Android检测版本更新

妖狐艹你老母 2022-07-14 10:59 208阅读 0赞

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一、准备

1.检测当前版本的信息AndroidManifest.xml-->manifest-->android:versionName。

2.从服务器获取版本号（版本号存在于xml文件中）并与当前检测到的版本进行匹配，如果不匹配，提示用户进行升级，如果匹配则进入程序主界面。

3.当提示用户进行版本升级时，如果用户点击了确定，系统将自动从服务器上下载并进行自动升级，如果点击取消将进入程序主界面。

二、效果图

[![1][]][1 1][![2][]][2 1][![3][]][3 1][![4][]][4 1]

三、必要说明

服务器端存储apk文件，同时有version.xml文件便于比对更新。

<?xml version="1.0" encoding="utf-8"?>
     <info>
     	<version>2.0</version>
     	<url>http://192.168.1.187:8080/mobilesafe.apk</url>
     	<description>检测到最新版本，请及时更新！</description>
     	<url_server>http://192.168.1.99/version.xml</url_server>
     </info>

通过一个实体类获取上述信息。

package com.android;
     public class UpdataInfo {
     	private String version;
     	private String url;
     	private String description;
     	private String url_server;
     	
     	public String getUrl_server() {
     		return url_server;
     	}
     	public void setUrl_server(String url_server) {
     		this.url_server = url_server;
     	}
     	public String getVersion() {
     		return version;
     	}
     	public void setVersion(String version) {
     		this.version = version;
     	}
     	public String getUrl() {
     		return url;
     	}
     	public void setUrl(String url) {
     		this.url = url;
     	}
     	public String getDescription() {
     		return description;
     	}
     	public void setDescription(String description) {
     		this.description = description;
     	}
     }

apk和版本信息地址都放在服务器端的version.xml里比较方便，当然如果服务器端不变动，apk地址可以放在strings.xml里，不过版本号信息是新的，必须放在服务器端，xml地址放在strings.xml。

<?xml version="1.0" encoding="utf-8"?>
     <resources>
         <string name="hello">Hello World, VersionActivity!</string>
         <string name="app_name">Version</string>
         <string name="url_server">http://192.168.1.99/version.xml</string>
     </resources>

不知道读者发现没有，笔者犯了个错误，那就是url\_server地址必须放在本地，否则怎么读取version.xml，所以url\_server不必在实体类和version里添加，毕竟是现需要version地址也就是url\_server，才能够读取version。

三、代码实现

<?xml version="1.0" encoding="utf-8"?>
     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:orientation="vertical" >
     	<Button 
     	    android:id="@+id/btn_getVersion"
     	    android:text="检查更新"
     	    android:layout_width="wrap_content"
     	    android:layout_height="wrap_content"/>
     </LinearLayout>

--------------------

package com.android;
     import java.io.InputStream;
     import org.xmlpull.v1.XmlPullParser;
     import android.util.Xml;
     public class UpdataInfoParser {
     	public static UpdataInfo getUpdataInfo(InputStream is) throws Exception{
     		XmlPullParser  parser = Xml.newPullParser();  
     		parser.setInput(is, "utf-8");
     		int type = parser.getEventType();
     		UpdataInfo info = new UpdataInfo();
     		while(type != XmlPullParser.END_DOCUMENT ){
     			switch (type) {
     			case XmlPullParser.START_TAG:
     				if("version".equals(parser.getName())){
     					info.setVersion(parser.nextText());	
     				}else if ("url".equals(parser.getName())){
     					info.setUrl(parser.nextText());	
     				}else if ("description".equals(parser.getName())){
     					info.setDescription(parser.nextText());	
     				}
     				break;
     			}
     			type = parser.next();
     		}
     		return info;
     	}
     }

--------------------

package com.android; import java.io.File; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import android.app.Activity; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.app.ProgressDialog; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class VersionActivity extends Activity {
         	private final String TAG = this.getClass().getName(); 	private final int UPDATA_NONEED = 0; 	private final int UPDATA_CLIENT = 1; 	private final int GET_UNDATAINFO_ERROR = 2; 	private final int SDCARD_NOMOUNTED = 3; 	private final int DOWN_ERROR = 4; 	private Button getVersion; 	private UpdataInfo info; 	private String localVersion; 	@Override 	public void onCreate(Bundle savedInstanceState) {
         		super.onCreate(savedInstanceState); 		setContentView(R.layout.main); 		getVersion = (Button) findViewById(R.id.btn_getVersion); 		getVersion.setOnClickListener(new OnClickListener() {
         			@Override 			public void onClick(View v) {
         				try {
         					localVersion = getVersionName(); 					CheckVersionTask cv = new CheckVersionTask(); 					new Thread(cv).start(); 				} catch (Exception e) {
         					// TODO Auto-generated catch block 					e.printStackTrace(); 				} 			} 		}); 	} 	private String getVersionName() throws Exception {
         		//getPackageName()是你当前类的包名，0代表是获取版本信息  		PackageManager packageManager = getPackageManager(); 		PackageInfo packInfo = packageManager.getPackageInfo(getPackageName(), 				0); 		return packInfo.versionName; 	} 	public class CheckVersionTask implements Runnable {
         		InputStream is; 		public void run() {
         			try {
         				String path = getResources().getString(R.string.url_server); 				URL url = new URL(path); 				HttpURLConnection conn = (HttpURLConnection) url 						.openConnection(); 				conn.setConnectTimeout(5000); 				conn.setRequestMethod("GET");                 int responseCode = conn.getResponseCode();                 if (responseCode == 200) {                     // 从服务器获得一个输入流                 	is = conn.getInputStream();                 } 				info = UpdataInfoParser.getUpdataInfo(is); 				if (info.getVersion().equals(localVersion)) {
         					Log.i(TAG, "版本号相同"); 					Message msg = new Message(); 					msg.what = UPDATA_NONEED; 					handler.sendMessage(msg); 					// LoginMain(); 				} else {
         					Log.i(TAG, "版本号不相同 "); 					Message msg = new Message(); 					msg.what = UPDATA_CLIENT; 					handler.sendMessage(msg); 				} 			} catch (Exception e) {
         				Message msg = new Message(); 				msg.what = GET_UNDATAINFO_ERROR; 				handler.sendMessage(msg); 				e.printStackTrace(); 			} 		} 	} 	Handler handler = new Handler() {
         		@Override 		public void handleMessage(Message msg) {
         			// TODO Auto-generated method stub 			super.handleMessage(msg); 			switch (msg.what) {
         			case UPDATA_NONEED: 				Toast.makeText(getApplicationContext(), "不需要更新", 						Toast.LENGTH_SHORT).show(); 			case UPDATA_CLIENT: 				 //对话框通知用户升级程序   				showUpdataDialog(); 				break; 			case GET_UNDATAINFO_ERROR: 				//服务器超时   	            Toast.makeText(getApplicationContext(), "获取服务器更新信息失败", 1).show(); 				break; 			case DOWN_ERROR: 				//下载apk失败  	            Toast.makeText(getApplicationContext(), "下载新版本失败", 1).show(); 				break; 			} 		} 	}; 	/* 	 *  	 * 弹出对话框通知用户更新程序  	 *  	 * 弹出对话框的步骤： 	 *  1.创建alertDialog的builder.   	 *  2.要给builder设置属性, 对话框的内容,样式,按钮 	 *  3.通过builder 创建一个对话框 	 *  4.对话框show()出来   	 */  	protected void showUpdataDialog() {
         		AlertDialog.Builder builer = new Builder(this); 		builer.setTitle("版本升级"); 		builer.setMessage(info.getDescription()); 		 //当点确定按钮时从服务器上下载 新的apk 然后安装   װ 		builer.setPositiveButton("确定", new DialogInterface.OnClickListener() {
         			public void onClick(DialogInterface dialog, int which) {
         				Log.i(TAG, "下载apk,更新"); 				downLoadApk(); 			} 		}); 		builer.setNegativeButton("取消", new DialogInterface.OnClickListener() {
         			public void onClick(DialogInterface dialog, int which) {
         				// TODO Auto-generated method stub 				//do sth 			} 		}); 		AlertDialog dialog = builer.create(); 		dialog.show(); 	} 	/* 	 * 从服务器中下载APK 	 */  	protected void downLoadApk() {  	    final ProgressDialog pd;    //进度条对话框  	    pd = new  ProgressDialog(this);  	    pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);  	    pd.setMessage("正在下载更新");  	    pd.show();  	    new Thread(){  	        @Override  	        public void run() {  	            try {  	                File file = DownLoadManager.getFileFromServer(info.getUrl(), pd);  	                sleep(3000);  	                installApk(file);  	                pd.dismiss(); //结束掉进度条对话框  	            } catch (Exception e) {  	                Message msg = new Message();  	                msg.what = DOWN_ERROR;  	                handler.sendMessage(msg);  	                e.printStackTrace();  	            }  	        }}.start();  	}  	  	//安装apk   	protected void installApk(File file) {  	    Intent intent = new Intent();  	    //执行动作  	    intent.setAction(Intent.ACTION_VIEW);  	    //执行的数据类型  	    intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");  	    startActivity(intent);  	}  }

--------------------

package com.android;
     import java.io.BufferedInputStream;
     import java.io.File;
     import java.io.FileOutputStream;
     import java.io.InputStream;
     import java.net.HttpURLConnection;
     import java.net.URL;
     import android.app.ProgressDialog;
     import android.os.Environment;
     public class DownLoadManager {
     	public static File getFileFromServer(String path, ProgressDialog pd) throws Exception{
     		//如果相等的话表示当前的sdcard挂载在手机上并且是可用的
     		if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
     			URL url = new URL(path);
     			HttpURLConnection conn =  (HttpURLConnection) url.openConnection();
     			conn.setConnectTimeout(5000);
     			//获取到文件的大小 
     			pd.setMax(conn.getContentLength());
     			InputStream is = conn.getInputStream();
     			File file = new File(Environment.getExternalStorageDirectory(), "updata.apk");
     			FileOutputStream fos = new FileOutputStream(file);
     			BufferedInputStream bis = new BufferedInputStream(is);
     			byte[] buffer = new byte[1024];
     			int len ;
     			int total=0;
     			while((len =bis.read(buffer))!=-1){
     				fos.write(buffer, 0, len);
     				total+= len;
     				//获取当前下载量
     				pd.setProgress(total);
     			}
     			fos.close();
     			bis.close();
     			is.close();
     			return file;
     		}
     		else{
     			return null;
     		}
     	}
     }

--------------------

<uses-permission android:name="android.permission.INTERNET"/>
     	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

四、参考文献

[                http://blog.csdn.net/furongkang/article/details/6886526][http_blog.csdn.net_furongkang_article_details_6886526]

[1]: http://images.cnitblog.com/blog/387014/201405/141108200312091.gif
[1 1]: http://images.cnitblog.com/blog/387014/201405/141108193758489.gif
[2]: http://images.cnitblog.com/blog/387014/201405/141108209843249.gif
[2 1]: http://images.cnitblog.com/blog/387014/201405/141108205319176.gif
[3]: http://images.cnitblog.com/blog/387014/201405/141108217188107.gif
[3 1]: http://images.cnitblog.com/blog/387014/201405/141108213594064.gif
[4]: /images/20220714/56d8d564b3fa4490b699163a7f497d0f.png
[4 1]: http://images.cnitblog.com/blog/387014/201405/141108222342964.gif
[http_blog.csdn.net_furongkang_article_details_6886526]: http://blog.csdn.net/furongkang/article/details/6886526