弹出升级对话框
获取AlertDialog.Builder对象,通过new出来
调用Builder对象的setTitle()方法,参数:文本
调用Builder对象的setMessage()方法,参数:文本,json传回来的信息
调用Builder对象的setPositiveButton()方法,设置确定按钮
参数:文本,OnClickListener对象,匿名内部类实现,重写onClick()方法,
方法里面下载APK,替换安装
调用Builder对象的setNegativeButton()方法,参数和上面一样,点击后
关闭对话框调用AlertDialog对象的dismiss()方法,
跳转到主页
调用Builder对象的show()方法,显示出来
替换安装
检查sdcard是否存在,
调用Environment.getExternalStorageState()方法,返回状态,
判断Environment.MEDIA_MOUNTED,如果不想等提示一下,如果相等就下载APK
下载APK
使用第三方库,afinal,拷贝到项目的libs目录下面
实例化FinalHttp对象,通过new出来
调用FinalHttp对象的download(url,target,callback)方法,下载文件,
参数:url是路径,target是保存文件路径,callback是AjaxCallback对象
保存路径:Environment.getExternalStorageDirectory()+"/mobilesafe2.0.apk"
AjaxCallback是一个接口,通过new它实现接口,
重写以下方法,onFailure(),onSuccess(),onLoading()
下载失败
显示错误信息,吐司
正在下载 onLoading(long count,long current)
显示进度,在布局文件中添加一个TextView显示进度,位于左下角
在onLoading()方法里,计算拼接好setText()显示出来
下载成功 onSuccess()
安装apk,发送隐式意图,获取Intent对象,通过new
调用Intent对象的setAction()方法,设置动作,参数:android.intent.action.VIEW
调用Intent对象的addCategory()添加类型,参数:android.intent.category.DEFAULT
调用Intent对象的setDataAndType(),设置数据和类型,参数:Uri对象,
application/vnd.android.package-archive
Uri对象通过Uri.fromfile(),从文件中湖区Uri对象,参数是FIle对象
调用startActivity(intent),开启
需要写SD卡的权限,android.permission.WRITE_EXTERNAL_STORAFE
签名
在我们的android系统中,不允许安装两个包名相同的应用
例如:
A程序员开发了一款应用 com.tsh.A
B程序员开发了一款应用 com.tsh.A
包名相同,签名相同,可以替换安装
包名相同,签名不相同,安装失败
项目上右键 ==> export ==> Export Android Application ==>
create new keystore ==>
location 选中一个空文件最好命名 xxx.keystore
password 写上密码
confirm 重复密码==>
Alias 例如:mobilesafe
Password 刚才填的密码
Confirm 重复密码
Validity(years) 有效年份,过2030年,例如:40
下面的不重要,按自己的填 ==>
Destination APK file APK的保存路径
生成一个apk,生成了一个keystore文件(非常重要),设置的密码一定要记住
第二次导出的时候,
选择Use existing keystore
Password 写上刚才填的
代码:
package com.qingguow.mobilesafe; import java.io.File; java.io.IOException; java.io.InputStream; java.net.HttpURLConnection; java.net.MalformedURLException; java.net.URL; net.tsz.afinal.FinalHttp; net.tsz.afinal.http.AjaxCallBack; org.json.JSONException; org.json.JSONObject; android.app.Activity; android.app.AlertDialog; android.app.AlertDialog.Builder; android.content.DialogInterface; android.content.DialogInterface.OnClickListener; android.content.Intent; android.content.pm.PackageInfo; android.content.pm.PackageManager; android.net.Uri; android.os.Bundle; android.os.Environment; android.os.Handler; android.os.Message; android.util.Log; android.view.animation.AlphaAnimation; android.widget.TextView; android.widget.Toast; com.qingguow.mobilesafe.utils.StreamTools; public class SplashActivity extends Activity { private static final String TAG = "SplashActivity"; protected final int ENTER_HOME = 0int VERSION_UPDATE = 1int URL_ERROR = 2int NETWORK_ERROR = 3int JSON_ERROE = 4private TextView tv_splash_version; String description; String apkurl; TextView tv_show_progress; @Override void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_splash); tv_splash_version = (TextView) findViewById(R.id.tv_splash_version); tv_splash_version.setText("版本号" + getVersionName()); // 检查更新 checkVersion(); 界面动画 AlphaAnimation aa = new AlphaAnimation(0.2f,1.0f); aa.setDuration(1000); findViewById(R.id.rl_splash_root).setAnimation(aa); tv_show_progress=(TextView) findViewById(R.id.tv_show_progress); } private Handler handler = new Handler() { handleMessage(android.os.Message msg) { switch (msg.what) { case ENTER_HOME: enterHome(); break; VERSION_UPDATE: 弹窗提示 AlertDialog.Builder builder = new Builder(SplashActivity.this); builder.setTitle("提示更新"); builder.setMessage(description); builder.setPositiveButton("立即更新", OnClickListener() { @Override void onClick(DialogInterface arg0,1)">int arg1) { if (Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED)) { FinalHttp finalhttp= FinalHttp(); finalhttp.download(apkurl,Environment.getExternalStorageDirectory()+"/mobilesafe2.0.apk",1)">new AjaxCallBack<File>(){ 下载失败 @Override void onFailure(Throwable t,1)"> errorNo,String strMsg) { t.printStackTrace(); Toast.makeText(getApplicationContext(),"下载失败",1).show(); .onFailure(t,errorNo,strMsg); enterHome(); } 正在下载 void onLoading(long count,1)">long current) { int precent=(int)(current*100/count); tv_show_progress.setText("正在下载:"+precent+"%"); .onLoading(count,current); } 下载成功 onSuccess(File t) { Intent intent= Intent(); intent.setAction("android.intent.action.VIEW"); intent.addCategory("android.intent.category.DEFAULT"); intent.setDataAndType(Uri.fromFile(t),"application/vnd.android.package-archive"); startActivity(intent); .onSuccess(t); } }); } else { Toast.makeText(getApplicationContext(),"未检测到SD卡").show(); } } }); builder.setNegativeButton("稍后再说",1)"> arg1) { arg0.dismiss(); enterHome(); } }); builder.show(); URL_ERROR: Toast.makeText(getApplicationContext(),"URL错误",0).show(); enterHome(); NETWORK_ERROR: Toast.makeText(getApplicationContext(),"网络错误",1)"> JSON_ERROE: Toast.makeText(getApplicationContext(),"JSON解析错误",1)">; } } }; /** * 进入主页 */ enterHome() { Intent intent = new Intent(SplashActivity.this,HomeActivity.class); startActivity(intent); finish(); }; * 检查新版本 checkVersion() { Thread() { run() { long startTime = System.currentTimeMillis(); Message mes = Message.obtain(); URL url; try { url = URL(getString(R.string.serverurl)); HttpURLConnection conn = (HttpURLConnection) url .openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(4000); int code = conn.getResponseCode(); if (code == 200) { InputStream is = conn.getInputStream(); String result = StreamTools.readInputStream(is); JSONObject json = JSONObject(result); String newVersion = (String) json.get("version"); (newVersion.equals(getVersionName())) { 进入主界面 mes.what = ENTER_HOME; } { 版本更新 mes.what = VERSION_UPDATE; description = (String) json.get("description"); apkurl = (String) json.get("apkurl"); } } } catch (MalformedURLException e) { e.printStackTrace(); Log.i(TAG,"URL错误"); mes.what = URL_ERROR; } (IOException e) { e.printStackTrace(); Log.i(TAG,"网络连接错误" NETWORK_ERROR; } (JSONException e) { e.printStackTrace(); Log.i(TAG,"JSON解析错误" JSON_ERROE; } finally { 延迟效果 long endTime = System.currentTimeMillis(); long dTime = endTime - startTime; if (dTime < 3000) { { Thread.sleep(3000 - dTime); } (InterruptedException e) { } } handler.sendMessage(mes); } }; }.start(); } 获得应用版本名称 String getVersionName() { PackageManager pm = getPackageManager(); { PackageInfo info = pm.getPackageInfo(getPackageName(),1)">); return info.versionName; } (Exception e) { e.printStackTrace(); return ""; } } }