Android中如何实现版本更新

Posted 2022-03-29 请叫我章鱼哥

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"/>