Android_Accessibility

Accessibility服务可以为所有的应用程，一组应用程序或单个应用程序提供这些增强功能。

1. 新建一个类继承 AccessibilityService

   public class InstallAccessibilityService extends AccessibilityService
   

2. AndroidManifest文件里注册

   <service    
   android:name=".InstallAccessibilityService"    
   android:label="智能安装"    
   android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">    
   <intent-filter>        
   <action android:name="android.accessibilityservice.AccessibilityService" />    
   </intent-filter>    
   <meta-data               
   android:name="android.accessibilityservice"               
   android:resource="@xml/accessibility_service_config" />
   </service>
   

3. accessibility_service_config.xml
   AndroidManifest里添加<meta-data>标签，在标签里指出配置文件的位置

   <accessibility-service 
    xmlns:android="http://schemas.android.com/apk/res/android"    
    android:packageNames="com.android.packageinstaller"    
    android:description="@string/accessibility_service_description"    
    android:accessibilityEventTypes="typeAllMask"    
    android:accessibilityFlags="flagDefault"    
    android:accessibilityFeedbackType="feedbackGeneric"    
    android:canRetrieveWindowContent="true"    />
   

4. AccessibilityService 方法重载

onServiceConnected() - 可选。系统会在成功连接上你的服务的时候调用这个方法，在这个方法里你可以做一下初始化工作，例如设备的声音震动管理，也可以调用setServiceInfo()进行配置工作。

onAccessibilityEvent() - 必须。通过这个函数可以接收系统发送来的AccessibilityEvent，接收来的AccessibilityEvent是经过过滤的，过滤是在配置工作时设置的。

onInterrupt() - 必须。这个在系统想要中断AccessibilityService返给的响应时会调用。在整个生命周期里会被调用多次。

onUnbind() - 可选。在系统将要关闭这个AccessibilityService会被调用。在这个方法中进行一些释放资源的工作

5. 一般在onServiceConnected()方法里进行

   private void setServiceInfo(int feedbackType) {  
   AccessibilityServiceInfo info = new AccessibilityServiceInfo();      
   info.eventTypes = AccessibilityEvent.TYPES_ALL_MASK; 
    info.feedbackType = feedbackType;  
    info.notificationTimeout = EVENT_NOTIFICATION_TIMEOUT_MILLIS;  
    info.packageNames = PACKAGE_NAMES;  
    setServiceInfo(info);  
    }
   

6. 智能安装apk

   private void installApk(String path) {    
   if (!path.endsWith(".apk")) {        
   Toast.makeText(this, "文件不可安装", Toast.LENGTH_SHORT).show();   
   } else {        
   if (!isRoot()) {            
   Toast.makeText(this, "没有ROOT权限，将进行智能安装", Toast.LENGTH_SHORT).show();                     
   smartInstall(path);        
   } else {            
   silentInstall(path);        }    }}
   private void silentInstall(final String path) {    
   new Thread(new Runnable() {        
   @Override        
   public void run() {            
   SilentInstall installHelper = new SilentInstall();            
   final boolean result = installHelper.install(path);            
    runOnUiThread(new Runnable() {                
   @Override                
   public void run() {                    
   if (result) {                        
   installBtn.setText("安装成功");                    
   } else {                        
   installBtn.setText("安装失败");                    
   }                    
    installBtn.setText("秒装");                
   }            
   });        
   }    
   }).start();
    }
   private void smartInstall(String path) {    
   Uri uri = Uri.fromFile(new File(path));    
   Intent localIntent = new Intent(Intent.ACTION_VIEW);    
   localIntent.setDataAndType(uri, "application/vnd.android.package-archive");   
   try {        startActivity(localIntent);    } catch (Exception e) {        e.printStackTrace();    }}
   
   
   public class SilentInstall {    
   public boolean install(String path) {        
   boolean result = false;        
   DataOutputStream dataOutputStream = null;        
   BufferedReader bufferedReader = null;       
   try {            
   Process process = Runtime.getRuntime().exec("su");            
   dataOutputStream = new DataOutputStream(process.getOutputStream());            
   String commmad = "pm instll -r " + path + "\n";            
   dataOutputStream.write(commmad.getBytes(Charset.forName("utf-8")));            
   dataOutputStream.flush();            
   dataOutputStream.writeBytes("exit\n");            
   dataOutputStream.flush();            
   process.waitFor();            
   bufferedReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));            
   String msg = ""; 
       String line = "";
        while ((line = bufferedReader.readLine()) != null) {
            msg += line;
        }
        if (!msg.contains("Failure")) {
            result = true;
        }
     } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (dataOutputStream != null) {
                dataOutputStream.close();
            } 
           if (bufferedReader != null) { 
               bufferedReader.close();
            } 
       } catch (IOException e) { 
          e.printStackTrace(); 
       } 
   } 
   return result;
   

   }}
   7 开启辅助功能

   Intent intent = new Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS);
   startActivity(intent);