如何在Android中创建弹出窗口(PopupWindow)

Question

要创建一个简单的工作PopupWindow,我们需要执行以下操作:

popup_example.xml:

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
        android:padding="10dip"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">

        <TextView         
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dip"
            android:text="Test Pop-Up" />

    </LinearLayout>

Java代码

LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

PopupWindow pw = new PopupWindow(inflater.inflate(R.layout.popup_example, null, false),100,100, true);

pw.showAtLocation(this.findViewById(R.id.main), Gravity.CENTER, 0, 0);

我的要求是我需要一个

<TEXTVIEW android:layout_height="wrap_content" android:layout_width="fill_parent" />

和a

<BUTTON android:id="@+id/end_data_send_button" android:text="Cancel"/>

在我的popup_example.xml.如何在Java代码中处理这两个组件？

Answer 1

在这里,我给你一个演示示例.看到这个并根据您的需要进行定制.

public class ShowPopUp extends Activity {

     PopupWindow popUp;
     LinearLayout layout;
     TextView tv;
     LayoutParams params;
     LinearLayout mainLayout;
     Button but;
     boolean click = true;

     @Override
     public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      popUp = new PopupWindow(this);
      layout = new LinearLayout(this);
      mainLayout = new LinearLayout(this);
      tv = new TextView(this);
      but = new Button(this);
      but.setText("Click Me");
      but.setOnClickListener(new OnClickListener() {

       public void onClick(View v) {
        if (click) {
         popUp.showAtLocation(layout, Gravity.BOTTOM, 10, 10);
         popUp.update(50, 50, 300, 80);
         click = false;
        } else {
         popUp.dismiss();
         click = true;
        }
       }

      });
      params = new LayoutParams(LayoutParams.WRAP_CONTENT,
        LayoutParams.WRAP_CONTENT);
      layout.setOrientation(LinearLayout.VERTICAL);
      tv.setText("Hi this is a sample text for popup window");
      layout.addView(tv, params);
      popUp.setContentView(layout);
      // popUp.showAtLocation(layout, Gravity.BOTTOM, 10, 10);
      mainLayout.addView(but, params);
      setContentView(mainLayout);
     }
    }

希望这能解决您的问题.

Answer 2

如何制作一个简单的Android弹出窗口

这是一个更全面的例子.这是一个补充答案,一般涉及创建弹出窗口,而不一定是OP问题的具体细节.(OP要求取消按钮,但这不是必需的,因为用户可以单击屏幕上的任意位置取消它.)它将如下图所示.

为弹出窗口制作布局

添加一个布局文件来res/layout定义弹出窗口的外观.

popup_window.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="#62def8">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:layout_margin="30dp"
        android:textSize="22sp"
        android:text="This is a popup window."/>

</RelativeLayout>

膨胀并显示弹出窗口

这是我们示例的主要活动的代码.只要单击该按钮,弹出窗口就会膨胀并显示在活动上.触摸屏幕上的任何位置都会取消弹出窗口.

MainActivity.java

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void onButtonShowPopupWindowClick(View view) {

        // inflate the layout of the popup window
        LayoutInflater inflater = (LayoutInflater)
                getSystemService(LAYOUT_INFLATER_SERVICE);
        View popupView = inflater.inflate(R.layout.popup_window, null);

        // create the popup window
        int width = LinearLayout.LayoutParams.WRAP_CONTENT;
        int height = LinearLayout.LayoutParams.WRAP_CONTENT;
        boolean focusable = true; // lets taps outside the popup also dismiss it
        final PopupWindow popupWindow = new PopupWindow(popupView, width, height, focusable);

        // show the popup window
        // which view you pass in doesn't matter, it is only used for the window tolken
        popupWindow.showAtLocation(view, Gravity.CENTER, 0, 0);

        // dismiss the popup window when touched
        popupView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                popupWindow.dismiss();
                return true;
            }
        });
    }
}

而已.你结束了.

继续

查看重力值如何影响PopupWindow.

您还可以添加阴影.

进一步研究

这些也有助于学习如何制作弹出窗口:

• PopupWindow文档
• 如何在Android中创建弹出窗口(YouTube视频)
• Android弹出窗口示例

Answer 3

你完成了布局膨胀吗？也许你可以尝试这个!!

View myPoppyView = pw.getContentView();
Button myBelovedButton = (Button)myPoppyView.findViewById(R.id.my_beloved_button);
//do something with my beloved button? :p

Answer 4

我构建自己的类,然后从我的活动中调用它,覆盖showAtLocation等小方法.当我在我的活动中有4到5个弹出窗口时,我发现它更容易.

public class ToggleValues implements OnClickListener{

    private View pView;
    private LayoutInflater inflater;
    private PopupWindow pop;
    private Button one, two, three, four, five, six, seven, eight, nine, blank;
    private ImageButton eraser;
    private int selected = 1;
    private Animation appear;

    public ToggleValues(int id, Context c, int screenHeight){
        inflater = (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        pop = new PopupWindow(inflater.inflate(id, null, false), 265, (int)(screenHeight * 0.45), true);
        pop.setBackgroundDrawable(c.getResources().getDrawable(R.drawable.alpha_0));
        pView = pop.getContentView();

        appear = AnimationUtils.loadAnimation(c, R.anim.appear);

        one = (Button) pView.findViewById(R.id.one);
        one.setOnClickListener(this);
        two = (Button) pView.findViewById(R.id.two);
        two.setOnClickListener(this);
        three = (Button) pView.findViewById(R.id.three);
        three.setOnClickListener(this);
        four = (Button) pView.findViewById(R.id.four);
        four.setOnClickListener(this);
        five = (Button) pView.findViewById(R.id.five);
        five.setOnClickListener(this);
        six = (Button) pView.findViewById(R.id.six);
        six.setOnClickListener(this);
        seven = (Button) pView.findViewById(R.id.seven);
        seven.setOnClickListener(this);
        eight = (Button) pView.findViewById(R.id.eight);
        eight.setOnClickListener(this);
        nine = (Button) pView.findViewById(R.id.nine);
        nine.setOnClickListener(this);
        blank = (Button) pView.findViewById(R.id.blank_Selection);
        blank.setOnClickListener(this);
        eraser = (ImageButton) pView.findViewById(R.id.eraser);
        eraser.setOnClickListener(this);
    }

    public void showAtLocation(View v) {
        pop.showAtLocation(v, Gravity.BOTTOM | Gravity.LEFT, 40, 40);
        pView.startAnimation(appear);
    }

    public void dismiss(){ 
        pop.dismiss();
    }

    public boolean isShowing() {
        if(pop.isShowing()){
            return true;
        }else{
            return false;
        }
    }

    public int getSelected(){
        return selected;
    }

    public void onClick(View arg0) {
        if(arg0 == one){
            Sudo.setToggleNum(1);
        }else if(arg0 == two){
            Sudo.setToggleNum(2);
        }else if(arg0 == three){
            Sudo.setToggleNum(3);
        }else if(arg0 == four){
            Sudo.setToggleNum(4);
        }else if(arg0 == five){
            Sudo.setToggleNum(5);
        }else if(arg0 == six){
            Sudo.setToggleNum(6);
        }else if(arg0 == seven){
            Sudo.setToggleNum(7);
        }else if(arg0 == eight){
            Sudo.setToggleNum(8);
        }else if(arg0 == nine){
            Sudo.setToggleNum(9);
        }else if(arg0 == blank){
            Sudo.setToggleNum(0);
        }else if(arg0 == eraser){
            Sudo.setToggleNum(-1);
        }
        this.dismiss();
    }

}

Answer 5

LayoutInflater inflater = (LayoutInflater) SettingActivity.this.getSystemService(SettingActivity.LAYOUT_INFLATER_SERVICE); 
PopupWindow pw = new PopupWindow(inflater.inflate(R.layout.gd_quick_action_slide_fontsize, null),LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT, true);
pw.showAtLocation(SettingActivity.this.findViewById(R.id.setting_fontsize), Gravity.CENTER, 0, 0);
View v= pw.getContentView();
TextView tv=v.findViewById(R.id.....);