android 实现检测版本，下载apk更新(附源码)
其实这不是什么难事了，都有热更新的技术了，只是记录一下，大神勿嘲笑。
先说下思路，首先要有更新的接口，只要进入app，就监测一下接口，是否更新，更新的话，检测本地版本是否低于接口返回的版本，低的话，就根据返回的路径下载apk更新。接口返回的字段起码有 更新标志、更新版本，更新描述，apk下载地址。
更新标志应该有三种状态，更新，询问更新，强制更新，可以启动一个Service（不要忘记在清单文件中注册）来进行检查更新以及下载的工作；
这下面就是 Service里的全部代码，也不是很难理解，重要的地方都有注释。写好Service后，在代码中 startService()启动就可以了。
这里面弹出了一个讯问框，需要在清单文件中 加入权限， <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />，这是弹出全局讯问框的权限。
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.Service;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.example.sdtz.wenmingweifang.R;
import com.example.sdtz.wenmingweifang.Tool.OkHttpUtil;
import com.example.sdtz.wenmingweifang.Util.App;
import com.example.sdtz.wenmingweifang.Util.MyUrl;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* Created by sdtz on 2017/7/1.
*/
public class UpdateService extends Service {
private ProgressBar mProgressBar;//进度条
private TextView tv1;
private TextView tv2;
private String url = MyUrl.Httpurl;
private String VersionCode;
private String result;
private App app;
private String mSavePath;//apk保存地址
private String mVersion_path;
private String mVersion_name = "app.apk";//apk名
private float length;
private Dialog mDownloadDialog;//对话框
private int mProgress;//进度值
private static final int DOWNLOADING = 1;//apk下载中
private static final int DOWNLOAD_FINISH = 2;//apk下载完毕
private boolean mIsCancel = false;//是否取消下载标示符
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
private Handler mUpdateProgressHandler = new Handler(){
public void handleMessage(Message msg) {
switch (msg.what){
case DOWNLOADING:
// 设置进度条
mProgressBar.setProgress(mProgress);
tv1.setText( mProgress + "/100");
float len = length/1024/1024;//将length转换为M单位
float b = (float)(Math.round(len*100))/100;//保留两位小数点
tv2.setText( b+"M");
break;
case DOWNLOAD_FINISH:
// 隐藏当前下载对话框
mDownloadDialog.dismiss();
// 安装 APK 文件
installAPK();
break;
default:
break;
}
};
};
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
try {
VersionCode = getVersionName();
/* getJsonReuslt();*/
new OkHttpUtil().getJson(MyUrl.appdown, new OkHttpUtil.HttpCallBack() {
@Override
public void onSusscess(String data) throws JSONException {
JSONObject jo1 = new JSONObject(data);
app = new App();
app.setVersion(jo1.getString("version").toString());
app.setDescription(jo1.getString("description").toString());
app.setUrl(MyUrl.Httpurl+jo1.getString("url").toString());
app.setUpdate_flag(jo1.getString("update_flag").toString());
mVersion_path = app.getUrl();
//手机当前版本
String phoneVersion = VersionCode.substring(0,VersionCode.lastIndexOf("."));
Double jiekou = Double.parseDouble(app.getVersion());
Double bendi = null;
try {
bendi = Double.parseDouble(getVersionName());
} catch (Exception e) {
e.printStackTrace();
}
Log.d("==","接口："+jiekou+"本地："+bendi+"::"+app.toString());
//本地版本 与 接口返回版本 不一致，并且 更新标志为1 ，则更新
if( !VersionCode.equals(app.getVersion()) && (jiekou>bendi) && app.getUpdate_flag().equals("1")){
Log.d("==","::进入");
showDialog(app.getDescription());
}else if( !VersionCode.equals(app.getVersion()) && (jiekou>bendi) && app.getUpdate_flag().equals("2")){
showDownloadDialog();
}
}
});
} catch (Exception e) {
e.printStackTrace();
} catch (Throwable throwable) {
throwable.printStackTrace();
}
return super.onStartCommand(intent, flags, startId);
}
/*
* 获取当前程序的版本号
*/
private String getVersionName() throws Exception{
//获取packagemanager的实例
PackageManager packageManager = getPackageManager();
//getPackageName()是你当前类的包名，0代表是获取版本信息
PackageInfo packInfo = packageManager.getPackageInfo(getPackageName(), 0);
return packInfo.versionName;
}
private void showDialog(String drc) {
final AlertDialog.Builder builder = new AlertDialog.Builder(this,AlertDialog.THEME_HOLO_LIGHT);
builder.setMessage(drc);
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
showDownloadDialog();
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
alertDialog.setCanceledOnTouchOutside(true);
alertDialog.show();
alertDialog.getButton(alertDialog.BUTTON_POSITIVE).setTextColor(Color.GREEN);
alertDialog.getButton(alertDialog.BUTTON_NEGATIVE).setTextColor(Color.RED);
}
/*
* 开启新线程下载文件
*/
private void downloadAPK() {
new Thread(new Runnable() {
@Override
public void run() {
try{//检查sd是否挂载
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
String sdPath = Environment.getExternalStorageDirectory() + "/";
mSavePath = sdPath + "WenmingDownload";
File dir = new File(mSavePath);
if (!dir.exists())
dir.mkdir();
// 下载文件
HttpURLConnection conn = (HttpURLConnection) new URL(mVersion_path).openConnection();
conn.connect();
InputStream is = conn.getInputStream();
length = conn.getContentLength();
File apkFile = new File(mSavePath, mVersion_name);
FileOutputStream fos = new FileOutputStream(apkFile);
int count = 0;
byte[] buffer = new byte[1024];
while (!mIsCancel){
int numread = is.read(buffer);
count += numread;
// 计算进度条的当前位置
mProgress = (int) ((count/length) * 100);
// 更新进度条
mUpdateProgressHandler.sendEmptyMessage(DOWNLOADING);
// 下载完成
if (numread < 0){
mUpdateProgressHandler.sendEmptyMessage(DOWNLOAD_FINISH);
break;
}
fos.write(buffer, 0, numread);
}
fos.close();
is.close();
}
}catch(Exception e){
e.printStackTrace();
}
}
}).start();
}
/*
* 下载到本地后执行安装
*/
protected void installAPK() {
File apkFile = new File(mSavePath, mVersion_name);
if (!apkFile.exists())
return;
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.parse("file://" + apkFile.toString());
intent.setDataAndType(uri, "application/vnd.android.package-archive");
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.startActivity(intent);
}
/*
* 显示正在下载对话框
*/
protected void showDownloadDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("版本更新，下载中。。。");
View view = LayoutInflater.from(this).inflate(R.layout.dialog_progress, null);
mProgressBar = (ProgressBar) view.findViewById(R.id.id_progress);
tv1 = (TextView) view.findViewById(R.id.tv1);
tv2 = (TextView) view.findViewById(R.id.tv2);
builder.setView(view);
mDownloadDialog = builder.create();
mDownloadDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
mDownloadDialog.show();
// 下载文件
downloadAPK();
}
}
