Android-在线apk更新

1、先建一个DownloadAPKFileTask类，继承AsyncTask

public class DownloadAPKFileTask extends AsyncTask<String, Void, File> {

    // 文件路径
    private String filePath;
    private String fileName;
    private Activity mContext;
    private DownloadAPKListener listener;
    private String savePath;

    public DownloadAPKFileTask(Activity context, String downloadUrl, String fileName, DownloadAPKListener listener) {
        mContext = context;
        this.filePath = downloadUrl;//"http://192.168.0.125:8081/static/publish/app-debug.apk";
        this.listener = listener;
        this.fileName = fileName;
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        if (null != listener) {
            listener.showProgressBar();
        }
    }
    //HGYDNew--自己的项目名
    @Override
    protected File doInBackground(String... params) {
        savePath = Environment
                .getExternalStorageDirectory().getAbsolutePath()
                + File.separator
                + "HGYDNew"
                + File.separator
                + fileName;
        File downloadFile = new File(savePath);
        if (downloadFile.exists()) {
            downloadFile.delete();
        }
        if (!downloadFile.getParentFile().exists()) {
            downloadFile.getParentFile().mkdirs();
        }
        try {
            URL url = new URL(filePath);
            URLConnection conn = url.openConnection();
            InputStream inputStream = conn.getInputStream();
            // 获取文件输出流对象
            OutputStream outputStream = new FileOutputStream(downloadFile);
            int bytesRead = 0;
            // 创建缓冲区字节数组
            byte[] buffer = new byte[2048];
            int lastProgress = 0;
            int currentProgress = 0;

            while ((bytesRead = inputStream.read(buffer, 0, buffer.length)) != -1) {
                if (isCancelled()) {
                    break;
                }
                outputStream.write(buffer, 0, bytesRead);
                currentProgress = (int) (downloadFile.length() * 100 / conn.getContentLength());
                if (currentProgress != lastProgress) {
                    lastProgress = currentProgress;
                    listener.onProgress(lastProgress);
                }
            }
            outputStream.close();
            inputStream.close();
            return downloadFile;
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }

    @Override
    protected void onPostExecute(File result) {
        super.onPostExecute(result);
        if (isCancelled()) {
            listener.onResult(null);
        }
        if (result != null && result.exists() && null != listener) {
            listener.onResult(result);
        } else {
//            ToastUtil.showToast(mContext.getResources().getString(R.string.download_file_fail));

            //提示下载失败

            listener.onResult(null);
        }
    }

    public interface DownloadAPKListener {
        void onResult(File file);

        void onProgress(int progress);

        void showProgressBar();
    }
}

2、在res下新建xml文件夹，然后新建filepaths.xml文件

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <paths>
        <external-path
            name="external_path"
            path="." />

    </paths>
</resources>

3、在drawable下新建bg_progress_download.xml文件，下载进度条的方法

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/progress">
        <clip>
            <shape>
                <corners android:radius="10dp" />
                <gradient
                    android:angle="0"
                    android:endColor="@color/color_ccb799"
                    android:startColor="@color/color_ccb799" />
            </shape>
        </clip>
    </item>
</layer-list>

4、在layout下，main.xml中添加进度条创建方法

    <ProgressBar
            android:id="@+id/pb_update"
            android:visibility="gone"
            android:layout_width="277.5dp"
            android:layout_height="7.5dp"
            android:layout_centerInParent="true"
            android:indeterminate="false"
            android:indeterminateOnly="false"
            android:max="100"
            android:progressDrawable="@drawable/bg_progress_download" />

5、color文件下添加进度条颜色值

    <!--下载条颜色-->
    <color name="color_ccb799">#ccb799</color>

6、配置AndroidManifest.xml

一、读取文件权限
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
    <uses-permission android:name="android.permission.INSTALL_PACKAGES_REQUESTCODE" />

二、application配置方法
        <!--配置方法,com.example.hgydnew是你自己项目的包名-->
        <provider
                android:name="androidx.core.content.FileProvider"
                android:authorities="com.example.hgydnew.fileprovider"
                android:exported="false"
                android:grantUriPermissions="true">
            <meta-data
                    android:name="android.support.FILE_PROVIDER_PATHS"
                    android:resource="@xml/filepaths" />
        </provider>

7、MainActivity中调用方法

一、全局定义
    //更新
    private DownloadAPKFileTask task;
    private ProgressBar pb_update;

    private static final int UPDATE = 1000;
    private static final int HIDE = 1001;
    private static final int SHOW = 1002;

二、onCreate
       //更新代码
        pb_update = view.findViewById(R.id.pb_update);

        task = new DownloadAPKFileTask(getActivity(), "https://download.baonahao.com/client/android/baonahao/jiayischool.apk", "zhxsfApp.apk", new DownloadAPKFileTask.DownloadAPKListener() {
            @Override
            public void onResult(File file) {
                Message obtain = Message.obtain();
                obtain.what = HIDE;
                obtain.arg1 = 0;
                handler.sendMessage(obtain);
                if (null != file) {
                    getInstallIntent(file);
                }
            }
            @Override
            public void onProgress(int progress) {

//                LogUtil.e("progress : " + progress);
                Message obtain = Message.obtain();
                obtain.what = UPDATE;
                obtain.arg1 = progress;
                handler.sendMessage(obtain);
            }
            @Override
            public void showProgressBar() {

                Message obtain = Message.obtain();
                obtain.what = SHOW;
                obtain.arg1 = 0;
                handler.sendMessage(obtain);

            }
        });

三、Handler调用
   //Handler方法
    private Handler handler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case UPDATE:
                    pb_update.setProgress(msg.arg1);
                    break;
                case SHOW:
                    pb_update.setVisibility(View.VISIBLE);
                    break;
                case HIDE:
                    pb_update.setVisibility(View.GONE);
                    try {
                        if (null != task) {
                            task.cancel(true);
                            task = null;
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                    break;
            }
        }
    };

四、定义getInstallIntent方法
   private void getInstallIntent(File file) {

        Uri uri = null;
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.addCategory("android.intent.category.DEFAULT");
        try {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {//7.0 Android NF
                //com.xxx.xxx.fileprovider为上述manifest中provider所配置相同
                //com.example.hgydnew是你自己项目的包名
                uri = FileProvider.getUriForFile(getContext(), "com.example.hgydnew.fileprovider", file);
                intent.setAction(Intent.ACTION_INSTALL_PACKAGE);
                intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);//7.0以后，系统要求授予临时uri读取权限，安装完毕以后，系统会自动收回权限，该过程没有用户交互
            } else {//7.0以下
                uri = Uri.fromFile(file);
                intent.setAction(Intent.ACTION_VIEW);
            }
            intent.setDataAndType(uri, "application/vnd.android.package-archive");
            getContext().startActivity(intent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

五、重写方法
 @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {

     switch (requestCode){
            case 1:
                task.execute();
                break;
            default:
                break;
        }
        super.onRequestPermissionsResult(requestCode,permissions,grantResults);
    }

六、点击调用-先获取权限，然后调用 task.execute()
if (ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE)
                        != PackageManager.PERMISSION_GRANTED&&ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.READ_EXTERNAL_STORAGE)
                        != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(getActivity(),new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.READ_EXTERNAL_STORAGE},1);
} else {
   task.execute();
}