Android 之版本更新

来源：互联网发布：淘宝店铺违规24分编辑：程序博客网时间：2024/05/16 06:41

/**
* 查询手机安装的应用
*
* @param context
* @return
*/

public static List<PackageInfo> getAllNotSystemApps(Context context) {
List<PackageInfo> apps = new ArrayList<PackageInfo>();
PackageManager pManager = context.getPackageManager();
List<PackageInfo> paklist = pManager.getInstalledPackages(0);
for (int i = 0; i < paklist.size(); i++) {
PackageInfo pak = (PackageInfo) paklist.get(i);
if ((pak.applicationInfo.flags & pak.applicationInfo.FLAG_SYSTEM) <= 0) {
apps.add(pak);
}
}
return apps;
}

/**
* 判断是否安装过此应用
*
* @param context 上下文
* @param packageName 应用的包名清单文件
*
* @return
*/

public static boolean isHaveApp(Context context, String packageName) {
PackageInfo pa = null;
List<PackageInfo> packages = getAllNotSystemApps(context);
for (int i = 0; i < packages.size(); i++) {
pa = packages.get(i);
String appPackage = pa.packageName;
if (appPackage.equals(packageName.trim())) {
return true;
}
}
return false;
}

/* 卸载
* packageName 应用的包名清单文件
*
* */

public static void uninstallApk(Context context, String packageName) {
Uri uri = Uri.parse("package:" + packageName);
Intent intent = new Intent(Intent.ACTION_DELETE, uri);
context.startActivity(intent);
}

//得到当前应用的VersionName VersionCode

private String getVersionName(Context context) {
String versionName = "";
try {
versionName = context.getPackageManager().getPackageInfo(
context.getApplicationInfo().packageName, 0).versionName;
versionCode = context.getPackageManager().getPackageInfo(
context.getApplicationInfo().packageName, 0).versionCode;
} catch (NameNotFoundException e) {
e.printStackTrace();
}
return versionName;
}

操作步骤：

1.首先判断是否安装过应用

2.如果安装过应用，就卸载

3.如果没有安装过，就下载更新

/**
* 判断应用是否安装过
*/
boolean haveApp = AppUtil.isHaveApp(this, "com.ideal.wdm.activity");
if (haveApp) {
//如果有就卸载apk
AppUtil.uninstallApk(this, "com.ideal.wdm.activity");
}

getUpate(); //更新下载操作

private void getUpate(){
AlertDialog.Builder builder = new Builder(mContext);
builder.setTitle("升级提示");
//内容模拟写死
builder.setMessage("版本：1.0.1\n大小：6.5M\n1、修改Bug\n2、增加功能");
builder.setNegativeButton("稍后再说", new AlertDialog.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.setPositiveButton("马上跟新", new AlertDialog.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
Intent intent = new Intent(mContext,DownloadService.class);
//模拟写死
intent.putExtra("url", "Http://cdn.weibaobiao.com/syy2.apk");
startService(intent);
}
});
builder.show();
}

开启服务下载：

public class DownloadService extends Service{
public static final String DOWNLOAD_PATH =
Environment.getExternalStorageDirectory().getAbsolutePath()+"/downloads/";
public static final String TAG = "download";
private String url;//下载链接
private Integer length;//文件长度
private String fileName=null;//文件名
private Notification notification;
private RemoteViews contentView;
private NotificationManager notificationManager;
private static final int MSG_INIT = 0;
private static final int URL_ERROR = 1;
private static final int NET_ERROR = 2;
private static final int DOWNLOAD_SUCCESS = 3;
private Handler mHandler = new Handler(){
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case MSG_INIT:
length =(Integer) msg.obj;
new DownloadThread(url,length).start();
createNotification();
break;
case DOWNLOAD_SUCCESS:
//下载完成
notifyNotification(100, 100);
installApk(DownloadService.this,new File(DOWNLOAD_PATH,fileName));
Toast.makeText(DownloadService.this, "下载完成", 0).show();
break;
case URL_ERROR:
Toast.makeText(DownloadService.this, "下载地址错误", 0).show();
break;
case NET_ERROR:
Toast.makeText(DownloadService.this, "连接失败，请检查网络设置", 0).show();
}
};
};
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if(intent != null){
//接收activity传过来的地址：
url = intent.getStringExtra("url");
if(url != null && !TextUtils.isEmpty(url)){
new InitThread(url).start();
}else{
mHandler.sendEmptyMessage(URL_ERROR);
}
}
return super.onStartCommand(intent, flags, startId);
}
/**
* 初始化子线程
* @author dong
*
*/
class InitThread extends Thread{
String url = "";
public InitThread(String url) {
this.url = url;
}
public void run() {
HttpURLConnection conn= null;
RandomAccessFile raf = null;
try {
//连接网络文件
URL url = new URL(this.url);
conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(3000);
conn.setRequestMethod("GET");
int length = -1;
if(conn.getResponseCode() == HttpStatus.SC_OK){
//获得文件长度
length = conn.getContentLength();
}
if(length <= 0){
return;
}
File dir = new File(DOWNLOAD_PATH);
if(!dir.exists()){
dir.mkdir();
}
fileName = this.url.substring(this.url.lastIndexOf("/")+1, this.url.length());
if(fileName==null && TextUtils.isEmpty(fileName) && !fileName.contains(".apk")){
fileName = getPackageName()+".apk";
}
File file = new File(dir, fileName);
raf = new RandomAccessFile(file, "rwd");
//设置文件长度
raf.setLength(length);
mHandler.obtainMessage(MSG_INIT,length).sendToTarget();
} catch (Exception e) {
mHandler.sendEmptyMessage(URL_ERROR);
e.printStackTrace();
} finally{
try {
conn.disconnect();
raf.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
/**
* 下载线程
* @author dong
*
*/
class DownloadThread extends Thread{
String url;
int length;
public DownloadThread(String url, int length) {
this.url = url;
this.length = length;
}
@Override
public void run() {
HttpURLConnection conn = null;
RandomAccessFile raf = null;
InputStream input = null;
try {
URL url = new URL(this.url);
conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(3000);
conn.setRequestMethod("GET");
//设置下载位置
int start =0;
conn.setRequestProperty("Range", "bytes="+0+"-"+length);
//设置文件写入位置
File file = new File(DownloadService.DOWNLOAD_PATH,fileName);
raf = new RandomAccessFile(file, "rwd");
raf.seek(start);
long mFinished = 0;
//开始下载
if(conn.getResponseCode() == HttpStatus.SC_PARTIAL_CONTENT){
//LogUtil.i("下载开始了。。。");
//读取数据
input = conn.getInputStream();
byte[] buffer = new byte[1024*4];
int len = -1;
long speed = 0;
long time = System.currentTimeMillis();
while((len = input.read(buffer)) != -1){
//写入文件
raf.write(buffer,0,len);
//把下载进度发送广播给Activity
mFinished += len;
speed += len;
if(System.currentTimeMillis() - time > 1000){
time = System.currentTimeMillis();
notifyNotification(mFinished,length);
Log.i(TAG, "mFinished=="+mFinished);
Log.i(TAG, "length=="+length);
Log.i(TAG, "speed=="+speed);
speed = 0;
}
}
mHandler.sendEmptyMessage(DOWNLOAD_SUCCESS);
Log.i(TAG, "下载完成了。。。");
}else{
Log.i(TAG, "下载出错了。。。");
mHandler.sendEmptyMessage(NET_ERROR);
}
} catch (Exception e) {
e.printStackTrace();
} finally{
try {
if(conn != null){
conn.disconnect();
}
if(raf != null){
raf.close();
}
if(input != null ){
input.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
@SuppressWarnings("deprecation")
public void createNotification() {
notification = new Notification(
R.drawable.ic_launcher,//应用的图标
"安装包正在下载...",
System.currentTimeMillis());
notification.flags = Notification.FLAG_ONGOING_EVENT;
//notification.flags = Notification.FLAG_AUTO_CANCEL;
/*** 自定义 Notification 的显示****/
contentView = new RemoteViews(getPackageName(),R.layout.notification_item);
contentView.setProgressBar(R.id.progress, 100, 0, false);
contentView.setTextViewText(R.id.tv_progress, "0%");
notification.contentView = contentView;
/*updateIntent = new Intent(this, AboutActivity.class);
updateIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
updateIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
pendingIntent = PendingIntent.getActivity(this, 0, updateIntent, 0);
notification.contentIntent = pendingIntent;*/
notification.flags = Notification.FLAG_AUTO_CANCEL;
notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
//设置notification的PendingIntent
/*Intent intt = new Intent(this, MainActivity.class);
PendingIntent pi = PendingIntent.getActivity(this,100, intt,Intent.FLAG_ACTIVITY_NEW_TASK| Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
notification.contentIntent = pi;*/
notificationManager.notify(R.layout.notification_item, notification);
}
private void notifyNotification(long percent,long length){
contentView.setTextViewText(R.id.tv_progress, (percent*100/length)+"%");
contentView.setProgressBar(R.id.progress, (int)length,(int)percent, false);
notification.contentView = contentView;
notificationManager.notify(R.layout.notification_item, notification);
}
/**
* 安装apk
*
* @param context 上下文
* @param file APK文件
*/
public static void installApk(Context context, File file) {
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),
"application/vnd.android.package-archive");
context.startActivity(intent);
}
}

notification_item.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="60dp"
android:orientation="horizontal">
<ImageView
android:layout_width="60dp"
android:layout_height="60dp"
android:background="@drawable/ic_launcher"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<TextView
android:layout_centerVertical="true"
android:padding="5dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="安装包正在下载..."
/>
<TextView
android:id="@+id/tv_progress"
android:layout_alignParentRight="true"
android:padding="5dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0%"
/>
</RelativeLayout>
<ProgressBar
android:padding="5dp"
android:id="@+id/progress"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>

最后清单文件注册和添加权限：

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

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