Android在线升级适配7.0系统、带进度条

最新推荐文章于 2025-06-13 09:35:54 发布

原创最新推荐文章于 2025-06-13 09:35:54 发布 · 764 阅读

CC 4.0 BY-SA版权

本文介绍了一个Android应用程序如何实现检查更新并下载新版本APK的过程，包括显示更新对话框、使用进度条显示下载进度、从服务器下载文件及安装新版本APK等步骤。

protected void showUpdataDialog() {
        downLoadApk();
    }

    public void downLoadApk() {

        final ProgressDialog pd; // 进度条对话框
        pd = new ProgressDialog(this);
        pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        pd.setMessage("正在下载更新");
        pd.setCancelable(false);
        pd.setOnCancelListener(new DialogInterface.OnCancelListener() {
            @Override
            public void onCancel(DialogInterface arg0) {
            }
        });
        pd.show();
        new Thread() {
            @Override
            public void run() {
                try {
                    File file = getFileFromServer(downloadUrl, pd);
                    sleep(1000);
                    installApk(file);
                    pd.dismiss(); // 结束掉进度条对话框
                } catch (Exception e) {
                    pd.dismiss(); // 结束掉进度条对话框
                    Message msg = new Message();
                    Bundle b = new Bundle();
                    msg.what = 5;
                    b.putInt("ret", 0);
                    msg.setData(b);
//                    handler.sendMessage(msg);
                    e.printStackTrace();
                }
            }
        }.start();
    }

    // 安装apk
    protected void installApk(File file) {
        Intent intent = new Intent();
        // 执行动作
        intent.setAction(Intent.ACTION_VIEW);
        // 执行的数据类型
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            //7.0
            Uri uriForFile = FileProvider.getUriForFile(UP72Application.getContext(),
                    "com.up72.football.fileprovider", file);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.setDataAndType(uriForFile, "application/vnd.android.package-archive");
        } else {
            intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
        }
//        intent.setDataAndType(Uri.fromFile(file),
//                "application/vnd.android.package-archive");
        startActivity(intent);
    }

    // 从服务端下载apk文件
    public File getFileFromServer(String path, ProgressDialog pd)
            throws Exception {
        HttpClient client = new DefaultHttpClient();
        HttpGet get = new HttpGet(path);
        HttpResponse response;
        response = client.execute(get);

        HttpEntity entity = response.getEntity();
        long length = entity.getContentLength();

        pd.setMax((int) length);// 设置进度条的最大值
        InputStream is = entity.getContent();
        FileOutputStream fileOutputStream = null;
        File file = null;

        if (is != null) {
             file = new File(Environment.getExternalStorageDirectory(),
                    "updata.apk");

            if (file.exists()) {
                file.delete();
            }
            LogUtil.e("file", "file:" + file.getAbsolutePath());
            fileOutputStream = new FileOutputStream(file);
            byte[] buf = new byte[1024];
            int ch = -1;
            int count = 0;
            while ((ch = is.read(buf)) != -1) {
                fileOutputStream.write(buf, 0, ch);
                count += ch;
                if (length > 0) {
                    pd.setProgress(count);
                }
            }
        }
        fileOutputStream.flush();

        if (fileOutputStream != null) {
            fileOutputStream.close();
        }
        // 对文件的长度判断下
        if (file.length() == length) {
            return file;
        } else {
            deleteFile(file);
            return null;
        }
    }

// 删除文件
public static void deleteFile(File file) {
    if (file != null && file.exists() && !file.isDirectory()) {
        file.delete();
    }
}