(Android)五分钟学会PopupWindow

转载

mb5fe32930661bd 2021-06-12 17:06:22

文章标签 JAVA 文章分类 Java 后端开发

对于自定义窗口，Android提供了PopupWindow，简单实用。
下面我们来看看：
PopupWindow的构造函数
public PopupWindow(View contentView, int width, int height, boolean focusable)
其中contentView为要显示的view，width和height为宽和高，值为像素值，可以是MATCHT_PARENT和WRAP_CONTENT
来设置，如果focusable为false，在一个Activity弹出一个PopupWindow，按返回键，由于PopupWindow没有焦点，会直接退出Activity。如果focusable为true，PopupWindow弹出后，所有的触屏和物理按键都有PopupWindows处理。
如果PopupWindow中有Editor的话，focusable要为true。

下面来看一个简单的demo

主界面：就简单放一个button,点击弹出我们需要的PopupWindow

[html] view plain copy print ?

<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="@+id/btnOpen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="@string/app_name"/>
</RelativeLayout>

popupwindow 界面：放了2个button 和一个文本框，用来输入值

[html] view plain copy print ?

<?xml version="1.0"encoding="utf-8"?>
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#b5555555">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#eee"
android:orientation="vertical" >
<EditText
android:id="@+id/leaveword"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="20dp"
android:gravity="top"
android:hint="说点什么吧~"
android:inputType="textMultiLine"
android:lineSpacingExtra="6.0dp"
android:maxHeight="150dp"
android:minHeight="100dp"
android:paddingLeft="10.0dp"
android:paddingRight="10.0dp"
android:paddingTop="10.0dp" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
android:gravity="center"
android:orientation="horizontal">
<Button
android:id="@+id/confirmButton"
android:layout_width="80.0dip"
android:layout_height="wrap_content"
android:gravity="center"
android:text="发表"
android:textColor="#fff"
android:textSize="16.0sp" />
<Button
android:id="@+id/cancleButton"
android:layout_width="80.0dip"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:gravity="center"
android:text="取消"
android:textColor="#565656"
android:textSize="16.0sp" />
</LinearLayout>
</LinearLayout>
</RelativeLayout>

效果：

(Android)五分钟学会PopupWindow_JAVA

这样我们的界面就算完成了，下来我们来看一个Activity。写个了OpenView 来弹出view

[java] view plain copy print ?

public void OpenView() {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
popupWindowView = inflater.inflate(R.layout.popupwindow, null);
popupWindow = newPopupWindow(popupWindowView,
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT,true);
// 设置PopupWindow的弹出和消失效果
popupWindow.setAnimationStyle(R.style.popupAnimation);
btnsure = (Button) popupWindowView.findViewById(R.id.confirmButton);
btnsure.setOnClickListener(newButtonOnClickListener());
cancleButton = (Button) popupWindowView.findViewById(R.id.cancleButton);
cancleButton.setOnClickListener(new ButtonOnClickListener());
leaveword = (EditText) popupWindowView.findViewById(R.id.leaveword);
popupWindow.showAtLocation(btnsure, Gravity.CENTER, 0, 0);
}

我们看到弹出来的有点动画效果，是因为我们在弹出时，加上了

[java] view plain copy print ?

popupWindow.setAnimationStyle(R.style.popupAnimation);

需要在styles.xml下加上

[html] view plain copy print ?

<style name="popupAnimation"parent="android:Animation">
<itemname="android:windowEnterAnimation">@anim/in</item>
<itemname="android:windowExitAnimation">@anim/out</item>
lt;/style>

在在工程res下新建anim文件夹，在anim文件夹先新建两个xml文件

in.xml

[html] view plain copy print ?

<?xml version="1.0"encoding="utf-8"?>
<setxmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="1500"
android:fromYDelta="5000"
android:toYDelta="0" />
</set>

out.xml

[html] view plain copy print ?

<?xml version="1.0"encoding="utf-8"?>
<setxmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromYDelta="0"
android:toYDelta="5000"
android:duration="1500"
/>
</set>

如果想要关闭弹出框

调用popupWindow.dismiss();就好

这样一个简单的PopupWindow例子就算完成了

[java] view plain copy print ?

public class MainActivity extendsActivity {
private View popupWindowView;
private PopupWindow popupWindow;
private Button btnsure, cancleButton, btnOpen;
private EditText leaveword;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnOpen = (Button) findViewById(R.id.btnOpen);
btnOpen.setOnClickListener(newButtonOnClickListener());
}
public void OpenView() {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
popupWindowView = inflater.inflate(R.layout.popupwindow, null);
popupWindow = newPopupWindow(popupWindowView,
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT,true);
// 设置PopupWindow的弹出和消失效果
popupWindow.setAnimationStyle(R.style.popupAnimation);
btnsure = (Button) popupWindowView.findViewById(R.id.confirmButton);
btnsure.setOnClickListener(newButtonOnClickListener());
cancleButton = (Button) popupWindowView.findViewById(R.id.cancleButton);
cancleButton.setOnClickListener(new ButtonOnClickListener());
leaveword = (EditText) popupWindowView.findViewById(R.id.leaveword);
popupWindow.showAtLocation(btnsure, Gravity.CENTER, 0, 0);
}
private classButtonOnClickListenerimplements OnClickListener {
@Override
public void onClick(View vid) {
switch (vid.getId()) {
case R.id.btnOpen:
OpenView();
break;
case R.id.confirmButton:
Toast.makeText(MainActivity.this, leaveword.getText().toString(), Toast.LENGTH_SHORT)
.show();
break;
case R.id.cancleButton:
popupWindow.dismiss();
break;
default:
break;
}
}
}
}