自动检测版本更新的流程

强制自动更新的流程

我们首先在主的Activity或者是Fragment 里面调用，如果有新的版本的话就让他自动强制更新。

首先是获取当前版本号的方法代码如下:

 //获取当前版本号的方法
    public String getVersionCode(Context context){
        PackageManager packageManager=context.getPackageManager();
        PackageInfo packageInfo;
        String versionCode="";
        try {
            packageInfo=packageManager.getPackageInfo(context.getPackageName(),0);
            versionCode=packageInfo.versionCode+"";
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return versionCode;
    }

下面就是要获取接口看是否有新的版本，就是调用接口这是我的接口实现获取内容：

   //    解析借口获取新的版本号
public void getDatabanCode(){
    AppContext.getHttpService().getUpdatecheck()
            .compose(RxLifecycleCompact.bind(this).withObservable())
            .compose(RxLifeCycleCompat.callerSchedulers())
            .subscribe(new BaseObserver() {
                @Override
                public void onSuccess(@NonNull BanBenBean banBenBean) {
                    final String content = banBenBean.getContent();
                    if (banBenBean.getNew_version_name().equals(getVersionCode(getActivity()))) {
                        ToastMan.showShortToast("是最新版本");
                    }else {
                        ShowDialog(content, banBenBean.getDownload_url());

                    }
                }

                @Override
                public void onFail(Throwable e) {

                }
            });
} 

定义Dialog实现弹出的内容比如：确定和取消，代码如下：

//    定义dialog
    private void ShowDialog(String content,
                            final String url) {
   Toast.makeText(getActivity(),""+content,Toast.LENGTH_SHORT).show();

        new android.app.AlertDialog.Builder(getActivity())
                .setTitle("版本更新")
                .setMessage(content+"加快还款法核算的")
                .setPositiveButton("更新", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        pBar = new CommonProgressDialog(getActivity());
                        pBar.setCanceledOnTouchOutside(false);
                        pBar.setTitle("正在下载");
                        pBar.setCustomTitle(LayoutInflater.from(
                                getActivity()).inflate(
                                R.layout.title_dialog, null));
                        pBar.setMessage("正在下载");
                        pBar.setIndeterminate(true);
                        pBar.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                        pBar.setCancelable(true);
                        // downFile(URLData.DOWNLOAD_URL);
                        final DownloadTask downloadTask = new DownloadTask(
                              getActivity());
                        downloadTask.execute(url);
                        pBar.setOnCancelListener(new DialogInterface.OnCancelListener() {
                            @Override
                            public void onCancel(DialogInterface dialog) {
                                downloadTask.cancel(true);
                            }
                        });
                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }
                })
                .show();
    }

在创建一个类内部类实现异步请求代码这里面的代码不用更改直接粘贴里面就能用如下：

    /**
     * 下载应用
     *
     * @author Administrator
     */
    class DownloadTask extends AsyncTask {

        private Context context;
        private PowerManager.WakeLock mWakeLock;

        public DownloadTask(Context context) {
            this.context = context;
        }

        @Override
        protected String doInBackground(String... sUrl) {
            InputStream input = null;
            OutputStream output = null;
            HttpURLConnection connection = null;
            File file = null;
            try {
                URL url = new URL(sUrl[0]);
                connection = (HttpURLConnection) url.openConnection();
                connection.connect();
                // expect HTTP 200 OK, so we don't mistakenly save error
                // report
                // instead of the file
                if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
                    return "Server returned HTTP "
                            + connection.getResponseCode() + " "
                            + connection.getResponseMessage();
                }
                // this will be useful to display download percentage
                // might be -1: server did not report the length
                int fileLength = connection.getContentLength();
                if (Environment.getExternalStorageState().equals(
                        Environment.MEDIA_MOUNTED)) {
                    file = new File(Environment.getExternalStorageDirectory(),
                            DOWNLOAD_NAME);

                    if (!file.exists()) {
                        // 判断父文件夹是否存在
                        if (!file.getParentFile().exists()) {
                            file.getParentFile().mkdirs();
                        }
                    }

                } else {
                    Toast.makeText(getActivity(), "sd卡未挂载",
                            Toast.LENGTH_LONG).show();
                }
                input = connection.getInputStream();
                output = new FileOutputStream(file);
                byte data[] = new byte[4096];
                long total = 0;
                int count;
                while ((count = input.read(data)) != -1) {
                    // allow canceling with back button
                    if (isCancelled()) {
                        input.close();
                        return null;
                    }
                    total += count;
                    // publishing the progress....
                    if (fileLength > 0) // only if total length is known
                        publishProgress((int) (total * 100 / fileLength));
                    output.write(data, 0, count);

                }
            } catch (Exception e) {
                System.out.println(e.toString());
                return e.toString();

            } finally {
                try {
                    if (output != null)
                        output.close();
                    if (input != null)
                        input.close();
                } catch (IOException ignored) {
                }
                if (connection != null)
                    connection.disconnect();
            }
            return null;
        }

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // take CPU lock to prevent CPU from going off if the user
            // presses the power button during download
            PowerManager pm = (PowerManager) context
                    .getSystemService(Context.POWER_SERVICE);
            mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
                    getClass().getName());
            mWakeLock.acquire();
            pBar.show();
        }

        @Override
        protected void onProgressUpdate(Integer... progress) {
            super.onProgressUpdate(progress);
            // if we get here, length is known, now set indeterminate to false
            pBar.setIndeterminate(false);
            pBar.setMax(100);
            pBar.setProgress(progress[0]);
        }

        @Override
        protected void onPostExecute(String result) {
            mWakeLock.release();
            pBar.dismiss();
            if (result != null) {

                // 申请多个权限。
                AndPermission.with(getActivity())
                        .requestCode(REQUEST_CODE_PERMISSION_SD)
                        .permission(Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE)
                        // rationale作用是：用户拒绝一次权限，再次申请时先征求用户同意，再打开授权对话框，避免用户勾选不再提示。
                        .rationale(rationaleListener
                        )
                        .send();


                Toast.makeText(context, "您未打开SD卡权限" + result, Toast.LENGTH_LONG).show();
            } else {
                // Toast.makeText(context, "File downloaded",
                // Toast.LENGTH_SHORT)
                // .show();
                update();
            }

        }
    }

    private static final int REQUEST_CODE_PERMISSION_SD = 101;

    private static final int REQUEST_CODE_SETTING = 300;
    private RationaleListener rationaleListener = new RationaleListener() {
        @Override
        public void showRequestPermissionRationale(int requestCode, final Rationale rationale) {
            // 这里使用自定义对话框，如果不想自定义，用AndPermission默认对话框：
            // AndPermission.rationaleDialog(Context, Rationale).show();

            // 自定义对话框。
            AlertDialog.build(getActivity())
                    .setTitle(R.string.title_dialog)
                    .setMessage(R.string.message_permission_rationale)
                    .setPositiveButton(R.string.btn_dialog_yes_permission, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.cancel();
                            rationale.resume();
                        }
                    })

                    .setNegativeButton(R.string.btn_dialog_no_permission, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.cancel();
                            rationale.cancel();
                        }
                    })
                    .show();
        }
    };
    //----------------------------------SD权限----------------------------------//


    @PermissionYes(REQUEST_CODE_PERMISSION_SD)
    private void getMultiYes(List grantedPermissions) {
        Toast.makeText(getActivity(), R.string.message_post_succeed, Toast.LENGTH_SHORT).show();
    }

    @PermissionNo(REQUEST_CODE_PERMISSION_SD)
    private void getMultiNo(List deniedPermissions) {
        Toast.makeText(getActivity(), R.string.message_post_failed, Toast.LENGTH_SHORT).show();

        // 用户否勾选了不再提示并且拒绝了权限，那么提示用户到设置中授权。
        if (AndPermission.hasAlwaysDeniedPermission(this, deniedPermissions)) {
            AndPermission.defaultSettingDialog(this, REQUEST_CODE_SETTING)
                    .setTitle(R.string.title_dialog)
                    .setMessage(R.string.message_permission_failed)
                    .setPositiveButton(R.string.btn_dialog_yes_permission)
                    .setNegativeButton(R.string.btn_dialog_no_permission, null)
                    .show();

            // 更多自定dialog，请看上面。
        }
    }

    //----------------------------------权限回调处理----------------------------------//

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[]
            grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        /**
         * 转给AndPermission分析结果。
         *
         * @param object     要接受结果的Activity、Fragment。
         * @param requestCode  请求码。
         * @param permissions  权限数组，一个或者多个。
         * @param grantResults 请求结果。
         */
        AndPermission.onRequestPermissionsResult(this, requestCode, permissions, grantResults);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case REQUEST_CODE_SETTING: {
                Toast.makeText(getActivity(), R.string.message_setting_back, Toast.LENGTH_LONG).show();
                //设置成功，再次请求更新
//                getVersion(Tools.getVersion(getActivity()));
                break;
            }
        }
    }


    private void update() {
        //安装应用
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.fromFile(new File(Environment
                        .getExternalStorageDirectory(), DOWNLOAD_NAME)),
                "application/vnd.android.package-archive");
        startActivity(intent);
    }

里面还缺少一个类tools

package com.hsy.update.utils;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Environment;


public class Tools {
    /**
     * 检查是否存在SDCard
     *
     * @return
     */
    public static boolean hasSdcard() {
        String state = Environment.getExternalStorageState();
        if (state.equals(Environment.MEDIA_MOUNTED)) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * 2 * 获取版本号 3 * @return 当前应用的版本号 4
     */
    public static int getVersion(Context context) {
        try {
            PackageManager manager = context.getPackageManager();
            PackageInfo info = manager.getPackageInfo(context.getPackageName(),
                    0);
            String version = info.versionName;
            int versioncode = info.versionCode;
            return versioncode;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return 0;
    }

}

还有一个自定义进度条的类代码如下：

public class CommonProgressDialog extends AlertDialog {
    private ProgressBar mProgress;
    private TextView mProgressNumber;
    private TextView mProgressPercent;
    private TextView mProgressMessage;
    private Handler mViewUpdateHandler;
    private int mMax;
    private CharSequence mMessage;
    private boolean mHasStarted;
    private int mProgressVal;
    private String TAG = "CommonProgressDialog";
    private String mProgressNumberFormat;
    private NumberFormat mProgressPercentFormat;

    public CommonProgressDialog(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
        initFormats();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.common_progress_dialog);
        mProgress = (ProgressBar) findViewById(R.id.progress);
        mProgressNumber = (TextView) findViewById(R.id.progress_number);
        mProgressPercent = (TextView) findViewById(R.id.progress_percent);
        mProgressMessage = (TextView) findViewById(R.id.progress_message);
        // LayoutInflater inflater = LayoutInflater.from(getContext());
        mViewUpdateHandler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                // TODO Auto-generated method stub
                super.handleMessage(msg);
                int progress = mProgress.getProgress();
                int max = mProgress.getMax();
                double dProgress = (double) progress / (double) (1024 * 1024);
                double dMax = (double) max / (double) (1024 * 1024);
                if (mProgressNumberFormat != null) {
                    String format = mProgressNumberFormat;
                    mProgressNumber.setText(String.format(format, dProgress,
                            dMax));
                } else {
                    mProgressNumber.setText("");
                }
                if (mProgressPercentFormat != null) {
                    double percent = (double) progress / (double) max;
                    SpannableString tmp = new SpannableString(
                            mProgressPercentFormat.format(percent));
                    tmp.setSpan(new StyleSpan(android.graphics.Typeface.BOLD),
                            0, tmp.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                    mProgressPercent.setText(tmp);
                } else {
                    mProgressPercent.setText("");
                }
            }
        };
        // View view = inflater.inflate(R.layout.common_progress_dialog, null);
        // mProgress = (ProgressBar) view.findViewById(R.id.progress);
        // mProgressNumber = (TextView) view.findViewById(R.id.progress_number);
        // mProgressPercent = (TextView)
        // view.findViewById(R.id.progress_percent);
        // setView(view);
        // mProgress.setMax(100);
        onProgressChanged();
        if (mMessage != null) {
            setMessage(mMessage);
        }
        if (mMax > 0) {
            setMax(mMax);
        }
        if (mProgressVal > 0) {
            setProgress(mProgressVal);
        }
    }

    private void initFormats() {
        mProgressNumberFormat = "%1.2fM/%2.2fM";
        mProgressPercentFormat = NumberFormat.getPercentInstance();
        mProgressPercentFormat.setMaximumFractionDigits(0);
    }

    private void onProgressChanged() {
        mViewUpdateHandler.sendEmptyMessage(0);
    }

    public void setProgressStyle(int style) {
        // mProgressStyle = style;
    }

    public int getMax() {
        if (mProgress != null) {
            return mProgress.getMax();
        }
        return mMax;
    }

    public void setMax(int max) {
        if (mProgress != null) {
            mProgress.setMax(max);
            onProgressChanged();
        } else {
            mMax = max;
        }
    }

    public void setIndeterminate(boolean indeterminate) {
        if (mProgress != null) {
            mProgress.setIndeterminate(indeterminate);
        }
        // else {
        // mIndeterminate = indeterminate;
        // }
    }

    public void setProgress(int value) {
        if (mHasStarted) {
            mProgress.setProgress(value);
            onProgressChanged();
        } else {
            mProgressVal = value;
        }
    }

    @Override
    public void setMessage(CharSequence message) {
        // TODO Auto-generated method stub
        // super.setMessage(message);
        if (mProgressMessage != null) {
            mProgressMessage.setText(message);
        } else {
            mMessage = message;
        }
    }

    @Override
    protected void onStart() {
        // TODO Auto-generated method stub
        super.onStart();
        mHasStarted = true;
    }

    @Override
    protected void onStop() {
        // TODO Auto-generated method stub
        super.onStop();
        mHasStarted = false;
    }

}

最后还缺少两个XML文件

文件一

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="10dp" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"

        android:orientation="vertical" >

        <TextView
            android:id="@+id/progress_message"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="20dp"
            android:textColor="#000000"
            android:textSize="20sp" />

        <ProgressBar
            android:id="@+id/progress"
            style="?android:attr/progressBarStyleHorizontal"
            android:layout_width="match_parent"
            android:layout_height="30px"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:layout_marginTop="20dp"
            android:progressDrawable="@drawable/common_progressdialog_progressbar_background" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="20dp"
            android:gravity="center"
            android:orientation="horizontal" >

            <TextView
                android:id="@+id/progress_percent"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:gravity="center_horizontal"
                android:text="4"
                android:textColor="@color/red"
                android:textSize="15sp" />

            <TextView
                android:id="@+id/progress_number"
                android:layout_width="250px"
                android:layout_height="wrap_content"
                android:layout_marginLeft="120px"
                android:gravity="center_horizontal"
                android:textColor="@color/red"
                android:textSize="30px"
                android:visibility="gone" />
        LinearLayout>
    LinearLayout>

FrameLayout>

XML文件二

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="正在下载"
        android:textColor="@color/white"
        android:textSize="15sp" />

LinearLayout>

这样基本实现检测版本实现自动下载的 功能，最后检查一下权限

    /*权限获取*/
    compile 'com.yanzhenjie:permission:1.0.5'
      
    <uses-permission android:name="android.permission.INTERNET" />
    
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

本文总结：如果实现不了自动更新的话可以加我QQ939986850和我交流也可以扫描下面的二维码加入我的公众号了解更多,谢谢大家的支持，希望大家互相交流共同进步实现我们人生最大的价值而奋斗，！！！