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2018-07-02
来源 ：网络
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摘要：本文将带你了解Android源码之联网更新应用，希望本文对大家学Android有所帮助。
UpdateInfo
public class UpdateInfo {
public String version;//服务器的最新版本值
public String apkUrl;//最新版本的路径
public String desc;//版本更新细节
}
WelcomeActivity：
1 public class WelcomeActivity extends Activity { 2 3 private static final int TO_MAIN = 1; 4 private static final int DOWNLOAD_VERSION_SUCCESS = 2; 5 private static final int DOWNLOAD_APK_FAIL = 3; 6 private static final int DOWNLOAD_APK_SUCCESS = 4; 7 @Bind(R.id.iv_welcome_icon) 8 ImageView ivWelcomeIcon; 9 @Bind(R.id.rl_welcome) 10 RelativeLayout rlWelcome; 11 @Bind(R.id.tv_welcome_version) 12 TextView tvWelcomeVersion; 13 private boolean connect; 14 private long startTime; 15 16 private Handler handler = new Handler() { 17 @Override 18 public void handleMessage(Message msg) { 19 switch (msg.what) { 20 case TO_MAIN: 21 finish(); 22 startActivity(new Intent(WelcomeActivity.this, MainActivity.class)); 23 break; 24 case DOWNLOAD_VERSION_SUCCESS: 25 //获取当前应用的版本信息 26 String version = getVersion(); 27 //更新页面显示的版本信息 28 tvWelcomeVersion.setText(version); 29 //比较服务器获取的最新的版本跟本应用的版本是否一致 30 if(version.equals(updateInfo.version)){ 31 UIUtils.toast("当前应用已经是最新版本",false); 32 toMain(); 33 }else{ 34 new AlertDialog.Builder(WelcomeActivity.this) 35 .setTitle("下载最新版本") 36 .setMessage(updateInfo.desc) 37 .setPositiveButton("确定", new DialogInterface.OnClickListener() { 38 @Override 39 public void onClick(DialogInterface dialog, int which) { 40 //下载服务器保存的应用数据 41 downloadApk(); 42 } 43 }) 44 .setNegativeButton("取消", new DialogInterface.OnClickListener() { 45 @Override 46 public void onClick(DialogInterface dialog, int which) { 47 toMain(); 48 } 49 }) 50 .show(); 51 } 52 53 break; 54 case DOWNLOAD_APK_FAIL: 55 UIUtils.toast("联网下载数据失败",false); 56 toMain(); 57 break; 58 case DOWNLOAD_APK_SUCCESS: 59 UIUtils.toast("下载应用数据成功",false); 60 dialog.dismiss(); 61 installApk();//安装下载好的应用 62 finish();//结束当前的welcomeActivity的显示 63 break; 64 } 65 66 } 67 }; 68 69 private void installApk() { 70 Intent intent = new Intent("android.intent.action.INSTALL_PACKAGE"); 71 intent.setData(Uri.parse("file:" + apkFile.getAbsolutePath())); 72 startActivity(intent); 73 } 74 75 private ProgressDialog dialog; 76 private File apkFile; 77 private void downloadApk() { 78 //初始化水平进度条的dialog 79 dialog = new ProgressDialog(this); 80 dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); 81 dialog.setCancelable(false); 82 dialog.show(); 83 //初始化数据要保持的位置 84 File filesDir; 85 if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){ 86 filesDir = this.getExternalFilesDir(""); 87 }else{ 88 filesDir = this.getFilesDir(); 89 } 90 apkFile = new File(filesDir,"update.apk"); 91 92 //启动一个分线程联网下载数据： 93 new Thread(){ 94 public void run(){ 95 String path = updateInfo.apkUrl; 96 InputStream is = null; 97 FileOutputStream fos = null; 98 HttpURLConnection conn = null; 99 try {100 URL url = new URL(path);101 conn = (HttpURLConnection) url.openConnection();102 103 conn.setRequestMethod("GET");104 conn.setConnectTimeout(5000);105 conn.setReadTimeout(5000);106 107 conn.connect();108 109 if(conn.getResponseCode() == 200){110 dialog.setMax(conn.getContentLength());//设置dialog的最大值111 is = conn.getInputStream();112 fos = new FileOutputStream(apkFile);113 114 byte[] buffer = new byte[1024];115 int len;116 while((len = is.read(buffer)) != -1){117 //更新dialog的进度118 dialog.incrementProgressBy(len);119 fos.write(buffer,0,len);120 121 SystemClock.sleep(1);122 }123 124 handler.sendEmptyMessage(DOWNLOAD_APK_SUCCESS);125 126 }else{127 handler.sendEmptyMessage(DOWNLOAD_APK_FAIL);128 129 }130 131 } catch (Exception e) {132 e.printStackTrace();133 }finally{134 if(conn != null){135 conn.disconnect();136 }137 if(is != null){138 try {139 is.close();140 } catch (IOException e) {141 e.printStackTrace();142 }143 }144 if(fos != null){145 try {146 fos.close();147 } catch (IOException e) {148 e.printStackTrace();149 }150 }151 }152 153 154 }155 }.start();156 157 158 }159 160 private UpdateInfo updateInfo;161 162 @Override163 protected void onCreate(Bundle savedInstanceState) {164 super.onCreate(savedInstanceState);165 166 // 去掉窗口标题167 requestWindowFeature(Window.FEATURE_NO_TITLE);168 // 隐藏顶部的状态栏169 getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);170 171 setContentView(R.layout.activity_welcome);172 ButterKnife.bind(this);173 174 175 //将当前的activity添加到ActivityManager中176 ActivityManager.getInstance().add(this);177 //提供启动动画178 setAnimation();179 180 //联网更新应用181 updateApkFile();182 183 }184 185 /**186 * 当前版本号187 *188 * @return189 */190 private String getVersion() {191 String version = "未知版本";192 PackageManager manager = getPackageManager();193 try {194 PackageInfo packageInfo = manager.getPackageInfo(getPackageName(), 0);195 version = packageInfo.versionName;196 } catch (PackageManager.NameNotFoundException e) {197 //e.printStackTrace(); //如果找不到对应的应用包信息, 就返回"未知版本"198 }199 return version;200 }201 202 private void updateApkFile() {203 //获取系统当前时间204 startTime = System.currentTimeMillis();205 206 //1.判断手机是否可以联网207 boolean connect = isConnect();208 if (!connect) {//没有移动网络209 UIUtils.toast("当前没有移动数据网络", false);210 toMain();211 } else {//有移动网络212 //联网获取服务器的最新版本数据213 AsyncHttpClient client = new AsyncHttpClient();214 String url = AppNetConfig.UPDATE;215 client.post(url, new AsyncHttpResponseHandler() {216 @Override217 public void onSuccess(String content) {218 //解析json数据219 updateInfo = JSON.parseObject(content, UpdateInfo.class);220 handler.sendEmptyMessage(DOWNLOAD_VERSION_SUCCESS);221 }222 223 @Override224 public void onFailure(Throwable error, String content) {225 UIUtils.toast("联网请求数据失败", false);226 toMain();227 }228 });229 230 }231 }232 233 private void toMain() {234 long currentTime = System.currentTimeMillis();235 long delayTime = 3000 - (currentTime - startTime);236 if (delayTime < 0) {237 delayTime = 0;238 }239 240 241 handler.sendEmptyMessageDelayed(TO_MAIN, delayTime);242 }243 244 245 private void setAnimation() {246 AlphaAnimation alphaAnimation = new AlphaAnimation(0, 1);//0：完全透明 1：完全不透明247 alphaAnimation.setDuration(3000);248 alphaAnimation.setInterpolator(new AccelerateInterpolator());//设置动画的变化率249 250 //方式一：251 // alphaAnimation.setAnimationListener(new Animation.AnimationListener() {252 // @Override253 // public void onAnimationStart(Animation animation) {254 //255 // }256 // //当动画结束时：调用如下方法257 // @Override258 // public void onAnimationEnd(Animation animation) {259 // Intent intent = new Intent(WelcomeActivity.this,MainActivity.class);260 // startActivity(intent);261 // finish();//销毁当前页面262 // }263 //264 // @Override265 // public void onAnimationRepeat(Animation animation) {266 //267 // }268 // });269 //方式二：使用handler270 // handler.postDelayed(new Runnable() {271 // @Override272 // public void run() {273 // Intent intent = new Intent(WelcomeActivity.this, MainActivity.class);274 // startActivity(intent);275 //// finish();//销毁当前页面276 // //结束activity的显示，并从栈空间中移除277 // ActivityManager.getInstance().remove(WelcomeActivity.this);278 // }279 // }, 3000);280 281 //启动动画282 rlWelcome.startAnimation(alphaAnimation);283 284 }285 286 public boolean isConnect() {287 boolean connected = false;288 289 ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);290 NetworkInfo networkInfo = manager.getActiveNetworkInfo();291 if (networkInfo != null) {292 connected = networkInfo.isConnected();293 }294 return connected;295 }296 }
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