android軟體自動更新的實現步驟

標籤：自動更新   android應用   對話方塊   伺服器   

本篇文章是直接下載最新的APK安裝的方法，並不是增量下載該APk。

轉載請註明出處：http://blog.csdn.net/harryweasley/article/details/44955719，謝謝

想要實現一個android應用，自動更新下載APK軟體的方法，我採取的是以下幾步方法：

1.每次進入主介面時，擷取伺服器的資料，看是否是最新版本，是，則無操作，否，則進行以下步驟；

2.彈出是否更新軟體的對話方塊，點擊下載後

3.彈出下載的進度條的對話方塊，開始下載，可以上隨時點擊按鈕，停止下載

4.下載完成後，調用系統安裝軟體的服務，安裝軟體

：

實現過程：

建立一個UpdateManager方法，具體內容我已經有詳細的注釋

package lgx.acc.updatedemo;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import android.app.AlertDialog;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.net.Uri;import android.os.Handler;import android.view.LayoutInflater;import android.view.View;import android.widget.ProgressBar;import android.widget.TextView;public class UpdateManager {// 應用程式Contextprivate Context mContext;// 是否是最新的應用,預設為falseprivate boolean isNew = false;private boolean intercept = false;// 下載安裝包的網路路徑private String apkUrl = "http://shouji.360tpcdn.com/360sj/tpi/20130201/"+ "com.flikie.wallpapers.gallery_4.apk";// 儲存APK的檔案夾private static final String savePath = "/sdcard/updatedemo/";private static final String saveFileName = savePath+ "UpdateDemoRelease.apk";// 下載線程private Thread downLoadThread;private int progress;// 當前進度TextView text;// 進度條與通知UI重新整理的handler和msg常量private ProgressBar mProgress;private static final int DOWN_UPDATE = 1;private static final int DOWN_OVER = 2;public UpdateManager(Context context) {mContext = context;}/** * 檢查是否更新的內容 */public void checkUpdateInfo() {//這裡的isNew本來是要從伺服器擷取的，我在這裡先假設他需要更新if (isNew) {return;} else {showUpdateDialog();}}/** * 顯示更新程式對話方塊，供主程式調用 */private void showUpdateDialog() {AlertDialog.Builder builder = new AlertDialog.Builder(mContext);builder.setTitle("軟體版本更新");builder.setMessage("有最新的軟體包，請下載!");builder.setPositiveButton("下載", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {showDownloadDialog();}});builder.setNegativeButton("以後再說",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();}});builder.create().show();}/** * 顯示下載進度的對話方塊 */private void showDownloadDialog() {AlertDialog.Builder builder = new AlertDialog.Builder(mContext);builder.setTitle("軟體版本更新");LayoutInflater inflater = LayoutInflater.from(mContext);View v = inflater.inflate(R.layout.progress, null);mProgress = (ProgressBar) v.findViewById(R.id.progress);builder.setView(v);builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {intercept = true;}});builder.show();downloadApk();}/** * 從伺服器下載APK安裝包 */private void downloadApk() {downLoadThread = new Thread(mdownApkRunnable);downLoadThread.start();}private Runnable mdownApkRunnable = new Runnable() {@Overridepublic void run() {URL url;try {url = new URL(apkUrl);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.connect();int length = conn.getContentLength();InputStream ins = conn.getInputStream();File file = new File(savePath);if (!file.exists()) {file.mkdir();}File apkFile = new File(saveFileName);FileOutputStream fos = new FileOutputStream(apkFile);int count = 0;byte[] buf = new byte[1024];while (!intercept) {int numread = ins.read(buf);count += numread;progress = (int) (((float) count / length) * 100);// 下載進度mHandler.sendEmptyMessage(DOWN_UPDATE);if (numread <= 0) {// 下載完成通知安裝mHandler.sendEmptyMessage(DOWN_OVER);break;}fos.write(buf, 0, numread);}fos.close();ins.close();} catch (Exception e) {e.printStackTrace();}}};/** * 安裝APK內容 */private void installAPK() {File apkFile = new File(saveFileName);if (!apkFile.exists()) {return;}Intent intent = new Intent(Intent.ACTION_VIEW);intent.setDataAndType(Uri.parse("file://" + apkFile.toString()),"application/vnd.android.package-archive");mContext.startActivity(intent);};private Handler mHandler = new Handler() {public void handleMessage(android.os.Message msg) {switch (msg.what) {case DOWN_UPDATE:mProgress.setProgress(progress);break;case DOWN_OVER:installAPK();break;default:break;}}};}

還有progressBar.xml的具體代碼

<?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="match_parent"    android:orientation="vertical" >    <ProgressBar        android:id="@+id/progress"        style="?android:attr/progressBarStyleHorizontal"        android:layout_width="fill_parent"        android:layout_height="wrap_content" />  </LinearLayout>

之後在MainActivity的onCreate方法中，調用一下代碼即可

UpdateManager manager=new UpdateManager(MainActivity.this);manager.checkUpdateInfo();

一定要記得在manifest裡面加許可權哈，

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

最後效果就出來了。

有什麼建議請多多指教~~~~

android軟體自動更新的實現步驟