android 實現檢測版本，下載apk更新(附源碼)

標籤：service   out   protect   pen   bool   message   小數   大神   dem   

其實這不是什麼難事了，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，首先要有更新的介面，只要進入app，就監測一下介面，是否更新，更新的話，檢測本地版本是否低於介面返回的版本，低的話，就根據返回的路徑下載apk更新。介面返回的欄位起碼有 更新標誌、更新版本，更新描述，apk。

更新標誌應該有三種狀態，更新，詢問更新，強制更新，可以啟動一個Service（不要忘記在資訊清單檔中註冊）來進行檢查更新以及下載的工作；

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

這裡面彈出了一個訊問框，需要在資訊清單檔中 加入許可權，  <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />，這是彈出全域訊問框的許可權。

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;//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儲存地址    private String mVersion_path;    private String mVersion_name = "app.apk";//apk名    private float length;    private Dialog mDownloadDialog;//對話方塊    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:                    // 設定進度條                    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:                    // 隱藏當前下載對話方塊                    mDownloadDialog.dismiss();                    // 安裝 APK 檔案                    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();                    //手機目前的版本                    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("==","介面："+jiekou+"本地："+bendi+"::"+app.toString());                    //本地版本 與 介面返回版本 不一致，並且 更新標誌為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);    }    /*     * 擷取當前程式的版本號碼     */    private String getVersionName() throws Exception{        //擷取packagemanager的執行個體        PackageManager packageManager = getPackageManager();        //getPackageName()是你當前類的包名，0代表是擷取版本資訊        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);    }    /*     * 開啟新線程下載檔案     */    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();                        // 下載檔案                        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();    }    /*    * 下載到本地後執行安裝    */    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);    }    /*     * 顯示正在下載對話方塊     */    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();        // 下載檔案        downloadAPK();    }}

　　

android 實現檢測版本，下載apk更新(附源碼)