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popupwindow的使用

public class PopUpActivity extends Activity { /** Called when the activity is fi...

public class PopUpActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
        LayoutInflater inflater = LayoutInflater.from(this); 
        // 引入窗口配置文件 
        View view = inflater.inflate(R.layout.main2, null); 
        // 创建PopupWindow对象 
        final PopupWindow pop = new PopupWindow(view, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, false); 
        Button btn = (Button) findViewById(R.id.btn); 
        // 需要设置一下此参数,点击外边可消失 
        pop.setBackgroundDrawable(new BitmapDrawable()); 
        //设置点击窗口外边窗口消失 
        pop.setOutsideTouchable(true); 
        // 设置此参数获得焦点,否则无法点击 
        pop.setFocusable(true); 
        btn.setOnClickListener(new OnClickListener() { 
               
            @Override 
            public void onClick(View v) { 
                if(pop.isShowing()) { 
                    // 隐藏窗口,如果设置了点击窗口外小时即不需要此方式隐藏 
                    pop.dismiss(); 
                } else { 
                    // 显示窗口 
                    pop.showAsDropDown(v); 
                } 
                   
            } 
        }); 
    } 
}