xt mContext;
//提示语
private String updateMsg = '有最新的软件包哦，亲快下载吧~';
//返回的安装包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;
private static final String savePath = '/sdcard/updatedemo/';
private static final String saveFileName = savePath +
'UpdateDemoRelease.apk';
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.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();
}
}
};
private void downloadApk(){
downLoadThread = new Thread(mdownApkRunnable);
downLoadThread.start();
}
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);
}
}
第三步：在MainActivity.java也就是主Activity调用,代码如下:
package com.tutor.update;
import android.app.Activity;
import android.os.Bundle;
public class MainAcitivity extends Activity {
private UpdateManager mUpdateManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//这里来检测版本是否需要更新
mUpdateManager = new UpdateManager(this);
mUpdateManager.checkUpdateInfo();
}
}
3、添加程序所用的资源与权限：
下载的时候用到了ProgressBar,所以事先写了一个progress.xml布局文件，代码如下:
xmlns:android='
http://schemas.android.com/apk/res/android'
android:layout_width='fill_parent'
android:layout_height='wrap_content'>
android:id='@+id/progress'
android:layout_width='fill_parent'
android:layout_height='wrap_content'
style='?android:attr/progressBarStyleHorizont
al'
/>
4、运行查看。
