高速公路合肥中标单位:弹出小窗口，PopupWindow的使用

在程序里弹出一个小窗口，像系统的MediaController一样，具体做法：先在mail.xml的layout布局里加一个id，这个到后面会用到的，

1 
2  3     android:orientation="vertical"
4     android:layout_width="fill_parent"
5     android:layout_height="fill_parent"
6     android:id="@+id/linear"
7     >

接着布局文件里写一个control.xml文件，里面放一些要显示的widget，

 1 
 2   3     android:orientation="vertical"
 4     android:layout_width="fill_parent"
 5     android:layout_height="fill_parent"
 6     android:gravity="center"
 7     android:background="#00000000"
 8     >
 9     10         android:orientation="horizontal"
11         android:layout_width="fill_parent"
12         android:layout_height="wrap_content"
13         android:gravity="center_horizontal"
14         android:layout_marginTop="5dip"
15         android:layout_marginBottom="5dip"
16         >
17         18         android:id="@+id/sounddown"
19         android:layout_width="wrap_content"
20         android:layout_height="wrap_content"
21         android:src="@drawable/sounddown"
22         />
23         
24         25         android:id="@+id/textNow"
26         android:layout_width="wrap_content"
27         android:layout_height="wrap_content"
28         android:textSize="20sp"
29         android:text="     "
30         />
31         32         android:id="@+id/seekbar"
33         android:layout_width="500dip"
34         android:layout_height="wrap_content"
35         android:max="10000"
36         />
37         38         android:id="@+id/textAll"
39         android:layout_width="wrap_content"
40         android:layout_height="wrap_content"
41         android:textSize="20sp"
42         android:text="     "
43         />
44         45         android:id="@+id/soundup"
46         android:layout_width="wrap_content"
47         android:layout_height="wrap_content"
48         android:src="@drawable/soundup"
49         />
50         
51       52       android:orientation="horizontal"
53       android:layout_width="fill_parent"
54       android:layout_height="wrap_content"
55       android:gravity="center_horizontal"
56       android:background="#0000003D" 
57        >
58        
59        
60     
61     

最后就是java文件，

 1 public class MainActivity extends Activity {
 2     /** Called when the activity is first created. */
 3     private Button show;
 4     public PopupWindow mPopupWindow;
 5     private boolean boo=true;
 6     @Override
 7     public void onCreate(Bundle savedInstanceState) {
 8         super.onCreate(savedInstanceState);
 9         setContentView(R.layout.main);
10         show = (Button) findViewById(R.id.button);
11         show.setOnClickListener(new Button.OnClickListener(){
12 
13             @Override
14             public void onClick(View v) {
15                 // TODO Auto-generated method stub
16                  if(boo){
17                     boo=false;
18                     check();
19                     mPopupWindow.showAtLocation(findViewById(R.id.linear), Gravity.RIGHT|Gravity.BOTTOM, 0,0);
20                 }else{
21                     boo=true;
22                     mPopupWindow.dismiss();
23                 }
24                 
25             }});
26     }
27 
28     private void check(){
29         if(mPopupWindow==null){
30             mPopupWindow=new PopupWindow(getLayoutInflater().inflate(R.layout.controler, null),LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT);
31         }
32         if(mPopupWindow.isShowing()){
33             mPopupWindow.dismiss();
34         }
35     }
36 }