Android PopupWindow使用实例

示例效果如下：

MainActivity.xml

package sn.qdj.popupwindowdemo;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.PopupWindow;

public class MainActivity extends ActionBarActivity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    View root = getLayoutInflater().inflate(R.layout.popup, null);
    
    final PopupWindow popup = new PopupWindow(root, 400,200);
    Button btn = (Button)findViewById(R.id.btn);
    Button close = (Button)findViewById(R.id.close);
    btn.setonClickListener(new onClickListener() {
  @Override
  public void onClick(View v) {
  // TODO Auto-generated method stub
  
  popup.showAtLocation(findViewById(R.id.btn), Gravity.BOTTOM, 0, 0);
  }
 });
    close.setonClickListener(new onClickListener() {
  @Override
  public void onClick(View v) {
  // TODO Auto-generated method stub
  
  popup.dismiss();
  }
 });
  }
}

activity_main.xml

popup.xml