Android基础(四) 常用控件的事件处理

package enleo.viewsTest;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.RadioGroup;
import android.widget.Toast;
import android.widget.ToggleButton;
import android.widget.RadioGroup.OnCheckedChangeListener;
public class viewsTest extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.basicviews);
//---Button view---
Button btnOpen = (Button) findViewById(R.id.btnOpen);
btnOpen.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Toast.makeText(getBaseContext(),
"You have clicked the Open button",
Toast.LENGTH_SHORT).show();
}
});

Button btnSave = (Button) findViewById(R.id.btnSave);
btnSave.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v) {
DisplayToast("You have clicked the Save button");
}
});

//---CheckBox---
CheckBox checkBox = (CheckBox) findViewById(R.id.chkAutosave);
checkBox.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v) {
if (((CheckBox)v).isChecked())
DisplayToast("CheckBox is checked");
else
DisplayToast("CheckBox is unchecked");
}
});

//---RadioButton---
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.rdbGp1);
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(RadioGroup group, int checkedId) {
//---displays the ID of the RadioButton that is checked---
DisplayToast(Integer.toString(checkedId));
}
});

//---ToggleButton---
ToggleButton toggleButton = (ToggleButton) findViewById(R.id.toggle1);
toggleButton.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v) {
if (((ToggleButton)v).isChecked())
DisplayToast("Toggle button is On");
else
DisplayToast("Toggle button is Off");
}
});
}

private void DisplayToast(String msg)
{
Toast.makeText(getBaseContext(), msg,
Toast.LENGTH_SHORT).show();
}
}