Dialog的使用一

public class DialogActivity extends Activity  implements OnClickListener{

 private Button dialog = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dialog);
        dialog = (Button)this.findViewById(R.id.dialog);
        dialog.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
     // TODO Auto-generated method stub
     responseDialog();
    }
   
    public void responseDialog(){
     AlertDialog.Builder builder = new Builder(DialogActivity.this);
     builder.setTitle("提示");
     builder.setMessage("确认退出吗?");
     builder.setPositiveButton("确认",new DialogInterface.OnClickListener() { 
   @Override
   public void onClick(DialogInterface dialog, int which) {
    // TODO Auto-generated method stub
    dialog.dismiss();
    DialogActivity.this.finish();
   }
  });
     builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
   
   @Override
   public void onClick(DialogInterface dialog, int which) {
    // TODO Auto-generated method stub
    dialog.dismiss();
   }
  });
     
     builder.create().show();

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.dialog, menu);
        return true;
    }
   
}

 

 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <Button
        android:id="@+id/dialog"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
      android:text="@string/dialog"
        />
   
</LinearLayout>