Dialog(this);
d.setTitle("Dang it!");
TextView tv = new TextView(this);
tv.setText(error);
d.setContentView(tv);
d.show();
break;
}
}
}
。这是我的代码。当我推送提交时,什么也没发生。xml文件为====
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/btnSubmit"
androi:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Submit" />
<Button
android:id="@+id/btnExit"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Exit" />
</LinearLayout>
您根本没有为小部件设置侦听器。试试这个:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_android_doctor_main);
Button button1 = (Button) findViewById(R.id.btnSubmit);
button1.setOnClickListener(this)
}
我建议你浏览一下安卓的用户界面指南。
我不会那样实现OnClickListener,试着在你的类中这样添加它:
public class AndroidDoctorMainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_android_doctor_main);
Button button1 = (Button) findViewById(R.id.btnSubmit);
Button button2 = (Button) findViewById(R.id.btnExit);
button1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//your code for click on this button
}});
button2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//your code for this button
//or if you just want to exit from activity, just call:
finish();
}});
@Override
public boolean onCreateOptionsMenu(Menu menu) {
}
}