android硬件檢測程序，android怎么做版本檢測,android 實現檢測版本，下載apk更新(附源碼)

其實這不是什么難事了，都有熱更新的技術了，只是記錄一下，大神勿嘲笑。

先說下思路，首先要有更新的接口，只要進入app，就監測一下接口，是否更新，更新的話，檢測本地版本是否低于接口返回的版本，低的話，就根據返回的路徑下載apk更新。接口返回的字段起碼有 更新標志、更新版本，更新描述，apk下載地址。

android硬件檢測程序。更新標志應該有三種狀態，更新，詢問更新，強制更新，可以啟動一個Service(不要忘記在清單文件中注冊)來進行檢查更新以及下載的工作；

這下面就是?Service里的全部代碼，也不是很難理解，重要的地方都有注釋。寫好Service后，在代碼中?startService()啟動就可以了。

這里面彈出了一個訊問框，需要在清單文件中 加入權限， ?，這是彈出全局訊問框的權限。

apk是什么。import android.app.AlertDialog;

import android.app.Dialog;

import android.app.Service;

android版本。import android.content.DialogInterface;

import android.content.Intent;

import android.content.pm.PackageInfo;

android。import android.content.pm.PackageManager;

import android.graphics.Color;

import android.net.Uri;

安卓版本？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;//進度條

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;//對話框

private int mProgress;//進度值

private static final int DOWNLOADING = 1;//apk下載中

private static final int DOWNLOAD_FINISH = 2;//apk下載完畢

private boolean mIsCancel = false;//是否取消下載標示符

@Nullable

@Override

public IBinder onBind(Intent intent) {

return null;

}

private Handler mUpdateProgressHandler = new Handler(){

public void handleMessage(Message msg) {

switch (msg.what){

case DOWNLOADING:

// 設置進度條

mProgressBar.setProgress(mProgress);

tv1.setText( mProgress + "/100");

float len = length/1024/1024;//將length轉換為M單位

float b = (float)(Math.round(len*100))/100;//保留兩位小數點

tv2.setText( b+"M");

break;

case DOWNLOAD_FINISH:

// 隱藏當前下載對話框

mDownloadDialog.dismiss();

// 安裝 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();

//手機當前版本

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 與 接口返回版本 不一致，并且 更新標志為1 ，則更新

if( !VersionCode.equals(app.getVersion()) && (jiekou>bendi) && app.getUpdate_flag().equals("1")){

Log.d("==","::進入");

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);

}

/*

* 獲取當前程序的版本號

*/

private String getVersionName() throws Exception{

//獲取packagemanager的實例

PackageManager packageManager = getPackageManager();

//getPackageName()是你當前類的包名，0代表是獲取版本信息

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("確定", 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);

}

/*

* 開啟新線程下載文件

*/

private void downloadAPK() {

new Thread(new Runnable() {

@Override

public void run() {

try{//檢查sd是否掛載

if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){

String sdPath = Environment.getExternalStorageDirectory() + "/";

mSavePath = sdPath + "WenmingDownload";

File dir = new File(mSavePath);

if (!dir.exists())

dir.mkdir();

// 下載文件

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;

// 計算進度條的當前位置

mProgress = (int) ((count/length) * 100);

// 更新進度條

mUpdateProgressHandler.sendEmptyMessage(DOWNLOADING);

// 下載完成

if (numread < 0){

mUpdateProgressHandler.sendEmptyMessage(DOWNLOAD_FINISH);

break;

}

fos.write(buffer, 0, numread);

}

fos.close();

is.close();

}

}catch(Exception e){

e.printStackTrace();

}

}

}).start();

}

/*

* 下載到本地后執行安裝

*/

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);

}

/*

* 顯示正在下載對話框

*/

protected void showDownloadDialog() {

AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setTitle("版本更新，下載中。。。");

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();

// 下載文件

downloadAPK();

}

}