一、 说明:
本示例是在上一个示例(Android应用自身升级)的基础上完成的。环境配置也同上一个demo一样。只是增加了一些功能用来检测Android系统中所有需要升级的应用程序,并从服务器上下载更新。
二、 功能需求说明:
a) 检测出Android系统中所有已安装的应用(区别与Android系统自带的应用),并获得每个应用的信息。
b) 根据上一步获得的系统中已安装的应用信息,通过http连接tomcat7服务器,检测每个应用的代码版本并与当前应用的代码版本进行比较,然后将需要更新的应用显示 在ListView中。
c) 在ListView的onItemClick事件中提示是否下载并更新当前的应用。
d) 监听系统的程序安装和替换广播,当收到系统中有程序安装或替换时,刷新当前的ListView视图以及Activity的标题(Activity的标题用于提示当前需要更新的应用程序数量)。
三、 应用需求的前提假设:
a) 服务器端的配置:
在tomcat7服务器的根目录下新建AppUpdate目录,作为更新程序访问的根目录。
b) Apk文件的下载路径的标准假设:
在搜寻到系统所有用户安装的应用后,需要访问服务器中对应的每一个应用的version.json配置文件,进行代码版本的比较。该搜寻路径的标准规则我们假定为:
系统当前安装的每一个应用对应的新版本所在的路径为:
http://10.0.2.2:8080/AppUpdate/应用程序名/version.json,其中的应用程序名与当前安装的应用程序名相对应,鉴于应用程序名中可能包含‘.’和空格(目前只发现这两 种情况),我们将应用程序名中所有的‘.’和空格都以下划线代替。例如:
我们搜到系统中当前已安装的应用名为Sample Soft Keyboard的应用(包含空格),服务器中对应的version.json文件的远程路径为:
http://10.0.2.2:8080/AppUpdate/Sample_Soft_Keyboard/version.json,(Sample,Soft,Keyboard之间有下划线),对应的新的Apk文件的远程路径为:
http://10.0.2.2:8080/AppUpdate/Sample_Soft_Keyboard/Sample_Soft_Keyboard.apk
四、 流程以及关键技术说明:
1) 首先要扫描出系统所有的应用信息,并过滤掉系统自带的应用,只保存用户安装的应用。代码示例:
-
public void scanNeedUpdateApp(){
-
List<PackageInfo> appPackage = getPackageManager().getInstalledPackages(0);//获得系统所有应用的安装包信息
-
for(int i=0; i<appPackage.size(); i++){
-
PackageInfo packageInfo = appPackage.get(i);
-
ApplicationInfo tmpAppInfo = new ApplicationInfo();
-
tmpAppInfo.appName = packageInfo.applicationInfo.loadLabel(getPackageManager()).toString();
-
tmpAppInfo.packageName = packageInfo.packageName;
-
tmpAppInfo.versionName = packageInfo.versionName;
-
tmpAppInfo.versionCode = packageInfo.versionCode;
-
tmpAppInfo.appIcon = packageInfo.applicationInfo.loadIcon(getPackageManager());
-
//只添加非系统应用
-
if((packageInfo.applicationInfo.flags & android.content.pm.ApplicationInfo.FLAG_SYSTEM) == 0){
-
String appName = tmpAppInfo.appName.toString().replace('.', ' ');
-
String VerJSONPath =webServicePath + appName +"/" +"version.json";
-
VerJSONPath = VerJSONPath.replaceAll(" ", "_");//拼接对应的version.json的访问路径
-
System.out.println(VerJSONPath);
-
try {
-
JSONObject jsonObj = GetNewVersionCode.getVersionJSON(VerJSONPath);
-
if(jsonObj != null){
-
Log.i("JSONnotNull","json 不为空!");
-
int newVersionCode = Integer.parseInt(jsonObj.getString("versionCode"));
-
System.out.print("旧代码版本");
-
System.out.println(tmpAppInfo.versionCode);
-
System.out.print("新代码版本");
-
System.out.println(newVersionCode);
-
if(tmpAppInfo.versionCode < newVersionCode){
-
tmpAppInfo.newVersionCode = newVersionCode;
-
tmpAppInfo.newVersionName = jsonObj.getString("versionName");
-
needUpdateList.add(tmpAppInfo);//将第三方的应用添加到列表中
-
}
-
}
-
} catch (Exception e) {
-
// TODO Auto-generated catch block
-
e.printStackTrace();
-
}
-
}
-
}
-
}
-
public void scanNeedUpdateApp(){
-
List<PackageInfo> appPackage = getPackageManager().getInstalledPackages(0);//获得系统所有应用的安装包信息
-
for(int i=0; i<appPackage.size(); i++){
-
PackageInfo packageInfo = appPackage.get(i);
-
ApplicationInfo tmpAppInfo = new ApplicationInfo();
-
tmpAppInfo.appName = packageInfo.applicationInfo.loadLabel(getPackageManager()).toString();
-
tmpAppInfo.packageName = packageInfo.packageName;
-
tmpAppInfo.versionName = packageInfo.versionName;
-
tmpAppInfo.versionCode = packageInfo.versionCode;
-
tmpAppInfo.appIcon = packageInfo.applicationInfo.loadIcon(getPackageManager());
-
//只添加非系统应用
-
if((packageInfo.applicationInfo.flags & android.content.pm.ApplicationInfo.FLAG_SYSTEM) == 0){
-
String appName = tmpAppInfo.appName.toString().replace('.', ' ');
-
String VerJSONPath =webServicePath + appName +"/" +"version.json";
-
VerJSONPath = VerJSONPath.replaceAll(" ", "_");//拼接对应的version.json的访问路径
-
System.out.println(VerJSONPath);
-
try {
-
JSONObject jsonObj = GetNewVersionCode.getVersionJSON(VerJSONPath);
-
if(jsonObj != null){
-
Log.i("JSONnotNull","json 不为空!");
-
int newVersionCode = Integer.parseInt(jsonObj.getString("versionCode"));
-
System.out.print("旧代码版本");
-
System.out.println(tmpAppInfo.versionCode);
-
System.out.print("新代码版本");
-
System.out.println(newVersionCode);
-
if(tmpAppInfo.versionCode < newVersionCode){
-
tmpAppInfo.newVersionCode = newVersionCode;
-
tmpAppInfo.newVersionName = jsonObj.getString("versionName");
-
needUpdateList.add(tmpAppInfo);//将第三方的应用添加到列表中
-
}
-
}
-
} catch (Exception e) {
-
// TODO Auto-generated catch block
-
e.printStackTrace();
-
}
-
}
-
}
-
}
说明: 获得已安装的应用程序信息 可以通过getPackageManager()方法获得
Public abstract PackageManager getPackageManager(), 然后将所有已安装的包信息放入List<PackageInfo>泛型中。方法如下
Public abstract List<PackageInfo> getInstalledPackages(int flags)
过滤第三方应用,所有的系统应用的flag标志为FALG_SYSTEM(值为1),第三方的应用为flag标志的值为0
2) 填充ListView的adapter数据集,并刷新ListView,代码示例如下:
-
//填充ListView
-
public void fillListView(){
-
ListView newUpdateListView = (ListView)findViewById(R.id.listview);
-
appAdapter =new NeedUpdateListAdapter(this,needUpdateList);//填充adapter数据集
-
newUpdateListView.setDividerHeight(5);
-
if(!appAdapter.isEmpty()){
-
int needUpdateCount = appAdapter.getCount();
-
setTitle("当前发现"+needUpdateCount + "款应用需要升级!");
-
newUpdateListView.setAdapter(appAdapter);//填充ListView
-
newUpdateListView.setOnItemClickListener(this);//设置ListView中Item的单击事件
-
}else{
-
setTitle("未发现需要升级的应用!");
-
}
-
}
-
//填充ListView
-
public void fillListView(){
-
ListView newUpdateListView = (ListView)findViewById(R.id.listview);
-
appAdapter =new NeedUpdateListAdapter(this,needUpdateList);//填充adapter数据集
-
newUpdateListView.setDividerHeight(5);
-
if(!appAdapter.isEmpty()){
-
int needUpdateCount = appAdapter.getCount();
-
setTitle("当前发现"+needUpdateCount + "款应用需要升级!");
-
newUpdateListView.setAdapter(appAdapter);//填充ListView
-
newUpdateListView.setOnItemClickListener(this);//设置ListView中Item的单击事件
-
}else{
-
setTitle("未发现需要升级的应用!");
-
}
-
}
3) 注册一个Handler用于在ListView刷新之后,刷新ListView所在的Activity的标题(用于显示当前剩余的需要更新的应用数量)代码示例:
-
//注册refreshTitleHandler,用于在广播接收中更新Activity的标题
-
public void registerRefreshTitleHandler(){
-
refreshTitleHandler = new Handler(){
-
public void handleMessage(Message msg){
-
switch(msg.what){
-
case 0:setTitle("当前发现"+appAdapter.getCount()+"款应用需要升级");break;
-
}
-
super.handleMessage(msg);
-
}
-
};
-
}
-
//注册refreshTitleHandler,用于在广播接收中更新Activity的标题
-
public void registerRefreshTitleHandler(){
-
refreshTitleHandler = new Handler(){
-
public void handleMessage(Message msg){
-
switch(msg.what){
-
case 0:setTitle("当前发现"+appAdapter.getCount()+"款应用需要升级");break;
-
}
-
super.handleMessage(msg);
-
}
-
};
-
}
4) 监听系统中应用程序的安装和替换广播,并在广播接收中刷新ListView
说明:因为在新版本的应用下载更新时会进入系统自带的安装程序,所以我们要监听系统发送的有应用程序安装或者替换的广播
(”android.intent.action.PACKAGE_REPLACED”),并在广播接收函数onReceiver()中处理刷新ListView视图,这就涉及到不同的类中更新UI界面的问题。在这里我们的 解决方案是在接收到广播刷新ListView后向Activity的Handle发送一个消息,用于更新Activity的标题。(Handle我们设置成全局静态的方便引用)。代码示例如下:
-
public class RefreshListViewBroadcastReceiver extends BroadcastReceiver {
-
@Override
-
public void onReceive(Context context, Intent intent) {
-
// TODO Auto-generated method stub
-
Log.i("Broadcast", "我是广播");
-
if(intent.getAction().equals("android.intent.action.PACKAGE_REPLACED")){
-
//获取被替换的包名,因为getDataString()返回的值包含了“package:“,所以要从第八的位置开始截取
-
String replacedPackageName =intent.getDataString().substring(8);
-
if(!context.getPackageName().equals(replacedPackageName)){
-
Log.i("curPackName",context.getPackageName());
-
System.out.print(replacedPackageName);
-
Log.i("replacedPack",replacedPackageName);
-
if(CheckUpdateAllActivity.appAdapter.remove(replacedPackageName)){
-
//刷新主Activity的Titlt
-
Message message = new Message();
-
message.what = 0;
-
CheckUpdateAllActivity.refreshTitleHandler.sendMessage(message);
-
}
-
}
-
}
-
}
-
}
-
public class RefreshListViewBroadcastReceiver extends BroadcastReceiver {
-
@Override
-
public void onReceive(Context context, Intent intent) {
-
// TODO Auto-generated method stub
-
Log.i("Broadcast", "我是广播");
-
if(intent.getAction().equals("android.intent.action.PACKAGE_REPLACED")){
-
//获取被替换的包名,因为getDataString()返回的值包含了“package:“,所以要从第八的位置开始截取
-
String replacedPackageName =intent.getDataString().substring(8);
-
if(!context.getPackageName().equals(replacedPackageName)){
-
Log.i("curPackName",context.getPackageName());
-
System.out.print(replacedPackageName);
-
Log.i("replacedPack",replacedPackageName);
-
if(CheckUpdateAllActivity.appAdapter.remove(replacedPackageName)){
-
//刷新主Activity的Titlt
-
Message message = new Message();
-
message.what = 0;
-
CheckUpdateAllActivity.refreshTitleHandler.sendMessage(message);
-
}
-
}
-
}
-
}
-
}
进一步说明:广播接收的注册方式有两种,一种是静态注册(在xml文件中),另一种是动态注册(在代码中),二者的区别在于:生命周期不一样。若以静态方式注册 的广播,在第一次注册之后就与其所在的应用程序无关了,即在应用程序退出后,系统仍然能接受到该广播(若在应用程序退出后有该广播发出)。以动态方式注册的广 播与程序有关,即程序退出后,就无法处理对应的广播了。示例中接受系统程序是否被替换的广播会监听自身的替换(重新RunAs),所以我们要屏蔽掉自身的替换,如 果不屏蔽的话在开始RunAs自己后(监听了自己)会找不到程序中的appAdapter(因为程序还没开始运行)而报出空指针异常的现象。所以我们根据上下文(context)来 获得当前应用的包名,并与此时被替换的包名(通过intent来获得)作比较来过滤掉自身的监听。
5) ListView的Item单击事件。ListView中显示的Item代表可升级的应用程序,若用户单击Item项后,弹出是否更新的对话框。
-
//ListView中Item的单击事件
-
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
-
// TODO Auto-generated method stub
-
ApplicationInfo clickedItemInfo = (ApplicationInfo) appAdapter.getItem(position);
-
curClickItemAppName = clickedItemInfo.appName;
-
StringBuffer sb = new StringBuffer();
-
Log.i("adapterVerName",clickedItemInfo.versionName);
-
sb.append("当前版本:" + "\n");
-
sb.append("版本名称:" + clickedItemInfo.versionName);
-
sb.append("版本代码:" + clickedItemInfo.versionCode + "\n");
-
sb.append("发现新版本:" + "\n");
-
sb.append("版本名称:" + clickedItemInfo.newVersionName);
-
sb.append("版本代码:" + clickedItemInfo.newVersionCode + "\n");
-
sb.append("是否更新?");
-
Dialog dialog = new AlertDialog.Builder(CheckUpdateAllActivity.this)
-
.setTitle("软件更新")
-
.setMessage(sb.toString())
-
.setPositiveButton("立即更新", new DialogInterface.OnClickListener() {
-
-
@Override
-
public void onClick(DialogInterface dialog, int which) {
-
// TODO Auto-generated method stub
-
if(curClickItemAppName != ""){
-
String appName = curClickItemAppName.replace('.', ' ');
-
String loadUrl = webServicePath + appName +"/" +appName +".apk";
-
loadUrl = loadUrl.replaceAll(" ", "_");
-
Log.i("LoadUrl", loadUrl);
-
downLoadApkFile(loadUrl, appName);
-
}else{
-
curClickItemAppName = "";
-
}
-
}
-
})
-
.setNegativeButton("暂不更新", new DialogInterface.OnClickListener() {
-
-
@Override
-
public void onClick(DialogInterface dialog, int which) {
-
// TODO Auto-generated method stub
-
curClickItemAppName = "";
-
}
-
}).create();
-
dialog.show();
-
}
-
//ListView中Item的单击事件
-
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
-
// TODO Auto-generated method stub
-
ApplicationInfo clickedItemInfo = (ApplicationInfo) appAdapter.getItem(position);
-
curClickItemAppName = clickedItemInfo.appName;
-
StringBuffer sb = new StringBuffer();
-
Log.i("adapterVerName",clickedItemInfo.versionName);
-
sb.append("当前版本:" + "\n");
-
sb.append("版本名称:" + clickedItemInfo.versionName);
-
sb.append("版本代码:" + clickedItemInfo.versionCode + "\n");
-
sb.append("发现新版本:" + "\n");
-
sb.append("版本名称:" + clickedItemInfo.newVersionName);
-
sb.append("版本代码:" + clickedItemInfo.newVersionCode + "\n");
-
sb.append("是否更新?");
-
Dialog dialog = new AlertDialog.Builder(CheckUpdateAllActivity.this)
-
.setTitle("软件更新")
-
.setMessage(sb.toString())
-
.setPositiveButton("立即更新", new DialogInterface.OnClickListener() {
-
-
@Override
-
public void onClick(DialogInterface dialog, int which) {
-
// TODO Auto-generated method stub
-
if(curClickItemAppName != ""){
-
String appName = curClickItemAppName.replace('.', ' ');
-
String loadUrl = webServicePath + appName +"/" +appName +".apk";
-
loadUrl = loadUrl.replaceAll(" ", "_");
-
Log.i("LoadUrl", loadUrl);
-
downLoadApkFile(loadUrl, appName);
-
}else{
-
curClickItemAppName = "";
-
}
-
}
-
})
-
.setNegativeButton("暂不更新", new DialogInterface.OnClickListener() {
-
-
@Override
-
public void onClick(DialogInterface dialog, int which) {
-
// TODO Auto-generated method stub
-
curClickItemAppName = "";
-
}
-
}).create();
-
dialog.show();
-
}
说明:被单击的Item对应的应用程序信息的获取通过getItem(position)来完成,该函数返回的对象类型即Adapter中保存的数据类型,强转一下就可以了。之后就是按照 我们事先约定的新版本Apk的远程访问路径规则来拼接Apk的下载路径了。
6) 下载新版本的apk文件。这一步没什么好说的了,上一篇已经很详细了(Android单个应用自身的升级)示例如下:
-
//下载新的apk应用文件
-
protected void downLoadApkFile(final String url, final String appName) {
-
// TODO Auto-generated method stub
-
pBar = new ProgressDialog(CheckUpdateAllActivity.this);
-
pBar.setTitle("正在下载");
-
pBar.setMessage("请稍候...");
-
pBar.setProgressStyle(ProgressDialog.STYLE_SPINNER);
-
pBar.show();
-
new Thread(){
-
public void run(){
-
HttpClient httpClient = new DefaultHttpClient();
-
HttpGet httpGet = new HttpGet(url);
-
HttpResponse httpResponse;
-
try {
-
httpResponse = httpClient.execute(httpGet);
-
if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
-
HttpEntity httpEntity = httpResponse.getEntity();
-
InputStream is = httpEntity.getContent();
-
FileOutputStream fos = null;
-
if(is !=null){
-
File file = new File(Environment.getExternalStorageDirectory(),appName+".apk");
-
fos = new FileOutputStream(file);
-
byte[] buf = new byte[1024];
-
int ch = -1;
-
do{
-
ch = is.read(buf);
-
if(ch <= 0)break;
-
fos.write(buf, 0, ch);
-
}while(true);
-
is.close();
-
fos.close();
-
haveDownLoad(appName + ".apk");
-
}else{
-
throw new RuntimeException("isStream is null");
-
}
-
}else if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_NOT_FOUND){
-
//404未找到相应的文件
-
Looper.prepare();
-
Toast toast = Toast.makeText(CheckUpdateAllActivity.this, "未找到对应的Apk文件!", 1);
-
pBar.cancel();
-
toast.show();
-
Looper.loop();
-
}
-
} catch (ClientProtocolException e) {
-
// TODO Auto-generated catch block
-
e.printStackTrace();
-
} catch (IOException e) {
-
// TODO Auto-generated catch block
-
e.printStackTrace();
-
}
-
}
-
}.start();
-
}
-
//下载新的apk应用文件
-
protected void downLoadApkFile(final String url, final String appName) {
-
// TODO Auto-generated method stub
-
pBar = new ProgressDialog(CheckUpdateAllActivity.this);
-
pBar.setTitle("正在下载");
-
pBar.setMessage("请稍候...");
-
pBar.setProgressStyle(ProgressDialog.STYLE_SPINNER);
-
pBar.show();
-
new Thread(){
-
public void run(){
-
HttpClient httpClient = new DefaultHttpClient();
-
HttpGet httpGet = new HttpGet(url);
-
HttpResponse httpResponse;
-
try {
-
httpResponse = httpClient.execute(httpGet);
-
if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
-
HttpEntity httpEntity = httpResponse.getEntity();
-
InputStream is = httpEntity.getContent();
-
FileOutputStream fos = null;
-
if(is !=null){
-
File file = new File(Environment.getExternalStorageDirectory(),appName+".apk");
-
fos = new FileOutputStream(file);
-
byte[] buf = new byte[1024];
-
int ch = -1;
-
do{
-
ch = is.read(buf);
-
if(ch <= 0)break;
-
fos.write(buf, 0, ch);
-
}while(true);
-
is.close();
-
fos.close();
-
haveDownLoad(appName + ".apk");
-
}else{
-
throw new RuntimeException("isStream is null");
-
}
-
}else if(httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_NOT_FOUND){
-
//404未找到相应的文件
-
Looper.prepare();
-
Toast toast = Toast.makeText(CheckUpdateAllActivity.this, "未找到对应的Apk文件!", 1);
-
pBar.cancel();
-
toast.show();
-
Looper.loop();
-
}
-
} catch (ClientProtocolException e) {
-
// TODO Auto-generated catch block
-
e.printStackTrace();
-
} catch (IOException e) {
-
// TODO Auto-generated catch block
-
e.printStackTrace();
-
}
-
}
-
}.start();
-
}
说明:简单的http通信的步骤:1.建立HttpClient客户端。2.创建访问路径HttpGet3.请求连接HttpResponse。通过http请求下载远端的文件时,有可能在所给的访问路径下 没有需要的文件,在这里请求状态通过HttpResponse.getStatusLine().getStatusCode()来获得。常见的请求回应码为200(请求成功),404(未找到对应的文件)。另 外我们在下载子线程中去取消了下载进度条(下载完成后),涉及了在子线程中去更新UI,这样违反了Android系统中UI单线程模型的原则,是不被允许的。所以要用 Looper或者Handle来处理。此处用了Looper。
7) 下载完成后提示是否安装,当选择取消后删除sdcard中下载的Apk文件。
-
//下载完成 关闭进度条,并提示是否安装
-
protected void haveDownLoad(final String fileName) {
-
// TODO Auto-generated method stub
-
pBar.cancel();//下载完成取消进度条
-
haveDownHandler.post(new Runnable(){
-
-
@Override
-
public void run() {
-
// TODO Auto-generated method stub
-
Dialog installDialog = new AlertDialog.Builder(CheckUpdateAllActivity.this)
-
.setTitle("下载完成")
-
.setMessage("是否安装新的应用")
-
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
-
-
@Override
-
public void onClick(DialogInterface dialog, int which) {
-
// TODO Auto-generated method stub
-
installNewApk(fileName);
-
}
-
})
-
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
-
-
@Override
-
public void onClick(DialogInterface dialog, int which) {
-
// TODO Auto-generated method stub
-
File downLoadApk = new File(Environment.getExternalStorageDirectory(),
-
fileName);
-
if(downLoadApk.exists()){
-
downLoadApk.delete();
-
}
-
}
-
}).create();
-
installDialog.show();
-
}
-
});
-
}
-
//下载完成 关闭进度条,并提示是否安装
-
protected void haveDownLoad(final String fileName) {
-
// TODO Auto-generated method stub
-
pBar.cancel();//下载完成取消进度条
-
haveDownHandler.post(new Runnable(){
-
-
@Override
-
public void run() {
-
// TODO Auto-generated method stub
-
Dialog installDialog = new AlertDialog.Builder(CheckUpdateAllActivity.this)
-
.setTitle("下载完成")
-
.setMessage("是否安装新的应用")
-
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
-
-
@Override
-
public void onClick(DialogInterface dialog, int which) {
-
// TODO Auto-generated method stub
-
installNewApk(fileName);
-
}
-
})
-
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
-
-
@Override
-
public void onClick(DialogInterface dialog, int which) {
-
// TODO Auto-generated method stub
-
File downLoadApk = new File(Environment.getExternalStorageDirectory(),
-
fileName);
-
if(downLoadApk.exists()){
-
downLoadApk.delete();
-
}
-
}
-
}).create();
-
installDialog.show();
-
}
-
});
-
}
8) 调用系统自带的安装程序进行安装。如果想采用静默安装,网上大侠们说要修改源码才可以。
-
//安装下载后的应用程序
-
private void installNewApk(final String fileName) {
-
// TODO Auto-generated method stub
-
Intent intent = new Intent(Intent.ACTION_VIEW);
-
intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory(),fileName)),
-
"application/vnd.android.package-archive");
-
startActivity(intent);
-
}
-
//安装下载后的应用程序
-
private void installNewApk(final String fileName) {
-
// TODO Auto-generated method stub
-
Intent intent = new Intent(Intent.ACTION_VIEW);
-
intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory(),fileName)),
-
"application/vnd.android.package-archive");
-
startActivity(intent);
-
}
9) JSON文件解析类。该类中封装了一个静态方法getVersionJSON()用于获得远程的version.json文件信息,返回对象类型为JSONObject,便于解析出每一个应用对应的 versionCode信息。示例如下:
-
public class GetNewVersionCode {
-
-
public static JSONObject getVersionJSON(String VerJSONPath) throws ClientProtocolException, IOException, JSONException{
-
StringBuilder VerJSON = new StringBuilder();
-
HttpClient client = new DefaultHttpClient();
-
HttpParams httpParams = client.getParams();
-
HttpConnectionParams.setConnectionTimeout(httpParams, 3000);
-
HttpConnectionParams.setSoTimeout(httpParams, 5000);
-
HttpResponse response;
-
response = client.execute(new HttpGet(VerJSONPath));
-
//请求成功
-
System.out.print("链接请求码:");
-
System.out.println(response.getStatusLine().getStatusCode());
-
if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
-
Log.i("ConOK","链接成功");
-
HttpEntity entity = response.getEntity();
-
if(entity != null){
-
BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(),"UTF-8"), 8192);
-
String line = null;
-
while((line = reader.readLine()) != null){
-
VerJSON.append(line+"\n");
-
}
-
reader.close();
-
JSONArray verJSONArray = new JSONArray(VerJSON.toString());
-
if(verJSONArray.length() > 0){
-
JSONObject obj = verJSONArray.getJSONObject(0);
-
return obj;
-
}
-
}
-
-
Log.i("ContFail","获取JSONObject失败!");
-
return null;
-
}
-
Log.i("ConFail","链接失败!");
-
return null;
-
}
-
}
-
public class GetNewVersionCode {
-
-
public static JSONObject getVersionJSON(String VerJSONPath) throws ClientProtocolException, IOException, JSONException{
-
StringBuilder VerJSON = new StringBuilder();
-
HttpClient client = new DefaultHttpClient();
-
HttpParams httpParams = client.getParams();
-
HttpConnectionParams.setConnectionTimeout(httpParams, 3000);
-
HttpConnectionParams.setSoTimeout(httpParams, 5000);
-
HttpResponse response;
-
response = client.execute(new HttpGet(VerJSONPath));
-
//请求成功
-
System.out.print("链接请求码:");
-
System.out.println(response.getStatusLine().getStatusCode());
-
if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
-
Log.i("ConOK","链接成功");
-
HttpEntity entity = response.getEntity();
-
if(entity != null){
-
BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(),"UTF-8"), 8192);
-
String line = null;
-
while((line = reader.readLine()) != null){
-
VerJSON.append(line+"\n");
-
}
-
reader.close();
-
JSONArray verJSONArray = new JSONArray(VerJSON.toString());
-
if(verJSONArray.length() > 0){
-
JSONObject obj = verJSONArray.getJSONObject(0);
-
return obj;
-
}
-
}
-
-
Log.i("ContFail","获取JSONObject失败!");
-
return null;
-
}
-
Log.i("ConFail","链接失败!");
-
return null;
-
}
-
}
10) 与ListView绑定的Adapter类,该类中最主要的方法是getCount()和getView()用于绘制ListView。在这里重写该类的构造方法,以便于在Adapter中保存我们需要的类型 (ApplicationInfo)。示例如下:
-
public class NeedUpdateListAdapter extends BaseAdapter {
-
-
Context context;
-
ArrayList<ApplicationInfo> needUpdateList = new ArrayList<ApplicationInfo>();
-
public NeedUpdateListAdapter(Context context, ArrayList<ApplicationInfo> newNeedUpdateList){
-
this.context = context;
-
needUpdateList.clear();
-
for(int i = 0; i<newNeedUpdateList.size(); i++){
-
needUpdateList.add(newNeedUpdateList.get(i));
-
}
-
}
-
@Override
-
public int getCount() {
-
// TODO Auto-generated method stub
-
return needUpdateList.size();
-
}
-
-
@Override
-
public Object getItem(int position) {
-
// TODO Auto-generated method stub
-
return needUpdateList.get(position);
-
}
-
-
@Override
-
public long getItemId(int position) {
-
// TODO Auto-generated method stub
-
return position;
-
}
-
-
@Override
-
public View getView(int position, View convertView, ViewGroup parent) {
-
// TODO Auto-generated method stub
-
View newView = convertView;
-
final ApplicationInfo appItem = needUpdateList.get(position);
-
if(newView == null){
-
LayoutInflater vi = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-
newView = vi.inflate(R.layout.check_update_list_item, null);
-
//newView.setClickable(true);加上此句ListViewi点击无响应,不知道是为什么
-
}
-
TextView appName = (TextView)newView.findViewById(R.id.appName);
-
ImageView appIcon=(ImageView)newView.findViewById(R.id.icon);
-
if(appName != null)
-
appName.setText(appItem.appName);
-
if(appIcon != null)
-
appIcon.setImageDrawable(appItem.appIcon);
-
return newView;
-
}
-
-
public boolean remove(String packageName){
-
boolean flag = false;
-
for(int i = 0; i < needUpdateList.size(); i++){
-
if(needUpdateList.get(i).packageName.equals(packageName)){
-
needUpdateList.remove(i);
-
flag = true;
-
Log.i("RemovePack", packageName);
-
notifyDataSetChanged();
-
}
-
}
-
if(flag){
-
flag = false;
-
return true;
-
}
-
return false;
-
}
-
public void removeAll(){
-
needUpdateList.clear();
-
notifyDataSetChanged();
-
}
-
}
-
public class NeedUpdateListAdapter extends BaseAdapter {
-
-
Context context;
-
ArrayList<ApplicationInfo> needUpdateList = new ArrayList<ApplicationInfo>();
-
public NeedUpdateListAdapter(Context context, ArrayList<ApplicationInfo> newNeedUpdateList){
-
this.context = context;
-
needUpdateList.clear();
-
for(int i = 0; i<newNeedUpdateList.size(); i++){
-
needUpdateList.add(newNeedUpdateList.get(i));
-
}
-
}
-
@Override
-
public int getCount() {
-
// TODO Auto-generated method stub
-
return needUpdateList.size();
-
}
-
-
@Override
-
public Object getItem(int position) {
-
// TODO Auto-generated method stub
-
return needUpdateList.get(position);
-
}
-
-
@Override
-
public long getItemId(int position) {
-
// TODO Auto-generated method stub
-
return position;
-
}
-
-
@Override
-
public View getView(int position, View convertView, ViewGroup parent) {
-
// TODO Auto-generated method stub
-
View newView = convertView;
-
final ApplicationInfo appItem = needUpdateList.get(position);
-
if(newView == null){
-
LayoutInflater vi = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-
newView = vi.inflate(R.layout.check_update_list_item, null);
-
//newView.setClickable(true);加上此句ListViewi点击无响应,不知道是为什么
-
}
-
TextView appName = (TextView)newView.findViewById(R.id.appName);
-
ImageView appIcon=(ImageView)newView.findViewById(R.id.icon);
-
if(appName != null)
-
appName.setText(appItem.appName);
-
if(appIcon != null)
-
appIcon.setImageDrawable(appItem.appIcon);
-
return newView;
-
}
-
-
public boolean remove(String packageName){
-
boolean flag = false;
-
for(int i = 0; i < needUpdateList.size(); i++){
-
if(needUpdateList.get(i).packageName.equals(packageName)){
-
needUpdateList.remove(i);
-
flag = true;
-
Log.i("RemovePack", packageName);
-
notifyDataSetChanged();
-
}
-
}
-
if(flag){
-
flag = false;
-
return true;
-
}
-
return false;
-
}
-
public void removeAll(){
-
needUpdateList.clear();
-
notifyDataSetChanged();
-
}
-
}
说明:当每绘制一项时就会调用一次getView()方法,就会装载一次我们建立的布局文件一次(check_update_list_item.xml),在getView方法中设置布局文件中的组件 (TextView和ImageView)就能得到我们想要的视图。另外添加两个方法remove()和removeAll()用于ListView的刷新(当我们下载安装新版本后)。其中 NotifyDataSetChanged()用于自动刷新ListView。
11) 应用程序信息类,主要用于保存应用程序的一些信息,如当前应用的程序名,包名,版本名称,版本代码,图标,所搜寻到的新版本的版本名称,新的版本代码。
-
public class ApplicationInfo {
-
-
public String appName = "";
-
public String packageName = "";
-
public String versionName = "";
-
public String newVersionName = "";
-
public int versionCode = 0;
-
public int newVersionCode = 0;
-
public Drawable appIcon = null;
-
-
}
-
public class ApplicationInfo {
-
-
public String appName = "";
-
public String packageName = "";
-
public String versionName = "";
-
public String newVersionName = "";
-
public int versionCode = 0;
-
public int newVersionCode = 0;
-
public Drawable appIcon = null;
-
-
}
源码下载连接:本篇源码下载
下面是一些效果图:
将系统所有已安装的应用添加到ListView中
点击更新某一个应用
下载新应用
下载完成提示安装
进入系统安装
更新完成后刷新ListView和Activity标题
当在远程服务器中没有找到对应的apk文件则提示错误。
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