package com.jj.popupwindow;
import android.app.Activity;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupWindow;
/***
* PopupWindow
*
* @author zhangjia
*
*/
public class MainActivity extends Activity {
private Button button;
private PopupWindow popupWindow;
private LinearLayout layout;
private ListView listView;
private String title[] = { "全部", "我的微博", "周边", "智能排版", "同学" };
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
button = (Button) findViewById(R.id.tv_title);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
button.getTop();
int y = button.getBottom() * 3 / 2;
int x = getWindowManager().getDefaultDisplay().getWidth() / 4;
showPopupWindow(x, y);
}
});
}
public void showPopupWindow(int x, int y) {
layout = (LinearLayout) LayoutInflater.from(MainActivity.this).inflate(
R.layout.dialog, null);
listView = (ListView) layout.findViewById(R.id.lv_dialog);
listView.setAdapter(new ArrayAdapter<String>(MainActivity.this,
R.layout.text, R.id.tv_text, title));
popupWindow = new PopupWindow(MainActivity.this);
popupWindow.setBackgroundDrawable(new BitmapDrawable());
popupWindow
.setWidth(getWindowManager().getDefaultDisplay().getWidth() / 2);
popupWindow.setHeight(300);
popupWindow.setOutsideTouchable(true);
popupWindow.setFocusable(true);
popupWindow.setContentView(layout);
// showAsDropDown会把里面的view作为参照物，所以要那满屏幕parent
// popupWindow.showAsDropDown(findViewById(R.id.tv_title), x, 10);
popupWindow.showAtLocation(findViewById(R.id.main), Gravity.LEFT
| Gravity.TOP, x, y);//需要指定Gravity，默认情况是center.
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
button.setText(title[arg2]);
popupWindow.dismiss();
popupWindow = null;
}
});
}
}
