Android中如何实现版本更新

在Activity中

首先

// 获取当前应用的版本号
public int getVerCode() {
int verCode = -1;
try {
verCode = getPackageManager().getPackageInfo("com.example.six", 0).versionCode;
} catch (PackageManager.NameNotFoundException e) {
}
return verCode;
}

int i = getVerCode();
if (2 > i) {
// 这里来检测版本是否需要更新
UpdateManager mUpdateManager = new UpdateManager(this);
mUpdateManager.checkUpdateInfo();
} else {
Toast.makeText(this, "已经是最新版本了无需更新", 0).show();
}

其次是调用一个UpdateManager类

package com.example.utils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import com.example.six.R;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;

public class UpdateManager {
private Context mContext;

// 提示语
private String updateMsg = "有最新的软件包哦，亲快下载吧~";

// 返回你需要安装的安装包url
private String apkUrl = "http://softfile.3g.qq.com:8080/msoft/179/24659/43549/qq_hd_mini_1.4.apk";
private Dialog noticeDialog;

private Dialog downloadDialog;
/* 下载包安装路径 */
private static final String savePath = "/sdcard/updatedemo/";

private static final String saveFileName = savePath
+ "UpdateDemoRelease.apk";

/* 进度条与通知ui刷新的handler和msg常量 */
private ProgressBar mProgress;

private static final int DOWN_UPDATE = 1;

private static final int DOWN_OVER = 2;

private int progress;

private Thread downLoadThread;

private boolean interceptFlag = false;
private Handler mHandler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case DOWN_UPDATE:
mProgress.setProgress(progress);
break;
case DOWN_OVER:
installApk();
break;
default:
break;
}
};
};

public UpdateManager(Context context) {
this.mContext = context;
}

// 外部接口让主Activity调用
public void checkUpdateInfo() {
showNoticeDialog();
}

private void showNoticeDialog() {
AlertDialog.Builder builder = new Builder(mContext);
builder.setTitle("软件版本更新");
builder.setMessage(updateMsg);
builder.setPositiveButton("下载", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
showDownloadDialog();
}
});
builder.setNegativeButton("以后再说", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
noticeDialog = builder.create();
noticeDialog.show();
}

private void showDownloadDialog() {
AlertDialog.Builder builder = new Builder(mContext);
builder.setTitle("软件版本更新");

final LayoutInflater inflater = LayoutInflater.from(mContext);
View v = inflater.inflate(R.layout.main_progress, null);
mProgress = (ProgressBar) v.findViewById(R.id.progress);
builder.setView(v);
builder.setNegativeButton("取消", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
interceptFlag = true;
}
});
downloadDialog = builder.create();
downloadDialog.show();

downloadApk();
}

private Runnable mdownApkRunnable = new Runnable() {
@Override
public void run() {
try {
URL url = new URL(apkUrl);

HttpURLConnection conn = (HttpURLConnection) url
.openConnection();
conn.connect();
int length = conn.getContentLength();
InputStream is = conn.getInputStream();

File file = new File(savePath);
if (!file.exists()) {
file.mkdir();
}
String apkFile = saveFileName;
File ApkFile = new File(apkFile);
FileOutputStream fos = new FileOutputStream(ApkFile);

int count = 0;
byte buf[] = new byte[1024];

do {
int numread = is.read(buf);
count += numread;
progress = (int) (((float) count / length) * 100);
// 更新进度
mHandler.sendEmptyMessage(DOWN_UPDATE);
if (numread <= 0) {
// 下载完成通知安装
mHandler.sendEmptyMessage(DOWN_OVER);
break;
}
fos.write(buf, 0, numread);
} while (!interceptFlag);// 点击取消就停止下载.

fos.close();
is.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

}
};

/**
* 下载apk
*
* @param url
*/

private void downloadApk() {
downLoadThread = new Thread(mdownApkRunnable);
downLoadThread.start();
}

/**
* 安装apk
*
* @param url
*/
private void installApk() {
File apkfile = new File(saveFileName);
if (!apkfile.exists()) {
return;
}
Intent i = new Intent(Intent.ACTION_VIEW);
i.setDataAndType(Uri.parse("file://" + apkfile.toString()),
"application/vnd.android.package-archive");
mContext.startActivity(i);

}
}

在清单文件中

<!-- 电话界面 -->
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<!-- 第三方登录 -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_LOGS" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.SET_DEBUG_APP" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.MANAGE_ACCOUNTS" />
<uses-permission android:name="android.permission.INTERNET"/>