Android实现APP在线下载更新
前言
项目地址：UpdateAppDemo
现在的android应用app会隔一段时间发布一个新的版本，当你打开某个app，如果有最新的版本，会提醒你是否下载更新。本文利用android自带的下载管理器DownloadManager进行下载最新版本的apk，下载完成后自动跳转安装。效果如下：
第一步、检查版本并判断是否需要更新
通过获取当前app版本号与服务器上的版本号进行对比，如果本地的版本号低于服务器版本号，则弹出提示框：发现新版本，是否下载更新。
/**
* Created by Teprinciple on 2016/11/15.
*/
public class UpdateAppUtil {
/**
* 获取当前apk的版本号 currentVersionCode
* @param ctx
* @return
*/
public static int getAPPLocalVersion(Context ctx) {
int currentVersionCode = 0;
PackageManager manager = ctx.getPackageManager();
try {
PackageInfo info = manager.getPackageInfo(ctx.getPackageName(), 0);
String appVersionName = info.versionName; // 版本名
currentVersionCode = info.versionCode; // 版本号
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
return currentVersionCode;
}
/**
* 获取服务器上版本信息
* @param context
* @param callBack
*/
public static void getAPPServerVersion(Context context, final VersionCallBack callBack){
HttpUtil.getObject(Api.GETVERSION.mapClear().addBody(), VersionInfo.class, new HttpUtil.ObjectCallback() {
@Override
public void result(boolean b, @Nullable Object obj) {
if (b){
callBack.callBack((VersionInfo) obj);
}
}
});
}
/**
* 判断版本号，更新APP
* @param context
*/
public static void updateApp(final Context context){
getAPPServerVersion(context, new VersionCallBack() {
@Override
public void callBack(final VersionInfo info) {
if (info != null && info.getVersionCode()!=null){
Log.i("this","版本信息：当前"+getAPPLocalVersion(context)+",服务器："+Integer.valueOf(info.getVersionCode()));
if (Integer.valueOf(info.getVersionCode()) > getAPPLocalVersion(context)){
ConfirmDialog dialog = new ConfirmDialog(context, new lht.wangtong.gowin120.doctor.views.feature.Callback() {
@Override
public void callback() {
DownloadAppUtils.downloadForAutoInstall(context, Api.HOST_IMG+info.getLoadPath(), "demo.apk", "更新demo");
}
});
dialog .setContent("发现新版本:"+info.getVersionNumber()+"\n是否下载更新?");
dialog.setCancelable(false);
dialog .show();
}
}
}
});
}
public interface VersionCallBack{
void callBack(VersionInfo info);
}
}
第二步、下载最新版apk
通过Android自带的DownloadManager下载管理器，下载服务器上最新版的apk。下载完成后会发送下载完成的广播。
/**
* Created by Teprinciple on 2016/11/15.
*/
public class DownloadAppUtils {
private static final String TAG = DownloadAppUtils.class.getSimpleName();
public static long downloadUpdateApkId = -1;//下载更新Apk 下载任务对应的Id
public static String downloadUpdateApkFilePath;//下载更新Apk 文件路径
/**
* 通过浏览器下载APK包
* @param context
* @param url
*/
public static void downloadForWebView(Context context, String url) {
Uri uri = Uri.parse(url);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setDataAndType(Uri.fromFile(new File(Environment
.getExternalStorageDirectory(), "tmp.apk")),
"application/vnd.android.package-archive");
context.startActivity(intent);
}
/**
* 下载更新apk包
* 权限:1,<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />
* @param context
* @param url
*/
public static void downloadForAutoInstall(Context context, String url, String fileName, String title) {
//LogUtil.e("App 下载 url="+url+",fileName="+fileName+",title="+title);
if (TextUtils.isEmpty(url)) {
return;
}
try {
Uri uri = Uri.parse(url);
DownloadManager downloadManager = (DownloadManager) context
.getSystemService(Context.DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(uri);
//在通知栏中显示
request.setVisibleInDownloadsUi(true);
request.setTitle(title);
String filePath = null;
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {//外部存储卡
filePath = Environment.getExternalStorageDirectory().getAbsolutePath();
} else {
T.showShort(context, R.string.download_sdcard_error);
return;
}
downloadUpdateApkFilePath = filePath + File.separator + fileName;
// 若存在，则删除
deleteFile(downloadUpdateApkFilePath);
Uri fileUri = Uri.parse("file://" + downloadUpdateApkFilePath);
request.setDestinationUri(fileUri);
downloadUpdateApkId = downloadManager.enqueue(request);
} catch (Exception e) {
e.printStackTrace();
downloadForWebView(context, url);
}
}
private static boolean deleteFile(String fileStr) {
File file = new File(fileStr);
return file.delete();
}
}
注意添加权限：
<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />
第三步、下载完成后跳转安装
通过广播接收者，接收到下载完成后发出的广播，跳转到系统的安装界面，进行安装。
/**
* Created by Teprinciple on 2016/11/15.
*/
public class UpdateAppReceiver extends BroadcastReceiver {
public UpdateAppReceiver() {
}
@Override
public void onReceive(Context context, Intent intent) {
// 处理下载完成
Cursor c=null;
try {
if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(intent.getAction())) {
if (DownloadAppUtils.downloadUpdateApkId >= 0) {
long downloadId = DownloadAppUtils.downloadUpdateApkId;
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(downloadId);
DownloadManager downloadManager = (DownloadManager) context
.getSystemService(Context.DOWNLOAD_SERVICE);
c = downloadManager.query(query);
if (c.moveToFirst()) {
int status = c.getInt(c
.getColumnIndex(DownloadManager.COLUMN_STATUS));
if (status == DownloadManager.STATUS_FAILED) {
downloadManager.remove(downloadId);
} else if (status == DownloadManager.STATUS_SUCCESSFUL) {
if (DownloadAppUtils.downloadUpdateApkFilePath != null) {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setDataAndType(
Uri.parse("file://"
+ DownloadAppUtils.downloadUpdateApkFilePath),
"application/vnd.android.package-archive");
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
}
}
}/* else if (DownloadManager.ACTION_NOTIFICATION_CLICKED.equals(intent.getAction())) {//点击通知取消下载
DownloadManager downloadManager = (DownloadManager) context
.getSystemService(Context.DOWNLOAD_SERVICE);
long[] ids = intent.getLongArrayExtra(DownloadManager.EXTRA_NOTIFICATION_CLICK_DOWNLOAD_IDS);
//点击通知栏取消下载
downloadManager.remove(ids);
}*/
} catch (Exception e) {
e.printStackTrace();
}finally {
if (c != null) {
c.close();
}
}
}
}
注意需要在AndroidMainfest.xml中注册receiver：
<receiver android:name=".updateapp.UpdateAppReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
<action android:name="android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED"/>
</intent-filter>
</receiver>
通过上面三步就可以快速实现APP的在线更新 。
项目地址：UpdateAppDemo
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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