利用活动显示对话框，需要重写Activity中的onCreateDialog（）方法，以此来显示一个对话框窗口。
效果如下：
实现代码如下：
package com.example.dialog; import java.util.zip.CheckedInputStream; import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast; public class DialogActivity extends Activity { CharSequence[] items = {"美女","世界美女","绝食美女"};
boolean[] itemsChecked = new boolean[items.length];
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
} public void onClick(View v){
showDialog(0);
}
@Override
@Deprecated
protected Dialog onCreateDialog(int id) {
// TODO Auto-generated method stub
switch (id) {
case 0:
Builder builder = new AlertDialog.Builder(this);
builder.setIcon(R.drawable.ic_launcher);
builder.setTitle("This is a dialog with some text");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() { @Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(getBaseContext(), "OK clicked!", Toast.LENGTH_SHORT).show();
}
}
);
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { @Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(getBaseContext(), "Cancel clicked!", Toast.LENGTH_SHORT).show();
}
}
);
builder.setMultiChoiceItems(items, itemsChecked, new DialogInterface.OnMultiChoiceClickListener() { @Override
public void onClick(DialogInterface Dialog, int which, boolean isChecked) {
// TODO Auto-generated method stub
Toast.makeText(getBaseContext(),
items[which] + (isChecked ? " Checked!":" Unchecked!" ),
Toast.LENGTH_SHORT).show();
}
}
);
return builder.create(); }
return null; }
public void onClick2(View v){
final ProgressDialog progressDialog =ProgressDialog.show(this, "progressbar", "please waiting...");
new Thread(new Runnable() { @Override
public void run() {
// TODO Auto-generated method stub
try {
Thread.sleep(3000);
progressDialog.dismiss();
} catch (InterruptedException e) {
// TODO: handle exception
e.printStackTrace();
}
}
}).start();
}
}