于自定義窗口，Android提供了PopupWindow，簡單實用。
下面我們來看看今天demo實現的效果：
彈出PopupWindow
PopupWindow的構造函數
public PopupWindow(View contentView, int width, int height, boolean focusable)
其中contentView為要顯示的view，width和height為寬和高，
值為像素值，可以是MATCHT_PARENT和WRAP_CONTENT
來設置，如果focusable為false，在一個Activity彈出一個PopupWindow，按返回鍵，由于PopupWindow沒有焦點，會直接退出Activity。如果focusable為true，PopupWindow彈出后，所有的觸屏和物理按鍵都有PopupWindows處理。
如果PopupWindow中有Editor的話，focusable要為true。
下面來看一個簡單的demo
主界面：就簡單放一個button,點擊彈出我們需要的PopupWindow
<RelativeLayout xmlns: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個button 和一個文本框，用來輸入值
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns: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="說點什么吧~"
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="發表"
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>
這樣我們的界面布局就算完成了，下來我們來看一個Activity。寫個了OpenView方法來彈出view
public void OpenView() {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
popupWindowView = inflater.inflate(R.layout.popupwindow, null);
popupWindow = new PopupWindow(popupWindowView,
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, true);
// 設置PopupWindow的彈出和消失效果
popupWindow.setAnimationStyle(R.style.popupAnimation);
btnsure = (Button) popupWindowView.findViewById(R.id.confirmButton);
btnsure.setOnClickListener(new ButtonOnClickListener());
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);
}
我們看到彈出來的有點動畫效果，是因為我們在彈出時，加上了
popupWindow.setAnimationStyle(R.style.popupAnimation);
我們需要在在styles.xml下加上popupAnimation
<style name="popupAnimation" parent="android:Animation">
<item name="android:windowEnterAnimation">@anim/in</item>
<item name="android:windowExitAnimation">@anim/out</item>
lt;/style>
在工程res下新建anim文件夾，在anim文件夾先新建兩個xml文件
in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="1500"
android:fromYDelta="5000"
android:toYDelta="0" />
</set>
out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromYDelta="0"
android:toYDelta="5000"
android:duration="1500"
/>
</set>
如果想要關閉彈出框
調用popupWindow.dismiss();就好.
完整的Activity源碼
public class MainActivity extends Activity {
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(new ButtonOnClickListener());
}
public void OpenView() {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
popupWindowView = inflater.inflate(R.layout.popupwindow, null);
popupWindow = new PopupWindow(popupWindowView,
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, true);
// 設置PopupWindow的彈出和消失效果
popupWindow.setAnimationStyle(R.style.popupAnimation);
btnsure = (Button) popupWindowView.findViewById(R.id.confirmButton);
btnsure.setOnClickListener(new ButtonOnClickListener());
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 class ButtonOnClickListener implements 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;
}
}
}
}
這樣一個簡單的PopupWindow例子就算完成了.
